Pressure responsive switch device
US4273976A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1979 |
| Grant date | Jun 16, 1981 |
| Priority date | — |
| Expiry date | Jun 6, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H35/2657
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switch device (10, 10') which is responsive to various pressures is disclosed. The device (10, 10') includes a housing (18, 18') and plurality of switches (102, 104, 106, 168, 170, 172). A flexible diaphragm (40, 40') is supported external of the housing (18, 18') and has a first face adapted to face a pressure source and a second face facing an external wall (56, 56') of the housing (18, 18'). A plurality of first magnets (46, 48, 50, 182, 184, 186) are connected to the diaphragm at different locations thereon. A plurality of second magnets (108, 110, 112, 174, 176, 178) are supported in the housing and are each connected to one of the switches for activating a respective switch. Each of the second magnets is disposed adjacent one of the first magnets to form a plurality of pairs of first and second magnets whereby the motion of one of the first magnets of one of said pairs causes the second magnet of said last-mentioned pair to move and activate one of the switches to which it is connected. A plurality of biasing springs (74, 76, 150, 152, 164) bias the diaphragm away from the end wall of the housing. Each of the springs provides a biasing force at a different location on the d…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.