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:
Nov. 25, 1986
Filed:
May. 07, 1982
James R Hurley, Brookfield, WI (US);
Cooper Industries, Inc., Houston, TX (US);
Abstract
The method of the present invention encompasses comparing the instantaneous value of a waveform with at least two reference voltages, -R and +R, when crossing of these voltages occurs and processing this data in a data processor (46) to determine parameters of the waveform such as frequency and amplitude and of fundamental and DC offset. The apparatus of the present invention includes comparators (E.sub.1 and E.sub.2) which senses the voltage crossings and which has outputs (28 and 30) inputted to a latch (36) and to logic circuitry (32). A counter (50) supplies a count to the latch (36) and the output of the latch (36) is coupled to a microprocessor (46). The logic circuitry (32) has an output (34) coupled to the latch and to the microprocessor (46) first for causing, when a crossing occurs, the latch (36) to latch data identifying the particular crossing made and a count of the time it occurred and second to cause the microprocessor (46) to input this latched data and then to reset the logic circuitry.