Burl & Burr

Burl (pronounced burl)

(1) A small knot or lump in wool, thread, or cloth.

(2) A dome-shaped growth on the trunk of a tree; a wart-like structure which can be 1 m (39 inches) or more across and .5 m (19 inches) or more in height; typically harvested and sliced to make the intricately patterned veneers used in furniture or car interiors.

(3) To remove burls from (cloth) in finishing (which technically means the same as to de-burl).

(4) In Scottish, Australian and NZ slang (1) an attempt; to try (especially in the phrases “give it a burl” & (2) “going for a burl” (going for a drive in a car) (both largely archaic and the latter restricted to the antipodes).

1400–1450: From the late Middle English burle (a small knot or flaw in cloth), from the Old French bouril & bourril (flocks or ends of threads which disfigure cloth), from the Old French bourre & burle (tuft of wool) and akin to the Medieval Latin burla (bunch, sheaf), from the Vulgar Latin burrula (small flock of wool), from the Medieval Latin burra (flock of wool, fluff, coarse hair; shaggy cloth).  The source of the Latin forms is unknown.  The slang forms are probably from the Scottish birl (a twist or turn) but use in this sense seems now to be restricted to Scotland (or those with a Scottish accent) and the South Island of New Zealand.  The large, rounded outgrowth on the trunk or branch of a tree can be highly prized if on a species (most famously walnut) where the timber of a burl develops the swirling, intricate patterns which are used as thinly sliced veneers in the production of furniture and other fine products, notably as trim in the interiors of cars.  Burls develop from one or more twig buds, the cells of which continue to multiply but never differentiate so the twig can elongate into a limb.  In American English, burl has since 1868 been used to describe "a knot or excrescence on a walnut or other tree" but burr is now often used interchangeably while "burlwood", once common, seems now restricted to industry use and commerce.  Burls rarely cause harm to trees but careless (often unlawful) harvesting can cause damage.  The adjective burly (a man large, well-built and muscular) is unrelated and of uncertain origin; the related noun is used of this quality and not the character of timber.  The noun, verb & adjective burlesque is also unrelated.  Burl is a noun & verb, burler is a noun and burled & burling are verbs; the noun plural is burls.  

European burr (or burl) walnut with extensive “bud eyes”.

Burl was productive in English although some forms have a tangled history.  The adjective burly is derived from the circa 1300 borlich (excellent, noble; handsome, beautiful), probably from the Old English borlice (noble, stately (literally "bowerly", ie fit to frequent a lady's apartment)).  The sense evolved by circa 1400 to mean "stout, sturdy" and later "heavily built".  Some etymologists also suggest a connection between the Old English and the Old High German burlih (lofty, exalted) which was related to burjan (to raise, lift).  In Middle English, it was applied also to objects (even transitory things like cloud formations) but has long been restricted to people.   The noun burlesque (piece composed in burlesque style, derisive imitation, grotesque parody) had been in use since the 1660s, the earlier adjective (odd, grotesque), from the 1650s, from the sixteenth century French burlesque, from the Italian burlesco (ludicrous), from burla (joke, fun, mockery), presumably from the Medieval Latin burra (trifle, nonsense (literally "flock of wool" and thing something light and trivial)).  The more precise adjectival meaning "tending to excite laughter by ludicrous contrast between the subject and the manner of treating it" is attested in English by 1700.  Comedy and burlesque represent the two great traditions of representational ridicule, the former draws characters in conventional form, the latter by using a construct quite unlike themselves.  As long ago a 1711, one critic described burlesque as existing in two forms, the first represents mean persons in accoutrements of heroes, the other describes great persons acting and speaking like the basest among the people.  By the late nineteenth century, it typically meant "travesties on the classics and satires on accepted ideas" and vulgar comic opera while the modern sense of something risqué ("a variety show featuring striptease) is an invention of American English which co-evolved during the same era and became predominant by the 1920s.

Burrs (or burls) on a tree.  Burls should not be confused with galls which are small and form along twigs and leaves.  Burls are much larger and form on trunks and branches as an integral part of the tree.  Galls grow outside and are independent of the tree.

The noun burlap (coarse, heavy material made of hemp, jute, etc., used for bagging) dates from the 1690s, the first element probably from the Middle English borel (coarse cloth), from the burel or the Dutch boeren (coarse), although there may have been some confusion with boer (peasant).  The second element, -lap, meant "piece of cloth".  There has been debate about the noun hurly-burly (originally hurlyburly) (commotion, tumult) which in the 1530s was apparently an alteration of the phrase hurling and burling, a reduplication of the fourteenth century hurling (commotion, tumult), from the verbal noun of hurl.  William Shakespeare (1564–1616) had hurly (tumult, uproar) and the early fifteenth century hurling time was the name applied by chroniclers to the period of tumult and commotion around Wat Tyler's (circa 1341–1381; a leader of the 1381 Peasants' Revolt in England) rebellion.   In the early nineteenth century a hurly-house was said to be a "large house in a state of advanced disrepair" and there is presumably some connection with the dialectal Swedish hurra (whirl round) but it’s all quite murky and whether burly in this context is related to burl in the sense of something rough or merely coincidental a rhyme is uncertain.

Burr (pronounced bur)

(1) A rough or irregular protuberance on any object, as on a tree (spelled also as burl).

(2) A small, handheld, power-driven milling cutter, used by machinists and die makers for deepening, widening, or undercutting small recesses (technically called burr grinders which, with a revolving disk or cone with abrasive surfaces are used to smooth burr holes).

(3) In metal fabrication, a protruding, ragged edge raised on the surface of metal during drilling, shearing, punching, or engraving (spelled also as buhr); a blank punched out of a piece of sheet metal.

