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Патент USA US3033989

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May 8, 1962
w. D. cAHlLL
3,033,979
OVERLAPPING AND INTERLOCKING LoUvERs FOR LIGHT FIXTURES
Filed Sept. 13, 3.957
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tween 17 and 19 on each of long sides 12 and 13 and
covers the lower half of the ends of» strips 21 and the
3,033,979
OVERLAPPING AND INTERLÜCKING LÜUVERS
FÜR LIGHT FKTURES
William D. Cahill, Chicago, Ill., assigner, by mesne as
signments, to Curtiss-Electro Lighting, luc., a corpora
spaces therebetween.
Filed Sept. 13, 1957, Ser. No. 683,820
5 Claims. (Cl. 24d-_9)
My invention relates to light diffusing plastic louvers
for light fixtures and luminous ceilings, which may be
associated together in any length without visible attach~
ing means and which overlap and interlock.
Another object of my invention is to provide overlap
ping and interlocking louvers, which need no cross bars,
have inwardly cut corner notches 25 and 26.
A adjacent louver referred to as 2-7 may be formed as
heretofore set forth with the following differences: This
10 adjacent louver 27 has its marginal bands 1‘6 and 18 cov
or other extraneous and visible attachments.
To supply louvers for forming a light lfixture or lumi
nous ceiling of any size by the mere attachment of lou
vers of standard size. Unlike any other suspended ceil
ing, ythe architect can utilize my overlap and interlock lou- -
vers in a simple aesthetic linear designed ceiling -without
visible grid crcssbars across the width. Through their
use not only a-re crossbars eliminated but the standard
architectural module of 2 foot widths is used so -that the
length can be 2 feet or 2,000 feet.
To create louvers having overlapping and reverse in
terlocking features.
This prevents sidewise misalign
,
The overlapping and interlocking construction of my
louvers will straighten out slight warping and retain the
louvers in straight aligned position.
In attaching of my louvers together, they yhave the
appearance of a single piece, with greater resul-tant sale
«
At 17 and 19, strips 21 and «bands 16 and 18 have in
wardly cut corner notches 23 and 24. The outer ends of
cach central marginal band 22 and connecting strip 21
tion of Illinois
ment.
3,033,979
Patented May S, 19§2
ering the lower half of the ends of strips 21 and the spaces
therebetween, and its central marginal band 22 covering
the upper half of the ends of strips 21 and the spaces be
tween 17 and 19.
When louver 27 is to ybe attached to louver 20 central
marginal band 22 of louver 27 is positioned on yftop of
central marginal band 22 of louver 20, with corner notch
es 25 and 26 of louver 27 engaging corner notches »23 and
24 of louver 2li. This positions marginal band 16 and 18
of louver 29 against and on top of marginal band 16 and
18 of louver 27 .
Further louvers 2li and 27 may be similarly attached to
each other until a fixture or luminous ceiling of desired
size is obtained. ‘Means are then provided for attaching
the fixture or luminous ceiling so formed to the ceiling
of a room and fluorescent elect-ric or other light yare pro
vided lfor supplying illumination to be distributed or dif
fused by the fixture or luminous ceiling.
.
It is also to be noted that by turning over louver 20,
louver 27 is obtained so that louvers 10 are reversible.
Having thus `described my invention, I claim;
l. A louver for light fix-tures comprising a rectangular
body member having a plurality oi crossing strips form
ing a plurality of longitudinally and laterally spaced
My invention also contemplates ease of installation and CD Ul cubes with open marginal ends, said body member having
attachment of my louvers by any one without special
spaced `sides vand spaced ends, a marginal Iband beginning
skill land such other objects, advantages and capabilities
short of center on one of said sides and extending around
ability and marketability.
as will later more fully appear, and which are inherently
one end to a point short of center on the other side, an
possessed by my invention.
other marginal band beginning shont of the other side of
While i have shown in the accompanying drawings a 40 center on said side and extending around the other end
preferred embodiment or" my invention, yet it is to be
understood that the same is susceptible of modiiication
to a point short of center on the other side, said marginal
bands covering the upper half of the marginal ends of
said strips, a central band covering the lower half of the
invention.
marginal
ends of said strips and extending 'between said
Referring -to the drawings, FIG. 1 is a plan view of two
marginal bands, said marginal bands at their ends and
of my louvers in assembled position; FIG. 2 is a broken
the marginal open ends of said strips at their meeting
edge view; FIG. 3 is a prospective view lof two of my lou
having cooperating notches and said central bands at
vers about to be joined; FIG. 4 is a plan view of my
their ends also having cooperating notches at their meet
coupled louvers, and FIG. 5 is a detailed sectional view
the marginal open ends of said strips.
of the louvers partly separated and showing the align 50 ing2.with
A louver for light Iixtures comprising a rectangular
ment on line 5_5 of FIG. l.
body member having a plurality of crossing strips form
The embodiment selected to illustrate my invention in
ing a plurality of longitudinally and laterally spaced cubes
cludes two or more louvers adapted to overlap and inter
with open marginal ends, said body member having
lock without visible attachments to form the light diiîus
spaced sides and spaced ends, a marginal band beginning
ing portions of -a lighting fixture or luminous ceiling.
