Hand operated instruments having non-magnetic safety switch
US4105885A · kind A · utility
27Cited by
20References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 22, 1976 |
| Grant date | Aug 8, 1978 |
| Priority date | — |
| Expiry date | Jun 22, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S200/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Operator controlled devices in the form of hand operated instruments in which a ring worn by an operator is configured to be insertable into a recess in a hand holdable portion of the instrument. The recess includes a fixed contact configuration that is engagable by a non-magnetic bridging contactor on an outer peripheral face of the ring, so that the instrument becomes operational when the contactor is inserted into the recess and engages the fixed contact configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.