EP0656454A1 - Serrure avec des gâchettes plattes et une combinaison modifiable - Google Patents

Serrure avec des gâchettes plattes et une combinaison modifiable Download PDF

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Publication number
EP0656454A1
EP0656454A1 EP94118920A EP94118920A EP0656454A1 EP 0656454 A1 EP0656454 A1 EP 0656454A1 EP 94118920 A EP94118920 A EP 94118920A EP 94118920 A EP94118920 A EP 94118920A EP 0656454 A1 EP0656454 A1 EP 0656454A1
Authority
EP
European Patent Office
Prior art keywords
combination
bolt
teeth
key
pin
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
EP94118920A
Other languages
German (de)
English (en)
Other versions
EP0656454B1 (fr
Inventor
Deo Errani
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.)
CISA SpA
Original Assignee
CISA SpA
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 CISA SpA filed Critical CISA SpA
Publication of EP0656454A1 publication Critical patent/EP0656454A1/fr
Application granted granted Critical
Publication of EP0656454B1 publication Critical patent/EP0656454B1/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
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B35/00—Locks for use with special keys or a plurality of keys ; keys therefor
    • E05B35/08—Locks for use with special keys or a plurality of keys ; keys therefor operable by a plurality of keys
    • E05B35/083—Locks for use with special keys or a plurality of keys ; keys therefor operable by a plurality of keys with changeable combination

Definitions

  • the present invention relates to a lock with flat tumblers and changeable combination.
  • Locks with flat tumblers and changeable combination are known in the art, for example from British patent no. 2,081,796, from International Application WO91/02871, from Italian patent Appln. no. 67729A/90, and from German patent no. 565,027.
  • the tumblers oscillate with respect to a fulcrum and changing the combination consists in varying the extent of said oscillation, for example by moving the tumblers with respect to the fulcrum.
  • a principal aim of the present invention is now to provide a lock with flat tumblers and changeable combination that allows to obviate the above described drawbacks.
  • the reference numeral 1 designates the faceplate of the lock casing which furthermore comprises the bottom 2, which is surrounded by a peripheral wall composed of the walls 3, 4, and 5, which are respectively referenced as upper, rear, and lower wall with reference to the drawing for the sake of convenience in description.
  • the reference numeral 6 designates the cover that closes the casing.
  • the rectangular opening 7 is formed in the faceplate 1, and the bolt 8 protrudes outside through said opening, is slideable in the direction A, and extends inside the casing with the tang 9.
  • the tang 9 is constituted by a flat bar which is less thick than the bolt 8 and lies on the centerline plane of said bolt.
  • the tang 9 has, along its lower edge, multiple teeth 10 which form a rack on which the key acts to move the bolt.
  • Two slots 11 and 12 are formed in the tang 9 and are elongated in the direction A; a threaded bush 13 engages in the first slot and rises from the bottom 2 of the casing to which it is fixed.
  • the bush 13 allows to guide the bolt during its sliding and acts, together with other bushes 14, 15, and 16, as engagement element for the screws by means of which the cover 6 is fixed so as to close the lock casing.
  • An equal number of flat tumblers is arranged on either side of the tang 9; one tumbler, generally designated by the reference numeral 17, is shown in the drawing.
  • each tumbler 17 is composed of a rectangular part 18 and of a part 19 having a composite shape.
  • the part 18 is hereinafter referenced as “changing strip” owing to its combination-changing function, as specified hereinafter, whereas the part 19 is termed “blocking lamina” owing to its ability to block the sliding of the bolt 8.
  • the strip 18 has two slots 20 and 21 which are elongated in the direction B, at right angles to the direction A, and has a lower end 22 which is shaped so that it can be engaged by the web of a key 23 with double serrations which is inserted through an opening 26 of the bottom 2 or of the cover 6 of the casing and lifts the strip in the direction B.
  • One edge of the strip 18 is straight, lies parallel to the slots 20 and 21, and has a set of teeth 24 suitable to mesh with a set of teeth 25 formed on a contiguous edge of the lamina 19.
