Switching element produced in the form of a film
US6429668B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2000 |
| Grant date | Aug 6, 2002 |
| Priority date | — |
| Expiry date | Aug 10, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2239/078
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching element of foil construction is presented, with a triggering layer of first resistive material applied to a first carrier-foil and a sensor layer of a second resistive material applied to a second carrier-foil. The two carrier-foils are arranged a certain distance from each other by means of spacers, in such a way that the triggering layer and the sensor layer are opposite each other and, when the switching element is not operated, are not in contact with each other, whereas, when the switching element is triggered, the triggering layer and the sensor layer are initially in contact with each other at a first point of their surface, and the area of contact increases as the pressure on the switching element is increased. The first and second resistive materials are tuned to each other in such a way that, when there is contact between the triggering layer and the sensor layer, the resistive of the boundary layer between the triggering layer and the sensor layer is essentially determined by the extent of the contact area. According to the invention, the sensor layer is designed so that, starting from the first point, its electrical resistivity varies with the distance from …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.