(19)
(11) EP 0 428 202 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.11.1991 Bulletin 1991/46

(43) Date of publication A2:
22.05.1991 Bulletin 1991/21

(21) Application number: 90202912.3

(22) Date of filing: 05.11.1990
(51) International Patent Classification (IPC)5E05B 27/00
(84) Designated Contracting States:
BE DE NL

(30) Priority: 11.11.1989 GB 8925546

(71) Applicant: CHUBB LIPS NEDERLAND BV
NL-3313 CS Dordrecht (NL)

(72) Inventor:
  • Van Erp, Joannes Wilhelmus
    NL-4941 KS Raamsdonksveer (NL)

(74) Representative: Obee, Robert William 
Group Patents Department Racal Group Services Limited Richmond Court 309 Fleet Road
Fleet Hampshire GU13 8BU
Fleet Hampshire GU13 8BU (GB)


(56) References cited: : 
   
       


    (54) Sliding cylinder locks


    (57) In a lock of the kind where a cylinder assembly (4) is slidable as a whole to shift a locking member (14) to its locking position and is retained in that position by a lateral retainer bolt (16) extending into an associated detention (17), a member (13) which carries that bolt (16) is formed separately from the cylinder barrel (5) and plug (6) and is connected to the barrel (5) by screws (25) which will fail when subject to a predetermined load in the unlocking axial direction of the cylinder assembly (4) which is less than that which will cause failure of the retainer bolt (16) or its detention (17). Accordingly, if an attempt is made to attack the lock by forcibly withdrawing the cylinder assembly (4) from its locking position there will ultimately be a preferential failure of the connecting screws (25). Even though the cylinder assembly (4) is withdrawn to what would be the normal unlocking position, therefore, the retainer bolt (16) and locking member (14) remain secure and unaffected.







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