Acceleration sensor
US5248861A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 1990 |
| Grant date | Sep 28, 1993 |
| Priority date | — |
| Expiry date | Aug 9, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H36/002
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An acceleration sensor is disclosed, which comprises a movable permanent magnet, a case of a non-magnetic material having a space with the movable permanent magnet movable therein, a magnetic yoke provided on the case and extending in a direction crossing the directions of movement of the movable permanent magnet, and a lead switch for forming a closed magnetic circuit together with the movable permanent magnet and magnetic yoke, the lead switch being turned on and off with a movement of the movable permanent magnet caused due to an acceleration produced by shocks or vibrations. Another acceleration sensor is disclosed, which is operable in response to a predetermined acceleration to open a first magnetic circuit with a permanent magnet and close a second magnetic circuit with the permanent magnet so as to close a lead switch and comprises a movable magnetic member held stationary in the first magnetic circuit and moved in response to a predetermined acceleration in a direction crossing and to close the first magnetic circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.