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Патент USA US3089033

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May 7, 1963
driginal Filed Feb. 6, 1956
4 Sheets-Sheet 1
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May .7, 1963
Original Filed Feb. 6, 1956
4 Sheets-Sheet 2
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May .7, 1963
4 Sheets-Sheet 4
Original Filed Feb. 6, 1956
INVENTOR My,” H 77.0%, BY
United States Patent 0
William A. Trott, 115 Middlegate, Winnipeg,
Manitoba, Canada
Continuation of application Ser. No. 563,804, Feb. 6,
1956. This application July 6, 1959, Ser. No. 828,427
4 Claims. (Cl. 240-9)
Patented May 7, 1963
A still further object of my invention is to provide a
device of the character herewithin described which ena
bles many variations of color and design of the presen
tation panels either by printing or shadow effect, or by
the placement of colored translucent materials upon the
inner surfaces of said presentation panels.
A further object of my invention is to provide a de
vice of the character herewithin described in which the
My invention relates to new and useful improvements
majority of maintenance normally required by ceiling
in lurninaires, this application constituting a continuation 10 ?uorescent lighting ?xtures is eliminated, the only main
of my application Serial No. 563,804, ?led February 6,
tenance required being the replacement of lamps at rela
1956, now abandoned. The principal object and essence
tively infrequent intervals. This is in contrast with con
of my invention is to provide a high e?iciency light diffu
ventional ?uorescent light ?xtures, which, in order to
sion cell surrounding the anterior side of the light source
maintain e?iciency of light output, require regular and
said cell being sealed against the ingress of dust, insects 15 frequent cleaning of the light re?ecting and transmitting
and the like, thereby eliminating the need for cleaning
the inner light re?ecting and transmitting surfaces of the
With the foregoing objects in view, and such other ob
cell and thus reducing maintenance costs considerably.
jects and advantages ‘as will become apparent to those
A further object of my invention is to provide a device
of the character herewith described which is applicable to
luminaires designed for surface mounting, as standard
recessed units, and in particular suspended ceiling in
Yet another object of my invention is to provide a
device of the character herewithin described which in
cludes readily attachable and detachable light diffusing
cells, thereby making lamp replacement extremely simple.
Still another object of my invention, in conjunction
skilled in the art to which this invention relates as this
speci?cation proceeds, my invention consists essentially
in the arrangement and construction of parts all as here
inafter more particularly described, reference being had
to the accompanying drawings in which:
FIGURE 1 is a side sectional elevation of my device
in the installed position taken substantially along the line-s
1—1 of FIGURE 2.
FIGURE 2 is a section taken at right angles to FIG
with the foregoing objects, is to provide means for readily
URE 1 substantially along the lines 2—2 of FIGURE 1,
but showing the components in separated relationship.
supporting structure, whereby the former can be lowered
FIGURE 3 is a perspective View reduced in scale from
FIGURES 1 and 2, showing one of my luminaires in the
attaching ‘and detaching the light diffusion cell from the 30
and suspended from the supporting structure for cleaning
and the like and in which, furthermore, the attaching and
‘detaching operating means is formed of material similar
to the anterior presentation or light diffusing panel, thus
making the operating means a functional part of the
pattern of said panel and eliminating ‘unsightly dark por
installed posit-ion.
FIGURE 4 is an enlarged fragmentary perspective View
of one end of one of the light troffers and one end of
the light diffusion cells.
FIGURE 5 is :an enlarged fragmentary perspective view
of a portion of the H supporting frames.
FIGURE 6 is an enlarged fragmentary perspective View
tions normally associated with such structures.
A yet further object of my invention is to provide a
40 of the upper end of one of the elongated members at
device of the character herewithin described which, par
tached to the ceiling supporting structure.
ticularly when used in a suspended ceiling installation, is
FIGURE 7 is a fragmentary top‘ plan view showing
adapted to bear against ‘the anterior side of conventional
the method of attaching the light diffusion cell support
Tabar supports under spring pressure rather than resting
ing rod to its supporting surface.
upon the upper surfaces thereof, thereby eliminating (1) 45 FIGURE 8 is an enlarged fragmentary sectional view
noise due to vibration of the units caused either by ex
of one of the T-bars and the ?ange-s of a pair of adja
ternal causes or high velocity ventilating systems and
cent luminaires.
