Dual direction switch
US5034648A · kind A · utility
29Cited by
9References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 31, 1989 |
| Grant date | Jul 23, 1991 |
| Priority date | — |
| Expiry date | Oct 31, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S310/80
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A piezo film switch comprises a cantilever with a pair of layers, including a piezo film layer and a flexible, backing layer laminated thereto. The piezo film layer produces a positive or negative output pulse, depending upon a direction of deflection of the cantilever. Interface circuitry coupled to the piezo film layer is powered by the output pulses and provides "pseudo contact closures" which emulate the operation of a mechanical switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.