Boots – shoes – and leggings
Patent
1987-07-07
1989-09-05
Lall, Parshotam S.
Boots, shoes, and leggings
324 62, G01R 2700
Patent
active
048645133
ABSTRACT:
The present invention is a technique for forming a signal representing the operator adjustment of a potentiometer. This technique consists of measuring the reference time constant of the resistance between the fixed terminals of the potentiometer and a capacitor, measuring the variable time constant of the resistance of potentiometer between a fixed terminal and the terminal variable by an operator setting and this same capacitor, and again measuring the reference time constant of the resistance between the fixed terminals of the potentiometer and the capacitor. These time constant measurements are made by discharging the capacitor, charging the capacitor through the appropriate terminal of the potentiometer and measuring the time required for the voltage across the capacitor to reach a predetermined threshold level. This measurement sequence is repeated if the two measures of the reference time constant differ by more than a predetermined amount. The digital ratio of the variable time constant and the reference time constant is then calculated. This digital ratio is the representation of the operator adjustment of said potentiometer.
REFERENCES:
patent: 4362988 (1982-12-01), Weimer
patent: 4492916 (1985-01-01), Johnson
Levine Michael R.
Rigotti Victor
Russo James
Skogler Nicholas
Cosimano Edward R.
Honeywell Incorporated
Lall Parshotam S.
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