Theft proof alarm bell assembly
US4631526A · kind A · utility
1Cited by
1References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1985 |
| Grant date | Dec 23, 1986 |
| Priority date | — |
| Expiry date | Dec 20, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B3/10
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An alarm bell assembly wherein the working parts are located beneath and protected by the gong, and preferably also a cover for the assembly, being secured by means comprising a detector such as a micro-switch by which alarm drive is actuable when the bell is tampered with. A rechargeable battery is connected to an external control circuit such that the battery remains fully charged and supplies the alarm drive if the control circuit connection is severed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.