(4) A washer placed at the head of a rivet.

(5) In ceramics, a fragment of brick fused or warped in firing.

(6) In any form of engineering, to form a rough point or edge on.

(7) In structural phonetics, (1) a pronunciation of the r-sound as a uvular fricative trill, as in certain Northern English dialects (of which the Northumberland is an exemplar) or the retroflex r of the West of England, (2) a pronunciation of the r-sound as an alveolar flap or trill, as in Scottish English or (3) any pronunciation popularly considered rough or non-urban.

(8) To speak with a burr (to speak roughly, indistinctly, or inarticulately) (can be applied neutrally or as a (usually class-loaded) disparagement.  The use to describe the classic Scottish pronunciation is merely descriptive and thus usually neutral although it can be modified such as "...spoke in a strong and almost incomprehensible Scottish burr". 

(9) A whirring sound or rough, humming sound.

(10) In the sense of a broad ring on a spear or tilting lance (placed below the grip to prevent the hand from slipping), a variant of burrow (in obsolete sense: borough) (dating from the sixteenth century and now rare except in historic reference).

(11) In geology, a mass of hard siliceous rock surrounded by softer rock.

(12) A sharp, pointy object, such as a sliver or splinter (regionally specific).

(13) As bur; a seed pod with sharp features that stick in fur or clothing (similar to hayseed).

(13) In anatomy, the ear lobe (archaic).

(14) In zoology, the knot at the bottom of an antler (analogous with the burrs (or burls) on trees.

1375–1425: From the late Middle English burre (possibly related to the Old English byrst (bristle)), burrewez (plural) & buruhe (circle), a variant of brough (round tower), an evolutionary fork of which became the Modern English broch.  It was cognate with the Danish burre & borre (burdock, burr) and the Swedish borre (sea-urchin).  The spelling burr was a variant of the original bur, the addition probably a tribute by the written to the spoken long R sound, the use in phonetics noted from the 1750s, presumably both imitative and associative, the sound being thought of as rough like a bur; the onomatopoeic form may be compared with the French bruire.  The original idea of "rough sound of the letter -R" (especially that common in Northumberland) was later extended to "northern accented speech" in general and was soon integrated into the English class system as one of many class identifiers.  It may be the sound of the word is imitative of the speech peculiarity itself, or it was adapted from one of the senses of bur (the late fourteenth century phrase “to have a bur in (one's) throat” was a figure of speech suggesting the choking sensation or huskiness associated with having something rough caught in the windpipe) but the authoritative Oxford English Dictionary (OED) notes that despite the similarity, the Scottish -r- is a lingual trill, not a true burr.  Burr is a noun & verb, burred & burring are verbs and burrish, burrless & burrlike are adjectives; the noun plural is burrs.

1962 Facel Vega Facel II.

Powered by Chrysler V8s, the Facel Vegas (1954-1964) were France's finest cars of the post-war years and followed the template of the trans-Atlantic hybrids (a powerful (and cheap) US V8, atop a bespoke platform clothed with stylish European coachwork) which flourished until the first oil crisis in 1973 but were in many ways a "cut above most", featuring aluminum panels and stainless steel rather than chrome trim.  The equipment levels were lavish with leather and interior appointments of the highest quality but one curiosity was the extensive "burl walnut" was actually painted metal, so well executed by Facel's craftsmen it demanded a inspection to reveal the nature of the material.  Facel production ended in 1964, the company bankrupted by the flood of warranty claims which flowed from the chronic unreliability of the French-built four-cylinder engine adopted for a smaller range.  The Facellia (1960-1964) was a good idea because the market for such a thing existed but by the time Facel had re-engineered it to used reliable power-plants (a Volvo four and Austin-Healey six), the debts had become unserviceable and the company was doomed.

1969 Lincoln Continental Mark III (plastic wood).

By the mid 1960s Detroit mostly had abandoned the use of timber.  The internal frames went first, only a handful of low-volume specialist vehicles still using the technique when production resumed in the post-war years.  Next to go were the partial-timber bodies, the best known of which were the "woodie" ("woody" once preferred the preferred used in the UK but "woodie" seems now global, presumably because most such surviving wagons were US-built) station wagons although there were also high-priced convertibles and sedans, the latter pair appealing on the basis of the look but those prepared to pay a premium proved a vanishing breed and that was understandable because the manufacturers recommended an annual re-varnishing, a tiresome task and a financial imposition even in an age when unit labor costs were low.  None were left by 1951 and the station wagons followed within a few years as improved production techniques made "all metal construction" a cheaper path to follow.  However, inexplicable though it may have been to the rest of the planet, Americans liked the "woodie" look on pick-ups (some car-based) and especially station wagons so for decades the manufacturers happily supplied the market with "faux woodies" which were created by gluing on 3M's Di-NOC appliqué, framed by fibreglass spars, all components designed to look like timber.  Sometimes with (limited) success and sometimes not, there were even convertibles, an attempt to cash in on any lingering nostalgia for what was around in the days of the administration of Harry S Truman (1884–1972; POTUS 1945-1953).

