Electrical circuit breaker device
US6480079B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2002 |
| Grant date | Nov 12, 2002 |
| Priority date | — |
| Expiry date | Apr 25, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H71/58
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric circuit breaker (10) has a toggle mechanism (18) having two movable over center joints (3, 4) connected between a push-button (16) and a movable contact mechanism (30). When the push-button is depressed a first link rotates bringing the first movable over center joint (3) across a center position represented by a first imaginary straight line (1) to a stop surface (28). A spring member (36) provides a bias which acts on the second movable over center joint (4) normally maintaining the second movable joint against the stop surface so that with the two movable over center joints biased against the stop surface the movable contact mechanism is moved to a closed contact position when the push-button is depressed. An overload responsive member transfers motion to the second movable over center joint (4) upon the occurrence of a selected overload and moves the second over center joint across a center position represented by a second imaginary straight line (2) allowing the contacts opening spring (34) to move the movable contact mechanism to the open contacts position providing a trip free operation. The circuit breaker can be formed for a single phase or it can be formed for…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.