US1239038A - Semi-indirect-lighting device. - Google Patents

Description

A. S. POWELL- SEMl-INDIRECT LIGHTING DEVICE- APPLICATION FILED DECJ. 191s.

Patented Sept. 4, 1917.

,To all whom it may concern:

a citizen of the United "UNITED STATES PATENT ,oFFIoE.

ALFRED B. POWELL, OF NEW YORK, N. Y.

SEMI-INDIBECT-LIGHTING DEVICE.

Specification of Letters Patent.

Patented Sept. 4, 191 7.

Application filed December 4, 1916. Serial No. 184,878.

Be it known that I, ALFRED S. POWELL, I States, residin at New York, in the county of Kings and tate of New York, have invented certain new and useful Improvements in Semi-Indirect- Lighting Devices, of which the following is a full, clear, and exact description.

This invention relates to the art of semi indirect lighting, and its object is to pro vide improved means by which the glass reflector and glass difl'using bowl can be supported in osition about the source of light (say a gas urner or an incandescent electric lamp) without either of them being sub jected to other stresses than those incident to supporting its own weight. The liability of breaka e of the glamware is thus reduced to the minimum. To this end the invention consists in the novel features hereinafter described.

The preferred form of the invention' is illustrated in the annexed drawing, in which wardly, so that at its Figure 1 is a persdpective view of the allmetal supporting evice. Fig. 2 is a sectional view showing the reflector or shade and the diifusihg bowl in place.

The supporting device shown in Fig. 1 con sists of a sheet metal annulus A, formed at upper edge with a circumferential indentation B constituting a groove to receive the screws of the usual supporting gallery as describedbelow, and at its lower edge the annulus is provided with means for sup orting a centrally apertured reflector or s ade, in the present'instance an outwardly extending integral flange C. The partsnamed are conveniently formed from a single piece of sheet metal by stamping or spinning or both.

The arms D are attached to the annulus at their upper ends, as by riveting, and extend downwardly, then outwardly and upabout the points E they are rather lower than their outer ends. The outer extremities of the arms are bent downwardly and inwardly to form inwardly disposed hooks F.

In applying the device shown to a source of light, for example an electric lamp G, Fig; 2 a centrally apertured reflector or shade ,is passed down over the annulus so that the inner edge of the shade rests on the flange C. The annulus is. then placed J (three or more in number) are seated in the groove B. The annulus is thus safely supported without the slightestpressure by the fitter screws on the shade. The bulb G can now be inserted in the socket, after which the arms D are spread slightly to receive the outwardly" extending edge or flange K of the difi'using bowl L. The arms I) are made of stiff metal so thatfthe weight of the bowl will not cause themvto spread. Both glass pants are thus held securely in position, but neither is obliged to carry more than its own weight. Preferably the shade is of smaller diameter than the bowl so that the shade will be concealed when the device is suspended overhead, and it is also made of translucent glass so that no shadows will be cast on the ceiling by the arms D; this effect being aided by having the arms as far aspossible from the shade. The desired position of the arms is attained by giving them the downward, outward. and upward curvature shown, instead of having them extend'practically straight from the annulus to the edge of the bowl. For the sake of ventilation, to avoid overheating of the glass parts, the shade shown is made small enough to leave an. annular space M between its outer edge, and the top of the bowl.

What I claim as my invention and desire to secure by Letters Patent is:

device for semi-indirect lighting by which a glass. reflector or shade and a glass diffusing howl can be supported by metal parts without either glass member being subjected to the weight of the other, said device consisting of an annulus formed at its upper edge with a circumferential indentation constituting a groove to receive the screws of a supporting gallery or fitter, said annulus having also means at its lower edge to support a centrally apertured reflector or shade by the inner edge thereof; and a plurality of depending arms of stifl! spring metal attached '60 the annulus at their upper ends, said a1 ms extending downwardly and outwardly and having their lower" ends bent to form inwardly disposed hooks to engage an outwardly projecting/edge on an upwardly open diflusing bowl,

In testimony whereof I,hereunto aflix my signature. p \O ALFRED s; P ELL.

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