US2146591A - Portable lamp - Google Patents

Description

Feb. 7, 1939.

A.` B. oDAY PORTABLE LAMP Filed June 27, 1935 zlf:

/7/6 zal Inventor* Avth Uf- B.' Oday,

Patented Feb. 7, 1939 PATENT OFFICE PORTABLE LAMP Arthur B. Oday, Cleveland, Ohio, assignor to General Electric Company, a corporation of New York Application June 27,

2 Claims.

My invention relates to so-called bridge lamps. One of the features of my lamp is that it comprises the combination of an incandescent lamp support arranged so that the lamp is supported base upward and is provided also with a suitable shield and light transmitting and diiusing screen so as to prevent glare especially when the lamp is tilted. Another feature is the combination of the aforesaid parts with a suitable shade or rel0 ilector. Other features and advantages of my invention appear from the description which 'follows of species thereof and from the accompanying drawing. v

In the drawing, Fig. 1 is a side elevation partially broken away of the lighting unit of my invention; Fig. 2 is a plan view of one half of said unit; and Fig. 3 is a side elevation partially broken away of a portion of a modification of the lighting unit of my invention.

The lighting unit of my invention shown in Figs. 1 and 2 comprises a shade I0 of frusto-conical form which is preferably made of a translucent material such as parchment or heavy paper and which is coated on the inside with a white 2B paint of high reflecting factor. The shade I0 is stiifened with wires II and I2 located in the upper and lower edges respectively and is supported through three radially extending wires I3 which are attached to wire II and a collar I4.

30 The collar I4 is preferably provided with threads by which it is screwed into the shell of the electric lamp socket I5 and supports in conjunction with the wires I3 the translucent screen I6 which is preferably of opal glass.

35 screen I 6 is provided with an aperture for the socket I5 and covers over the entire open space between the shade I0 and the socket I5. The screen I6 is held in place by the broken ring I'I which springs outward into the indentations in ,40 wires I3 and prevents direct illumination from the light source I8 mounted in the socket I 5 from passing upward from the lighting unit. The translucent material of the screen I6 causes some of the light to be reflected downward so that it will pass out the bottom opening in the shade I0. A shield I9 is mounted below the light source I8 in a position to intercept all illumination which would otherwise pass directly out the bottom opening in the shade I0 from the light source I8. 50 The shield I9 is supported by a pair of wires 20 extending downward from wires I3 which pass through apertures in the shield and are bent back forming a loop, and by wire 2| which extends downward from one of the wires I3 and-engages u the edge of the shield. Wire 2| has an indented The translucent 1935, Serial N0. 28,619

(Cl. ,Z110- 81)v portion in which the edge of the shield I9 rests and may be sprung back so that the shield can' be tilted and a new light source inserted in the socket I5. The shield I9 preferably has a very good reflecting surface on the inside and has 5 either an oxidized aluminum or painted surface on the outside so that it will pick up light from the shade and be less conspicuous.

The outside of the shade should be treated Vso that the differences in brightness of the various 10 portions of the unit are not objectionable. In this instance, the dark area 22 of the shade I I) resulting from the position of the shield I6 is separated from the remainder of the shade by opaque bands 23 and 24. The lighting unit is l5 shown in the drawing attached to a bridge lamp type standard 25 through arm 25 through which its advantages may best be realized since the Alamp is usually tilted.

'I'he modified lighting unit of my invention 20 shown in Fig. 3 differs from the preceding unit principally in its method of mounting. In this instance, the collar I4 is screwed on the socket extension 26 which is provided with one portion 25 for screwing into a lamp socket and which vpro- 25 vides a socket into which the light source I8 can be screwed. The top of the shade III is extended upward farther so that it will take the same position with reference to thelighting standard as the shade of the lighting unit previously de- 30 scribed. Bands 21 and 28 are placed on the vshade IU'to separate the comparatively light and dark areas.

What I claim as new and desire to secure by Letters Patent of the United States is:

' 1. In a lamp of the character described, the combination of a standard and an arm extending therefrom, a socket supported by said arm and adapted tosupport an electric lamp, base upward, a shade supported by said sockets, a shield 40 disposed below said electric lamp, a plurality of wire supports connecting said shield and shade, and a light transmitting and diffusing screen supported between said shade and said socket, at least one of said supports having a loop at its end extending through a hole at the rim of said shield and at least one other of said supports detachably engaging the rim of said shield to permit said shield to be swung downward for insertion of said lamp.

2. In a lamp of the character described, the combination of a standard and an arm extending therefrom, a socket supported by said arm and adapted to support an electric lamp, base upward, a collar mounted on said socket, 'a frusto- 55 conical shade surrounding said electric lamp to reflect the light therefrom downwardly, a plurality of wires extending radially outward from said collar and engaging the upper end of said shade to support it, a at light-transmitting and diffusing screen covering the opening at the upper end of said shade and having a central opening through which said socket extends, said screen being supported by said radially extendingwires,

a shield disposed below said electric lamp to pre-l vent the downward projection of direct light from said lamp, and a plurality of wires extending downward from said radially extending Wires and engaging said shield to support it, at least one of said downwardly extending wires being detachable to allow tilting of said shield for insertion of said electric lamp.

ARTHUR B. ODAY.

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