Protected cylinder lock

Details Protected cylinder lock Protected cylinder lock

1975-08-18

1976-09-21

Wolfe, Robert L.

Locks

Operating mechanism

Key

70370, E05B 1516

Patent

active

039811689

ABSTRACT:
A cylinder lock mechanism of conventional type, comprising a fixed outer cylinder and an inner rotatable plug, to be mounted on a door frame, is protected by a hollow cylindrical steel casing which is fitted onto the outer cylinder of said lock mechanism. The cylindrical casing is partially closed in correspondence of the end of the cylinder lock mechanism presenting the keyhole for the insertion of the key, while it is open at the other end, which is the end directed towards the inside of the door. The outer cylinder of the cylinder lock mechanism and the protective casing are secured to the door frame independently from each other, and the outer cylinder can, if desired, rotate within the cavity of the protective casing. An additional protective disc provided with a slot for the insertion of the key into the keyhole is inserted between the front end of the cylinder lock mechanism and the internal side of the partially closed end of the casing.

REFERENCES:
patent: 1408477 (1922-03-01), Schonwald
patent: 1548131 (1925-08-01), Frejesinger
patent: 3261186 (1966-07-01), Laviana
patent: 3899907 (1975-08-01), Prahl

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1406320