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:
Sep. 22, 1987
Filed:
Oct. 01, 1986
Wataru Ichikawa, Fuchu, JP;
Yuji Matsuki, Sayama, JP;
Yoshiaki Hirata, Kodaira, JP;
Mikiya Ito, Kodaira, JP;
Kabushiki Kaisha SG, Tokyo, JP;
Bridgestone Corporation, Tokyo, JP;
Abstract
A coil section for being excited by a primary ac signal and producing a secondary output signal is provided on the open end side of a bag-cylinder main body. A material consisting of such substance and having such configuration that bring about reluctance change of a magnetic circuit passing through the coil section in accordance with displacement of a piston rod of the bag-cylinder is provided in a predetermined pattern about the piston rod. In a detection circuit, position detection data representing the position of the piston rod is obtained in response to the secondary output signal from the coil section. In a position establishing circuit, stop position data representing a desired position at which the piston rod should be stopped is established depending upon the diameter of a tire to be vulcanized. In a comparison and control circuit, stopping of the piston rod is controlled, in a specified step in a sequence for vulcanizing the tire, in accordance with comparison between the established stop position data and the position detection data. This control device can readily cope with tires of different diameters simply by changing the stop position data.