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Publication numberUS3797789 A
Publication typeGrant
Publication dateMar 19, 1974
Filing dateMar 22, 1972
Priority dateMar 22, 1972
Publication numberUS 3797789 A, US 3797789A, US-A-3797789, US3797789 A, US3797789A
InventorsWasson K
Original AssigneeArmstrong Cork Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Support bar for suspended ceiling light fixture
US 3797789 A
Abstract
Suspended ceiling systems are provided with light fixtures which are supported by the gridwork of the suspended ceiling system. Herein, a support bar is positioned relative to two adjacent main runner structures of a suspended ceiling system for the purpose of supporting one side of a light fixture. The light fixture is hung from two adjacent support bars which are in turn supported by the main runner portion of the ceiling system.
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Description  (OCR text may contain errors)

United States Patent [191 Wasson [4 1 Mar. 19, 1974 SUPPORT BAR FOR SUSPENDED CEILING LIGHT FIXTURE [75] Inventor:

[73] I Assignee: Armstrong Cork Company,

Lancaster, Pa.

[22] Filed: Mar. 22, 1972 [21] Appl. No.: 237,052

Kenneth L. Wasson, Lancaster, Pa.

[52] US. Cl 248/214, 52/28, 248/343 [51] Int. Cl. F21! 3/02 [58] Field of Search 248/214, 215, 342, 343,

[56] References Cited UNITED STATES PATENTS 11/1967 Sutter. 52/28 8/1933 Yeager..." 2/1937 Venzie 52/484 X 3.711.052 1/1973 Hoffman 248/343 X 3,039,729 6/1962 Nagle 248/343 2,939,669 6/1960 Pascucci 248/343 FOREIGN PATENTS OR APPLICATIONS 1,413,410 8/1965 France 248/343 Primary Examiner-J. Franklin Foss [5 7] ABSTRACT Suspended ceiling systems are provided with light fixtures which are supported by the gridwork of the suspended ceiling system. Herein, a support bar is positioned relative to two adjacent main runner structures of a suspended ceiling system for the purpose of supporting one side of a light fixture. The light fixture is hung from two adjacent support bars which are in turn supported by the main runner portion of the ceiling system.

3 Claims, 1 Drawing Figure SUPPORT BAR FOR SUSPENDED CEILING LIGHT FIXTURE BACKGROUND OF THE INVENTION 1. Field of the Invention The invention herein is directed to a suspended ceiling system and, more particularly, to a light fixture support bar in a suspended ceiling system.

2. Description of the Prior Art In U. S. Pat. No. 3,352,07], the conventional cross runner 12 is used to carry the lighting fixture. This is a very typical installation for supporting a light fixture in the ceiling system.

U. 5. Pat. No. 3,581,448 is another example ofa support structure for holding a light fixture in position in a ceiling assembly.

A number of different structures are available in the art to support a lighting fixture. Herein, there is provided a support bar structure which may be positioned anywhere within the ceiling system to support a light fixture in position. The support bar is carried by the main runner structures and can position the light fixture anywhere within two adjacent main runner structures without having the need to restrict the light fixture placement relative to the placement of the cross runner structures which heretofore have been the basic support structures for the light fixtures.

SUMMARY OF THE INVENTION Main runner structures are the primary support elements for a suspended ceiling system. A plurality of the main runner structures are placed in a side-by-side relationship. normally spaced 2 feet apart. The light fixture is meant to be positioned between, and extending along, the main runner structures. The invention herein is a support bar which has collapsible legs. The structure is in a collapsed state for shipment, and the legs are extended to their operational position when the support bar is mounted in position. The support bars are formed with ends on the leg structures which permit the support bars to readily engage the vertical web of the main runner structure. This then holds the support bar in position spanning the distance between two main runner structures. Two support bars are positioned between two adjacent main runner structures, and a light fixture is hung from the support bars.

BRIEF DESCRIPTION OF THE DRAWING The sole FIGURE is a perspective view of the invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT rality of ceiling boards or translucent lens elements are,

positioned on the horizontal flanges 4 of the main runner structures. Since the boards and lenses are approximately 4 feet in length. cross runner structures would be provided to support the edges of two adjacent boards or lenses. These cross runner structures are very similar to elements 12 of US. Pat. No. 3,352,071.

Since the placement of the cross runner structures is controlled by the board or lens size and, since they are not of great structural strength, it is more convenient to support lighting fixtures from supplemental support elements rather than the cross runner structures.

Herein, is provided a support bar structure for supporting light fixtures in a suspended ceiling system. The support bar structure is positioned to span two adjacent main runner structures 2 and the support bar is carried by the vertical web 6 of the main runner structures 2. In some main runner structures, the vertical web is an I-I-shape and the support bar structure herein can be used with one leg of the H or with the single leg of the inverted T-shape. In the embodiment shown in the drawing, the support bar is basically composed of a main body structure 8 and two leg assemblies 10.

The main body structure 8 is basically an inverted U- shaped channel structure which is slightly longer than the distance between two adjacent main runner structures 2. Slot structures 12 are provided in the surface 141 of the channel structure. The slots 12 are for use with the light fixture support strap of the abovementioned copending application.

