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TIME DELAY SWITCH

  • US 3,660,792 A
  • Filed: 12/16/1970
  • Issued: 05/02/1972
  • Est. Priority Date: 12/16/1970
  • Status: Expired due to Term
First Claim
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1. A fail safe switch comprising a support having first and second spaced terminals, a heater element for connection to an external source of heater current, third and fourth terminals on the support and connected to respective ends of the heater element, a bimetallic element adjacent said heater element and connected to said first terminal, a conductive strip adjacent said bimetallic element and mounted on said support in normally nonconductive relation to any of said terminals, and a contact member adjacent said strip and connected to said second terminal, said bimetallic element and conductive strip being normally spaced out of electrical contact with one another, and said conductive strip and contact member being normally in electrical contact with one another.

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