  • the lamina 19 comprises a central portion 27 which is rectangular and extends along the direction A; two rectangular wings 28 and 29 extend upwardly and downwardly from said central portion, and slots 30 and 31 are formed in said wings; said slots are elongated in a direction that is parallel to the slots 20 and 21.
  • the slots 30 and 31 are engaged by the bushes 13 and 16 so that the laminae 19 can only move in the direction B.
  • An opening 32 is formed in the central portion 27 of each lamina and is elongated in the direction A; a series of teeth 33 protrudes from the upper longitudinal edge of said opening and determines the combination of the lock together with a second series of teeth 34 which lies opposite and protrudes from the lower edge of the opening 32.
  • the teeth 33 form gaps between them which have a square shape and allow to engage between said teeth a pin 35 having a square cross-section and protruding on either sides of the tang 9 to which it is rigidly coupled.
  • the teeth 33 of each tumbler have alternately identical heights which are however different from the height of the teeth of the adjacent tumbler.
  • the oppositely arranged ends of the upper teeth 33 and of the lower teeth 34 furthermore form a passage that allows the pin 35 to pass between the oppositely arranged teeth when the tumblers are actuated by the key 23.
  • the lamina 19 is completed by two notches 36 and 37 which are formed on the edge of the wing 28 which lies opposite to the set of teeth 25 and at the end of the opening 32 towards which the pin 35 moves when the bolt 8 is pushed out of the lock.
  • the tumblers 17 lie between two plates 38 and 39: the plate 38 is adjacent to the bottom 2 of the casing and is referenced to as “lower plate”, whereas the other plate 39 (see figure 3) is referenced to as "upper plate” as it is meant to make contact with the cover 6. Since the plates 38 and 39 are identical, their details are described hereinafter with reference only to the lower plate 38 which, as shown by figures 1 and 2, substantially duplicates the profile of the tumblers 17.
  • the plates 38 and 39 in fact include a central portion 40 from which an expansion 41 extends upwards and from which an expansion 42 extends downwards.
  • the plates 38 and 39 are mutually fixed (at a distance that is equal to the thickness of the tumblers 17 and of the tang 9) by means of screws that engage in spacer bushes 43 and 43a which are driven through the slots 20 and 21 of the strips 18 of the tumblers.
  • the mutual fixing of the plates 38 and 39 also secures a square pin 44 located between the expansions 41 in the vicinity of the wings 28 of the blocking laminae 19 but above the notch 37.
  • the plates 38 and 39 are suitable to perform small horizontal movements in the direction A when changing the combination of the lock.
  • slots 45, 46 and 47, 48 are formed in the expansions 41 and 42 of the plates 38 and 39 and at the opposite ends of the central portion 40; said slots are elongated in the direction A and are suitable to be engaged respectively by the bushes 13 and 16 used to guide the laminae 19 vertically and by pins 49 and 50 protruding inwardly from the bottom 2 and from the cover 6.
  • the height of the pins 49 and 50 does not exceed the thickness of the plates 38 and 39, so as to avoid protruding into the space between the plates 38 and 39 and so as to avoid interfering with the strips 18 and the laminae 19 of the tumblers.
  • a tab 51 extends from each expansion 41 towards the upper wall 3 for mounting a support 52 for multiple spring-loaded pins 53; each pin 53 acts on a corresponding strip 18 and is thus capable of pushing the tumblers 17 downwardly to move and keep the pin 35 in engagement position between the upper teeth 33 and thus block the movement of the bolt 8.
  • Respective longitudinal recesses 54 are formed in the lower plate 38 and in the upper plate 39 at the pin 35 (see figures 4 and 5); these recesses allow the pin 35 to slide, and their length matches the length of the openings 32 of the tumblers.
  • the recesses 54 of the lower plate 38 and of the upper plate 39 furthermore have, at the region where the teeth 24 and 25 mutually engage, a recess 55 which is shaped so as to form, in each plate 38 and 39, a tooth 56 which is located opposite to the notch 36 and is suitable to be struck by the pin 35 when the bolt 8 has extended fully out of the lock casing.
