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:
Jun. 05, 1979
Filed:
Dec. 23, 1977
Michael W Paul, Mississauga, CA;
Barringer Research Limited, Rexdale, CA;
Abstract
A pulse generator for energizing a coil with periodic bipolar current pulses of predetermined aplitude, period and repetition rate and of generally square wave form. The coil to be energized is connected in parallel with a capacitor to form a closed under damped tuned circuit of predetermined frequency. Current flowing through the coil is suddenly interrupted, causing a sinusoidal voltage to be generated across the tuned circuit. The current flowing through the coil rapidly changes according to a cosine function. At a time when the current has reached its maximum positive or negative value or slightly before, controlled rectifiers in the circuit between the power source and the tuned circuit are caused to conduct thus maintaining the current in the coil at a level substantially equal to the maximum value. At the end of a predetermined interval, the supply of direct current to the tuned circuit again abruptly is interrupted, thus defining another edge of a pulse. The operation is repeated cyclically, and in this manner pulses of generally square wave form are generated periodically.