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. 31, 1979
Filed:
Jun. 28, 1977
Makoto Iida, Tokyo, JP;
Security Patrols Co., Ltd., Tokyo, JP;
Abstract
Herein disclosed is a safety lock system which includes an electric lock mounted on a gateway to a certain region, a card reader, a display device and a main controller. The main controller is arranged so that it can check the card data read by the card reader. Accordingly, when the card data are in agreement with the predetermined data, the main controller feeds a locking or unlocking drive signal to the electric lock. On the contrary, when the card data are not in agreement with the predetermined data, the main controller emits a first alarm signal to the display device. Furthermore, when the main controller receives a normal operation signal from the electric lock, the main controller emits a signal of confirmation of the normal operation of the electric lock to the display device; whereas when the main controller does not receive the normal operation signal, it emits a second alarm signal to the display device.