Door-open alarm device, specifically for a refrigerating...

Details Door-open alarm device, specifically for a refrigerating... Door-open alarm device, specifically for a refrigerating...

G - Physics

08

B

340/124

G08B 21/00 (2006.01) F25D 29/00 (2006.01) G08B 21/18 (2006.01) H01H 3/16 (2006.01)

Patent

CA 1203302

PHF 81/572 -9- ABSTRACT Door-open alarm device, specifically for a refrigerating appliance, comprises an alarm means con necked to an electric circuit which comprises, arranged on a stationary part of the appliance, a voltage source, a switch with two positions in which the circuit is interrupted and closed respectively, electrical time delay means which when a current flows in the circuit produce a voltage variation across said alarm means after a delay, thereby triggering the alarm meams and, arranged on a door of the appliance, a mechanical actuat- ing element for the switch,which opens the switch when the door is wide open or closed; and which closes the switch when the door is ajar.

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