×

Ground fault monitor circuit

  • US 4,710,751 A
  • Filed: 04/24/1986
  • Issued: 12/01/1987
  • Est. Priority Date: 04/24/1986
  • Status: Expired due to Term
First Claim
Patent Images

1. A fault monitoring system comprising,a wrist strap monitoring circuit connected to monitor the grounded status of an operator at a workstation;

  • a proximity monitoring circuit connected to monitor the presence status of a person in proximity to said workstation;

    at least one surface monitoring circuit connected to monitor the grounded status of a surface related to said workstation;

    logic circuit means connected to each of said wrist strap monitoring circuit, said proximity monitoring circuit and said at least one surface monitoring circuit to receive signals therefrom which signals are representative of the status monitored by the respective monitoring circuit; and

    alarm means connected to be selectively activated by said logic circuit means when one or more of said monitoring circuits produces a signal indicative of a prescribed status condition thereat.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×