EP0428202A2 - Schiebezylinderschloss - Google Patents

Schiebezylinderschloss Download PDF

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Publication number
EP0428202A2
EP0428202A2 EP90202912A EP90202912A EP0428202A2 EP 0428202 A2 EP0428202 A2 EP 0428202A2 EP 90202912 A EP90202912 A EP 90202912A EP 90202912 A EP90202912 A EP 90202912A EP 0428202 A2 EP0428202 A2 EP 0428202A2
Authority
EP
European Patent Office
Prior art keywords
cylinder assembly
bolt
plug
detention
cylinder
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.)
Ceased
Application number
EP90202912A
Other languages
English (en)
French (fr)
Other versions
EP0428202A3 (en
Inventor
Joannes Wilhelmus Van Erp
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.)
Chubb Lips Nederland BV
Original Assignee
Chubb Lips Nederland BV
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 Chubb Lips Nederland BV filed Critical Chubb Lips Nederland BV
Publication of EP0428202A2 publication Critical patent/EP0428202A2/de
Publication of EP0428202A3 publication Critical patent/EP0428202A3/en
Ceased legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00—Accessories in connection with locks
    • E05B17/20—Means independent of the locking mechanism for preventing unauthorised opening, e.g. for securing the bolt in the fastening position
    • E05B17/2084—Means to prevent forced opening by attack, tampering or jimmying
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B13/00—Devices preventing the key or the handle or both from being used
    • E05B13/10—Devices preventing the key or the handle or both from being used formed by a lock arranged in the handle
    • E05B13/105—Devices preventing the key or the handle or both from being used formed by a lock arranged in the handle the handle being a pushbutton
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00—Accessories in connection with locks
    • E05B17/0054—Fraction or shear lines; Slip-clutches, resilient parts or the like for preventing damage when forced or slammed

