Quartervent
(pronounced kwawr-ter-vent)
A small, pivoted, framed
(or semi-framed) pane in the front
or rear side-windows of a car, provided to optimize ventilation.
1930s: The
construct was quarter + vent. Dating
from the late thirteenth century, the noun quarter (in its numerical sense) was
from the Middle English quarter, from
the Anglo-Norman quarter, from the Old
French quartier, from the Latin quartarius (a Roman unit of liquid
measure equivalent to about 0.14 litre).
Quartus was from the primitive
Indo-European kweturtos (four) (from which the Ancient Greek gained τέταρτος
(tétartos), the Sanskrit चतुर्थ (caturtha), the Proto-Balto-Slavic ketwirtas and the Proto-Germanic fedurþô). It was cognate
to quadrus (square), drawn from the sense
of “four-sided”. The Latin
suffix –arius was from the earlier -ās-(i)jo- , the construct being -āso- (from the primitive Indo-European -ehso- (which may be compared with the Hittite
appurtenance suffix -ašša-) + the relational
adjectival suffix -yós (belonging to). The suffix (the feminine –āria, the neuter -ārium)
was a first/second-declension suffix used to form adjectives from nouns or
numerals. The nominative neuter form – ārium (when appended to nouns), formed
derivative nouns denoting a “place where stuff was kept”. The
Middle English verb quarteren, was derivative
of the noun. Dating from the mid
fourteenth century, vent was from the Middle English verb venten (to furnish (a vessel) with a vent), a shortened form of the
Old French esventer (the construct
being es- + -venter), a verbal derivative of vent, from the Latin ventus (wind), in later use derivative
of the English noun. The English noun
was derived partly from the French vent,
partly by a shortening of French évent (from
the Old French esvent, a derivative
of esventer) and partly from the English
verb. The hyphenated form quarter-vent
is also used and may be preferable. Quarter-vent
is a noun; the noun plural is quarter-vents.
In use, the action of using the function provided by a quarter-vent
obviously can be described with terms like quarter-venting or quarter-vented but
no derived forms are recognized as standard.

1959 Cadillac Eldorado Biarritz.
Like almost all US passenger cars, the post-war Cadillacs all had quarter-vents (“vent
windows” or “ventiplanes” to the Americans) and on the most expensive in the range they were controlled by an electric motor, a feature optional on the lesser models. This was a time when the company's slogan “Standard
of the World” really could be taken seriously. In
1969, with General Motors (GM) phasing in flow-through ventilation,
Cadillac deleted the quarter-vents, meaning purchasers no longer had to decide
whether to pay the additional cost to have them electrically-activated (a US$71.60
option on the 1968 Calais and De Ville). GM's early implementation of flow-through ventilation was patchy so the change was probably premature but by 1969 the system was perfected and as good as their air-conditioning, famous since the 1950s for its icy blast.
The now
close to extinct quarter-vents were small, pivoted, framed (or semi-framed) panes
of glass installed in the front or rear side windows of a car or truck; their
purpose was to provide occupants with a source of ventilation, using the
air-flow of the vehicle while in motion.
The system had all the attributes of other admirable technologies (such
as the pencil) in that it was cheap to produce, simple to use, reliable and
effective in its intended purpose.
Although not a complex concept, GM in 1932 couldn’t resist
giving the things an impressively long name, calling them “No Draft Individually Controlled Ventilation” (NDICV being one of
history’s less mnemonic initializations).
GM’s marketing types must have prevailed because eventually the snappier
“ventiplanes” was adopted, the same process of rationality which overtook
Chrysler in 1969 when the public decided “shaker” was a punchier name for their
rather sexy scoop which, attached directly to the induction system and, protruding
through a carefully shape lacuna in the hood (bonnet), shook with the engine,
delighting the males aged 17-39 to whom it was intended to appeal. “Shaker” supplanted Chrysler’s original “Incredible Quivering Exposed Cold Air
Grabber” (IQECAG another dud); sometimes less is more. Adolf Hitler (1889-1945; Führer (leader) and
German head of government 1933-1945 & head of state 1934-1945) suggested a
good title for his book might be Viereinhalb
Jahre [des Kampfes] gegen Lüge, Dummheit und Feigheit (Four and a Half
Years of Struggle against Lies, Stupidity and Cowardice) but his publisher
thought that a bit ponderous and preferred the more succinct Mein Kampf: Eine Abrechnung (My
Struggle: A Reckoning) and for publication even that was clipped to Mein Kampf. Unfortunately, the revised title was the best
thing about it, the style and contents truly ghastly and it's long and
repetitious, the ideas within able easily to be reduced to a few dozen pages
(some suggest fewer but the historical examples cited for context do require
some space).

