Patents Assigned to Comtelco (U.K.) Limited
  • Temperature sensitive trip device
    Patent number: 4034326
    Abstract: A temperature sensitive-trip device for use on an electrical surge arrestor and comprising a resilient contact member mounted on the arrestor and having a fusible material solidified in contiguous relationship therewith to hold contact member biassed so that on melting of fusible material, contact member is urged to a position in which it shorts the electrodes of the arrestor.
    Type: Grant
    Filed: April 17, 1975
    Date of Patent: July 5, 1977
    Assignee: Comtelco (U.K.) Limited
    Inventors: John Hill, Henryk Turczanski
  • Apparatus for reed switch manufacture
    Patent number: 4004337
    Abstract: The invention relates to a method and apparatus for the encapsulation of a switch contact sub-assembly, in which sub-assembly at least two contacts are rigidly joined in a desired spatial relationship by a destructible bridging piece, wherein the sub-assembly is inserted into a glass tube continuously purged with inert gas and the tube sealed to the sub-assembly by heating two spaced apart regions thereof followed by removal of surplus tube and, in a further aspect of the invention, destruction of the bridging piece.
    Type: Grant
    Filed: April 29, 1975
    Date of Patent: January 25, 1977
    Assignee: Comtelco (U.K.) Limited
    Inventors: John Hill, Henry Turczanki
  • Duplex surge arrestors
    Patent number: 3958154
    Abstract: This invention relates to a duplex surge arrestor comprising two gas-filled surge arrestors showing commoned electrodes through which commoned electrodes extends a passage for conveying ionised gas from one arrestor to the other, and in which duplex surge arrestor the electrodes are of such shape, disposition and material that when an excessive dissipation of energy occurs on any two electrodes therein, the discharging electrodes melt and fuse together.
    Type: Grant
    Filed: November 20, 1974
    Date of Patent: May 18, 1976
    Assignee: Comtelco (U.K.) Limited
    Inventors: John Hill, Henryk Turczanski, Frederick Henry Wallis