1970 Lincoln Continental Mark III (real wood).

In the 1960s, as the "real stuff" became rare, "plastic wood" did proliferate in interiors and increasingly it was "faux" rather than "fake" in that often it was obviously phoney although in the higher-priced lines more effort often was taken to try to fool people.  One strange example was Ford's Lincoln Continental Mark III, produced over three seasons with the design imperative having been: "Put a Rolls-Royce grill on a Thunderbird."  Astonishingly profitable because in terms of engineering it was exactly that and not a great deal more, its success inspired Ford to upgrade a few aspects and one change was to replace the plastic wood in the interior with genuine walnut, once part of a tree.  For whatever reason, Ford opted not to emulate Jaguar or Rolls-Royce and use a burl walnut veneer, opting instead for a straight-grain timber which looked almost exactly like the previous year's plastic fittings.  A very close inspection would reveal the truth but it's doubtful many bothered and Ford must have reached the same conclusion, wondering why they bothered.  When the Lincoln Continental Mark IV was released in 1972, it kept the leather but reverted to a plastic wood that blatantly was phoney; over four seasons, it was a great success and is regarded still as the classis "land yacht".

Lindsay Lohan (top left) with luggage, on-location for the filming of Liz & Dick (2012); the car is a Mercedes-Benz 600 (W100, 1963-1981) four-door Pullman.  The early versions of the 600 had the most timber trim.

Buyers of the 600 could choose from a variety of timbers when ordering a 600 although the tale of one customer from the Middle East arriving at the factory with his preferred tree is believed apocryphal.  Not all opted for the burl walnut (Zebrano and the dramatic Macasar Ebony among the choices) and one true eccentric sent his 600 to a French coachbuilder to have all the factory’s timber covered in leather but, because the many other modifications included a vast, single-piece transparent Triplex panel spanning the entire length and width of the roof, the absence of walnut may not immediately be noticed.  Unfortunately, after 1967, the veneer no longer appeared on the instrument binnacle, replaced by a leather covering.  Officially, the explanation was the use had proved vulnerable to sun-damage on the W111 (1961-1971) and W112 (1962-1967) cabriolets which used a similar fitting but production costs were high because, with so many curves and crevasses, applying veneer to the binnacles was labour intensive so although the cabriolets were a small part of the model mix, the decision was taken to standardize a leather covering.  Especially on the W111 coupés & cabriolets the veneered binnacles are much admired and some have been retro-fitted to later models.

The circa 1300 bur (prickly seed vessel of some plants) from the Middle English burre was from a Scandinavian source, either the Danish borre, the Swedish hard-borre or the Old Norse burst (bristle), from the primitive Indo-European bhars.  In the 1610s, it was transferred to refer to a "rough edge on metal" which led ultimately to the use in phonetics and the name give to various tools and appliances.  The noun burstone dates from the late thirteenth century and was an adaptation from the Middle English burre, the stone so-named presumably because of its roughness.  Aaron Burr (1756–1836; VPOTUS 1800–1804) fled after killing a political rival in a duel and plotted to create an independent empire in the western US.  In 1807 he was acquitted on a charge of treason.  To remove a burr (typically in engineering or carpentry) is to deburr (or debur).  The homophones are Bur & brr.  The noun rhotacism dates from 1830 in the sense of “an extensive or particular use of 'r'”, from the Modern Latin rhotacismus, from the Ancient Greek rhotakizein, from rho (the letter -r-), from the Hebrew or Phoenician roth.  A technical adaptation from 1844 was the use to describe the conversion of another sound, usually "s" to "r" (as in Aeolian Greek, which at the end of words changed -s to –r, the related forms being rhotacize & rhotacization.  Regarding timber veneers, the conventional wisdom is that burl is American English while burr is used in the rest of the English-speaking world.  That’s not accurate although burl in this sense is an American innovation from 1868 and probably a useful one.  In the specialized arboreal branch of botany, the words cancer and canker were also once used to describe the growths on trees but these uses seem never to have extended beyond the profession.

1965 Jaguar Mark X (1961-1966, renamed as 420G 1966-1970) with the rare manual gearbox.  The Mark X never realized Jaguar's sales expectations in the US market but it could have been a great success if one potential development path had been followed.

Not all the Mark Xs & 420Gs had the burl walnut finish (many with a bland, honey-colored timber) but they are the most desired.  Like the E-Type (XKE, 1961-1974), the Mark X is a classic example of "1960s Jaguar syndrome": Another few months of development and an additional £40 spent on the production line and most of the problems wouldn't exist.  With the burl timber, the Mark X's interior was one of the most atmospheric of the era but although impressive in appearance, the dashboard's timber top rail obviously was a safety issue (it was a time when the wearing or even fitting of seatbelts wasn't obligatory and airbags were generations away) and when the 420G appeared in October 1966, a full-width (with central clock) padded section had replaced the upper wood; visual appeal sacrificed for safety.

1959 Bentley S1 Continental Two-Door Saloon (Design 7500) by H.J. Mulliner.

Before the marque’s late century revival of differentiation, the Continentals (1952-1965) were regarded by some dedicated aficionados as “the last ‘real’ Bentleys” although there was once a purist faction which held none had been built since Rolls-Royce assumed ownership in 1931 and undertook an elaborated form of “badge-engineering” which, by the mid-1960s, evolved to the point where a Bentley was listed at a few pounds less than the equivalent Rolls-Royce because “it took less time to manufacture the grill”, there being no other difference between the two.  In their day, the Continentals were among the most expensive cars available and being coach-built, although there were “standard body designs” there were many variations and detail differences so it may be no two exactly were alike.  The R-Type Continental (1952–1955) was the one which established the car’s reputation and there’s a high survival rate among the 208 units produced.  The S-Series Continentals (S1, S2, S3, 1955 to 1965) were more numerous with over 1,100 built and while the lines weren’t exactly avant-garde, compared with the contemporary Rolls-Royce models which showed obvious pre-war roots, they were quite rakish.  The interiors too were notable for the burl walnut trim that could be astonishingly ornate, even the instrument bezels sometimes delicately finished with a matching veneer.

