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. 21, 1981
Filed:
Dec. 05, 1977
Akihiko Inoue, Soma, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
Disclosed is a locking device for locking a door and the like, suitable for use in an electric locking system. The device has a dead bolt which is held in a retracted position within a housing when the door is open, and an actuating member adapted to be partially projected out of the housing when the door is open. The actuating member is slidably mounted in the housing and has an inclined surface acting as a cam surface for engagement with the end surface of the door. The actuating member is so inter-related with the dead bolt that the latter is driven into a corresponding hole in the door jam as the slidable member is depressed by the door, in the course of closing of the door. An electromagnetic plunger is provided for allowing the retraction of the dead bolt in accordance with a predetermined specific electric signal. A manually operative member is associated with the electromagnetic plunger to allow a manual unlocking if necessary.