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. 09, 1987
Filed:
Oct. 02, 1986
Applicant:
Inventors:
Ronald D Ingraham, Quincy, MI (US);
Darrel A Dolph, Big Rapids, MI (US);
Assignee:
Nartron Corporation, Reed City, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318283 ; 318266 ; 318286 ; 318468 ; 307 / ;
Abstract
An antenna motor drive system for raising and lowering an antenna. Response to a user input for raising or lowering a vehicle antenna is delayed to avoid rapid reversals of the antenna drive motor. This avoids the large surge currents associated with the prior art. The circuit monitors drive circuit response and de-energizes the motor if an inappropriate response is sensed after a certain period. Use of switching transistors rather than a relay facilitates implementation of the invention in integrated circuit form.