US1568929A - Electric-lighting fixture - Google Patents

Description

W. SYMMES sbsq'raxc- LIGHTING FIXTURE Filed Oct. 20. 1924.

h 7 INVg/VTOE Patented Jan. 5, 1926.

UNITED sra'rss M means PATENT orrice.

WHITMAN SYMMES, OF SAN FRAZL ICISCO, GALTFOBNIA, ASSIGNOR TO THOMAS DAY COMPANY, OF P'JAN FRANCISCO, CALIFSRN IA A CORPORATION OF CALIFGRNIA.

ELECTEIC-LFIGHTING FIXTURE.

Application filed October 20, 1924. Serial No. 744,554.

T all 10/ 20777, it may concern Be it known that I, VVHI'IMAN SYMMns, a citizen of the United States, and a resident of the city and county of San Francisco, State of California, have invented a certain new'and useful Electric-Lighting Fixture,

of which the following is a specification.

The invention relates to electric lighting fixtures and particularly to ceiling fixtures having a bowl or acorn of non-transparent translucent material which is illuminated by an electric lamp contained within the fixture. Fixtures of this type usually comprise a holder or shell to which the mouth of the bowl is attached and an electric lamp socket disposed within the shell into which an incandescent lamp is inserted. The depth of the holders, as they are invariably made, is such that the lamp projects almost entirely from the holder, so that the lamp filament is positioned below the center or adjacent the bottom of the bowl or acorn. This results in an uneven or streaked illumination of the bowl, which mars the appearance and illuminating effect of the fixture.

An'object of the present invention is to provide a fixture of this character, in which the filament of the electric lamp is so positioned with respect to the bowl that the bowl is evenly illuminated over its entire surface.

Another object of the invention is to provide an inexpensive fixture, comprising in part the fixture now generally used, to accomplish even illumination of the bowl.

The invention possesses other advantagoous features, some of which with the foregoing, will be set forth at length in the fol lowing description, where I shall outline in full that form of my invention which I have selected for illustration in the draw-' iugs accompanying and forn'iing part of the present specification. In said drawings I have shown one form of lighting fixture embodying my invention, but it is to be understood that I do not limit myself to such form, simie the invention, as set forth in the claim, may be embodied in a pluralityof forms.

Referring to said drawings: Figure 1 is a perspective View of a lighting fixture embodying my invention.

Figure 2 is a detail, in section, of a portion of the lighting fixture.

In accordance with my invention I arrange the socket above the 5 16 r h lder,

so that the position of the lamp with respect to the bowl is raised, thereby positioning the lamp filament at or above the center of the bowl and preferably in the plane of the greatest diameter of the bowl. The socket is preferably enclosed in a shell which is secured to the top of the holder, but may be secured to the holder in any desirable manner so that the socket is positioned entirely or substantially entirely above the holder.

The fixture shown in the accompanying drawings comprises a metallic shell or can opy 2, which is provided with means, such as the ring 3, whereby the fixture may be suspended from the ceiling. The canopy 2 is provided on its lower end with a skirt 4 of larger diameter than the body of the canopy and the skirt is joined to the body of the canopy by the integral shoulder 5. Disposed below the canopy is a holder 6 of increasing diameter downwardly, the lower end 7 of the holder being substantially of the same diameter as the mouth 8 of the bowl 9. The bowl is usually provided at the edge of its mouth with a bead 12 which engaged by thumb screws 13 to secure the bowl to the holder 6.

The holder (3 is provided at its upper end with an inturned flange 14 which is provided with a circumferential shoulder 15 against which the deflecting ring 16 bears. The ring 16 surrounds the holder 6 and conceals the ventilating apertures 17 therein, the lower edge of the ring being spaced away from the holder, to permit the pas sage of air. The ring 16 is provided at its upper edge with a shoulder 18, against which the lower edge of the skirt t bears. Tie canopy 2, holder 6 and ring 16 are secured together by bolts 19 extending through the shoulder 5 and the flange 14:.

Fitting into the body portion of the canopy 2 is an electric lamp socket 21, which receives the electric lamp 22, the flange 14: being provided with a central aperture to permit the lamp to be screwed into the socket. The lamp 22 is provided with a filanient 23 adapted to be heated to incandescence, and the position of the socket is such that the filament 23 occurs adjacent the piano of the greatest diameter of the bowl or adjacent or above the center of the bowl. This causes the filament to be positioned high up in the bowl 9, with the result that when the filament is heated, the bowl is evenly illuminated over its entire surface and the streaking effecteaused by the positioning of the filament at the lower part of the bowl is entirely eliminated. The body of the bowl 9 is of greater diameter than the mouth 8, so that light from the bowl is projected in all directions, except in that Zone which is shielded by the holder 6. By arranging the socket above the holder, a standard holder may be employed and the lamp s0 positioned, with respect to the bowl, that the bowl is evenly illuminated over its entire surface.

I claim:

A lighting fixture comprising a canopy having a body portion and a skirt of larger diameter than the body, connected to the body by a shoulder, an electric lamp socket disposed in said canopy and fitting into said body portion, a depending holder of increasing diameter downwardly, an inturned flange on the upper end of the holder, a shoulder on said flange, a ring engaging said shoulder, a shoulder on the ring against which the lower end of the skirt bears, bolts extending through said flange and shoulder and securing the holder to the canopy and a bowl of non-transparent translucent material attached to and depending from the lower end of the holder, the body of the bowl being of greater diameter than the lower end of the holder.

In testimony whereof, I have hereunto set my hand.

\VHITMAN SYMMES.

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