U.S. patent number 3,697,742 [Application Number 05/069,547] was granted by the patent office on 1972-10-10 for trim ring for architectural light including means for stepped rotational and axial adjustment.
This patent grant is currently assigned to Air King Corporation. Invention is credited to Mitchell Bobrick.
United States Patent |
3,697,742 |
Bobrick |
October 10, 1972 |
TRIM RING FOR ARCHITECTURAL LIGHT INCLUDING MEANS FOR STEPPED
ROTATIONAL AND AXIAL ADJUSTMENT
Abstract
A recessed lighting fixture is provided in which the trim ring
has a number of substantially vertical hanger members which
cooperate with stepped shoulders carried by the lower portion of
the main cylindrical frame of the fixture to provide selective
axial height adjustment of the trim ring with respect to the
frame.
Inventors: |
Bobrick; Mitchell (Beverly
Hills, CA) |
Assignee: |
Air King Corporation
(N/A)
|
Family
ID: |
22089706 |
Appl.
No.: |
05/069,547 |
Filed: |
September 4, 1970 |
Current U.S.
Class: |
362/366;
362/364 |
Current CPC
Class: |
F21S
8/02 (20130101); F21V 21/04 (20130101); F21V
17/164 (20130101) |
Current International
Class: |
F21S
8/02 (20060101); F21V 21/04 (20060101); F21V
21/02 (20060101); F21V 17/16 (20060101); F21V
17/00 (20060101); F21v 021/22 () |
Field of
Search: |
;240/2V,2W,67,68,73BC,78R,78H,78HH,78CF,78CD,151,152
;98/101,107,110,111,112,114,4DL ;248/27,56,342,343 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Queisser; Richard C.
Assistant Examiner: Snee, III; C. E.
Claims
What is claimed is:
1. In a recessed lighting fixture of the type that provides a
recess in a wall for receiving therein the light and a baffle
member, and which includes a trim ring located at the edge of the
recess for shielding the mounting of the fixture in the wall, the
improvement comprising, in combination, a frame member providing a
cylindrical inner wall bounding the recess, a baffle having a
cylindrical end that is adapted to be positioned generally
concentrically within said inner wall in spaced relation thereto,
said frame member having means for supporting a trim ring, said
supporting means being arcuately arranged around the wall of said
frame member at different levels, a trim ring having means for
releasably coacting with said arcuately arranged means whereby
there is provided a releasable, rotational and axially adjustable
connection of said trim ring to said frame without separate
connector means, said trim ring having an in-turned flange for
engaging the baffle to prevent movement of the baffle axially
outwardly past said cylindrical inner wall, and the presence of the
baffle engaging said in-turned flange cooperating with the trim
ring to prevent inadvertent release of the trim ring from the frame
member while permitting axial adjustment of the trim ring relative
to the cylindrical inner wall of the frame member.
2. A construction as in claim 1 wherein said supporting means
comprises three sets of supports each arranged in a stepped series
for incremental axial adjustment, and the trim ring having three
axially extending members with out-turned hooks thereon for
cooperation with the three sets of support.
3. A construction as in claim 1 wherein axial adjustment of the
trim ring is effected by rotation of the trim ring.
4. A construction as in claim 2 wherein the steps of each set of
supports are arranged arcuately along the cylindrical inner wall of
the frame member, each step having an arcuate extent to fully
support the hook, and a raised impediment at the end of each step
that is above an adjacent step for preventing a hook from slipping
from one step to the next lower step.
5. A construction as in claim 2 wherein the trim ring includes a
sleeve portion and the axial extension members are elongated and
lie within the axially projected plane of said sleeve with the
out-turned hooks located outwardly of said projected plane of the
sleeve, the length of the extension members affording flexibility
thereof to permit release of the trim ring from the frame member
when the baffle has been moved axially away from the in-turned
flange a distance sufficient to expose the distal ends of the
extension members.
Description
BACKGROUND OF THE INVENTION
This invention relates to an improved recessed lighting fixture of
the type which uses a trim ring that is connected to the bottom of
the lighting fixture frame.
It is an object of the present invention to provide a recessed
lighting fixture that is simple in construction and can be
assembled rapidly at the point of installation.
