US2117188A - Electric lighting fixture - Google Patents

Description

y 8- J. MARKEL ET AL. 4 2,117,188

ELECTRIC LIGHTING FIXTURE Filed Oct. 28, 1956 INVENTOR Joseph Marizel am? Duane ,Zjtlple Z9 2 m 4 BY W A'rio lzv Patented May 10, 1938 UNITED STATES PATENT OFFICE ELECTRIC LIGHTING FIXTURE Joseph Markel and Duane L. Ripley, Buffalo, N. Y., assignors to Markel Electric Products, Inc., Buffalo, N. Y., a corporation of New York Application October 28, 1936, Serial No. 108,046

1 Claim.

This invention relates to improvements in electric lighting fixtures of the kind wherein a light modifying means is carried by the socket for the lamp. Although not necessarily limited to such 5 use, the features of the invention may be employed to advantage in connection with the application of a reflector, either opaque or translucent, to fixtures of the wall bracket type.

One object of the invention is a fixture in which provision is made for facilitating the attachment of the light modifying means.

A further object is to provide a construction which will enable the features of the invention to be employed in connection with standard fixture parts.

A still further object is to providea novel design and arrangement of the parts of the fixture, whereby simplicity and economy in construction are obtained.

The invention is illustrated in the accompanying drawing in which:

Figure l is a perspective View, partially in section, of a fixture embodying the features of the invention.

Figure 2 is an enlarged section taken along line 2-2 of Figure 1.

Figure 3 is a similar section taken along line 33 of Figure 1.

Figure 4 is a fragmentary section taken along line 4-4 of Figure 2. v

Figure 5 is an enlarged fragmentary section taken along line 5-5 of Figure 2.

The features of the invention are illustrated, by Way of example, in connection with a fixture of the wall bracket type, the lamp for the said fixture being indicated at 6. The socket l for the lamp is carried by an arm 8 (Figure 1) which is fixed to a plate 9, the said plate being available to mount the fixture upon a wall or other supporting surface. A reflector l and a shade H are associated'with the lamp 6, the said reflector being carried by the socket 1 and preferably being formed of a translucent plastic material, whereby to permit a part of the light from the lamp 6 to pass through it. The shade II is supported by the reflector and to this end is formed with an internal bead l2 which rests upon the rim of the reflector.

The socket l, as illustrated, is of conventional 50 design, being of the type which is provided with a threaded section 13. In accordance with the invention the reflector I0 is mounted upon the socket by an adapter M, the latter being formed with a threaded neck l which is screwed upon the threaded section I3 of the socket. The body l6 of the adapter is preferably of a substantially greater diameter than the socket 1, whereby to provide an annular space I! between it and the said socket. Bayonet slots I8 are formed in the body l6 of the adapter to accommodate opposed inwardly extending projections l9 which are formed or provided upon the reflector Ill, the said slots being diametrically opposed as are the projections. An opening 20, which is of a diameter substantially the same as that of the outside diameter of the body 16 of the adapter, is formed in the bottom of the reflector, it being noted that the projections I9 extend into the said opening. The body I 6 of the adapter has a conforming fit in the opening 20 while the projections l9 extend into the space I! and terminate short of the socket as best shown in Figure 4.

In assembling the parts of the fixture, assuming that the adapter I4 is screwed into position upon the socket, the reflector is adjusted so that the projections l9 will enter the open ends of the slots I8. When this adjustment is made, the reflector is moved to cause the body l6 of the adapter to enter the opening 2|] until the projections l9 encounter the bottoms of the slots l8. The reflector is then rotated to cause the projections to move under the overhanging portions 2! which define the lateral extensions of the slots. Preferably, the said extensions are slightly tapered so that as the projections approach the closed ends thereof they are wedged tightly between the upper and lower walls.

From the foregoing it will be apparent that the projections [9 support the weight of the reflector and hold it against accidental angular displacement. At the same time the engagement of the wall which defines the opening 20 with the body of the adapter prevents the reflector from rocking on the projections. The reflector, therefore, is secured tightly to the socket. The formation of the reflector from a plastic material has the advantage that the possibility of injury to the projections I9 is minimized. The construction is simple and economi cal and enables the use of sockets of standard design if this is desired. A further advantage obtained is that the reflector and associated parts may be assembled with facility.

What is claimed is:

The combination with a fixture having a lamp and a socket for said lamp, said socket having a threaded section, of a bowl-shaped reflector for modifying the light from said lamp, said reflector being formed with an opening and having projections which extend into said opening and an adapter for mounting said reflector upon said socket, one end of said adapter being reduced in diameter and being threaded toco-operate with the threaded section on said socket, the other end of said adapter having a relatively close fit in said opening and being spaced from said socket, said other end having bayonet slots formed therein, said projections extending through said slots and into the space between said adapter and socket to secure the said parts in co-operating relation.

JOSEPH MARKEL. DUANE L. RIPLEY.

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