(2) the considerable maneuvering required to position
FIG. 9 is a view similar to FIGURE 2 but showing
light-passing panels and the like through the openings
the cell in operative relationship with the associated re
formed by the T-bars in order that they may be lowered 50 ?ector.
into position upon said ?anges.
In the drawings like characters of reference indicate
A further object of my invention in conjunction with
corresponding parts in the different ?gures.
the foregoing objects is to permit luminaires to be posi
The accompanying drawings cover primarily my in
tioned adjacent one another the form of a module as
vention as adapted to be utilized in a suspended ceiling
sembly capable of luminously covering an interior build 55 installation. It will be appreciated however that it can
ing surface, particularly a ceiling, and which, when the
be adapted readily for use as a recessed installation in
presentation or anterior light diifusing panels thereof are
made of plastic, permits the ?anges of said panels to abut
a wall or as a surface mounting either upon a wall or
installation or, alternatively, as ‘a suspended ceiling em
bodying one or a plurality of luminaires interspersed with
channels 20 having a cross channel 21 spanning same
ceiling. The said invention consists primarily of three
and cover the T-bars. This, together with the character
principal assemblies; a ceiling support assembly collec
istics of plastic, permits light to ‘bleed right to the edges, 60 tively designated A; a light re?ector assembly collectively
and eliminates or reduces dark lines between adjacent
designated B; and a light diffusion cell assembly c0llec~
tively ‘designated C, all of which are shown in separated
luminaires normally caused by said T-bars.
Yet another object of my invention is to provide a de
relationship in FIGURE 2 of the accompanying draw
vice of the character herewithin described which is
Assembly A consists of a pair of spaced and parallel
adapted for use either as a complete suspended ceiling 65
medially the ends thereof, said cross channel acting as
a Wiring channel. Depending from the extremities 22
of the channels 20 are elongated supporting members 23,
abling the architect considerable latitude of design hav
ing regard to overall lighting requirements and speci?c 70 said members being secured to the extremities 22, either
by welding or bolts or similar means. Flanged end caps
concentrated lighting requirements in various areas of
24 are ?tted over the ends of the channels after the
the room.
plain or patterned acoustic panels and the like, thus en
members 23 are secured, in order to close these ends.
Conventional T-‘oars 25 are secured to the lower ends
ing panel 42, can be of any convenient design and FIG
URE 3 of the accompanying drawings shows the design
26 of the elongated supporting members 23, thus forming
a rectangular frame, the dimensions of which are equiva
lent to the dimensions of the luminaire assembly.
This assembly A may either be secured directly to the
con?guration includes a pair of relatively square forma
tions 57 formed integrally into one presentation panel,
each square having a central portion 58. These portions
ceiling 27, or may be secured to hangers 28v suspended
are ‘utilized in actuating the means collectively designated
utilized in this embodiment.
it will be seen that the
from the ceiling, depending upon the desired ?nished
59, adapted to attach and detach the light diffusion cell
to assembly B. The portions 58 are secured to the
suspended ceiling height.
Assembly B consists of a pair of upwardly ?anged 10 lower ends of rods 60‘, which pass upwardly through
elongated members 29 spanned medially the ends thereof
by a v?anged member 30, said member 30 being parallel
the aforementioned tubes 52 and terminate with a trans
downwardly from member 21 and engaging within aper
tures 33 formed in member 30‘, wing nut 34 completing
dropping out of position.
verse pin 61 adjacent the upper end 62 thereof. Means
taking the form of collar 63 secured to the rod above
to and adapted to engage with the aforementioned trans
verse member 21. The assembly includes ?uorescent
the lower end of inner ?anges 44 and restrict downward
lamp holders 31, and such items as transformers and 15 movement of the rod under the in?uence of spring 64
reacting between members 53 and the surface 65 of the
ballasts (not illustrated) and is adapted to be detachably
secured to assembly A by means of bolts 32 extending
presentation panel 42. It also prevents rod 6i‘: from
Within the channel 39‘ is formed an elongated slot 66
said securement, so that member 30 encloses the channel 20 adapted to receive pin 61, which, when rotated through
ninety degrees can enter the slot and rest upon the upper
21 which, as hereinbefore mentioned, acts as a wiring v
surface 67 of the said channel, being prevented from
accidental disengagement therefrom by means of projec
Upon each side of member 30 and parallel therewith,
tions or dimples 68‘ formed within the said surface.