Another object of the present invention is to provide a recessed
lighting fixture having a trim ring which can be adjusted axially
in a simple and effective manner without the use of external
fastening means such as screws.
A still further object of the present invention is to provide a
recessed lighting fixture having a light baffle which rests on a
trim ring and effectively locks the trim ring to the lighting
fixture frame once the components are in place.
Other objects and advantages will become apparent from the
explanation which is provided in the following description and
claims, and is illustrated in the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a recessed lighting fixture
constructed in accordance with the principles of the present
invention with portions of structure broken away for purposes of
clarity;
FIG. 2 is a fragmentary, enlarged cross-sectional view taken
substantially along the line 2--2 of FIG. 1 and showing the trim
ring in a lowered position;
FIG. 3 is a fragmentary enlarged cross-sectional view thereof,
taken substantially along the line 3-- 3 of FIG. 1, but showing the
trim ring in its uppermost raised position;
FIG. 4 is a fragmentary top plan view of the lower frame portion of
the lighting fixture of FIG. 1, taken substantially along the line
4-- 4 of FIG. 5 and showing the stepped elements for cooperation
with the trim ring;
FIG. 5 is an exploded view comprising a cross-sectional view of the
lower frame portion of FIG. 4, taken substantially along the line
5-- 5 of FIG. 4, and a similar cross-sectional view of the trim
ring that connects to the lower frame portion; and
FIG. 6 is a fragmentary top plan view of the trim ring taken
substantially along line 6-- 6 of FIG. 5.
DETAILED DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENT
Referring to the drawings, the fixture disclosed herein is
generally of the well-known architecturally recessed type wherein
the opening through which light is directed is intended to appear
flush with the opening in the structural wall element.
As illustrated in FIG. 1, the structural wall element, in this
instance a ceiling 10, has positioned therebehind a plurality of
structural elements such as elongated mounting bar 12 which
supports the lighting fixture. It will be understood that the
spacing between mounting bar 12 and the outer surface of wall 10 is
variable, which requires the presence of an adjustable trim ring
upon the light fixture as will be provided for by the instant
invention.
The lighting fixture includes a lower frame portion or mounting as
best seen in FIGS. 4 and 5 which has thereon a means for securement
of the lighting fixture to the mounting bar 12. The lower frame
portion 14 provides certain elements as herein identified, and may
conveniently be an aluminum die-casting. Frame portion 14 includes
annular section 16 shaped to provide a depending ring 18 having an
out-turned flange 20 at its upper end. A pair of spring-mounting
means 22, that each includes a pair of elongated studs 24, and
adjacent shorter studs 25 extend upwardly from diametrically
opposite portions of ring flange 20. At right angles to said
diametric arrangement of means 22 is a junction box means 26 that
includes a box base 28 supported laterally of flange 20 by a pair
of cantilever support flanges 30 appropriately rigidified and
reinforced by transverse flanges as shown.
Spring-biased sheet metal mounting means 32 carried on studs 24 are
provided with outwardly-extending apertured flanges 34 through
which extend an elongated support bar 12. Although only one such
means 32--34 is shown in FIG. 1, the diametrically arranged studs
24 are adapted to provide two such supports for connection to two
parallel space bars 12. It will thus be understood that the
arrangement operates to locate flange 20 and the lower end of ring
18 in planes parallel to and spaced below the plane of support bars
12. While the support means 32- 34 may be provided with additional
slot-and-screw adjustment means 35 for vertical adjustment, the
type of vertical adjustment that we are here interested in relates
to a trim ring that cooperates with ring 18 in a manner as
hereinafter disclosed.
Before discussing the trim ring it will be noted that the mounting
means 32 also includes inwardly-extending spring-biased means 36
with inwardly directed offsets 37 for positional cooperation with
spaced circumferential grooves 38 in the wall of a can-shaped body
40 that is spaced above the lower frame portion 14 of the light
fixture. The studs 25 passing through enlarged apertures in the
means 36 operates to limit movement of means 36. The two sets of
means 36 provide four inturned offsets 37 which enter a groove 38
to substantially rigidly hold the can-shaped body in desired
position spaced from frame 14. A junction box 42 on the top of the
can provides a means for effecting an electrical connection to a
light bulb within the can as is well known in the art.
