Blade lock for electric switch
US4078162A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 22, 1976 |
| Grant date | Mar 7, 1978 |
| Priority date | — |
| Expiry date | Mar 22, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2031/286
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention provides an improved positive latch for high voltage, air break disconnect switches of the type having an elongated blade with one end swiveling on a terminal to switch its opposite end from the remote terminal, the blade being rotatable about its longitudinal axis and relative to the terminals and provided at its switching end with a transversely projecting contact lug shiftable by rotation of the blade into and out of frictional engagement with the remote terminal. The latch is pivotally mounted on the remote terminal and has a hook-like portion spring biased downwardly into latching position with respect to the end portion of the blade and is rotatable out of latching position by engagement with the latch of an arm carried by the blade when the contact lug is rotated out of engagement with the remote terminal and is formed with an extension engageable with the blade mounted latch operating arm for opening the latch as the blade approaches closed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.