I have provided an elongated posterior re?ector 35 of
When the rods are disengaged from the channel 30,
parabolic cross-section. This re?ector extends between 25
the complete cell C may be lowered. It is restrained and
the members 29 and partially surrounds each light source
36 which is an elongated ?uorescent lamp. The re?ectors
35 are closed at the ends by end panels 37, as illustrated
in FIGURE 4. The perimeter 38 of said re?ectors takes
the form of a ?ange 39 adapted to receive a resilient seal 30
held captive by chains 69 attached at their lower ends
to rods v60 by means of rings 70, and at their upper ends
to the channel 36? by engagement thereof with strap
pieces 71 punched downwardly in the surface of the
40. formed of felt, sponge rubber or some similar ma
My light diffusion cell assembly C consists of a concavo
are checked by the aforementioned pins 63 when the
The rings 70 are free to slide on the rods and
convex posterior light transmitting panel 41, one_ for each
re?ector, and an anterior light diffusing presentation panel
assembly is in the fully lowered position.
When placing cell C in the operative position of the
35 accompanying FIGURE 9, it is offered upwardly to
42 spaced from said panel 41 by means of pairs of elon
gated, lateral, light re?ecting- panels 43 and 44. All the
wards the said re?ector 35 so that the perimeters 46
engage the gaskets 40 of the re?ector 35. At the same
time, due to the length of the elongated supports 23, the
foregoing structure is formed preferably of plastic ma
?anges 54 coterminous with the perimeter of the presen
terial, and is secured together to make a dust-proof‘ en
closure. The panels 431 and 44 may be opaque or semi 40 tation panel 42, engage the anterior or underside sur
faces 71 of the aforementioned T-bars 25. The upper
opaque re?ectors. with opposed light re?ecting surfaces
ends 62 of rods ‘66" are entered through the slots 66 with
which ‘direct light on to the presentation panel. The
in the channel 30 and the pins 61 are also entered
panels. 41 form, in conjunction with. the re?ectors 35,
through the slot by upward pressure upon the actuating
light chambers ‘45 surrounding lamps 36'. It Wlll be ob
served that the perimeters 46 of the panels 4-1 are ?anged 45 members 58 compressing springs 64.
A turn through ninety degrees of the actuating mem
as at 47, and these re?ectors are. adapted to engage, if
bers 58‘ engages. the pins 61 between the dimples or pro
desired, the aforementioned seal 4% around the perimeters
jections 68, whereupon release of the actuating mem
38 of the light re?ector panels aforesaid. In this con
bers 58 causes the springs 64 to maintain the assembly
nection, reference to FIGURE 4 will show that end panels
48 are included as part of the light diffusion cells, thus 50 under tension and in position.
completely enclosing the same.
Reference to FIGURE 8 will show that when two
adjacent luminaires are in position, the edges 72 of the,
The longitudinal edges 46 of the posterior light trans
?anges 54 and 55, are coterrninous and due to the fact
mitting panels 41 are cotermino-us with upper ?anged.
that at least the surrounding ?anges of the panel 42 are
edges 49 of the outer re?ector panels 43, which also
have inner, opposed light re?ecting surfaces, these panels 55 formed of plastic, the light bleeds through these edges,
thus preventing shadows or dark lines being cast by the
diverging outwardly and downwardly from the upper
T—bars 25.
It will also be understood that when in the operative
lateral re?ector panels 44. are also ?anged and are coter
position, both the light chambers 45 and the interior
minous with the opposite longitudinal edges 47 of the 60 surfaces of light diffusion cells C are enclosed (the latter
edges thereof.
The upper longitudinal edges 50 of the inner pair of
posterior panels. These inner panels also have light re
?ecting inner surfaces, and extend downwardly and m
being sealed) against ingress of dust, insects and the
like. Accordingly, the lateral light re?ecting panels 43
wardly, terminating at points 51 and being spaced from
and 44 may be considered as an extension of the re?ector
the aforementioned presentation panel 42 by means of ' 35——the whole forming a novel, deep and capacious re
65 ?ector in which both a ?uorescent lamp is situated, and,
tubes 52.
