Shock sensor
US5581060A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1994 |
| Grant date | Dec 3, 1996 |
| Priority date | — |
| Expiry date | Jun 7, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H35/147
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A shock sensor capable of detecting a shock in a number of directions includes a reed switch, which is fixed inside a body and has a reed contact part with is magnetically changed from a first to a second state by way of a magnet, which is fixed inside the body at a specified distance from the reed switch. A shield member, having a sufficiently large area, prevents the magnetic force of the magnet from affecting the reed contact part when the shield member is in its regular position. A resilient member, in a normal state, keeps the shield member at its regular position between the reed contact part and the magnet, at which the reed contact part is kept in the first state. When a shock is applied to the shock sensor, the resilient member allows the shield member to move to a position where the reed contact part changes over to the second state. In a second embodiment, the magnet is movably held in the main casing at a specified distance from the reed switch. In a normal state, the position of the magnet is such that its magnetism does not affect the reed contact part. When a shock is applied to the shock sensor, the magnet moves to a second position where the reed contact part is ch…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.