GB541327A - Improvements in locks - Google Patents

Improvements in locks

Info

Publication number
GB541327A
GB541327A GB285440A GB285440A GB541327A GB 541327 A GB541327 A GB 541327A GB 285440 A GB285440 A GB 285440A GB 285440 A GB285440 A GB 285440A GB 541327 A GB541327 A GB 541327A
Authority
GB
United Kingdom
Prior art keywords
key
block
improper
projection
projections
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB285440A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ARTHUR WALTER BRYAN
HENRY WILLIAM MORRIS
Original Assignee
ARTHUR WALTER BRYAN
HENRY WILLIAM MORRIS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ARTHUR WALTER BRYAN, HENRY WILLIAM MORRIS filed Critical ARTHUR WALTER BRYAN
Priority to GB285440A priority Critical patent/GB541327A/en
Publication of GB541327A publication Critical patent/GB541327A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B11/00—Devices preventing keys from being removed from the lock ; Devices preventing falling or pushing out of keys
    • E05B11/06—Devices preventing keys from being removed from the lock ; Devices preventing falling or pushing out of keys for catching skeleton or incorrect keys

Abstract

541,327. Key locks. BRYAN, A. W., and MORRIS, H. W. Feb. 15, 1940, No. 2854. [Class 44] A lock freely operable by the correct key is arranged to trap any improper key used in attempt to effect unlocking. As shown the bolt B has the usual recess co-operating with the key, and projection b co-operating with locking levers C. A pivotally mounted block D has ward projections d which can be passed by the correct key F, Fig. 2. This block is held in normal position by one or more levers E with projection e resting in a V-notch d' in the block. An improper key inserted and rotated clockwise to withdraw the bolt engages one or more of the projections d and rocks block D anticlockwise until arrested by projection e snapping into a notch d<2> and locking the block against rotation in either direction, the key being thus trapped between projections d, d' on the block. Release of the improper key is effected by a special key inserted in a second key-hole, not shown, and serving to depress levers E to release block D. The lock shown has a rotatable curtain and barrel J held in normal position with respect to the main key-hole by detent K. Block d may have an insertion of insulating material on which, in normal position, a contact plunger, not shown, rests, the contact closing an alarm circuit by riding off the insulation when the block is rotated by an improper key.
GB285440A 1940-02-15 1940-02-15 Improvements in locks Expired GB541327A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB285440A GB541327A (en) 1940-02-15 1940-02-15 Improvements in locks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB285440A GB541327A (en) 1940-02-15 1940-02-15 Improvements in locks

Publications (1)

Publication Number Publication Date
GB541327A true GB541327A (en) 1941-11-24

Family

ID=9747213

Family Applications (1)

Application Number Title Priority Date Filing Date
GB285440A Expired GB541327A (en) 1940-02-15 1940-02-15 Improvements in locks

Country Status (1)

Country Link
GB (1) GB541327A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0558276A2 (en) * 1992-02-26 1993-09-01 Chubb Research Limited Lever lock

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0558276A2 (en) * 1992-02-26 1993-09-01 Chubb Research Limited Lever lock
EP0558276A3 (en) * 1992-02-26 1993-10-20 Chubb Research Limited Lever lock

Similar Documents

Publication Publication Date Title
US1947443A (en) Removable core lock
US2655805A (en) Combined lock and seal device
GB541327A (en) Improvements in locks
US1674901A (en) Decombining device for combination locks employed for safes
US1472043A (en) Lock
GB227994A (en) Improvements relating to keyless locks
US649087A (en) Combination-lock.
GB270983A (en) An improved locking device for padlocks and other locks
GB550596A (en) Improvements in and relating to padlock cylinder retainers
US1410828A (en) Lock
US1325112A (en) Burglar-alarm lock
US1614711A (en) Interlocking device for doorlocks and the like
GB191416454A (en) Improvements in and relating to Locks.
GB281940A (en) Improvements in locks
FR2311911A1 (en) Double entry security door lock - has sprung mortice locking wedge which prevents opening from the outside when inside key is left in position
GB470235A (en) Improvements in locks
GB191100632A (en) Improvements in Latches and Locks.
GB181171A (en) Improvements in and connected with electric burglar alarms
GB1065824A (en) Locks and keys
GB542299A (en) Improvements relating to door and like fastenings
GB191403345A (en) Improvements in and relating to Locks.
GB260063A (en) Improvements in and relating to night latches
GB259321A (en) Improvements in and relating to night latches
GB328037A (en) Improvements in locks
GB405488A (en) Improvements in or relating to locking devices for locks