Muliple-function selector utilizing a force sensitive variable impedance device

An electrical switch assembly (10) includes a member (18) by which a user selects one of a plurality of functions. Operation of the member (18) applies different amounts of pressure to a transducer (20) that has an impedance which changes in response to the applied pressure. An input circuit (31) pr...

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Bibliographic Details
Main Authors RHINEHART, MATTHEW GENE, FAVRE, PATRICK, KHOURY, JOSEPH ELIAS, SHMULEVICH, IGOR ARONVICH, HUBBELL, RUTH ELLEN, JAYASINHA, NARAYANARAO
Format Patent
LanguageEnglish
French
German
Published 31.03.1999
Edition6
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC SWITCHES
ELECTRICITY
EMERGENCY PROTECTIVE DEVICES
RELAYS
RESISTORS
SELECTORS
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Summary:An electrical switch assembly (10) includes a member (18) by which a user selects one of a plurality of functions. Operation of the member (18) applies different amounts of pressure to a transducer (20) that has an impedance which changes in response to the applied pressure. An input circuit (31) produces an output voltage which varies in relation to changes in the impedance of the pressure transducer (20). A voltage comparator (38,62,74) compares the output voltage to a plurality of voltage ranges and in response to the voltage comparison. An output driver (39,72,80) produces at least one electrical signal that indicates which one of plurality of functions the user has selected.
Bibliography:Application Number: EP19980116380