Devices for securing electric bulb lamps in their sockets

摘要

508,217. Two-part coupling. BAILEY, N., and FOULDS, J. R. Jan. 3, 1938, No. 66. (Class 38 (i)] A bayonet-cap lamp 2 is looked in its holder 5 by an, annular member 10 having internal projections 8 that enter the bayonet slots 4a to prevent the escape of the bayonet pins 7, the member 10 being secured by a ball 11 engaging the holder 5 and being clamped by a. screw 15. The screw has a head shaped to fit a special key, and it may be located in a recess that can be sealed with soft metal or other material. A spring 15a may be held against the ball 11 by a screw plug 16 to' provide preliminary pressure on the ball. An insulating-shield may surround the holder.