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. 20, 1987
Filed:
May. 22, 1985
David J Wagner, Lake Zurich, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
An electronic turn signal cancellation apparatus is disclosed which includes two separate rotational positions sensing elements, each sensing an associated identifying portion positioned on a shaft rotated in accordance with vehicle steering wheel rotation. An electronic turn signal cancellation circuit, which may be effectively implemented by a microprocessor, effectively analyzes the output signals of these sensors and determines the current angular shaft position and also the previous shaft position. Turn signal cancellation is implemented by determining current shaft position and the direction of rotation of the shaft. One embodiment implements turn signal cancellation without hysteresis, while a second embodiment utilizes similar structure to implement turn signal cancellation with hysteresis. In each case only two sensors are utilized which may be joined together to form a unitary sensor assembly.