Multiple pressure switch
US4346276A · kind A · utility
Inventor
Key dates
| Filing date | Dec 10, 1980 |
| Grant date | Aug 24, 1982 |
| Priority date | — |
| Expiry date | Dec 10, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H35/2657
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A multiple pressure switch comprising a first and a second snap switch, which under spring pre-stress each assume a starting position and have a first and second point of application respectively for an actuating member, which is supported on a total of three application points lying on the corners of a conceived triangle, and with gradual increase of an external force acting on the actuating member within the triangle causes first the first and then the second snap switch to snap over into a final position. Relative to a base plane normal to the direction of application of the external force the first point of application in its starting position lies higher and in its end position lies deeper then the second point of application in its original position, and the second point of application in its starting position lies higher and in its end position lies lower than the third point of application.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.