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:
Jul. 06, 1976
Filed:
Jul. 29, 1974
Shizuo Sumida, Hiroshima, JA;
Kazuo Nii, Hiroshima, JA;
Osamu Shimizu, Himeji, JA;
Atsushi Ueda, Himeji, JA;
Mitsuaki Ishii, Himeji, JA;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JA;
Toyo Kogyo Co., Ltd., BOTH OF, JA;
Abstract
A control apparatus for controlling a plurality of electrical devices comprising a plurality of electrical devices, a central operation device for generating a plurality of control signals for controlling the electrical devices, the plurality of control signals comprising a first signal for driving a first electrical device and a second signal delayed in time from the first signal to permit discontinuance of the driving of the first electrical device if a high current is detected passing therethrough, a terminal operation device for each electrical device, a signal transmission line for transmitting the plurality of control signals from the central operation device to the terminal operation devices, a first terminal operation device for driving the first electrical device comprising a signal division circuit for dividing from the plurality of control signals said first and second signals, a driving circuit connected to the signal division circuit for driving the first electrical device in response to said first signal, a state detecting circuit for detecting a high current in the first electrical device, a state signal generating circuit connected to the state detecting circuit, the signal division circuit and the driving circuit for deactivating the driving circuit to discontinue the driving of the first electrical device only upon receipt of a signal from the state detecting circuit indicating high current in the first electrical device and receipt at the same time of said second signal, said second signal being delayed in time from said first signal so that high transient starting current in the first electrical device has subsided by the time of said second signal so that driving of the first electrical device will be discontinued when high current is present therein with the exception of the presence of high transient starting current.