The baroque meets mid-century modernism: 1954 Hudson Italia by Carrozzeria Touring.
Given how
well the things worked, there’s long been some regret at their demise, a
process which began in the 1960s with the development of “through-flow
ventilation”, the earliest implementation of which seems to have appeared in
the Hudson Italia (1954-1955), an exclusive, two-door coupé co-developed by Hudson
in Detroit and the Milan-based Italian coachbuilder Carrozzeria Touring. Although some of the styling gimmicks perhaps
haven’t aged well, the package was more restrained than some extravagances of
the era and fundamentally, the lines were well-balanced and elegant. Unfortunately the mechanical underpinnings
were uninspiring and the trans-Atlantic production process (even though Italian
unit-labor costs were lower than in the US, Touring’s methods were
labor-intensive) involved two-way shipping (the platforms sent to Milan for
bodies and then returned to the US) so the Italia was uncompetitively
expensive: at a time when the bigger and more capable Cadillac Coupe de Ville
listed at US$3,995, the Italia was offered for US$4,800 and while it certainly
had exclusivity, it was a time when there was still a magic attached to the
Cadillac name and of the planned run of 50, only 26 Italias were produced
(including the prototype). Of those, 21
are known still to exist and they’re a fixture at concours d’élégance (a sort
of car show for the rich, the term an unadapted borrowing from the French (literally
“competition of elegance”) and the auction circuit where they’re exchanged
between collectors for several hundred-thousand dollars per sale. Although a commercial failure (and the Hudson
name would soon disappear), the Italia does enjoy the footnote of being the first
production car equipped with what came to be understood as “flow-through
ventilation”, provided with a cowl air intake and extraction grooves at the top
of the rear windows, the company claiming the air inside an Italia changed
completely every ten minutes. For the
quarter-vent, flow-through ventilation was a death-knell although some lingered
on until the effective standardization of air-conditioning proved the final
nail in the coffin.

1965 Ford Cortina GT with eyeball vents and quarter-vents.
The car which
really legitimized flow-through ventilation was the first generation
(1962-1966) of the Ford Cortina, produced over four generations (some claim it
was five) by Ford’s UK subsidiary between 1962-1982). When the revised model displayed at the Earls
Court Motor Show in October 1964, something much emphasized was the new “Aeroflow”,
Ford’s name for through-flow ventilation, the system implemented with “eyeball”
vents on the dashboard and extractor vents on the rear pillars. Eyeball vents probably are the best way to do through-flow
ventilation but the accountants came to work out they were more expensive to install
than the alternatives so less satisfactory devices came to be used. Other manufacturers soon phased-in similar
systems, many coining their own marketing trademarks including “Silent-Flow-Ventilation”,
“Astro-Ventilation” and the inevitable “Flow-thru ventilation”. For the Cortina, Ford took a “belt &
braces” approach to ventilation, retaining the quarter-vents even after the “eyeballs”
were added, apparently because (1) the costs of re-tooling to using a single
pane for the window was actually higher than continuing to use the
quarter-vents, (2) it wasn’t clear if there would be general public acceptance
of their deletion and (3) smoking rates were still high and drivers were known
to like being able to flick the ash out via the quarter-vent (and, more regrettably,
the butts too). Before long, the
designers found a way economically to replace the quarter-vents with “quarter-panes”
or “quarter-lights” (a fixed piece of glass with no opening mechanism) so early Cortinas
were built with both although in markets where temperatures tended to be higher
(notable South Africa and Australia), the hinged quarter-vents remained standard
equipment. When the Mark III Cortina
(TC, 1970-1976) was released, the separate panes in any form were deleted and
the side glass was a single pane.

