Switch and means to prevent unauthorized operation thereof
US4359615A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1981 |
| Grant date | Nov 16, 1982 |
| Priority date | — |
| Expiry date | Aug 14, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H27/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switch actuator in the form of a bifurcated elongated member has a pair of legs pivoted relative to each other. In the "off" position of the switch, the legs may be pivoted relative to each other, and the actuator may be withdrawn from the switch. This precludes an unauthorized operation of the switch and the equipment controlled thereby. In the "on" position of the switch, an interlocking means precludes the relative pivotal movement of the legs, and the actuator may not be withdrawn from the switch. In the preferred embodiment, the legs of the actuator automatically engage an operating element of the switch, upon the insertion of the actuator into the switch. Thereafter, the actuator has a limited sliding movement to alternately move the switch into its "on" and "off" positions. Preferably, the switch is of the "pull on/push off" type; and the sliding movement of the actuator is in a plane which is substantially parallel to the linear movement of the switch operating element. Additionally, the actuator is provided with an enlarged outer portion to facilitate manipulation by the operator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.