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Key security device

  • US 5,051,724 A
  • Filed: 05/31/1990
  • Issued: 09/24/1991
  • Est. Priority Date: 05/31/1990
  • Status: Expired due to Fees
First Claim
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1. A key security device for releasably holding a key having an elongated blade extending from a bow end, a shoulder on one longitudinal edge of the blade, and a ward groove extending longitudinally along a side surface of the blade, the device comprising:

  • a housing;

    an elongated keyway formed in the housing with an open end for receiving the key blade longitudinally;

    a bar in the housing for holding the key blade against lateral movement within the keyway;

    a latch on the housing selectively operable between a locking position in engagement with the key to releasably lock the key to the housing and a release position allowing the key to be withdrawn from the keyway; and

    an alert device within the housing responsive to insertion and removal of the key from the housing for producing an identifiable alert signal after a selected time interval initiated in response to removal of the key from the keyway, and for resetting the selected time interval and cancelling the alert signal responsive to reception of the key in the keyway.

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