Fluid dynamics in action: GM's Astro-Ventilation.
So
logically a “quarter-vent” would describe a device with a hinge so it could be
opened to provide ventilation while a “quarter-pane”, “quarter-light” or “quarter-glass”
would be something in the same shape but unhinged and thus fixed. It didn’t work out that way and the terms
tended to be used interchangeably (though presumably “quarter-vent” was most
applied to those with the functionality.
However, the mere existence of the fixed panes does raise the question
of why they exist at all. In the case or
rear doors, they were sometimes a necessity because the shape of the door was
dictated by the intrusion of the wheel arch and adding a quarter-pane was the
only way to ensure the window could completely be wound down. With the front doors, the economics were
sometimes compelling, especially in cases when the opening vents were optional
but there were also instances where the door’s internal mechanisms (the door
opening & window-winding hardware) were so bulky the only way to make stuff
was to reduce the size of the window.

1976
Volkswagen Passat without quarter-vents, the front & rear quarter-panes fixed.
The
proliferation of terms could have come in handy if the industry had decided to
standardize and the first generation Volkswagen Passat (1973-1980) was illustration
of how they might been used. The early
Passats were then unusual in that the four-door versions had five separate
pieces of side glass and, reading from left-to-right, they could have been
classified thus: (1) a front quarter-pane, (2) a front side-window, (3) a rear
side-window, (4) a rear quarter-pane and (5) a quarter-window. The Passat was one of those vehicles which
used the quarter-panes as an engineering necessity to permit the rear
side-window fully to be lowered. However
the industry didn’t standardize and in the pre-television (and certainly pre-internet)
age when language tended to evolve with greater regional variation, not even
quarter-glass, quarter-vent, quarter-window & quarter-pane were enough and the
things were known variously also as a “fly window”, “valence window”, “triangle
window” and “auto-transom”, the hyphen used and not.

PA Vauxhall
Velox (1957-1962): 1959 (left) and 1960 (right). The one-piece rear window was introduced as a
running-change in late 1959.
Before
flow-through ventilation systems and long before air-conditioning became ubiquitous,
quarter-vents were the industry standard for providing airflow to car interiors
and it was common for them to be fitted on both front and rear-doors and frequently, the rear units were fixed
quarter-panes, there to ensure the side windows fully could be lowered. A special type of fixed quarter-pane were those used with rear windows, originally an
economic imperative because initially it was too expensive to fabricate one
piece glass to suit the “wrap-around styles becoming popular. Improved manufacturing techniques let the US industry
by the early 1950s overcome the limitations but elsewhere, the multi-piece
fittings would continue to be used for more than a decade.

1957 Mercury Turnpike Cruiser (left), details of the apparatuses above the windscreen (centre) and the Breezeaway rear window lowered (right)
The 1957 Mercury Turnpike Cruiser was notable for (1) the truly memorable model name, (2) introducing the “Breezeway" rear window which could be lowered and (3) having a truly bizarre arrangement of “features” above the windscreen. Unfortunately, the pair of “radio aerials” protruding from the pods at the top of the Mercury’s A-pillars were a mere affectation, a “jet-age” motif decorating what were actually air-intakes.

Brochure for 1957 Mercury Turnpike Cruiser promoting, inter-alia, the Breezeway retractable rear window.
A three-piece
construction was however adopted as part of the engineering for the “Breezeway”,
a retractable rear window introduced in 1957 on the Mercury Turnpike Cruiser. It was at the time novel and generated a lot
of publicity but the concept would have been familiar to those driving many
roadsters and other convertibles which had “zip-out” rear Perspex screens,
allowing soft-top to remain erected while the rear was open. Combined with the car’s quarter-vents, what
this did was create the same fluid dynamics as flow-through ventilation. The way Mercury made the retractable glass
work was to section the window in a centre flat section (some 80% of the total width),
flanked by a pair of fixed quarter-panes.
After the run in 1957-1959, it was resurrected for use on certain Mercury
Montclairs, Montereys and Park Lanes.

