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:
Apr. 23, 1985
Filed:
Apr. 26, 1983
Hiromi Watanabe, Kanagawa, JP;
Oppama Kogyo Kabushiki Kaisha, Kanagawa, JP;
Abstract
An ignition time controlling device having a trigger circuit employing a programmable unijunction transistor which will be ON at a timing when a primary short-circuiting current of an ignition coil is at or a little past a peak. The device includes a charging and discharging circuit for the primary short-circuiting current; a switching controlling circuit interrupting the primary short-circuiting current when the trigger circuit is ON; an ignition coil inducing a high voltage in a secondary coil when the primary short-circuiting current is interrupted; a spark plug generating a spark on receiving the high voltage of the secondary winding and an angle advancing circuit connected between the programmable unijunction transistor and the switching controlling circuit. The angle advancing circuit breaks over at a set value of the primary short-circuiting current or the voltage on the primary winding of the ignition coil and operates the switching controlling circuit prior to the operation of the programmable unijunction transistor.