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. 09, 2004
Filed:
Nov. 12, 2002
Johan Kihlberg, Bengtsfors, SE;
Lars-Olof Ottosson, Tösse, SE;
Sem AB, Amal, SE;
Abstract
A circuit to achieve a large ignition advance, limitation of speed of revolutions and to prevent backfiring and reverse direction running in a magnetic ignition system that comprises a flywheel with two poles and a two-legged iron core. An ignition transformer (L /L ), a charging coil (L ) and a triggering coil (L ) that may be connected in antiphase to the charging coil are arranged on the first leg in the direction of rotation of the flywheel. A time-constant circuit (an RC net) and a control switch (T ) are arranged between the charging coil and a main switch (T ) that open/block triggering pulses such that charging takes place one revolution later than triggering. Limitation of the speed of revolutions is achieved with a time constant that can be determined.