Lindsay Lohan behind the wheel of 1972 AMC Javelin SST, photo-shoot for Cosmopolitan magazine's Work Issue, October 2022: dress and boots by Alexandre Vauthier (b 1971), earrings by Carolina Neves (b 1986), ring by Sauer, photographed by Ellen Von Unwerth (b 1954).

By 1972, the US manufacturers largely no longer attempted to make the fake wood look “realistic” and the obviously plastic appliqué became almost a motif in itself.  Like many manufacturers, AMC liked three letter designations and they also had a trim package called “SST” which, according to internal documents, stood for “Super Sports Touring” and not “Stainless Steel Trim” as has been suggested (although use was made of the metal for some of the bright-work so the assumption was not unreasonable).  Doubtlessly AMC expected some positive association in the public mind with the SST (supersonic transport) projects several US aerospace manufacturers were in the era pondering as competition for the Anglo-French Concord(e).  In another specialized field, those in carpentry concerned with fine veneers, there are further distinctions, some defining a burr as an English word meaning a type of growth on a side of a tree which is full of “bud eyes” (the most distinctive pattern associated with expensive veneers) while burl is of US origin and refers to any type of growth on the side of a tree, including burrs.   That would seem to suggest burl would thus include the healing growth over surface damage or broken branches.  Others, notably timber merchants seem most often to regard burls as any highly figured wood with twisted and contorted grain regardless of whether it comes from a growth on the side of a tree, root, stump, or has grown all the way up the trunk, and whether it contains bud eyes or not.  In commerce, this is doubtlessly useful because people buy timber for veneering on the basis of appearance rather than where it happened to grow.  It would of course be useful if one word could be accepted to mean the growth on a tree and the other the harvested timbers from these growths but, being English, such a logical distinction didn't evolve.

Knob

Knob (pronounced nob)

(1) A projecting part, usually rounded, forming the handle of a door, drawer window-frame or the like.

(2) A (usually) ball-shaped part of a handle, lever etc, designed to be grasped by the hand.

(3) In machinery, an almost always rounded control switch that can be rotated on it axis (ie to turn on/off, raise/lower volume etc), designed to be operated by the fingers and visually also emulated in software on screens.

(4) A rounded lump or protuberance on the surface or at the end of something, as a knot on a tree trunk or a fleshy lump or caruncle.

(5) A rounded ornament on the hilt of an edged weapon (the pommel).

(6) In architecture, furniture design etc, an ornamental boss, as of carved work.

(7) In geography, a rounded hill, mountain, a knoll, an elevation on a ridge or morainic ridge.

(8) In botany, a bulb of the garlic plant consisting of multiple cloves in a chunky branch,

(9) In certain military and other institutions, a new recruit.

(10) In hunting & animal husbandry (as knobber), a hart in its second year; a young male deer.

(11) In cooking, a dollop, an amount just larger than a spoonful (used usually in reference to butter and in professional catering there are “butter curlers” which produce an attractive ribbed-curl of butter to be served with the bread-rolls, each curl said to be the equivalent of a “half dollop”.

(12) In slang, the head, thus a person with red hair being a “gainer knob”.

(13) In vulgar slang the head (glans (spongiosum)) of the penis but sometimes used of the whole organ, thus the slang “knobhead” (an unintelligent or contemptible person) and a “literal” synonym of “dickhead”), sometimes used in the forms “knobber” & “knobber”.

(14) In vulgar slang (by extension), to have sexual intercourse with (someone).

(15) In vulgar slang (usually in the plural), a woman's breasts (sometimes with a modifier thought appropriate to the anatomy specifically being referenced).

(16) In vulgar slang, the clitoris.

(17) To produce a knob on (an object).

(18) To furnish with a knob, typically for a functional purpose (adding one to a door, window frame etc) but also as an ornament.

(19) To turn an object into a knob (rare).

(20) In stone cutting, to knock off (excess stone) preparatory to dressing; to knobble; to skiffle.

1350–1400: From the Middle English knobe & knobbe, thought almost certainly from a Scandinavian or German source and probably at least influenced by the Middle Low German knubbe & knobbe (knob; knot in wood; bud), the Middle Dutch knobbe & cnoppe, the Dutch knop (knob, button, bud), the Old Frisian knopp & knapp, the Old High German knopf (bud, pommel of a sword, knot, loop), the Middle High German knospe, the German Knopf (button, knob) & Knospe (bud), the Danish knap (button) & knop (knob, button, bud) and the Old Norse knyfill (short horn).  Most etymologists seem most convinced by it being a variant of the Proto-Germanic knappô (knob, lump) & knuppô (lump, clod), both among the “kn-” words related to knudaną (to knead).  Probably related were the Middle English knap & knappe (small projection, knob (in the sense of “button, tassel, tuft etc”), hill, hilltop etc)), from the Old English cnæp & cnæpp (summit, top), which may in some way be linked with the Old Norse knappr (small projection, knob (in the sense of “button, head of a stick etc”)) (and from which English gained knop), the source again the Proto-Germanic knappô.  The meaning “knoll, isolated round hill” seems first to have appeared in the 1640s and, perhaps surprisingly, no instance of “doorknob” has been found prior to 1829 although the word may have been long in oral use (drawer-knob, window-knob etc all followed).  Knob is a noun & verb, knobless is a noun, knobbed & knobbing are verbs, knoblike & knobby are adjectives; the noun plural is knobs.

Yorkeys Knob, Cairns, Queensland, Australia.

