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:
Nov. 27, 1990
Filed:
Apr. 10, 1990
Antonius P Aulbers, Delft, NL;
Johannes M Ewalds, Delft, NL;
Paul I d'Hond, Zwijndrecht, NL;
Johan C Hordijk, Oosterhout, NL;
Chubb Lips Nederland bv, Dordrecht, NL;
Abstract
An 'electronic' lock has a thrower with a radial lug for extending and retracting the bolt when turned by a key carrying a proper code. Turning of the thrower through a sufficient distance to shift the bolt is normally blocked by a dogging lever with which the thrower lug abuts. The thrower lug also sweeps a cam track on a second lever so as to pivot the latter during initial turning movement of the thrower away from its rest position. The second lever carries an electromagnet. While the electromagnet remains de-energized there is no interaction between the two levers so that the second lever can pivot independently of the first and turning of the thrower remains limited. When a correct key code is detected, however, the electromagnet is energized to hold the two levers together. Initial turning of the thrower thereby causes the second lever to carry the dogging lever away from its blocking position and thus free the thrower for 360.degree. movement.