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ALARM ATTACHABLE TO A DOOR

  • US 3,768,086 A
  • Filed: 11/22/1971
  • Issued: 10/23/1973
  • Est. Priority Date: 11/22/1971
  • Status: Expired due to Term
First Claim
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1. An alarm attachable to a door, said alarm comprising a housing, a battery operated alarm device including an operating circuit, the device and the circuit within the housing, a first member including a control arm and supported within said housing for movement between an inoperative position, an operative position and an intermediate set position, said member operable to effect the closing of the circuit in said operative position and the opening of the circuit in said other positions, an actuating member within and supported by said housing for movement between a first position and a second position during which movement it engages and shifts said control arm to move said first member from its set into its operative position, said control arm being disengaged from and unaffected by return movement of said actuating member when the first member is in its operating position, a spring within the housing urging the actuating member into its second position, said actuating member including a head held in its first position when the door is closed but extending outwardly of the housing when the door is opened to a predetermined extent, said control arm being within the housing in the operative position of said first member and exposed in said other positions, and means carried by the housing and operable to return the first member from its operative position to another of said positions.

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