1958 (Lincoln) Continental Mark III Convertible (with Breezeway window). The platform was unitary (ie no traditional chassis) which with modern techniques easily was achievable on the sedans and coupes but the convertible required so much additional strengthening (often achieved by welding-in angle iron) that a Mark III Convertible, fueled and with four occupants, weighed in excess of 6000 lb (2720 kg).
Ford must
have been much taken with the feature because it appeared also on the
gargantuan “Mark” versions of the (Lincoln) Continentals 1958, 1959 & 1960, dubbed
respectively Mark III, IV, & V, designations Ford shamelessly would begin
to recycle in 1969 because the corporation wanted the new Mark III to be
associated with the old, classic Continental Mark II (1956-1957) rather than
the succeeding bloated trio. The “Breezeway”
Lincolns also featured a reverse-slanted rear window, something which would
spread not only to the Mercurys of the 1960s but also the English Ford Anglia (105E,
1959-1968) and Consul Classic (1961-1963) although only the US cars ever had
the retractable glass. The severe
roofline was used even on the convertible Continentals, made possible by them
sharing the rear window mechanism used on the sedan & couple, modified only
to the extent of being retractable into a rear compartment.

1967
Chevrolet Camaro 327 with vent windows (left), 1969 Chevrolet Camaro ZL1
without vent windows (centre) and Lindsay Lohan & Jamie Lee Curtis (b 1958)
in Chevrolet Camaro convertible during filming of the remake of Freaky Friday
(2003) (provisionally called Freakier Friday), Los Angeles, August 2024.
The Camaro from the film set can be identified as a 1968 or
1969 model because the vent windows were deleted from the range after 1967 when
“Astro-Ventilation” (GM’s name for flow-through ventilation) was added. In North American use, the devices typically
are referred to as “vent windows” while a “quarter light” is a small lamp
mounted (in pairs) in the lower section of the front bodywork and a “quarter-vent” is some sort of (real or fake) vent installed somewhere on the quarter
panels. As flow-through ventilation became standardized and air-conditioning installation rates rose, Detroit abandoned the quarter-vent which the industry like to do because their absence lowered the cost of production. On the small, cheap Ford Pinto (1971-1980) the removed feature saved a reported US$1.16 per unit but, being small and cheap, air-conditioning was rarely ordered by Pinto buyers which was probably a good thing because, laboring under the 1970s burdens of emission controls, the weight of impact-resistant bumper bars and often an automatic transmission a Pinto was lethargic enough with out adding power-sapping air-conditioning. Responding (after some years of high inflation) to dealer feedback about enquires from Pinto customers indicating a interest in the return of quarter-vents, Fords cost-accountants calculated the unit cost of the restoration would be some US$17.

Ford
Australia’s early advertising copy for the XA Falcon range included publicity shots
both with and without the optional quarter-vents (left) although all sedans & station wagons had the non-opening, rear quarter-panes, fitted so the side window completely could be lowered. One quirk of the campaign was the first shot
released (right) of the “hero model” of the range (the Falcon GT) had the
driver’s side quarter-vent airbrushed out (how “Photoshop jobs” used to be done), presumably because it was thought to clutter a well-composed picture. Unfortunately, the artist neglected to defenestrate the one on
the passenger’s side.
Released in
Australia in March 1972, Ford’s XA Falcon was the first in the lineage to
include through-flow ventilation, the previously standard quarter-vent
windows moved to the option list (as RPO (Regular Production Option) 86). Because Australia often is a hot place and many Falcons
were bought by rural customers, Ford expected a high take-up rate of
RPO 86 (it was a time when air-conditioning was expensive and rarely ordered) so
the vent window hardware was stockpiled in anticipation. However, the option didn’t prove popular but
with a warehouse full of the parts, they remained available on the subsequent
XB (1973-1976) and XC (1976-1979) although the take-up rate never rose, less the 1% of each range so equipped and
when the XD (1979-1983) was introduced, there was no such option and this
continued on all subsequent Falcons until Ford ceased production in Australia
in 2016, by which time air conditioning was standard equipment.

