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DEVICE FOR CONNECTING A SUBSTITUTE CURRENT PATH IN CASE OF LINE BREAK

  • US 3,652,867 A
  • Filed: 05/28/1970
  • Issued: 03/28/1972
  • Est. Priority Date: 05/28/1970
  • Status: Expired due to Term
First Claim
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1. In a system including at least first and second seriesconnected devices, each of said devices having at least one terminal and a line connecting said first device terminal with said second device terminal, the improvement which comprises DC circuit means for defining a normally closed DC circuit including said line and a ground path;

  • first switch means for providing a pulsating current path between said first device terminal and ground when said DC circuit is opened by a break in said line; and

    second switch means for providing a pulsating current path between ground and said second device terminal when said DC circuit is opened by a break in said line, said first and second switch means and said ground path providing an AC path between the first device terminal and said second device terminal when said line is broken.

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