Patents Assigned to Altus Technology Corporation
  • Capacitance level sensor for a bilge pump
    Patent number: 4881873
    Abstract: A bilge pump switch sensing the presence of bilge water by measuring the density of water by using an ultrasonic field penetrating the water, the field extending through the housing of the switch. Thus the internal elements of the switch are isolated from any contact with the water. The ultrasonic field detecting the presence of water activates sensing means in said switch housing to activate the pump, delay means being provided against false pump starts due to wave action as caused by a rocking boat.
    Type: Grant
    Filed: December 14, 1988
    Date of Patent: November 21, 1989
    Assignee: Altus Technology Corporation
    Inventors: Leonard S. Smith, Gary L. Cook