Ignition switch
US5252791A · kind A · utility
17Cited by
14References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 2, 1991 |
| Grant date | Oct 12, 1993 |
| Priority date | — |
| Expiry date | Oct 2, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H19/11
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A key switch comprises a disc-shaped switch contact suspended above a number of stationary terminals. The switch contact includes one or more cut-outs which isolate individual terminals in different angular orientations of the contact. The signals conducted through each terminal vary as different combinations are bridged by the contact in different angular orientations. By changing the pattern of the cut-outs through the contact, the signals conducted through the switch are changed. The switch is efficient to produce because it can be adapted to different circuits without substituting physically different terminal pieces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.