Spiral operating mechanism for high voltage switch
US3980977A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 1, 1975 |
| Grant date | Sep 14, 1976 |
| Priority date | — |
| Expiry date | Apr 1, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H3/227
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A spiral spring interconnects a pivotably mounted drive lever that may be pivoted either by hand or by a motor, and a pivotably mounted toggle lever that is operably connected to a switch. The toggle lever is held in the switch-closed or the switch-opened positions by main latches which hold the toggle lever in position while the drive lever is pivoted to bias the spring. Once the spring is biased, stop latches engage the drive lever holding it in a spring biased position. The main latches may then be either manually operated or operated by solenoids connected to control circuitry to release the toggle lever so that the spring will react against the toggle lever to either open or close the switch depending on the position of the switch at the initiation of operation. Once the switch has either opened or closed, the spring may be either recharged automatically by the motor, or if manual operation is desired, the motor can be disabled so that the spring can be biased by manual rotation of the drive lever. A clutch mechanism is provided to disconnect the motor from the mechanism when a manual tool is inserted into the mechanism. Also provided is a shutter bolt that locks out automatic…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.