Actuator-controlled keylock switch
US4904829A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1988 |
| Grant date | Feb 27, 1990 |
| Priority date | — |
| Expiry date | Mar 25, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H3/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A key attached, for example, to the door of an electrical equipment cubicle is capable of sliding within a passageway so as to cause pivotal displacement of a cam and upward displacement of a push-rod, thus releasing a switch lug. A locking rod forming part of a slide-block which is coupled with the push-rod is capable of moving between a locking position in which an annular channel permits displacement of the key and an unlocking position in which the locking rod is engaged within a key notch. One end of the slide-block projects from the top face of the switching unit head in order to be downwardly displaced by an actuator, whereupon the key can be withdrawn without difficulty or danger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.