In idiomatic use, the phrase “same to you with knobs (sometimes “brass knobs”) means “the same to you but even more so” (used typically in response to an insult or slight).  A “knob-twiddler” can be an informal term for a technician or console operator whose job entails adjusting electronic devices via knobs but it can also describe anyone whose role seems either unimportant or not particularly demanding.  As machinery and later electronics became an increasingly ubiquitous part of life, so did knobs and as early as the late nineteenth century the humorous “knobologist” had been coined to describe both those designing the system and the “knob-twiddlers” using them; the discipline of design was of course dubbed “knobology” and that remains a core component of ergonomics, exploring imperatives such as placement, size, tactility and labelling, all of which influence the functionality of controls on an instrument as relevant to their application.  The knobologists deeply were implicated in convenient physical switches, knobs and buttons disappearing from cars and re-imagined virtualizations on inconvenient touch-screens.  Such has been the reaction (including the realization the change made driving more accident prone) that the tactile controls are making a welcome comeback.  The now archaic “knob-thatcher” was an affectionate term for a maker of wigs while the more modern “surfer's knob” was slang from the sport, describing a hard bump or nodule on a surfer's knee, shin or ankle, resulting from recurrent contact with their surfboard.  In engineering and metallurgy, “to knobble” was (1) to render a surface with a knobbly finish and (2) to produce wrought iron by treating semi-refined puddled iron on a hearth before shingling, a specialized device in the business being the ominous sounding “knobbling furnace”.

Gay men supporting lesbians at the first “Dyke March”, Washington DC, April 1993.  The sign held by the protester at the far left uses the compound word for which the euphemisms “knob polisher” & “knob-gobbler” were coined.

Because knob was popular slang for penis, a number of derived terms predictably emerged.  A “knob polisher” or “knob-gobbler” was “one who gives fellatio”.  “Knob rot” was a reference to certain sexually transmitted diseases contracted by men, the acute condition “galloping knob rot” describing a rapidly progressing or uncontrollable variant of the condition.  A “knob job” was the act of fellatio.  “Knob cheese” (the terms “cock cheese”, “dick cheese” and (in context) even “cheese”) was vulgar slang for smegma (a whitish sebaceous secretion that collects between the glans penis and foreskin or in the vulva).  “Knob jockey” must however be used with care because it has variously been applied to (1) gay men, (2) promiscuous straight women and (3) promiscuous straight men; context thus matters.

buttons).  In US military slang, buttonology is used of user interfaces generally.

Button porn: Centre console in 1991 Mercedes-Benz 600 SEL (V140).

Although a sight to delight button-nerds, "peak button" unfortunately coincided with the "biodegradable wiring incident" (1991-1995) in which the soy-based insulation for the cables deteriorated some decades before the supplier's projected end-of-life, the issue exacerbated by the taste of soy which would attract rodents and other creatures happy to chew on the stuff for a quick snack.  The basic shape of the gear selector knob dates from one introduced in 1971 in the 350 SL (R107, 1971-1989), the design a product of analysing data from the Swedish government's mandatory post mortems (autopsies) of road-accident fatalities (under Swedish law, such corpses were for 48 hours the property of the state).  What the pathologists' findings revealed was lives could be saved if engineers could devise as a shift lever handle too large to penetrate the eye socket.  While there's an element of the macabre in such research and it wasn't something the factory choose widely to publicize, the design was a classic example of what's called "passive safety".

Interior of Porsche 917K with cool (in both senses of the word) balsa wood shift knob.  The obviously "fake" passenger bucket seat was installed to comply with the rules in sports car racing.

To this day, the myth persists the balsa wood gear-shift knob used in the Porsche 917 was there as a “weight-saving measure”.  While it’s true the small knob was light, the difference between it and the aluminum or magnesium units the company had fitted to earlier race cars would have been so insignificant it’s doubtful it would have equalled a gulp of coffee the driver may or may not have enjoyed.  The stylish timber piece was however not a decorative flourish but a legitimate engineering solution to ameliorate one manifestation of “chronic heat soak”.  In 1969, the 917 was a radical advance which, Dreadnought-like, rendered all other cars in its class instantly obsolescent but the flat-12 engine (Porsche’s first in the configuration) radiated so much heat it was difficult to manage.  In a tradition it would not for decades abandon, Porsche continued to use air-cooling for the engine (which really means “oil cooled” about as much) and it ran hot; between that heat source and the gear level was a unbroken metal path, each component a most efficient conductor.  During endurance racing (some events conducted over 24 hours), cockpit temperatures could reach what doctors would rate as “extreme”.

Close-up of balsa wood gear-shift knob in Porsche 917K.

The metal lever was just one of the sources of this heat and the knob (which sat next to the driver’s knee) needed to be grasped by the driver, often many times a minute; were it to become so hot it caused pain, it would have been safety issue.  Although in 1969 the space-age was at its zenith, the materials which could have made a driver’s gloves close to heat-proof were not then commercially available so they gained much of their protective quality from thickness but the problem was they could be only so thick because a driver needed still to handle a highly-geared steering wheel and operate the many knobs and switches within arm’s reach.  Balsa wood, with its very low thermal conductivity was ideal because while not exactly cool to the touch after a few hours on the track, it never got so hot it felt unpleasant.  It also had adequate strength for its task; a gear-lever knob does not bear structural loads and, being Porsche, it received the same careful attention as every other component, each one precisely machined to exact dimensions before receiving two coats of clear lacquer.  Most variants of the 917 used the balsa wood part although when (as the “Turbo-panzers”) the most powerful of the breed appeared in the Can-Am (for Group 7, unlimited displacement sports cars) a metal knob was fitted, made possible because Group 7 was for open cars and significantly that reduced cabin temperatures.  By the late 1970s when the space age had made available materials (phenolic plastics, composites etc) with superior insulation qualities, the need to resort to a balsa wood knob vanished but the visual appeal remained and in the aftermarket, 917-style knobs remain widely available.

