Trip interlock design
US4963846A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1989 |
| Grant date | Oct 16, 1990 |
| Priority date | — |
| Expiry date | Aug 4, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H71/126
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A trip interlock assembly trips a circuit breaker any time the circuit breaker is removed from its panel mounting. The trip assembly is adapted to be disposed about a load side terminal and cooperate with the circuit breaker tripping device. In one embodiment, the trip assembly includes a housing and a spring-loaded actuation arm, disposed generally perpendicular to the circuit panel surface. The actuation arm is formed with a cam surface which cooperates with a trip pin adapted to actuate said circuit breaker tripping device. The trip pin acts as a cam follower and rides along the cam surface formed in the actuation arm. When the actuation arm is in an inward position the trip pin is in a normal position. However, when the circuit breaker is removed from the panel, the actuation arm under the influence of a biasing spring moves outwardly. This causes the cam surface on the actuation arm to actuate the trip pin to trip the circuit breaker. In an alternative embodiment of the invention, the trip interlock assembly includes a bell crank with a reciprocally mounted plunger which actuates an armature in the tripping device directly, instead of by way of the trip pin, anytime the circui…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.