Step switch
US4360720A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 23, 1981 |
| Grant date | Nov 23, 1982 |
| Priority date | — |
| Expiry date | Jan 23, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H19/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A step switch having contacts actuatable in predetermined indexed positions comprises a rotatable driving shaft and a coaxial driven shaft rotating an indexing mechanism into the indexed positions for actuating the contacts. A coupling is arranged between the shafts for indexing the rotary movement of the driven shaft in response to the rotation of the driving shaft. The coupling includes a driving coupling part keyed to the driving shaft, a driven coupling part keyed to the driven shaft, the coupling parts having peripheries coaxial with the shafts, a spring having two ends respectively engaging the coupling parts and being tensioned in the direction of the coupling part peripheries, and a shape-conforming blocking device controlled by the rotary position of the shafts in relation to each other for respectively blocking and unblocking the rotary movement of the driven coupling part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.