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Publication numberUS1305234 A
Publication typeGrant
Publication dateMay 27, 1919
Filing dateJun 1, 1915
Publication numberUS 1305234 A, US 1305234A, US-A-1305234, US1305234 A, US1305234A
InventorsRobert F. Pierce
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1305234 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)




1,305,234. Patented May 27,1919

gmueutoz (lttowm;





To all whom it may concern:

Be it known that I, ROBERT F. PmRoE, a; citizen of the United States, residing in Collingswood, Camden county, State of New Jersey, have invented certain new and useful Improvements in Lighting-Fixtures, of which the following is a specification.

. One of the objects of my invention is to provide a lighting fixture including a novel arrangement of-the light reflecting and diffusing members in relation to the light source whereby the widest and most eflicient distribution of light upon the ceiling of a room may be obtained.

A further object is to so combine and arrange the light reflecting and diffusing members or bodies with. respect to the light source that the rays of light emanatlng therefrom strike the surfaces of such members at the smallest practicable angle whereby a more eflicient redirection or reflection of the light rays is obtained.

Although the fixture embodying my invention is especially suitable and adapted for use in shops, laboratories and industrial plants generally, yet it is also suitable for use in dwellings, public halls, etc., and it is a further object of my invention that the construction shall be simplified and cheapened so that its use may become general.

Other objects and advantages of my invention will be referred to in the'detailed description thereof which follows or will be apparent therefrom.

In the accompanying drawings I have illustrated one constructional form of my invention but it will be understood that changes in the construction may be made within the scope of the claims without departing from my invention.

In the drawings Figurel is a side elevation of a fixture embodying my invention;

Fig. 2 is a top plan view of the same; and

Fig. 3 is a view partly in vertical section and partly in side elevation of the'same.

Referring to the drawings, 1 designates a pipe or conduit through which electric wires extend to a socket 2. The conduit 1 usually depends from a ceiling or other wall and at its point of emergence from such celhng or wall is provided with and surrounded by a" shield or skirt 3. 4 designates an electric light bulb which engages the socket 2. 5 des- Specification of Letters Patent.

Patented May 27, 1919.

Application filed June 1, 1915. Serial No. 31,370.

ignates the incandescent filament of said electric light, said filament constituting the source of light. For the purpose of diflusing and reflecting the light I have provided the slightly concavo-convex diffusing and reflecting member 6 which is suspended directly underileath the electric light, the center thereof being substantially directly underneath the source of light, namely, the incandescent filament 5. The edges of the reflecting and diffusing member 6 extend a considerable distance laterally of the said light as shown in the drawings. Said member 6 preferably is translucent or semi-transparent so that-portions of the light pass therethrough while other portions are reflected from the surface thereof. The said member 6 is supported by means of chains 10, three of which are employed, although it will be understood that the number may be changed if desired. The lower ends of the chains are provided with elongated rods or links 11 having hooks 12 at their lower ends which detachably en'- gage the outer edges of the member 6 and supportthe same as is apparent from the drawings. v

In the construction shown it will be observed that the outer edges of the member 6 are situated in a horizontal plane which extends a short distance below or outside of and outwardly and is provided with holes 17 through which the links or rods 11 extend. It-willbe understood that the upper ends of these links are passed through the opening 17 before the eyes 18 thereof are formed.

The member 15 may consist of any suitable material, as metal, having its upper surface polished or provlded-with a coating of suitable materia wherebysuch upper surface becomes a reflecting surface or the said-member 15 may be coin sl'iru cted as the member 6 ofsemi-transparent or translucent material. The member lfi -supported in proper position upon'the rods or links 11 by means of flange-like projections 20'thereon. The upper-ends of the chains-10 are connected with hooks 21 which are secured upon the shield or skirt 3 previously referred to.

It will be observed that the position of the outer edges of the member 6 with respect to the source of light at and with respect to the lower edge of the annular member is such that the rays of light which emanate from the source at 5 and pass underneath the lower edge 16 of the annular member 15 and which do not impinge upon the member 6 extend outwardly very nearly in a horizontal direction so that they will not pass directly to the eyes of any one who may be in a room lighted by my fixture.

It will also be observed that the relation of the members 6 and 15 with respect to the source of light at 5 is such that the rays of light from said source strike the surfaces of the said members at the smallest practicable angles with the result that a more eflicient reflection of the rays is obtained.

Certain of the rays which impinge upon the upper surface of the member 6 are reflected against the under side of the member 15 which under side is also a reflecting surface, from which surface certain of the rays are reflected outwardly into the room while others are reflected back against the member 6 and finally pass out into the room in which the fixture is located.

Of course, the angles at which the rays from the light source 5 impinge upon the member 6 vary at different points increasing as the center is approached at which a central ray from the light source 5 is perpen- 1cjlicular to the opposing surface of the memer 6. Y

Instead of an electric light a gas or oil light may be employed.

The members 6 and 15 may be of any other suitable shape or contour which may be preferred to the shapes shown.

I claim 1. A light fixture comprising a source of light, an annular reflecting member, the inner edge of said annular member being situated in a plane passing in proximity to the lower edge or end of said light source, a

light reflecting and diffusing member situated below the said light the outer edges of which extend beyond the outer edges of the said annular reflecting member and being nearly horizontal and in substantial parallel relation to said annular reflecting member,

and means common to the said members for supporting the same in operative relation to the said light.

2. In a light fixture in combination a light emitting element, a substantially horizontal light reflecting and diffusing member supported underneath the said light, a substantially horizontally arranged annular light reflecting member supported above the first named member and having its inner edge practically in the plane of the lower end of said light emitting element, said element extending upwardly from said plane and said annular member being inclined upwardly and outwardly from its inner edge, means for supporting'the said members, said means including rod-like members extending through .the' said annular reflecting member and being provided with means underneath the same for supporting it and being provided with means at their outer ends for engaging and supporting the first named reflecting member, substantially as described.

In testimony that I claim the foregoing

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4186433 *Feb 21, 1978Jan 29, 1980General Electric CompanyLuminaire
U.S. Classification362/300, 362/408
Cooperative ClassificationF21V7/04, F21S8/06