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:
Feb. 24, 1976
Filed:
Jan. 16, 1975
Thomas A Kalogerson, Bloomington, MN (US);
Joseph E Dandois, Montoursville, PA (US);
Optimizer Control Corporation, Minneapolis, MN (US);
Abstract
An ignition retarding device which cuts off the usual vacuum ignition advance to retard the ignition when the brakes are actuated or when the engine speed drops below a predetermined value, there being a further device responsive to engine temperature to restore the vacuum ignition advance whenever the temperature of the engine rises above a predetermined value. The speed is measured by an electronic tachometer whose input is connected across the distributor points and whose output is fed through a voltage comparator and an amplifier to control the energization of an electrically operated valve. The override brake and temperature signals are obtained by connections to the usual brake switch and temperature switch. Provision is made for use of the equipment with automotive vehicles either in which the brake switch is between the brake light and ground or between the battery and the brake light.