55 short of center on one of said sides and extending around
My louvers 1t) are formed of plastic, glass or other
one end to a point short of center on the other side, an
suit-able material for diffusing ñuorescent electric light or
other
marginal band beginning short of the other side of
the like positioned adjacent them. My louvers have a
center on said side and extending around the other end.
Ibody portion 11 preferably formed of spaced crossed
strips forming a plurality of squares or cube portions 60 to a point short of center on the other side, said marginal
bands covering the lower half of the marginal ends of
with open ends. Each louver has spaced long sides 12
said strips, a centralband cove-ring the upper half of the
and 13 and spaced ends 14 and 15.
marginal ends of said strips and extend-ing between said
vA marginal `ban-d 16 extends around one end 14 of the
marginal bands, said marginal bands at their ends and
louver and terminates at 1'7 short of the center of each
of said long sides 12 and 13. Another marginal band 18 65 the marginal open 'ends of said strips at their meeting
having cooperating notches and said centra-l bands at
extends around the other end 15 and terminates at 19
their ends also having cooperating notches at their meet
short of the center of each of said long sides 12 and 13.
ing with the marginal open ends of said strips.
rlihe distance between 17 and 14 is the same as the dis
tance between 19 and 15.
3. A pair of interlocking and overlapping louvers for
In one form of my louver 20, marginal band 16 cov 70 light fixtures comprising two louvers, each having a bodyers the upper half of the ends of strips 21 and lthe spaces
member having a plurality of crossing strips forming a
therebetween. A central marginal band 22 extends be
plurality of longitudinal-ly and laterally spaced cubes with
and change without departing from the spirit of my
3,033,979
open marginal ends, said body member having spaced
cooperating notches and said central bar at its ends also
sides and spaced ends, a marginal bandbeginning short
forming cooperating notches Aat its meeting with the open
of center on one of said sides and extending around one>
ends of said strips.
end =to a point shortl of center lon :the otherside, `another
y marginal band beginning short of the other side of center
on lsaid side and extending around the other 'end to aA
point short of center on the other side, a central band
extending between said marginal bands, saidfmarginal
bands at ‘their ends and the marginal open ends of said -
strips at their meeting having cooperating notches and
said central bands at their ends also having cooperating
notches at their meeting with the marginal open ends of
said strips, the marginal bands in the iirst of said flouvers
covering the uppervhalf, Vand the marginal bands in the
' second of said louvers covering «the lower half of the I
marginal ends of said strips, andthe central band of the
ñrst louver covering the lower half ¿and the central band
' of the second louver covering the _upper half of the mar~ '
gin‘al ends of said strips between the V'marginal bands, so
that the marginal Vband of the t-iirst louver rests on the mar- «
ginal band of the second louver, and the central band of
the second louver rœts on «the central band of the first
louver’a-s the louvers interengage and lock` at said notches.
4. Arlouver for light fixtures comprising a rectangiilar
' , body member having a plurality of crossing stri-ps form
ing a plurality of longitudinally >and laterallyV spaced
. cubes, said body having spaced sides Vand spaced ends, a
.bar portion beginning short of center on one of'said sides
and extending to one of said spaced ends, another har
ends, a bar portion beginning short of center on one of
said sides and extending to one of said spaced ends, an
other bar portion `beginning short of center on said side
and extending to the other of said spaced ends, a central
-bar extending between said bar portions, said bar portions
at :their `ends and> the open ends of said strips at their
meeting'forming cooperating notches and said central
bar at its ends also forming cooperating notches at its
meeting with the open ends of said strips, the bar portions
in the `Íìrst of'said Vlouvers covering «the upper half of'said
side, and the bar portions in the second of said Ilouvers
covering the lower half of ysaid side, and the central bar
t, of the iirst louver covering the lower lhalf of said side and
the central bar of the second louver covering the upper
half of the said side, so that the bar portions of the iirst
louver rests on the hair portions of the second louver, and
the central bar of the :second louver rests on the central
bar of the iirst louver as the louver-s interengage and inter
lock at said notches.
References Cited iiijthc hie of this patent
portion beginning short of center of said one side and ex
tend-ing to the other of said spaced ends, said bar por->
tions covering the upper half of said one side, a central
bar covering the lower half of said one side and extending
`between said bar portions, said bar portions at 'their ends '
- and the open ends of said strips at their meeting forming
.
5. A pair of interlocking and overlapping louvers for
light fixture comprising two louvers, each louver having
a body member having a plurality of crossing strips form
ing a Yplurality of longitudinally and laterally spaced
cubes, said body member having spaced sides and spaced
UNITED STATES PATENTS
-
2,607,455
venin _r _______ __V_____ Aug. 19, 1952
861,688
Germany -..t _________ __ Dec. 29, 19,52
FQREIGN YPATENTS
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