Bolted pressure switch with side operator mechanism and door assembly interlock
US4137433A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1977 |
| Grant date | Jan 30, 1979 |
| Priority date | — |
| Expiry date | Jun 10, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H9/223
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An operating mechanism for opening and closing the movable contacts of a load break pressure contact switch which is operable from a side of a switch enclosure and has an optional door safety interlock. The operating mechanism comprises a main shaft with a handle attached thereto for rotating the shaft in opposite directions between switch-open and switch-closed positions. An operating lever which is connected to the movable switch contacts is driven by an overcenter toggle spring means which is operated by the main shaft through a lost motion connection mechanism. An optional interlock is provided for the switch enclosure access door and includes a latch to hold the access door closed when the switch contacts are in their closed position and a mechanism to prevent movement of the switch contacts to their closed position when the access door is open. The interlock is operatively actuatable through cam surfaces and stop surfaces on the lost motion connection mechanism. An override for the door latch allows the access door to be opened while the switch contacts remain closed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.