Rotatable trip test assembly for molded case circuit breakers
US4982173A · kind A · utility
11Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1990 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | Mar 1, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H71/128
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotatable trip test assembly unit for molded case circuit breakers consists of a unitary plastic part that cooperates with the internal structure of the circuit breaker cover to provide return spring bias to the trip test button. The trip test assembly unit rotates about a pivot and strikes the circuit breaker trip bar to thereby articulate the circuit breaker operating mechanism and separate the circuit breaker contacts. The interaction between a cam-follower on the assembly unit and a cam-shaped piece within the circuit breaker cover automatically returns the trip test button to its initial position upon release.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.