Great
moments in tabloid journalism: Sydney's Sun-Herald, Sunday 25 June, 1972. The Sun-Herald was then part of the Fairfax group, proving Rupert Murdoch (b 1931) can't be blamed for everything.
The
infrequency with which RPO 86 was ordered has been little noted by history but on
one car with the option the fixtures did become a element which enabled a owner to claim
the coveted “one-of-one” status. In
August 1973, near the end of the XA’s run, with no fanfare, Ford built about
250 Falcons with RPO 83, a bundle which included many of the parts intended for
use on the stillborn GTHO Phase IV, cancelled (after four had been built) in 1972
after a newspaper generated one of their moral panics, this time about the “160
mph super cars” it was claimed the local manufacturers were about to
unleash and sell to males ages 17-25. Actually, none of them were quite
that fast but the tabloid press have never been too troubled by facts and the
fuss spooked the politicians (it's seldom difficult to render a "minister horrified"). Under pressure, Holden cancelled the LJ Torana V8,
Ford the GTHO Phase IV and Chrysler reconfigured it's E55 Charger 340 as a luxury coupé, available only with an automatic transmission and no high-performance modifications.

A Calypso Green
1972 Ford XA Falcon GT which is the only one produced with both RPO 83 (a
(variably fitted) bundle of parts left-over from the aborted GTHO Phase IV project)
and RPO 86 (front quarter-vent windows). In the collector market they're referred to usually as "RPO83 cars".
So in 1973 Ford's warehouse still
contained all the parts which were to be fitted to the GTHO Phase IV so they’d be
homologated for competition and although the rules for racing had been changed
to ensure there was no longer any need to produce small batches of “160 mph (257
km/h) super cars”, Ford still wanted to be able to use the heavy-duty bits and pieces in
competition so quietly conjured up RPO 83 and fitted the bundle on the assembly
line, most of the cars not earmarked for allocation to racing teams sold as “standard”
Falcon GTs. Actually, it’s more correct
to say “bundles” because while in aggregate the number of the parts installed
was sufficient to fulfil the demands of homologation, not all the RPO 83 GTs
received all parts so what a buyer got really was “luck of the draw”; with nobody being charged extra for RPO 83, Ford didn’t pay too much attention to the details of the installations and many who purchased one had no idea the parts had been included, the manual choke's knob the only visually obvious clue. Ford made no attempt to publicize the existence of RPO 83, lest the tabloids run another headline. It’s certain 250 RPO 83 cars were built (130 four-door
sedans & 120 two-door Hardtops) but some sources say the breakdown was 131
/ 121 while others claim an addition nine sedans were completed. Being a genuine RPO 83 car, the Calypso Green
GT attracts a premium and while being only RPO 83 with quarter-vent windows is
not of any great significance, it does permit the prized “one-of-one” claim and
not even any of the four GTHO Phase IVs built (three of which survive) had
them. In the collector market, the “one-of-one”
status can be worth a lot of money (such as a one-off convertible in a run of
coupés) but a Falcon’s quarter-vents are only a curiosity.

The Bathurst 1000 winning RPO83 Falcon GTs, 1973 (left) & 1974 (right).
All else being equal, what makes one RPO83 more desirable than another is if it was factory-fitted with all the option's notional inventory and most coveted are the ones with four-wheel disk brakes. Because the project was focused on the annual endurance event at Bathurst's high-speed Mount Panorama circuit, the disks were as significant as an additional 50 horsepower and a few weeks before the RPO 83 run they'd already been fitted to the first batch of Landaus, which were Falcon Hardtops blinged up with hidden headlights, lashings of leather, faux woodgrain and a padded vinyl roof, all markers of distinction in the 1970s and, unusually, there was also a 24 hour analogue clock. Essentially a short wheelbase, two-door LTD (which structurally was a Falcon with the wheelbase stretched 10 inches (250 mm) to 121 (3075 mm)), the Landau was not intended for racetracks but because it shared a body shell and much of the running gear with the Falcon GT Hardtops, Ford claimed Landau production counted towards homologation of the rear disks. Fearing that might be at least a moot point, a batch were installed also on some of the RPO83 cars and duly the configuration appeared at Bathurst for the 1973 event, their presence of even greater significance because that was the year the country switched from using imperial measures to metric, prompting the race organizers to lengthen the race from 500 miles (804 km) to 625 (1000), the Bathurst 500 thus becoming the Bathurst 1000. RPO83 Falcon GTs won the 1973 & 1974 Bathurst 1000s.