EP 0118247 A1 19840912 - Potentiometer.
Title (en)
Potentiometer.
Title (de)
Potentiometer.
Title (fr)
Potentiomètre.
Publication
Application
Priority
GB 8304934 A 19830222
Abstract (en)
A potentiometer comprises a resistive first track (1) with first and second terminals (2, 3) to which a voltage is applied. A conductive wiper (5) traverses the first track and is connected to a third terminal (7) to provide an analogue output signal dependent on the position of the wiper. A conductive second track (8) has discrete insulating regions (9) along its length and is provided with a fourth terminal (10). The wiper (5) also traverses this second track (8). It is arranged that sharply defined transitions in electrical output (logic transitions) occur at the fourth terminal (10) as the wiper (5) traverses boundaries between the insulating regions (9) and the second track (8). The analogue output from the third terminal (7) at positions of the wiper (5) where the output transitions at the fourth terminal (10) occur, provide calibration points to permit accurate relating of the wiper position to the output from the third terminal (7) at any location between the calibration points. Particularly applicable to position sensing, e.g. in engine management systems.
IPC 1-7
IPC 8 full level
H01C 10/50 (2006.01)
CPC (source: EP)
H01C 10/50 (2013.01)
Citation (search report)
- [A] US 3679848 A 19720725 - GERWITZ PAUL F
- [A] FR 2051375 A5 19710402 - MATSUSHITA ELECTRIC IND CO LTD
- [A] DE 2265331 A1 19770728 - BOSCH GMBH ROBERT [DE]
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
EP 0118247 A1 19840912; EP 0118247 B1 19870930; DE 3466613 D1 19871105; GB 2135526 A 19840830; GB 2135526 B 19860521; GB 8304934 D0 19830323
DOCDB simple family (application)
EP 84301032 A 19840217; DE 3466613 T 19840217; GB 8304934 A 19830222