Rotary control switch with plural movable concave light reflectors
US5177355A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 1991 |
| Grant date | Jan 5, 1993 |
| Priority date | — |
| Expiry date | Apr 10, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H19/11
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switch (10) comprises a rotary part (12, 14, 16 and 18) and a bracket (24) for supporting the rotary part. The rotary part comprises a knob (12), a shaft (14), attached to, or formed on, the knob, a detent cam (16) attached to, or formed on, the shaft, and a light director (18), attached to the shaft, for directing light from an external light source to a light receiver when the switch is in a first position and for directing light from the light source away from the light receiver when the switch is in a second position. The bracket comprises a detent spring (17) for making contact with the detent cam to provide operating positions for the switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.