Telescopic isolating switch
US4568808A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1984 |
| Grant date | Feb 4, 1986 |
| Priority date | — |
| Expiry date | Dec 19, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H31/34
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This telescopic isolating switch is made from nestable tubular members (10, 11', 12') including a base member (10) connected to an electrical connection point, intermediate members (11', 12'), and an end member supporting an electrical contact. Each intermediate member (11', 12') contains two pulley wheels (110, 111) fixed close to respective ends thereof, together with an endless loop (114) passing over the two pulley wheels (110, 111) inside the member and attached at two diametrically opposite points (116, 117) to the ends of the two adjacent members (10, 12'). The lower pulley wheel (110) of the intermediate member (11') which is adjacent to the base member (10) being driven through the base member (10) by means of a gear system slidingly engaged on a rotary fluted shaft (104) which is fixed inside the base member (10) and which is driven by a drive motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.