Locks

Details Locks Locks

E - Fixed Constructions

05

B

70/38

E05B 65/00 (2006.01) E05B 21/00 (2006.01) E05B 35/12 (2006.01) E05B 35/08 (2006.01)

Patent

CA 1227941

Title of the Invention: Locks Abstract of the Disclosure In a security door lock a pivoted detent deadlocks the bolt by engagement of a stump in pockets provided in the bolt. The detent is normally held in its locking position by a cam surface on the thrower and by a pack of detainers. Rotation of the correct key aligns notches in the detainers with a probe on the detent and also positions a second cam surface of the thrower adjacent to the detent, so the detent can pivot to its unlocking position under the action of a spring, and thereby free the bolt. After the bolt is shifted the final rotation of the key re-engages the cam surface against the detent to drive the detent positively back to its locking position. If required, the bolt can be double-thrown by a second ("master") key which lifts the detainers to higher positions so that second notches in the detainers now align with the detent probe. This higher lifting of the detainers also lifts a dogging slide so that the stump of the latter can pass over a projection on the bolt tail. The first ("servant") key cannot lift the detainers far enough to lift the slide and hence cannot throw or withdraw the bolt to or from its double-thrown position.

429792

Affiliated with

Also associated with

Rating

Locks does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Locks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Locks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1335040