2006 Spyker C8 Laviolette Widebody: Dashboard layout with four-spoke “propeller” steering wheel (left) and toggle switches with nerf-bars (right).  While screens may for certain purposes be better than knobs & switches, the latter often are easier to use and visually, can be most pleasing.

What Porsche did in designing the linkages to the transaxle was dictated by nothing other than usual the design imperatives for racing cars: robustness, reliability, ease of operation and lightness, the use of balsawood as an “anti heat-soak” material wholly in accord and the same parameters were applied by Spyker when designing their distinctive shift mechanism.  Spyker, a boutique operation from the Netherlands, began operation in 1999, the name coming from a Dutch coach-builder that between 1880-1926 would branch out from horse-drawn carriages to automobiles and even aircraft.  Since 2000, between various local difficulties (including bouts of bankruptcy), Spyker has produced a number of high-performance models and while the mechanical specification has always been impressive, what has also drawn attention are the exquisitely finished interiors, the attention to detail (typified by the nerf-bars used to make lawful the use of toggle switches) a delight for those who study such things.  Unfortunately the four-spoke “propeller” steering wheel (a style last seen in volume on the Jaguar XK150 (1957-1961) was eventually judged just too potentially lethal to be granted an exemption from compliance and was replaced with something more accommodating from the Lamborghini parts-bin.

Engineering as art: Gear-shift mechanism, 2006 Spyker C8 Laviolette Widebody (left) and 2007 Spyker C8 Laviolette Targa with, softer, gentler steering wheel (right).

While Spyker’s wonderfully crafted shift mechanism for the rear-mounted ZF transaxle with exposed shafts of stainless steel might seem an affectation, it’s pure functionalism; being a direct mechanical linkage, they provide precise gear-shifting, always a challenge with such a layout (the Porsche 914 (1969-1976) community coined “broomstick in a jar of mayonnaise” to describe the to describe the experience of the earlier "tail-shift" models, the post 1972 "side-shift" build a great improvement from "bad" the "satisfactory").  Spyker’s engineering is thorough and although pure-steel from transaxle to knob, heat-soak along the shaft is said to be minor so there was no need to resort to timber for the knob.

1959 Ford Fairlane Galaxie 500 Sunliner with suicide knob (on steering wheel at 10 o'clock).  This was a generation before "softer, gentler steering wheels".

“Suicide knob” was the most popular name for the device attached to a vehicle’s steering wheel which facilitated easier “single arm steering”.  The idea dated from the days before the almost universal fitting of power-steering and the things became popular in the US in the US in the 1950s and 1960s as even low-priced cars became heavier; for some drivers, they were invaluable when manoeuvring at low speed, especially when reversing.  They were known also as the “necker knob”, “wheel spinner” and “granny knob” but the most correct term was “Brodie Knob”, the name in honor of Steve Brodie (1861–1901), an apparently rather raffish gentleman from New York City who, as a last resort in 1886 after losing everything gambling, staged a stunt in which he jumped off the Brooklyn Bridge (site of a good many suicides), the lure a sum of money he was bet although the details of that are murky.  Mr Brodie anyway survived to collect on the wager and, on the basis of the notoriety gained, began performing other dare-devil acts for even more money.  So the jump from the Brooklyn Bridge was a good career move although the consensus now is it was a cunning stunt (ie a scam), a weighted dummy the real diver with Mr Brodie entering the water from the safety of the shoreline.  In fairness, at least some of his subsequent dangerous stunts were verified by observation and he parlayed his fame into a successful career in business, becoming a noted philanthropist and dying a rich man.

The invention of the suicide knob generally is credited to Joel Thorp of Wisconsin but similar devices had for centuries been in use on land and water.  What Mr Thorpe described in the supporting documents for what was issued as US Patent 2,101,519 STEERING WHEEL SPINNER KNOB (Dec 7, 1937) was an “improvement” of the concept:

“The present invention relates generally to improvements in appliances for facilitating manipulation of the steering wheels of vehicles, and relates more specifically to improvements in the construction and operation of spinner knob attachments co-operable with the peripheral rims of steering wheels or the like in order to effect more convenient and rapid operation of such wheels under certain conditions of use.  Generally defined, an object of my present invention is to provide an improved steering wheel spinner knob which is simple in construction and highly efficient in use.”

A young lady wrapping practiced fingers around the timber shift knob in 1970 Maserati Indy (Tipo 116, 1969-1975).  In the era, it was fashionable in Italian exotica for the knob and steering wheel rim to match (ie in leather or wood).

Although widely used on tractors, heavy transport vehicles and such, it was in the 1950s as cars in the US became heavier the suicide knobs gained popularity and some of that was due to reasons Mr Thorp probably never envisaged.  One receptive market was males aged 17-25 (a crew infamous for many reasons) who found the combination of suicide knob and bench seat made an idea ecosystem, enabling one hand to be used steer the vehicle while the "free" arm could wrap around the girlfriend (or alternative) who affectionately was resting her head on the driver’s shoulder.  In this arrangement, a driver’s attention more easily could be divided between her and the road.  It was also males aged 17-25 who were the core of the hot-rod community which began as a West Coast phenomenon (induced by a critical mass of the right demographic, available disposable income and a good supply of cheap, used cars which easily could be modified as desired) and they found suicide knobs the best way to “do a half donut” (a spin of one’s hot rod through 180^o), the trick being to grip the knob and then suddenly turn the wheel while applying full throttle, resulting in a loud, spectacular maneuver, made the more pleasing for the driver by him having “left his mark” in strips of runner on the road.  This, the hot rodders called “spinning a brodie”, a variant on the earlier “doing a Brodie” (a dangerous or otherwise inadvisable act) which entered the language after the nation-wide publicity which followed Mr Brodie’s alleged leap from the Brooklyn Bridge.  In the era, a Brodie Knob was as essential a piece of equipment as one’s packet of unfiltered Camel cigarettes or pair of fluffy dice hanging from the rear-view mirror.

