Movement sensor
US4688025A · kind A · utility
15Cited by
5References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 5, 1984 |
| Grant date | Aug 18, 1987 |
| Priority date | — |
| Expiry date | Nov 5, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B21/182
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A movement sensor having a movable part, detection means for providing a first detection signal when the part is in one position and a second detection signal when the part is in a different position, and means for producing an alarm signal in response to the first and second detection signals being successively provided after initiation of the operation of the sensor irrespective of the order in which said signals are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.