Actuator for a step-transformer load switch
US5266759A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1992 |
| Grant date | Nov 30, 1993 |
| Priority date | — |
| Expiry date | Aug 5, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H9/0027
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An actuator used with a load switch having a rotary drive shaft extending along a drive axis and carrying a cam and with an interrupter having an operating rod displaceable longitudinally of itself and generally perpendicular to the drive axis has a frame defining upper and lower pivots having respective upper and lower axes spaced from each other and generally parallel to the drive axis. An output parallelogrammatic linkage has an output link having upper and lower ends, movable between an upper and a lower position, and formed with an aperture alignable axially with the input-link aperture and an output coupling formation connected longitudinally on the rod so that on movement between the upper and lower positions the interrupter is operated. An input parallelogrammatic linkage has an input link formed with an aperture and an input coupling formation bearing radially on the cam so that rotation of the cam vertically displaces the input link between its upper and lower positions. A spring braced vertically in the windows in a position with the windows aligned axially bears upward on all the upper links and downward on all the lower links. Respective upper and lower stops on the fr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.