Patents Assigned to Sandra Roberts
  • Patent number: 4364003
    Abstract: A logic control and safety circuit for an electrically actuated gate, or the like. Upon command, a counter directs pulses from a free running oscillator of selective frequency to timer and motor control circuitry, effecting sequential gate operations. The normal gate sequence includes open, pause, and close cycles. Electro-mechanical and electrical safety features are included should the gate encounter an obstruction during either the open or the close cycles, or fail to complete a cycle for any reason. Automatic reset circuitry advances the gate through a "close" cycle following a power failure.
    Type: Grant
    Filed: September 16, 1980
    Date of Patent: December 14, 1982
    Assignees: Mary A. Baldwin, Bernard J. Favaro, Sandra Roberts
    Inventor: Gregory F. Phipps