Safety switch assembly
US5464954A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 1994 |
| Grant date | Nov 7, 1995 |
| Priority date | — |
| Expiry date | Jul 19, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2027/005
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The safety switch unit controls the source of power for machinery in accordance with the opening and closing of a room door. The safety switch includes an actuator (2) secured to a door, a cam shaft extending transversely of a direction in which the actuator (2) advances into the switch unit (1), the actuator (2) having a stepped top end in correspondence to which cam plates (13), (14a) and (14b) are provided within the switch unit (1) each capable of independently rotating, these cam plates having start sides (17) and (22) and a single cam follower pin (29) passed therethrough, thus protecting the switch unit (1) against mischievous or malicious operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.