EP0429226A2 - Serrure à gorges pivotantes - Google Patents

Serrure à gorges pivotantes Download PDF

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Publication number
EP0429226A2
EP0429226A2 EP90312256A EP90312256A EP0429226A2 EP 0429226 A2 EP0429226 A2 EP 0429226A2 EP 90312256 A EP90312256 A EP 90312256A EP 90312256 A EP90312256 A EP 90312256A EP 0429226 A2 EP0429226 A2 EP 0429226A2
Authority
EP
European Patent Office
Prior art keywords
arrester
locking
key
barrel
movement
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
EP90312256A
Other languages
German (de)
English (en)
Other versions
EP0429226A3 (en
EP0429226B1 (fr
Inventor
John Johns-Hunt
William Keith Robinson
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 EP0429226A2 publication Critical patent/EP0429226A2/fr
Publication of EP0429226A3 publication Critical patent/EP0429226A3/en
Application granted granted Critical
Publication of EP0429226B1 publication Critical patent/EP0429226B1/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
    • E05B21/00—Locks with lamelliform tumblers which are not set by the insertion of the key and in which the tumblers do not follow the movement of the bolt e.g. Chubb-locks

Definitions

  • the present invention relates to lever locks.
  • 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 belly shape is common to all of the levers so that the corresponding key bit pattern cannot be surreptitiously derived simply by inspection of the shape of the bellies through the keyhole.
  • the barrel member which turns with the key has a longitudinal slot of a width sufficient only to accommodate the bit of the key and is normally held by a spring detent in the key-entry position in which it masks the lever bellies from any form of inspection. Nevertheless, with appropriate tools and skill it may be possible to manipulate this member to positions in which its slot faces the regions of the bellies swept by the key, and thereby to read the wear pattern through the slot.
  • the present invention seeks to provide an improved solution to the potential threat of reading lever wear patterns in a lever lock of the kind where at least one end of the respective paths swept by the key on the lever bellies occurs at different points on different levers and accordingly proposes a lock including a barrel member to turn with the correct key and having a longitudinal slot to accommodate the key bit, and an arrester member which in one position blocks the barrel member from being turned to the extent which would enable its slot to face a region of the lever bellies wherein said different points are located, said arrester member being linked to the bolt or other such locking member such as to prevent displacement of the arrester member from said one position in the locking condition of the locking member but the arrester member being displaceable from said one position by movement of the correct key when the latter is turned to move the locking member to its unlocking condition.
  • the illustrated lock 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 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. Since different levers must be lifted through different distances it follows that the lengths of the paths swept on different lever bellies by the respective key steps will also differ.
  • the lock also includes a barrel-and-curtain member 11 (see also Figure 3) 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. It will be appreciated that in this position the barrel 12 masks the lever bellies 10 from any form of inspection by means of a tool inserted through the keyhole and into the barrel.
  • 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 access through the leg portion of the keyhole, however, whenever it is turned away from the illustrated position.
  • the lock is of generally conventional form.
  • the barrel-and-curtain member 11 (and drill pin if provided) make it difficult for any surreptitious sight to be had of the lever bellies 10 by use of an inspection tool inserted through the keyhole, in an attempt to read the pattern of wear which is imparted to the levers by repeated usage of the key. They do not of themselves, however, preclude the possibility that the barrel might be turned by a suitable implement (other than the correct key) to face its slot 13 towards the lever bellies and thus permit such inspection.
  • the levers 5 are assumed to be conf igured such that the key bit will engage with or disengage from each belly (in accordance with its direction of turning) at an equivalent point on each lever at that end of the swept path which is at the leading end of the belly (i.e. towards the stump 6) but that the key bit will engage with/disengage from each belly at a different point on each lever at that end of the swept path which is at the trailing end of the belly (i.e. towards the pin 7). Accordingly, it is the trailing ends of the bellies which represent the vital region of which inspection must be made if information on the key code is to be derived from the lever wear pattern.
  • an additional arrester member 16 is provided.
  • This arrester is in the form of a plate located to the side of the pack of levers 5, in the same plane as the curtain 14. It 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 on the bolt. In the locking condition of Figure 1, however, the arrester 16 is prevented from displacement to the right (as viewed) by the presence of the pin 19 at one end of the slot 18. It will also be seen that the curtain 14 in this lock is formed with a lug defining abutments 20 and 21 at each end.
  • the arrester 16 must not interfere with the normal locking and unlocking movements of the bolt.
  • the correct key is inserted and given a complete turn in the clockwise sense. This firstly results in the key bit engaging the lever bellies 10 and lifting the levers to align their gates 9 with the bolt stump 6.
  • the bolt step on the key bit engages the appropriate talon 4B to begin the retracting movement of the bolt. This all occurs in the arc of movement of the key prior to the point at which the curtain abutment 21 meets the abutment 23 of the arrester, the latter condition being shown in Figure 5.
  • the coupling of the pin 19 in the slot 18 provides sufficient lost motion between the bolt 3 and arrester 16 to allow the arrester now to be shifted to the right by the abutment 21 as the key 24 completes its revolution.
  • the mechanism finishes with the bolt 3 withdrawn and the levers 5 returned to their locking positions to trap the stump 6 in their pockets 9A, the barrel-and-curtain member 11 in its Figure 1 position and the arrester 16 also withdrawn so that an abutment 25 on the arrester now lies against the curtain abutment 21.
  • the linear distance through which the bolt is retracted exceeds that through which the arrester is moved and hence in the unlocking condition the pin 19 on the bolt now lies at the right hand end (as viewed) of the arrester slot 18. Consequently, in this condition the arrester is blocked from any movement to the left and there is therefore no risk that it might be shaken or otherwise displaced so as to block with its abutment 22 subsequent anti-clockwise movement of the barrel-and-curtain member 11.

