Theft alarm for portable articles
US4023157A · kind A · utility
20Cited by
5References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 18, 1976 |
| Grant date | May 10, 1977 |
| Priority date | — |
| Expiry date | Oct 18, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/1436
- WIPO fieldControl
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.