Patents Represented by Attorney Vincent J. Sunderdick

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  • Extremely low power zero crossing circuit
    Patent number: 5416404
    Abstract: A circuit for operating relay contacts is based upon the utilization of an AC line zero voltage to provide a relay contact closure. The circuit is inexpensive and draws extremely low current levels. The circuit involves a latching arrangement of gates responsive to a zero crossing detector and a Delay Time output from a sensor. The gating circuits function in a latching arrangement which has an adjustable output to energize a relay and in turn provide for the closing of contacts which occurs substantially at zero voltage.
    Type: Grant
    Filed: March 24, 1994
    Date of Patent: May 16, 1995
    Assignee: Hubbell Incorporated
    Inventor: John R. Baldwin