US1825121A - Lamp-holder - Google Patents

Description

Sept. 29, 1931. F. H. OWENS 1,825,121

LAMP HOLDER Filed May 5. 1929 g m I I 7.

IN VEN TOR.

MAN HOW N8 Jay 7 ATTORNE Patented Sept. 29, 1931 UNITED STATES PATENT" OFFICE FREEMAN H. OWENS, OF NEW YORK, N. Y., ASSIGNOR TO OWENS DEVELOPMENT COR- PORATION, OF NEW YORK, N. Y.,

A CORPORATION OF NEW YORK LAMP-HOLDER Application filed May 3, 1929. Serial No. 1360,2491

This invention relates to improvements in a lamp holder, the principal object of the invention being to provide a device for use in connection with apparatus in which a constant supply of light at a'fixed position is required, by means of which device, in case of the burning out or other functional failure of the lamp supplying such light, the defective lamp can be instantaneously 1O shifted out of position and a perfect lamp substituted therefor without any appreciable interruption of the light supply.

Other objects and advantages of the invention will appear as the description proceeds.

In the drawings accompanying this specification, V

Figure 1 is a plan view of a device embodying the features of the present inven- 20 tion, the frame or housing being shown in section taken approximately on the line l1 of Figure 3, two-different positions of the light shifter being illustrated in full and dotted lines respectively;

Figure 2 is a side elevation of the device, the housing being shown in section; and

Figure 3 is a side view of the device shown in Figure 1.

The same characters of reference desig- So mate the same parts in all the figures of the drawings.

Referring to the drawings, 1 designats a portion of a housing, which may be that'of a sound recording or reproducing apparatus 3: or any other device wherein it is necessary to have an uninterrupted supply of light at a predetermined position. Near the lower end of one side wall of the housing is provided an insulated bracket 2 in which is supported for rotary movement the lower end of a shaft 3. To the shaft 3 is secured immediately above the bracket 2 a base member 4, said member having adjustably inounted thereon a pair of light sockets 5 and 6, and below the base member, a spring contact member 7 is secured to the bracket in position to make contact with a lamp carried by whichever of the sockets 5 and 6 that happens to be in the operative position as 59 shown, in Figures 2 and 3, the relative angular position of the sockets being such that when one socket is incontacting position over thespring 7 the other socket is out of contacting position. The base-member 41 is provided with fiat faces8 and 9 at anangle socket in said position.

In order to permit the ready removal of the entire device from the housing, the operating shaft is made in two parts, the upper part 3a being journaled in the top wall of the housing in an insulatingbushing 3b and provided outside of said wall with an operating knob or button 11. The parts 3 andBa are connected by an insulated sleeve 12 secured to the part 3a and'provided with diametrically opposite slots 13 opening at the end of the sleeve for engagement with a transversely extending pin 14.- carried by the shaft 3 whereby the parts 3a and 3 will be rotated together. In order to prevent accidental disengagement of the parts 8 and 3a, a coil spring 15 wound around the part 3a bears at one end on the sleeve 12 and at its opposite end on the top wall of the bushing 31), as shown clearly in Figure 2. It will thus be seen that a positive lifting action of the part 3a is necessary to separate the parts 3' and 3a, and when the parts, are so separated, the part 3, together with the base 4 and lamp sockets, can be lifted out of its bearing in the bracket 2.

In operation one of the sockets, for instance the socket 5, carrying a lamp 16 is in operative position so that the contact portion of the lamp is in engagement with the fixed spring contact 7, in which position it is positively held by the engagement of spring 10 with the flat surface 9 of the base member 4:. If for any reason the lamp 16 should fail, it is necessary only to turn the shaft by means of the knob 11 to bring the other socket 6 having a lamp therein into operative position over the spring contact 7, in which position it is maintained by engagement of spring 10 with the flat face 8 of the base member.

Having thus described my invention, What I claim is:

1. A lamp holder, comprising a movable base having a plurality of lamp-carrying sockets adjustably secured thereon, means for moving said base to bring the lamps carried thereby succesively into a predetermined operative position, flat stop faces formed on said base corresponding in number to said lamps, a resilient member adapted to engage said stop faces successively thereby positively to retain the base in position for each successive lamp, and a fixed contact member beneath said base for engagement by said lamps when moved to operative position.

2. A device of the char eter described comprising a housing, a shaft mounted for rotation therein, a base member secured to said shaft for rotation therewith, a plurality of lamp sockets disposed on said base in angular relation to each other, means for rotating said shaft thereby to move said lamp sockets in an angular path, a fixed electrical spring contact member disposed in position to be engaged successively by the lamps in said sockets, said base having a plurality of flat faces formed thereon one for each of said lamp sockets, and resilient means for engaging said faces and positively retaining successive lamps in contact-engaging position.

In testimony whereof, I afiix my signature.

FREEMAN H. OWENS.

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