Batteryless sensor used in security applications
US5317303A · kind A · utility
29Cited by
7References
10Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 11, 1992 |
| Grant date | May 31, 1994 |
| Priority date | — |
| Expiry date | Sep 11, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B25/10
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A batteryless sensor includes a small and concealed permanent magnet motor which operates as a generator to convert rotational or translational energy to an ersatz Vcc transient power supply via a mechanical arrangement to radiate a coded VHF oscillator signal to a repeater or central processing unit located as far as one mile from the sensor. The receiver is able to monitor a multiplicity of sensor units over a given time period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.