Patents Assigned to C. Ellson & Co. Ltd.
  • Submersible thermostatically controlled heaters
    Patent number: 4107514
    Abstract: Instead of the usual glass case the heating element and thermostat of a submersible thermostatically controlled heater are disposed in separate cases made of metal and plastics respectively which are secured together in liquid-tight manner with the heating element connected through the thermostat to an external source of operating current and the metal case for the heating element connected to earth.
    Type: Grant
    Filed: January 27, 1977
    Date of Patent: August 15, 1978
    Assignee: C. Ellson & Co. Ltd.
    Inventor: Walter Gill Ellson