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Door-open alarm device for a refrigerating appliance

  • US 4,528,558 A
  • Filed: 06/30/1982
  • Issued: 07/09/1985
  • Est. Priority Date: 07/09/1981
  • Status: Expired due to Fees
First Claim
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1. A door-open alarm device for a household appliance provided with a door and a stationary part on which the door is movably mounted, said device comprising:

  • arranged on the stationary part of the appliance, alarm means connected to an electric circuit comprising a voltage source, a switch having first and second positions which correspond to the electric circuit being interrupted and closed respectively, electrical means providing a time delay in response to a current flow in the electric circuit and after a time delay producing a voltage variation across said alarm means, thereby triggering said alarm means and, arranged on the door, a mechanical actuating element for operating said switch, said actuating element opening said switch when the door is wide open or closed, and closing said switch when the door is ajar.

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