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. 13, 1976
Filed:
Jan. 30, 1974
Jiri B Bucek, State College, PA (US);
James R Shultz, York, PA (US);
Fincor, Inc., York, PA (US);
Abstract
A solid state trigger circuit provides variable period output signals within a timed sequence of signals for controlling conduction angle firing of thyratron type switching devices in an A.C. phase line. A bi-stable multivibrator receives timing signals derived from the alternating current in the phase line which are out of phase with each other. The timing signals oscillate the multivibrator at a desired timing rate to produce an output of the multivibrator which has voltage transition spikes at the beginning of each positive circle of the timing signals. A saw tooth wave form with a linear voltage input control signal indicative of a desired time period pulse width provides a square wave trigger output signal with signal pulse periods equal to the desired pulse width.