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:
Dec. 21, 1976
Filed:
Apr. 02, 1969
William A O'Berry, Severna Park, MD (US);
Carl D Wise, Severna Park, MD (US);
Milton R Lang, Jr, Baltimore, MD (US);
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Abstract
A circuit for detecting the occurrence of incoming pulses at a predetermined repetition rate while remaining unresponsive to pulses occurring at an even harmonic of such rate, the circuit including a clock pulse generator and resettable counter arranged to count the pulses produced by the generator and to produce an output representing its current count, resetting means for resetting the counter to its '0' count state when an incoming pulse arrives at a time after the arrival of a preceding pulse which started the clock pulse generator which is equal to or greater than the time between pulses occurring at the repetition frequency to be detected, signal producing means for producing an output signal only when the time of arrival between such incoming pulses is equal to the time between pulses at the repetition frequency to be detected, and output signal suppressing means arranged to prevent the production of an output signal when an incoming pulse arrives at a time after the arrival of an incoming pulse which started the clock pulse generator equal to one-half the time between incoming pulses occurring at the repetition frequency to be detected. The clock pulse generator has a preferably variable repetition frequency which is a multiple of the repetition frequency to be detected.