Each of the leg assemblies 10 is fastened by a pin 16 to the end of the main body structure 8. The pin 16 not only fastens the leg assemblies to the main body structure, but also functions as a pivot point which will permit the leg assemblies 10 to swing relative to the main body structure 8.

The leg assemblies 10 are of basically a modified U- shape. Each leg 20 of the U is roughly triangular in shape. Generally, the base of the triangle is positioned by the side of the main body structure 8 and the pivot pin 16 passes through one corner of the base. Closely adjacent the pivot pin a little lock tab 18 is formed to lock the leg in position. The lock tab is formed by cutting out a piece of metal along three sides from the side legs 20. The tab is formed very similarly to the protuberance 34 of U. S. Pat. No. 3,352,071. When the triangular sides of the leg assemblies 10 are positioned adjacent the main body member 8, the tab is in an ineffecfive position. Swinging the leg assemblies 10 through degrees relative to the main body structure 8 then permits the tab to pop outwardly from the leg 20 and engage the lower edge of the U of the main body structure 8. This then prevents the leg from moving back towards its collapsed position. Connecting the two side legs 20 of the leg assembly 10 there is a flat metal structure 22. This structure is positioned on one side of the vertical web 6 of a main runner member 2 and is provided with a hole 24 into which a sheet metal screw may be placed to fasten the structure 22 to the vertical web 6 of the main runner structure. This in turn will result in the attachment of the support bar to the main runner structure. At the point where the flat structure 22 engages the triangular legs 20, the triangular legs are provided with a notch structure 26. Into this notch structure 26 is positioned the top of the vertical web 6 of the main runner structure 2. The combination of the notch resting on the vertical web plus the flat structure 22 positioned on one side of the vertical web will hold the support bar in position. The provision of a screw through hole 24 will permanently lock the structures together.

There is now provided a support bar for lighting fixtures which may be shipped in a collapsed state and readily extended to span the distance between two adjacent main runner structures to support a light fixture therein. On the left side of the showing of the support bar in the drawing. there is shown in dotted line form the leg in its collapsed state. The right side of the support bar of the same drawing shows the leg in its extended state in engagement with the vertical web of a main runner structure.

What is claimed is:

1. The support bar for supporting a light fixture within a suspended ceiling system. the suspended ceiling system being composed of main runner structures which are generally of an inverted T shape with an upwardly extending vertical web, said support bar structure being of a length approximately that of the spacing between two adjacent main runner structures, said support bar having two pivotally-connected legs at the ends of the support bar structure, said pivoted legs having means on the ends of the legs for engaging the top ponly of the vertical web of the main runner structures to support the support bar in position on two adjacent main runner structures. said legs for the support bar are generally U-shaped with two sides and a connecting part and with the ends of the two sides of the U shape extending on either side of the main body of the support bar, each of the sides at their ends near the connecting part containing a notch which engages only the top of the vertical web of the main runner structure and the connecting part between the two sides of the U- shaped leg being positioned on one side of the vertical web of the main runner structure.

2. The structure of claim 1 wherein there is means to lock the legs in their extended position generally perpendicular to the ends of the main body of the support bar.

3. The structure of claim 2 wherein means are provided on the legs for fastening the legs to the vertical web of the main runner structures to permanently lock the support bar and main runner structure together.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1924824 *Sep 23, 1931Aug 29, 1933Prentiss Wabers Products CoVapor stove
US2070150 *Mar 30, 1933Feb 9, 1937Nat Gypsum CoBuilding construction
US2939669 *Oct 29, 1956Jun 7, 1960Miller CoHanger assembly for lighting fixtures
US3039729 *Jul 24, 1959Jun 19, 1962Nagle Sr Francis ELighting fixture support
US3352071 *Mar 8, 1965Nov 14, 1967Lock Products CoFixture for use in a suspended grid ceiling system
US3711052 *Jan 28, 1971Jan 16, 1973Westinghouse Electric CorpSupport hanger for interior lighting fixture
FR1413410A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3995798 *Dec 5, 1975Dec 7, 1976Armstrong Cork CompanySupport for a vaulted ceiling module
US5024412 *Oct 15, 1990Jun 18, 1991Llama Precision Inc.Hanger assembly
US6119784 *Jan 8, 1999Sep 19, 2000Pnm, Inc.Support system for fire protection sprinklers
US6123154 *Jan 8, 1999Sep 26, 2000Pnm, Inc.Support system attachment mechanism for fire protection sprinklers
US6488097Jan 8, 1999Dec 3, 2002Pnm, Inc.Fire protection sprinkler head support
US6752218 *Nov 14, 2002Jun 22, 2004Pnm, Inc.Fire protection sprinkler head support
US7032680Mar 24, 2004Apr 25, 2006Pnm, Inc.Fire protection sprinkler head support
US7874708 *Jun 26, 2007Jan 25, 2011Genlyte Thomas Group, LlcT-bar mounting system
Classifications
U.S. Classification248/214, 248/343, 52/28
International ClassificationF21V21/02, E04B9/00, F21V21/04
Cooperative ClassificationE04B9/006, F21V21/04
European ClassificationF21V21/04, E04B9/00D