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:
Oct. 11, 1977
Filed:
Nov. 24, 1975
Applicant:
Inventors:
Shunsaku Nakauchi, Mitaka, JA;
Akifusa Takahashi, Tokyo, JA;
Assignee:
Kokusai Gijutsu Kaihatsu Kabushiki Kaisha, Tokyo, JA;
Primary Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
361171 ; 292144 ;
Abstract
An electric lock system is disclosed comprising an electro-mechanical lock device including a pair of current terminals and a self-sustaining solenoid circuit, a control device including a pair of current terminals, at least one d.c. current source and means for changing the direction of the d.c. current. The electro-mechanical lock device is put in a locking condition and an unlocking condition according to the application of the d.c. current supplied thereto from the control device through the lead wires and these conditions are detected in the control device via the same lead wires.