Landscapes

  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Lock And Its Accessories (AREA)
  • Mounting Of Printed Circuit Boards And The Like (AREA)
EP90312256A 1989-11-24 1990-11-09 Serrure à gorges pivotantes Expired - Lifetime EP0429226B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB898926637A GB8926637D0 (en) 1989-11-24 1989-11-24 Locks
GB8926637 1989-11-24

Publications (3)

Publication Number Publication Date
EP0429226A2 true EP0429226A2 (fr) 1991-05-29
EP0429226A3 EP0429226A3 (en) 1991-09-11
EP0429226B1 EP0429226B1 (fr) 1994-08-17

Family

ID=10666885

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90312256A Expired - Lifetime EP0429226B1 (fr) 1989-11-24 1990-11-09 Serrure à gorges pivotantes

Country Status (6)

Country Link
EP (1) EP0429226B1 (fr)
AU (1) AU628236B2 (fr)
DE (1) DE69011629T2 (fr)
GB (2) GB8926637D0 (fr)
MY (1) MY104536A (fr)
NZ (1) NZ236126A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0558276A2 (fr) * 1992-02-26 1993-09-01 Chubb Research Limited Serrure à gorges pivotantes
EP0594984A1 (fr) * 1992-10-27 1994-05-04 Theodor Kromer GmbH & Co.KG Spezialfabrik für Sicherheitsschlösser Serrure à gâchette présentant plusieurs gâchettes à gorges

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ238473A (en) * 1990-06-19 1993-11-25 Keith James Ross Lever lock having levers protected by an internal lever housing
JP4496669B2 (ja) 2001-05-24 2010-07-07 日本電気株式会社 無線携帯端末装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB374571A (en) * 1931-04-15 1932-06-16 Henry John Tibbles Improvements in mortice locks
EP0096513A1 (fr) * 1982-06-09 1983-12-21 Chubb & Son's Lock and Safe Company Limited Serrures
GB2153425A (en) * 1984-01-23 1985-08-21 Enviroment Secretary Of State Lever lock
EP0297063A1 (fr) * 1987-06-23 1988-12-28 Ab Fas Lasfabrik Serrure en forme de plaque avec levier de type culbutant

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4907431A (en) * 1988-07-13 1990-03-13 Mauer Gmbh Adjustable lock

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB374571A (en) * 1931-04-15 1932-06-16 Henry John Tibbles Improvements in mortice locks
EP0096513A1 (fr) * 1982-06-09 1983-12-21 Chubb & Son's Lock and Safe Company Limited Serrures
GB2153425A (en) * 1984-01-23 1985-08-21 Enviroment Secretary Of State Lever lock
EP0297063A1 (fr) * 1987-06-23 1988-12-28 Ab Fas Lasfabrik Serrure en forme de plaque avec levier de type culbutant

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0558276A2 (fr) * 1992-02-26 1993-09-01 Chubb Research Limited Serrure à gorges pivotantes
EP0558276A3 (fr) * 1992-02-26 1993-10-20 Chubb Research Limited Serrure à gorges pivotantes
EP0594984A1 (fr) * 1992-10-27 1994-05-04 Theodor Kromer GmbH & Co.KG Spezialfabrik für Sicherheitsschlösser Serrure à gâchette présentant plusieurs gâchettes à gorges

Also Published As

Publication number Publication date
GB2238343B (en) 1993-11-17
DE69011629T2 (de) 1994-11-24
GB2238343A (en) 1991-05-29
EP0429226A3 (en) 1991-09-11
DE69011629D1 (de) 1994-09-22
EP0429226B1 (fr) 1994-08-17
GB9024435D0 (en) 1991-01-02
NZ236126A (en) 1992-04-28
GB8926637D0 (en) 1990-01-17
AU628236B2 (en) 1992-09-10
AU6675690A (en) 1991-05-30
MY104536A (en) 1994-04-30

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