It is sufficient to note that interiorly of ring 18 and can 40
there is located a baffle for a purpose that is well known in the
art. The baffle may be of various shapes, but typically may be a
cylindrical body as shown at 44 in FIGS. 1 and 2. The baffle 44 is
generally loosely positioned within the recess defined by the
fixture, but the outermost end 44 a is generally closely concentric
within frame ring 18.
Now, the location of the outerside of wall 10 may be varying
distances from flange 20 as illustrated in FIGS. 2 and 3 where the
spacing between the two is greater in FIG. 2 than in FIG. 3. The
purpose of a trim ring is to provide a neat-appearing joint at the
lower end of the fixture and to hide the appearance of the
structural parts located thereabove.
The trim ring 46, which is preferably formed of a plastic material
or of aluminum, includes an elongated cylindrical sleeve 48 having
at one end an out-turned flange 50 of substantial radial extent and
an in-turned flange 52 of lesser radial extent. Projecting from the
other end of sleeve 48 are three equally-spaced extension members
54. Each extension member 54 is long relative both to the radial
thickness of the member and to its arcuate width, so that extension
member is readily flexible. Each member 54 has at its distal, or
extended, end an out-turned flange or hook 56. The body of each
member 54 lies in the cylindrical plane of sleeve 48 so that in
effect only hook 56 extends radially outwardly of the cylindrical
plane of sleeve 48.
The inner wall of depending ring 18 of lower frame portion 14 is
formed and shaped to provide three equally spaced identical sets of
steps or shoulders 58, with each set adapted for cooperation with
the hook 56 of one of the extension members 54. As seen in FIG. 5,
each set of steps 58 provides nine equal steps arranged from left
to right, or counterclockwise when looking upwardly, in descending
order with the uppermost step 58 a spaced closely below the upper
edge of ring 18 and the lowermost step 58 b spaced about midway of
the axial height of ring 18. Axially extending edges 58 c adjacent
uppermost step 58 a and 58 d adjacent lowermost step 58 b serve as
abutments that limit rotation of trim ring 46. Each of the steps 58
has a flat arcuate width that is at least as great as the arcuate
width of hook 56 on extension member 54. At the edge of each step
58 there is a small raised protuberance, or tit, 59 which provides
limited but effective resistance against hook 56 inadvertently
slipping from one step 58 to the next lower step 58. The height or
spacing between upper step 58 a and the lower edge of ring 18 is
slightly less than the spacing between hook 56 and out-turned
flange 50, as best seen in FIG. 3.
When the trim ring 46 is in position on ring 18, the in-turned
flange 52 serves to engage the lower edge 44 a of baffle 44 to
support same. With baffle 44 resting on flange 52, the outer wall
of baffle 44 lies closely adjacent the extension members 54 to hold
same in position for each of the hooks 56 to engage with the sets
of steps 58. Thus, the hooks 56 cannot inadvertently disengage and
there is no possibility of the trim ring 46 falling out of the
frame ring 18. However, the trim ring 46 may still be rotated about
its center or axis to move the ring to a higher or lower height as
desired. If it is necessary to have access to the interior of the
light fixture, the baffle 44 is pushed axially away from trim ring
46 sufficiently to expose the distal ends of the extension members
54 and by flexing the members 54 away from frame ring 18 the hooks
56 are released to release the trim ring 46. Since the hooks 56 may
be moved to the lowermost shoulders 58 b, the minimum amount of
axial movement required of baffle 44 to permit disengagement of
trim ring 46 from frame ring 18 is less than the axial height of
ring 18.
It will be understood that the radial dimension of out-turned
flange 50 may vary depending upon the installation. It is
contemplated that trim-rings of a few basic sizes of out-turned
flange 50 (say three in number) may be provided packaged with a
fixture, so that the installer will be able to properly install the
fixture with one of the trim rings supplied. The cost of such trim
rings is relatively small, but at the same time the installation
may be easily and quickly performed from outside the fixture
without use of any separate fastening means such as screws or the
like.
Although an illustrative embodiment has been shown and described,
it is to be understood that various substitutions and modifications
can be made by those skilled in the art without departing from the
spirit and scope of the present invention.
* * * * *