Circuit breaker bell alarm accessory
US5936535A · kind A · utility
8Cited by
3References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 29, 1998 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | May 29, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H71/465
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An air circuit breaker bell alarm accessory interacts with the circuit breaker operating mechanism to provide local target indication as well as remote signal indication of the separation of the circuit breaker contacts. An indicator switch provides remote signal indication while a lock-out switch interacts with the accessory target to prevent re-closure of the circuit breaker contacts. One of the switches is selected having "normally open" contacts while the other switch is selected having "normally closed" contacts to reduce the amount of mechanical force required to simultaneously operate the indicator and lock-out switches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.