Variable electrical resistance device
US4623868A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 8, 1985 |
| Grant date | Nov 18, 1986 |
| Priority date | — |
| Expiry date | Jan 8, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60G2600/26
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A variable electrical resistance device for monitoring displacement of a mechanical component such as a vehicle road wheel suspension system having a housing; an electrically resistive track and conductive slip ring on a support in the housing; electrically conductive wipers on a rotatable carrier provided with a spindle for coupling to the component. The wipers traverse the resistive track and the slip ring respectively. The support is mounted on springs or flat strips of resilient metal, so as to be displaceable away from and towards the wipers. A solenoid, of double-acting type or acting in association with the bias of the springs, has an armature operating to effect displacement of the support away from and towards the wiper whereby contact between the wiper and track may be broken, or the contact pressure therebetween reduced, when monitoring is not required, thereby prolonging the life of the wiper and track assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.