Patent · US Expired

Electrical apparatus used with a potentiometer and/or variable resistance element

US4910491A · kind A · utility

4Cited by

5References

19Claims

0Family size

Assignee

WABCO Westinghouse Steuerungstechnik GmbH & Co. · DE

Inventors

Helmut Gottling · Altwarmbüchen, DE
Ralf Kook · Hannover, DE
Rudolf Moller · Gehrden, DE
Peter Muller · Munich, DE
Gerhard Scharnowski · Gehrden, DE

Key dates

Filing date	Nov 6, 1987
Grant date	Mar 20, 1990
Priority date	—
Expiry date	Nov 6, 2007

Classification

Technology area (CPC H)Electricity
CPC primaryH01C10/38
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electrical apparatus is provided for use with a potentiometer or variable resistance element which does not require a mechanical connection between a contact member and an activating mechanism. This is accomplished by using a magnet in at least a portion of either the contact member or the activating mechanism while constructing at least a portion of the other of such contact member and the activating mechanism of a ferromagnetic material.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.