Patent · US Expired

Layer resistor element

US4243969A · kind A · utility

24Cited by

9References

11Claims

0Family size

Assignee

Preh, Elektrofeinmechanische Werke Jakob Preh, Nachf. GmbH & Co. · DE

Inventors

Wolf-Erhard Steigerwald · Bad Neustadt an der Saale, DE
Heinz-Jurgen Siede · Bad Neustadt an der Saale, DE
Bela Rosner · Lüdenscheid, DE
Jurgen Zimmermann · Salzgitter, DE

Key dates

Filing date	Apr 17, 1979
Grant date	Jan 6, 1981
Priority date	—
Expiry date	Apr 17, 1999

Classification

Technology area (CPC H)Electricity
CPC primaryH01C10/04
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A layer resistor element for use in a variable resistor has two resistance layers disposed upon each other on an insulating substrate, the lower resistance layer being provided with two comb-like sets of separating slots extending from opposite sides to form a meander-like resistance path, the widths and lengths of the meander turns varying in accordance with a given non-linear resistance characteristic. The upper resistance layer which is of a material of higher resistivity than the lower resistance layer covers the lower layer partly or totally and extends beyond the lower layer at one side thereof where it provides a path for a slider of the variable resistor.

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