Electrical switch
US4524251A · kind A · utility
19Cited by
1References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 18, 1983 |
| Grant date | Jun 18, 1985 |
| Priority date | — |
| Expiry date | Nov 18, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2027/005
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrical switch for use as a safety switch for doors of lifts or elevators, the contact push rod of which is actuated by a switching roller when the roller is turned by means of an inserted actuating member. The switching roller comprises two axially spreadable switching roller portions that can be spread against the force of a spring by a pin specially provided for that purpose on the actuating member; if there is no pin on the actuating member, the roller strikes a stop before the switch is closed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.