GB191101707A - Electric Incandescent Lamp with Interchangeable Carrier for the Filaments. - Google Patents

Abstract

1707. Bloch, A. Jan. 23. Filaments, supports for; repairing; leading- in wires; bulbs; making lamps. - The filamentcarrier is made detachable, contact springs being provided on one or both of the engaging parts. In the arrangement shown in Fig. 1, a carrier 3, fitting into a thimble 6 on the bulb, is provided with two springs 7 for gripping a metal ring 8 on the thimble. In a modification, t h e thimble projects out from the bulb and c a r r i e s leading- in contacts on its interior, or is replaced by a rod fitting into a tubular carrier engaging springs on the bulb. The thimble and carrier may be connected by cement, or a contact plug may be fixed on the carrier for engagement with a threaded sleeve 13, Fig. 6, located in the thimble. The sleeve 13 may be sprung into the thimble, or may have an extension 16 abutting against a platinum leading-in wire 17, the surrounding glass being flattened by pincers while hot. In another modification, a carrier fused to the bottom of the bulb is provided with two springs on its free end to abut against a pair of leading - in springs; the carrier may be tubular and project beyond the bulb wall. In replacing the carrier, the bulb is cut at 18, a tube being sealed over the opening in reclosing ; or the tubular carrier last described may serve for exhausting and closing the bulb.