The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 08, 1985
Filed:
Sep. 21, 1981
Benjamin A Johnson, Rochester, NY (US);
Other;
Abstract
The invention uses an RC circuit 12 to convert an analog quantity to be measured into a time interval proportional to the measured quantity by using a resistive element in the RC circuit responsive to the quantity being measured. The RC circuit starts and stops a time base generator 13 to produce pulses having a total number proportional to the time interval, and a gate system 14 applies the pulses to the key terminals of the circuitry 16 of a pocket calculator 10 for indicating the pulse count on a display 15, either directly or after being processed by functions available in the calculator circuitry. The RC circuit can also be used to start and stop a time base generator 33 built into a digital stopwatch for displaying a pulse count proportional to the quantity measured. The measured quantity can be a capacitance value, a resistance value, or energy impinging on a responsive transducer in the RC circuit.