Improvements in or relating to Switches for Electric Incandescent Lamps.

  • Inventors: ARMAND FREY
  • Assignees: Armand Frey
  • Publication Date: February 09, 1905
  • Publication Number: GB-190429307-A

Abstract

29,307. Frey, A. Dec. 31. Incandescent lamps, adapters for, containing thermal switches for the purpose of making and breaking the circuit periodically. The adapter, Fig. 1, is made in two parts, an upper part a similar to the socket, and a lower part c like the cap of an ordinary lamp. The switch l in the lower part c is composed of a bent compound metal strip, usually iron and brass, attached to the pin i, and with a contact-screw n through one end of the strip, a heating-coil o insulated from the strip, and a metal contact-plate m, likewise insulated. When the strip is cold, the end of the screw n is in contact with the plate m, and current passes from one contact-pin g of the lamp through the pin i, bent strip, contact-screw n, contact-plate m, and beating-coil o to a terminal. The bent strip unbends as it grows hot and breaks circuit, which is restored as it coo's down, and a periodic make-and-break is kept up.

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    Publication numberPublication dateAssigneeTitle
    EP-0056104-A1July 21, 1982Steinel GmbH & Co. KGOrientation lamp