The lower longitudinal edges 53 of the panels 4-3 are
?anged outwardly as at 54, and are coterminous with
in front of it a dust excluding panel (posterior panel 41),
which (with panel 42) seals what may be described as
?anged edges 55 of the anterior light-diffusing presenta
the anterior part ‘of the re?ector-as-a-whole.
tion panel 42, said ?anges extending around the entire
Since various modi?cations can be made in my inven
70 tion as hereinabove described, and many apparently
perimeter of cell C and panel 42.
widely different embodiments of same made within the
The aforementioned junctions between the posterior
panels, lateral re?ecting panels, and anterior diffusing
spirit and scope of the claims without departing from such
panel are preferably heat sealed together in order to
spirit and scope, it is intended that all matter contained
in the accompanying speci?cation shall be interpreted as
The con?guration of the surface 56 of the light diffus 75 illustrative only and not in a limiting sense.
form a dust-shield enclosure.
What I claim as my invention is:
1. In a luminaire, in combination:
(a) a hollow rectangular light re?ecting and diffusing
cell having closed ends and comprising:
(I) a rectangular, anterior, light diffusing panel,
(II) a rectangular, posterior, light transmitting
panel spaced from said diffusing panel,
(III) longitudinal side edges,
(IV) elongated, lateral, light re?ecting panels hav
contained luminous modules of rectangular con?guration,
said modules having substantially contiguous marginal
edges, and rectangular anterior light diff-using panels
co~extensive with said interior surface, said modules each
comprising a hollow rectangular light-re?ecting and dif
fusing cell having closed ends, ‘said cell comprising said
light diffusing panel, an elongated rectangular light trans
mitting panel spaced rearwardly from said diffusing panel,
and elongated, lateral, light re?ecting panels having op
posed, re?ecting, inner surfaces, said re?ecting panels
connecting said light diffusing and transmitting panels to
ing opposed re?ecting inner surfaces, said an 10
terior and posterior panels being spaced, said
gether along said marginal edges of said cell, a source of
re?ecting panels connecting said anterior and
light comprising an elongated ?uorescent lamp disposed
posterior panels together along said side edges.
exteriorly and rearwardly of said cell, an elongated pos
(b) an elongated ‘?uorescent lamp disposed exteriorly
of said cell and rearwardly of said light transmitting 15 terior re?ector having an elongated re?ecting surface
(c) ‘an elongated posterior re?ector having an elon
gated re?ecting surface which is spaced from, and at
least partially to the rear of said lamp for optical co
spaced from and at least partially to the rear of said
lamp for optical co-action with said re?ecting panels, said
re?ector and said lamp being parallel to said side edges,
the said re?ecting surfaces of said re?ecting panels, and
said re?ecting surface of said posterior re?ector being
action with light re?ecting panels, with said re?ector
substantially co-terminous and co-extensive, and cell re
and lamp being parallel to said longitudinal side
tain-ing means capable of retaining said cell in said lumi
edges, said re?ecting inner surfaces of said re?ecting
naire while permitting separation of the same therefrom.
panels and posterior re?ector being substantially co
terminous and co-extensive,
References Cited in the ?le of this patent
(d) cell retaining means capable of retaining said cell 25
in said lurninaire while permitting separation of the
same therefrom.
2. The structure as de?ned in claim ‘1 wherein said
light diffusing panel of said cell is formed {from trans
lucent material.
3. The structure as de?ned in claim 1 wherein said
light diffusing panel of said cell is formed from trans
lucent material and said light transmitting panel thereof
is transparent.
4. A luminous covering for a planar interior surface 35
of a building in the form of a module assembly compris
ing in combination, a plurality of substantially similar self
Dorey ________________ __ Aug. 9, 1932
Ohm ________________ __ Apr. 28, 1942
Beck ________________ __. Oct. 14,
Runge _______________ __ Mar. 1,
Avenberg ____________ __ Dec. 22,
Wong ________________ __ June 7,
France ______________ __ Apr. 12, 1923
Netherlands _________ __ Nov. 16, 1942
Switzerland ___________ _. Mar. 31, I960
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