Variable electrical resistance device
US4400686A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 21, 1981 |
| Grant date | Aug 23, 1983 |
| Priority date | — |
| Expiry date | Jul 21, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C1/01
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotary variable electrical resistance device comprises a housing; a spindle, arranged for rotation in the housing to adjust the setting of the device, and arranged to be rigidly secured to the end of a rotatably supported shaft serving as an extension of the spindle or whose angular rotation is to be monitored by the device and such that the shaft effectively supports the resistance device. The housing is restrained from rotation by a member such as a pin on a disc secured to a support by a ring shaped member and engaging an opening or recess in a flange secured to the housing. Clearance between the members allows the device to be displaced to follow displacement of the shaft resulting from play in bearings supporting the shaft or misalignment or bending of the shaft and obviates the necessity for the expensive and bulky flexible couplings of the prior art.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.