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:
Apr. 03, 1990
Filed:
Jun. 28, 1989
Masayoshi Onishi, Himeji, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An electric circuit with limit-switch for limiting rotatable range of an output shaft of an electric drive unit disposed between an electric motor and a control device for supplying a drive current thereto, comprising a first snap action limit switch disposed on a first input terminal of the motor, and a second snap action limit switch disposed on a second input terminal of the motor, the limit switches having pivot points of movable contacts on a motor side, their normally-closed contacts being connected to an output side of the control device and their normally-open contacts being connected to a common connecting point, and the normally-closed contacts of the first limit switch is connected to the common connecting point through a diode in the direction allowing an electric current to flow from each of the normally-closed contacts toward the common connecting point, and further comprising a diode for allowing an electric current to flow in parallel to the second limit switch, bypassing between the normally-closed contact and the movable contact and flowing toward the motor.