Window security device
US4755800A · kind A · utility
0Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1987 |
| Grant date | Jul 5, 1988 |
| Priority date | — |
| Expiry date | Jul 13, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/04
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A window security device which operates on differential gas pressure theory to trigger an alarm upon pressure equalization. A plug which completes the electric activator circuit includes biasing springs or similar devices to urge the plug out of contact with the activator circuit to trigger the alarm upon disturbance or breakage of one of the window glazing panels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.