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:
Nov. 06, 1984
Filed:
Dec. 02, 1983
Akihiro Yoshida, Gifu, JP;
Kabushiki Kaisha Yamada Dobby, Bisai, JP;
Abstract
Disclosed herein is means for correcting the position of bottom dead center of a slide in a press having a frame, a crankshaft rotatably mounted on the frame, and a slide connected to the crankshaft and movable in a vertical plane, wherein the correlation between the rotational speed of the crankshaft and the bottom dead center position of the slide is determined in one-to-one correspondence. The means comprises a variable speed motor for rotating the crankshaft; a sensor for sensing the position of bottom dead center of the slide; and a control circuit for comparing the signal generated from the sensor which is representative of the bottom dead center position with a signal representative of a preset reference position of bottom dead center of the slide and controlling the speed of the motor to suit the speed representative of the reference position of bottom dead center of the slide.