Patents Assigned to Sumari Engineering
  • Patent number: 4239987
    Abstract: This relates to an electronic circuit which is designed to supply 115 volts AC power to loads of up to 550 watts for a predetermined time period of wide latitude. An "on" cycle is initiated by momentary closure of an external control line pair with a closed contact current flow of less than one half milliampere. The "on" controller may be located at any convenient distance from the load switching circuit and may be a coin operated switch. The electronic power control circuit is fabricated from discrete components including one integrated circuit installed on a printed circuit board (17/8".times.27/8") which is finally encapsulated in a hermetically sealed 2".times.3" module suitable for operation in a moist or corrosive environment.
    Type: Grant
    Filed: October 13, 1978
    Date of Patent: December 16, 1980
    Assignee: Sumari Engineering
    Inventor: Patrick M. Heffernan