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EP0558276A2 - Serrure à gorges pivotantes - Google Patents

Serrure à gorges pivotantes Download PDF

Info

Publication number
EP0558276A2
EP0558276A2 EP93301328A EP93301328A EP0558276A2 EP 0558276 A2 EP0558276 A2 EP 0558276A2 EP 93301328 A EP93301328 A EP 93301328A EP 93301328 A EP93301328 A EP 93301328A EP 0558276 A2 EP0558276 A2 EP 0558276A2
Authority
EP
European Patent Office
Prior art keywords
locking
locking member
bolt
retraction
arrester
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.)
Granted
Application number
EP93301328A
Other languages
German (de)
English (en)
Other versions
EP0558276B1 (fr
EP0558276A3 (fr
Inventor
John Johns-Hunt
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 Research Ltd
Original Assignee
Chubb Research Ltd
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 Research Ltd filed Critical Chubb Research Ltd
Publication of EP0558276A2 publication Critical patent/EP0558276A2/fr
Publication of EP0558276A3 publication Critical patent/EP0558276A3/fr
Application granted granted Critical
Publication of EP0558276B1 publication Critical patent/EP0558276B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

Definitions

  • the present invention relates to locks and more particularly to lever locks.
  • lever locks we mean locks of the well-known kind in which the key-recognition mechanism comprises a plurality of pivoted or slidable tumblers or detainers (termed “levers”) each having a surface, usually of arcuate form, (termed the “belly”) which is swept by a respective step of a bitted key when the latter is turned in the lock, whereby to shift the levers to selected relative positions in which they collectively permit retraction of the bolt or other such locking member from its locking to its unlocking position.
  • the key-recognition mechanism comprises a plurality of pivoted or slidable tumblers or detainers (termed “levers”) each having a surface, usually of arcuate form, (termed the “belly”) which is swept by a respective step of a bitted key when the latter is turned in the lock, whereby to shift the levers to selected relative positions in which they collectively permit retraction of the bolt or other such locking member from its locking to its unlocking position.
  • the present invention accordingly seeks to provide a lever lock with even greater security against unauthorised manipulation than that provided by the conventional detector lever, in particular by rendering it practically impossible to continue or make further attempts at manipulation once the mechanism has detected the attack.
  • the invention therefore resides in a lever lock comprising means which are operable, in response to the turning in the lock of an incorrect key or the like implement in the unlocking direction from an insertion position to a position in which it shifts one or more of the levers to selected positions in which retraction of the bolt or the like locking member from its locking to its unlocking position is not permitted by the levers, to prevent return movement of the implement to the insertion position.
  • the incorrect key or the like cannot be removed from the lock and access for further manipulation attempts is blocked.
  • the levers of the lock are configured such that, if shifted to certain selected relative positions which do not collectively permit retraction of the bolt or the like locking member from its normal locking to its unlocking position, retraction of the locking member through a limited distance is permitted upon further turning of the incorrect key or the like implement, and such limited retraction causes the locking member to become blocked against return movement to its normal locking position thereby preventing return movement of the implement to the insertion position.
  • the illustrated lock is intended for high security applications, e.g. for locking the door of a safe or strongroom.
  • it has a casing 1 from which is extended and retracted the head 2 of a bolt 3.
  • the plate-like tail 4 of the bolt has the usual talons or drive surfaces 4A,4B ( Figure 2) for engagement with the bolt step of the key bit when the latter is turned in the appropriate sense to extend or retract the bolt.
  • a pack of, say, ten levers 5 (of which only the nearest one is seen in Figure 1) lying in the path of the bolt stump 6.
  • the levers are pivoted on a pin 7 and biased in the anticlockwise sense (as viewed) to their locking positions by leaf springs 8.
  • Each lever has a gate 9 in its leading edge, however, which can pass the stump 6 to permit retraction of the bolt when the levers are set to their unlocking positions by turning the correct key.
  • the gates 9 in different levers will be located at different heights and the levers will all be lifted through the correct distances to align their gates with the stump 6 when the respective steps on the correct key bit sweep their bellies 10.
  • the lock also includes a barrel-and-curtain member 11 borne for rotation transversely to the line of movement of the bolt and defining the turning axis for the key.
  • the barrel part 12 has a longitudinal slot 13 of a width sufficient only to accommodate the bit of the key and in the normal locking condition of the lock is aligned as shown in Figure 1, to register with the leg portion of the corresponding keyhole in the cap (not shown) which closes the proximal side of the casing 1.
  • the curtain part 14 is in the form of a disc at the proximal end of the barrel 12, immediately behind the keyhole, and has a slot 15 to pass the key bit when in register with the keyhole. This curtain will block passage of the key or any similar bitted instrument in either direction through the leg portion of the keyhole, however, whenever it is turned away from the illustrated position.
  • the lock is of generally conventional form.
  • it comprises an arrester member 16 in the form of a profiled plate located to one side of the pack of levers 5, in the same plane as the curtain 14, and which is borne for limited sliding movement parallel to the bolt 3 by means of two slots 17,18 engaging respectively over the pin 7 and over a pin 19 mounted to the bolt.
  • the arrester 16 is held at the leftward extremity of its permissible movement (in the sense as viewed) with the bolt pin 19 at the leftward end of slot 18 and the trailing end of the arrester lying against the curtain 14. It is also held yieldably in this position by a detent spring 20.
  • the purpose of the arrester 16 is fully explained in our copending United Kingdom patent application no.
  • the illustrated lever 5 is provided with a set of so-called false notches 9B adjacent to its gate 9 and the facing edge of the bolt stump 6 is notched complementarily to enable the bolt to retract very slightly by interengagement of these notches when the lever 5 is lifted to two discrete levels apart from that which aligns its gate 9 with the stump 6.
  • These formations serve to confuse attempts to feel the gate position by the use of picking tools, in known manner. They also come into play to fulfil an additional purpose in accordance with the present invention, however, together with the arrester 16 and an additional element 27 which shall be called herein a trap plate.
  • the form of the trap plate 27 is more fully shown in Figures 5 to 7. It is a generally planar element with a profiled pocket 28 adjacent to which there is a tongue 29 bent up at an acute angle. There is also a bent up tag 30 and a bent down foot 31.
  • This plate is pivoted on a pin 32 mounted to the arrester 16 and is biased in the clockwise sense (as viewed in Figure 1) by a spring 33 held around the pin 32 and between the tag 30 and a similar tag 34 on the arrester.
  • the trap plate 27 adopts the illustrated position by abutment of its foot 31 with a shoulder 35 of the lock case 1 under the pressure of the spring 33.
  • a peripheral edge 28A of the pocket 28 in the trap plate overlies a reduced-diameter end portion 19A of the bolt pin 19 which extends laterally from the plane of the arrester 16 and slightly displaces the forward end of the trap plate laterally away from the arrester.
  • This slight tilting of the plate 27 out of true parallelism with the arrester 16 is accommodated in its pivoted connection, while the action of the spring 33 is to press the trap plate laterally against the pin end 19A in addition to its pivotal bias.
  • FIG 8 Such a state of affairs is illustrated in Figure 8, in which a false key or other implement 36 in the barrel-and-curtain 11 has lifted the illustrated lever 5 to align its false notches 9B with the bolt stump 6 and will have also lifted all of the other, non-illustrated, levers to permit retraction of the bolt 3 to the depth of the notches 9B.
  • This degree of retraction of the bolt is accomplished prior to any retraction of the arrester 16 by virtue of the lost-motion coupling between those elements as previously described, the detent spring 20 ensuring that the arrester is not displaced by friction with the bolt or through any other effect at this stage.
  • the bolt pin 19 is moved rearwardly in relation to the trap plate 27 pinned to the arrester, so that its end portion 19A moves past the peripheral edge 28A of the pocket 28 and the plate 27 is allowed to snap against the side of the arrester, thereby trapping the pin end 19A in its pocket 28.
  • the bolt 3 is blocked against return movement in the locking direction (leftward as viewed) since the pin end 19A abuts against the edge 28A of the trap plate pocket and the trailing end of the arrester 16, to which the trap plate 27 is connected, abuts against the curtain 14.
  • the bolt is of course blocked against any further movement in the unlocking direction by the lever 5, which is itself prevented from falling by its interengagement with the bolt stump.

