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. 26, 1980
Filed:
Jul. 18, 1978
Jiro Harada, Tokyo, JP;
Harada Industry Co., Ltd., Tokyo, JP;
Abstract
A car antenna system comprises an expansion-type antenna element, a driving wire with one end connected to the driving end of the antenna element, a wire transfer mechanism to expand and contract the antenna element by transferring the driving wire in the longitudinal direction thereof, a motor for driving the wire transfer mechanism, a driving power supply circuit including a first power supply circuit for rotating the motor in one direction and a second power supply circuit for rotating the motor in the opposite direction, and first and second circuit breakers connected, respectively, to the first and second power supply circuits for breaking overcurrent flow in each corresponding power supply circuit when the antenna element reaches the expansion or contraction limit.