US1546050A - Light fixture - Google Patents

Description

LIGHT FIXTURE Filed Sept. 27,1922

Inventor Gomuzell A.B.Hlvm J;

Rh Attorney.

' is one continuous piece.

Patented July 14, 1925.

UNITED STATES PATENT OFFICE.

ERAL ELECTRIC COMPANY; A CORPORATION OF NEW YORK.

menu. FIXTURE.

Application filed September 27, 1922. Serial No. 590,982.

To all whom it may com-em:

Be it known that I, CRoMwELL A. B. HAL- VORSON, J12, a citizen of the United States, residing at Lynn, county of Essex, State of Massachusetts, have invented certain new and useful Improvements in Light Fixtures, of which the following is a specification.

My invention relates to improvements in light fixtures for flood lighting; that is for distributing the light over a certain restricted zone or zones. Hereto-fore, fixtures of this kind have been made with certain elements for reflecting purposes and with certain other additional elements for r e fracting purposes; each separate and separately mounted. and therefore calling for complicated mounting equipment. Among the objects of my invention are :to provide an improved flood lighting device combining the reflecting and refracting elements all in one unit; to provide a device of- :the above general character which is simple inconstruction, cheap to manufacture and with simple mounting equipment; and to provide other details of improvement all of which are hereinafter more fully set forth and claimed in the accompanying specification, reference bein had to-the accompanying drawing in which Fig. l is a view in elevation of the fixture of my invention shown partially in section to more clearly illustrate the reflecting and refracting elements and their relation to the light source; Fig. 2 is an enlarged detail section of the reflector part of the-unit. Referring more in detail to the drawing, it will be seen that I provide a main flaring globe holder 2 which it will be understood may be adapted to fit into any suitable standard or pendant depending upon whether the unit is to be stationary or otherwise. Within the holder is hung or secured the lamp 3 within which latter is the source of light 4. Surrounding the lamp is the globe proper which is made of glass and This globe has an upper curved sloping section 5 the outer surface of which is covered by a light reflecting silver surface 6. Depending from the reflector section 6 is an annular section 7 the outer surface of which is rippled. These ripples may be considered as irregular branching lens like ridges and depressions the function of which is to diffuse the light rays within a given zone. Sloping upwardly and toward the center of the hood fromthe lower edgeof the surface 7 there is a conical surface 8 the outer portion of which is also covered by a reflecting surface of silver 9. This conical surface is truncated and nestling on the top of this truncated cone there is another surface 10 concavo-convex in form the convex portion of which projects downwardly. The concave side of this surface is also rippled after the fashion of the surface 7. With the above arrangement the rays from the source of light pass through the glass section 7 and are refracted in a general downwardly directlon forming an inclined conical zone of light. Certain of the raysof light are first reflected by the silver surface 6 onto the second silver surface 9' from which they are again reflected through the wall 7 as indicated by the dotted lines 11. All of the rays that pass through this wall whether they come direct or whether they are reflected, are scattered or diffused in a general downwardly inclined conical zone. Certain other of the rays of light pass directly from the source of light 4 through the concavoconvex bottom surface 10 being diffused in passing through this surface over a second conical zone the apex of which is somewhere in the neighborhood of the light. The reflecting surface may be prepared by a chemical deposit of silver 12 (Fig. 2) over which as a protection to the silver a comparatively heavy layer of copper 13 is also deposited. This copper deposit is carried over the ribs 14:, 15 and 16 (Fig. 1) for the purpose of securely anchoring the deposits to the glass surface.

As shown in Fig. 1, the upper part of the globe is provided with a suitable groove 17 on the outside of the neck portion of the globe for the purpose of securing the globe to the globe holder through the medium of suitable screws 18. As I have indicated in the drawing (Fig. 1), the upper surface 5 is curved into a parabolic surface. On the other hand, the reflecting surface 8 is a conical reflecting surface. The relation of the surfaces 6 and 8 to each other are such that all rays of light from the light source 4 that strike the surface 6 are reflected onto the surface 8 from which latter surface they are reflected through the refracting or diffusing wall 7.

It will be understood that I contemplate also making a globe which encloses the light

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