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US 4,023,157 AGranted
Theft alarm for portable articles
AssigneeEngineering Systems Corporation
InventorAlbert J. Miller
Life of this patent
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Abstract
A theft alarm for portable articles includes a pocket-sized housing from which extend a pair of opposed, pivotting jaws. One of the jaws is secured to an extendable ratchet shaft disposed within the housing. A cam rotated by a key lock device actuates a pawl which selectively retains the ratchet to lock the jaws about the article. The cam also actuates a leaf switch which activates a motion-sensing electronic circuit. The circuit actuates a pulsating audible alarm whenever the article is moved.
Claims15
A theft preventing alarm device for a valuable article, comprising:
- motion sensing means for sensing movement of said valuable article and generating an alarm actuating signal in response to said movement,
- alarm means, connected to said motion sensing means, for generating an alarm signal upon receiving said alarm actuating signal,
- a pair of pivotable clamping jaws variably spaced apart to secure said device to said valuable article,
- retaining means for releasably retaining said jaws in a predetermined spaced relationship, and
- lock means for both arming said alarm means and actuating said retaining means.
2 more elements
Dependencies are inferred from the claim text.