1962 Maserati 3500 GTi.  Some Maserati 3500 GTs (Tipo 101, 1957-1964) had the unusual feature of having front and rear quarter-vents fitted to the same door; they were opened and closed using knurled, stainless steel knobs.

The dark appellation “suicide knob” was bestowed because (1) the devices came to be associated with accident-prone drivers (the “males aged 17-25” cohort prominent in the statistics) who probably did use the things to engage in “risk-taking” and (2) by virtue of their location (by default affixed to the upper quadrant) on the wheel, they were a genuine danger in accidents and, in an era of non-collapsible steering columns, tales of them penetrating the eye socket, causing irreparable loss of vision and traumatic brain injury, were legion.  The crusading US lawyer Ralph Nader (b 1934) is criticized for much but the contribution his book Unsafe at Any Speed (1965) made to reducing the death toll on the roads cannot be under-estimated and the effect was world-wide because the rest the industry eventually followed the lead of the US legislation which came in the book’s wake.  In the US and elsewhere, change was of course resisted but it came and while it’s not possible to estimate how many deaths and often gruesome injuries the reforms prevented, no one denies it’s a big number.  The suicide knob was one minor casualty of the movement and in road-registered vehicles, in most jurisdictions (although some US states remain permissive), such devices are permitted only for specialized (often low-speed) vehicles and if used by drivers with some disability which precludes the use of conventional controls.

A Hurst Jaws of Life used between 1977-2012 by the fire department in Carlsbad, New Mexico, now on display at the National Museum of American History.

Another to make a life-saving contribution to reducing the road toll was George Hurst (1927-1986; founder of his eponymous company) whose great legacy to humanity was the “Jaws of Life”, a hydraulic cutter he first developed in 1961 after being shocked at how long it sometimes took to extract the driver from the crumpled wreck of a race car.  The great advantage of the “Jaws of Life” was that it worked like a very powerful pair of scissors, avoiding the showers of sparks produced by mechanical saws, always a risk to use in areas where fuel is likely to have been spilled.  The basic design came to be used in hydraulic rescue devices worldwide and quite how many lives have been saved by virtue of its use isn’t known but again, it would be a big number.

Two decades of progress: Shifter knobs for the two-speed Powerglide automatic transmission in 1953 Chevrolet Corvette (left) and a classic spherical shift knob in 1972 Chevrolet Corvette LT1 (available only with a 4-speed manual transmission).  The delicate-looking shifter in the 1953 Corvette seems modest but the location was a world-first for an automatic and was efficient because the location (between the driver’s seat and transmission tunnel) provided the shortest possible path to the linkage; as late as 1964, Chrysler used a similar apparatus for the handful of 1964 300Ks fitted with a manual transmission.  One amusing geometric quirk is the three-dimensional sphere and two dimensional circle share the same definition: A shape in which all points are equally distant from the centre. 

However, before the Jaws of Life, Hurst was already famous in the vibrant sub-culture which was at the times also known for its propensity to purchase and install suicide knobs.  Hurst produced “shifters” which were the assemblies connected to a transmission, used by the driver to “change gears” and they proved instantly popular which may seem strange given every manufacturer at the time included a shifter with every vehicle.  However, beginning in the late 1930s, the US manufacturers had begun moving from centrally located, floor-mounted levers to units on the steering column because it made for better packaging efficiency in the cabins, then optimized for bench-seats with three-astride seating.  That move achieved the goal but with the linkage between lever and gear-changing mechanism now longer and making more turns, some precision in the shifting was lost and column shifting (the once almost universal “three on the tree”) was less conducive to an enthusiastic driving style (such as that of the “suicide knob equipped” crowd).  It was in the 1950s the taste for floor-shifts like those in European sports cars began to gain critical mass and even though the 1953 Chevrolet Corvette was hardly a sports car in the tradition of MGs, Fiats and such, it’s notable Chevrolet from the start installed a floor shift for the (two-speed!) Powerglide automatic transmission; it may not have been a sports car with a “four-on-the-floor” but it had a floor-shift so there was that.  Automatic transmissions in mass-produced cars was then something of a novelty barely a decade old and the Corvette’s floor shift was apparently a world-first.

A butter curler producing curls.  Generally, the curlers come in large and small, respectively producing a curl notionally equivalent to a dollop or a knob (half-dollop).  In the kitchen however, knobs and dollops are what the chef decides they are.

Four-speed manual transmissions began to appear in Detroit-made cars in the late 1950s and within half a decade George Hurst’s shifters were close to obligatory for any racer (authorized or not) seeking “street cred” and it wasn’t a confected image, the Hurst shifters demonstratively superior without being excessively expensive.  So stellar did their reputation become even GM (General Motors) relaxed their long-standing ban on other brand-names being associated with their products and made a feature of one being standard equipment of the 1964 Pontiac GTO, the car credited with being “the first muscle car” and such was the success in 1965 the shifter’s handle was even permitted to be embossed: HURST.  Soon, other manufacturers actively were seeking co-productions.  George Hurst’s path to market domination was shockingly simple and might have come from a textbook: (1) a perfected design, (2) skilful engineering in development, (3) high quality in production and (4) an attractive price, a combination of elements with great appeal for buyers and manufacturers alike.