Landscapes

  • Lock And Its Accessories (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Gates (AREA)
EP19930301328 1992-02-26 1993-02-23 Serrure à gorges pivotantes Expired - Lifetime EP0558276B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9204134 1992-02-26
GB929204134A GB9204134D0 (en) 1992-02-26 1992-02-26 Locks

Publications (3)

Publication Number Publication Date
EP0558276A2 true EP0558276A2 (fr) 1993-09-01
EP0558276A3 EP0558276A3 (fr) 1993-10-20
EP0558276B1 EP0558276B1 (fr) 1996-09-18

Family

ID=10711105

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930301328 Expired - Lifetime EP0558276B1 (fr) 1992-02-26 1993-02-23 Serrure à gorges pivotantes

Country Status (3)

Country Link
EP (1) EP0558276B1 (fr)
DE (1) DE69304737T2 (fr)
GB (2) GB9204134D0 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600071113A1 (it) * 2016-07-08 2016-10-08 Giuseppe Scarparo Serratura di sicurezza con chiave a doppia mappa perfezionata

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2308862A (en) * 1996-01-03 1997-07-09 Wealthsafe Ltd Plate tumbler locks

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112474C (fr) *
DE147264C (fr) *
DE539444C (de) * 1930-03-05 1931-11-28 Otto Diehr Chubbschloss
US2028525A (en) * 1935-01-23 1936-01-21 American Telephone & Telegraph Lock
US2028171A (en) * 1935-01-23 1936-01-21 Bell Telephone Labor Inc Lock
US2028495A (en) * 1935-01-23 1936-01-21 American Telephone & Telegraph Lock
GB541327A (en) * 1940-02-15 1941-11-24 Arthur Walter Bryan Improvements in locks
EP0429226A2 (fr) * 1989-11-24 1991-05-29 Chubb Research Limited Serrure à gorges pivotantes

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112474C (fr) *
DE147264C (fr) *
DE539444C (de) * 1930-03-05 1931-11-28 Otto Diehr Chubbschloss
US2028525A (en) * 1935-01-23 1936-01-21 American Telephone & Telegraph Lock
US2028171A (en) * 1935-01-23 1936-01-21 Bell Telephone Labor Inc Lock
US2028495A (en) * 1935-01-23 1936-01-21 American Telephone & Telegraph Lock
GB541327A (en) * 1940-02-15 1941-11-24 Arthur Walter Bryan Improvements in locks
EP0429226A2 (fr) * 1989-11-24 1991-05-29 Chubb Research Limited Serrure à gorges pivotantes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600071113A1 (it) * 2016-07-08 2016-10-08 Giuseppe Scarparo Serratura di sicurezza con chiave a doppia mappa perfezionata

Also Published As

Publication number Publication date
GB9303698D0 (en) 1993-04-14
GB2264531A (en) 1993-09-01
GB9204134D0 (en) 1992-04-08
DE69304737D1 (de) 1996-10-24
DE69304737T2 (de) 1997-02-27
EP0558276B1 (fr) 1996-09-18
EP0558276A3 (fr) 1993-10-20
GB2264531B (en) 1995-03-29

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