Definitions

  • the present invention relates to locks and more particularly is concerned with cylinder locks of the kind where the cylinder assembly is borne in a casing for axial movement as a whole, whereby to shift a plunger or other locking member into its locking position.
  • Such locks are used e.g. in various furniture and automotive applications.
  • a retainer bolt In the locking (inner) condition of the assembly, a retainer bolt extends laterally from the cylinder into a detention in the casing, this bolt being withdrawn when the proper key is turned within the cylinder to permit the assembly to move backward, normally under spring bias, to its unlocking (outer) condition.
  • the present invention is concerned to improve the security of such cylinder locks against attacks aimed at forcibly withdrawing the cylinder assembly from its locking condition.
  • tools are available, as described e.g. in European patent application no 0297172, which comprise a hardened screw held in a frame which can be screwed into the keyway of a cylinder lock, two other clamping screws threaded through the frame then being turned against the lock casing to force the frame away from the lock.
  • the invention proposes a cylinder lock of the kind stated above where the cylinder barrel and plug are formed separately from a member which bears the retainer bolt and through which the locking member is shifted, said member being connected to the barrel by fastening means adapted to fail when subject to a predetermined load in the unlocking axial direction of the cylinder assembly which is less than that which will cause failure of the retainer bolt or its detention when in the locking condition.
  • the illustrated lock has a casing composed of parts 1, 2 and 3, parts 1 and 2 being screwed and pinned together to define a chamber wherein a cylinder assembly 4 is borne for limited sliding movement as a whole.
  • the cylinder assembly comprises a two-part barrel (or stator) 5 and a plug (or rotor) 6 and its operation can be based upon any conventional arrangement of pin or disc tumblers (not shown), it being understood that the plug 6 will normally be blocked by the tumblers against rotary movement relative to the barrel 5 but can be released for turning relative to the barrel by the insertion of a proper key into the keyway 7 to set the tumblers into their releasing positions.
  • the cylinder assembly will comprise three rows of pin tumblers, adapted to engage in dimples formed in the two sides and one edge of a flat key bit of complementary section to the keyway 7.
  • the cylinder assembly is keyed against rotation relative to the lock casing by means of a pin 8 ( Figure 3) held in a recess in the periphery of the barrel 5 and engaging in a longitudinal groove 9 in the casing part 1, and the limits of its sliding movement in the casing are set by abutment of an external annular flange 10 on the barrel against faces 11 and 12 of the casing.
  • a sliding member 13 formed at one end as a locking plunger 14.
  • the plunger 14 protrudes from the rear end of casing part 1 to accomplish the locking or control function for which the lock is intended.
  • the member 13 is formed with a transverse groove 15 in which it carries a lateral retainer bolt 16, of the configuration more fully shown in Figures 3 and 4.
  • the tip of this bolt extends into a detention 17 in the casing part 1 to retain the member 13 and cylinder assembly 4 in the inner position, against the bias of a spring 18.
  • the bolt 16 has a central profiled aperture 19 of the configuration shown in Figures 3 and 4, by which the bolt can be driven to extend and retract through the turning of a coupling element 20 associated with the cylinder plug 6.
  • the coupling element 20 is in the form of a rectangular-sectioned block as shown in Figure 5 which is normally held completely within the confines of a complementarily-sectioned recess 21 in the rear end of the plug 6.
  • the coupling element is biased to that position by means of a spring 22 acting through the retainer 23 shown in Figures 1 and 6.
  • the cylinder assembly 4 and member 13 are freed to slide under the bias of the spring 18 to their outer axial position, in which the locking plunger 14 is withdrawn to its unlocking condition, whereupon return rotation of the key throws out the bolt once more to engage in a second detention 24 in the casing part 1, by engagement of the coupling element 20 with the drive face 19B of the bolt.
  • the mechanism can be returned to the locking condition by repeat use of the key to withdraw the bolt 16, pressing the cylinder assembly in to extend the locking plunger 14, and throwing out the bolt 16 into the detention 17 once more.
  • the means whereby the member 13 is attached to the cylinder assembly 4 comprise two screws 25 ( Figures 3 and 7) which extend through bores in the member 13 parallel to but offset from the central axis of the lock, and which are threaded into complementary tapped holes in the rear of the barrel 5.
  • These screws have reduced-section necks 25A or are otherwise so formed as to fail under a predetermined axial tensile stress, which is so chosen as to ensure that in the event of an attack aimed at forcibly withdrawing the cylinder assembly 4 in the locking condition of the lock, it is the screws 25 which will fail in preference to any other part of the structure, and in particular before there is a risk of failure of the bolt 16 or its detention 17.
  • the cylinder assembly 4 can be withdrawn to what is normally its unlocking condition, as limited by the abutment of flange 10 against face 12, but the member 13 with its locking plunger 14 will be retained in the locking condition by the bolt 16. This method of attack will therefore not succeed in withdrawing the plunger 14. Furthermore, as the cylinder assembly is drawn forwardly away from member 13 the coupling element 20 will tend to disengage from its retainer 23 while the latter will be ejected a short distance by the spring 22 and will then drop down with its shoulder 23A in front of the bolt 16.
  • the invention is equally applicable to sliding cylinder locks of the kind where locking is achieved by a simple push-button action on the cylinder assembly, the retainer bolt being spring-biased to engage in a detention in the inner axial condition and use of the key being necessary only for unlocking.

Landscapes

  • Lock And Its Accessories (AREA)
EP19900202912 1989-11-11 1990-11-05 Sliding cylinder locks Ceased EP0428202A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8925546 1989-11-11
GB898925546A GB8925546D0 (en) 1989-11-11 1989-11-11 Locks

Publications (2)

Publication Number Publication Date
EP0428202A2 true EP0428202A2 (de) 1991-05-22
EP0428202A3 EP0428202A3 (en) 1991-11-13

Family

ID=10666166

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900202912 Ceased EP0428202A3 (en) 1989-11-11 1990-11-05 Sliding cylinder locks

Country Status (2)

Country Link
EP (1) EP0428202A3 (de)
GB (2) GB8925546D0 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0645509A1 (de) * 1993-09-29 1995-03-29 Indespension Limited Ein Schloss

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0120104D0 (en) * 2001-08-17 2001-10-10 Guardian Security Group Ltd An anti-theft locking device
GB2435669A (en) * 2006-03-02 2007-09-05 Martin Charles Wright Lock device for retractable security post

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4074548A (en) * 1976-12-08 1978-02-21 General Motors Corporation Lock cylinder assembly
GB2120311B (en) * 1982-05-18 1985-12-04 Chubb & Sons Lock & Safe Co Locks

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0645509A1 (de) * 1993-09-29 1995-03-29 Indespension Limited Ein Schloss

Also Published As

Publication number Publication date
GB9024242D0 (en) 1990-12-19
GB2237841A (en) 1991-05-15
GB2237841B (en) 1993-08-25
GB8925546D0 (en) 1990-01-04
EP0428202A3 (en) 1991-11-13

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