Hurst’s dual-gate automatic transmission “His and Hers” shifter with conventional apparatus “for the automatic minded little lady” and a performance-oriented configuration offering manual control for the “man who really wanted a 4-speed standard stick but bought this extra just for her.”  Note the unfamiliar shift pattern, the now universal PRNDL not an industry standard until 1965, the year before it was demanded by regulations.  From the early days of automatic transmissions in the 1940s, reverse had been directly adjacent to Low, allowing drivers more easily to emulate what was done with manual transmissions when a “rocking” was being induced to try to free a vehicle from mud or snow.  It was a quirk of the age and, because reliability was not then what decades later came to be expected, the early transmissions included a second (rear) fluid pump to permit push/tow/hill starts.  Probably, not many much dwelt on the shape of the knob Hurst put atop the His and Hers” shifter but in geometry it would be described as an oblate spheroid with two parallel planar truncations.  Now easily modelled in software rendered with a 3D printer, perfecting a shape like this for production used to absorb much time on the drawing board and in the creation of prototypes.  A spheroid is an ellipsoid generated by rotating an ellipse about one of its principal axes which, if “stretched” along one axis becomes a prolate spheroid (ie elongated and something like a rugby ball).  If slightly flattened along the axis of rotation, it’s an oblate spheroid (like planet Earth which isn’t quite a pure sphere) but the His & Hers knob, having a slight elongation along the shifter’s axis, is closest to a prolate spheroid.  The planar-truncation (ie sliced by two parallel planes) created the (left & right) flat faces and the knob can thus be described as a “truncated ellipsoid” or “truncated prolate spheroid” but anyone wishing to out-nerd the rest would probably coin something like “biaxial ellipsoid with parallel planar truncations”.

It was early in the era of second-wave feminism (1960s-1980s) that George Hurst made his brief foray into marriage guidance counselling.  First-wave feminism (1895-1950s) is sometimes called the “de jure” or “structural” period because the focus was on legal issues such as women's suffrage, property rights and political candidacy but, in the West, an early victory was overcoming any opposition to women being granted driver’s licences.  Attitudes however evolved not wholly in parallel with legal rights and even today, among some, the view persists it’s men who are focused on performance and speed while women value vehicles using other criteria.  Impressionistically, that stereotype is not wholly without foundation but, since second wave feminism reset the rules, it’s no longer possible to run advertising perpetuating the notion.  The “His and Hers” shifter worked with a key-lock which enabled the husband to ensure only he could use the “manual override” feature and the idea in recent decades has been revived although this time the target of the lockout includes one’s (presumably male) children and any concierge or attendant who might be entrusted with parking one’s car.

Advertisement for Hurst's "custom knobs" (left) and the famous Hurst "pistol grip shifter" in 1970 Plymouth 'Cuda 440+6 (ie 3 x 2bbl carburetors) (right).

The magic of Hurst’s shifters was in the mechanism but, just as for computer users the mouse and keyboard assume great importance because it’s by touching these relatively simple pieces of hardware that use can be made of the machine’s more sophisticated internals, it was the shifter’s knob which was a driver’s most intimate connection with the transmission.  Although in the art deco era there had been some lovely detailing, it wasn’t until the 1960s most conceptually moved beyond beyond “variations on a theme of sphere” and Hurst was among the manufacturers to explore shapes and substances.  There were “T-Handles” (which, usually as "T-Bars", were for decades popular around the world for automatics) and “Horseshoes” which attracted admiring glances but didn’t catch on and any number of novelty items including billiard balls (the “8 ball” predictably a favourite of the V8 crowd) and scale models of this and that including human body parts such as the skull and mammary gland.  Knobs could be of plastic, wood or various metals and came in designer colors, velvet coatings a nice touch of the 1960s.  The most fetishized of the muscle car era however was Hurst’s “Pistol Grip Shifter” which did what it said on the tin: it gave the user the feeling of holding a handgun.  In the 1960s, gun culture in the US hadn’t yet become what it is today (as now defined, the first “mass-shooting” didn’t happen until 1966) but it was still a place with a lot of firearms.  However, despite the potential implications, when in 1970 Chrysler made one standard equipment on the 1970 Plymouth ‘Cuda, one brochure made mention of the device only with the bland: “...a convenient pistol grip”.  For a corporation which called the Cuda’s hood scoop the I.Q.E.C.A.G. (Incredible Quivering Exposed Cold Air Grabber), it seemed a missed opportunity though it didn’t have much linguistic luck with I.Q.E.C.A.G., customers and everybody else deciding it was a “shaker”.

Ginger knob Lindsay Lohan in The Parent Trap, approaching 23 Egerton Terrace (tagged 7 for the film), Knightsbridge, SW3, London (the front door with a knob, left) and standing next to a door with a handle (right), from a photo-shoot by Rebecca Lader.

Architecturally, the choice between specifying door levers or door knobs is often one of mere preference or aesthetic conformity but for public or commercial buildings, some regulatory authorities now mandate the use of levers because typically they are easier to use for those with disabilities (especially if hand-mobility is limited) as they demand less dexterity.  Additionally, being circular and often highly polished, knobs can be hard to use with wet hands so that’s a consideration in kitchens, bathrooms and such; nor do young children find them as convenient as a handle.  So, all that would seem to make a compelling case for the handle but for domestic use, there’s one quirky consideration some may wish to include when making the choice.  While there are verified cases of cats and dogs learning to open doors using a handle, no pet has yet been observed mastering the turning of a door knob; while a rare problem, the chance of one’s cat or dog opening door using a lever is not zero and, because houses tend to use the same style of lever throughout, once they have learned to open one door, they’ve really learned to open all.  If it’s a concern, the good news is most doors are adaptable for either so replacing a lever with a knob does not usually require the door being replaced.