  • a lever 57 is accommodated in the recess 55 of the lower plate 38 and is articulated to a pivot 58 rigidly coupled to the bottom 2.
  • the lever 57 is thus co-planar with respect to the plate 38, has a thickness that does not exceed the thickness of the plate 38, and is L-shaped, with an arm 59 that extends horizontally and a vertical arm 60.
  • the vertical arm 60 is shaped at its end so that it is in contact with the rear flank of the tooth 56, i.e. on the side opposite to the one where the pin 35 acts.
  • the horizontal arm 59 instead has a cam 61 suitable to cooperate with the pin 35, as more clearly shown hereinafter.
  • An identical lever 57 is also accommodated in the recess 55 of the upper plate 39 and is articulated in the cover 6 and thus cooperates with the pin 35. Said lever, however, is not shown in the drawings.
  • Each user has a key that is used for normal opening and closing operations, and an auxiliary key, hereinafter referenced to as "combination-changing key" since it is used to change the combination.
  • the first user of course has a combination-changing key which he does not need to change the combination, since the combination of the lock has been set in the factory.
  • this combination-changing key (hereinafter referenced to as "old combination-changing key") must be stored in order to allow subsequent combination changing. Said combination changing can be performed, for example, when a new user of the lock wishes to prevent the previous user from opening the lock.
  • the new combination entails the use of a new combination-changing key and of a new normal key.
  • the old combination-changing key only allows to prepare the tumblers for combination changing, which is performed with the new combination-changing key as follows.
  • the old combination-changing key is inserted and turned, acting on the tumblers 17 to raise them to the level at which the notches 36 and 37 face the pins 35 and 44.
  • the notches 36 lie above the teeth 56.
  • the lock is now ready to be operated with the new normal key, which has such a profile that when the tumblers 17 are raised the passage formed between the opposite teeth 33 and 34 is aligned with the pin 35 to allow the turn strokes of the bolt.
  • the combination-changing key allows the bolt to perform the stroke for separating the strips 18 from the laminae 19 at a level that is set by the notches 36 and 37. Said level thus becomes a combination variable together with the profile of the combination-changing key.
  • this higher precision in strip movement can be obtained by providing, on the tooth 10 that performs the last turn (i.e. outward stroke) of the bolt 8 (see figures 6 and 7), a tab 62 on which the old combination-changing key C, by rotating in the direction F, can act with a central portion D of its web.
  • the height of the portion D is such that said portion passes below the end of the teeth 10, so that the contact point of the key on the tab 62 with respect to the rotation axis of the key has a smaller radius than it would have if the key acted on the flank of the tooth as in the embodiment of figures 1-5.
  • the lever 63 has, at the end that lies opposite to the fulcrum 63a, a lug 64 that lies at right angles to the plane of oscillation of said lever and engages in a recess 65 formed in at least one of the lower expansions 42 of the plates 38 and 39.
  • the recess 65 forms a supporting tooth 66 and an engagement tooth 67.
  • a spring 68 acts on the lever 63 and tends to lift it so as to move the lug 64 into engagement position behind the tooth 67.
  • the lever 63 has, in the region below the opening 26 for the key, an expansion 69 that extends upwards and in which there is a curved slot 70 whose center of curvature lies at the fulcrum 63a.
  • a pin 71 engages in the slot 70 and keeps the lever 63 guided in its plane, preventing it from shifting laterally. According to what has been shown by the above description, in normal operating conditions the plates 38 and 39 are blocked in their movement by the abutment of the pin 44 against the expansions 28 of the laminae 19, and the spring 68 keeps the lever 63 in the raised position in which the lug 64 lies outside the recess 65.
  • the plates 38 and 39 by moving from the position shown in dashed lines in figure 6 to the position shown in solid lines, cause the insertion of the lug 64 in the recess 65, so that when the combination-changing key is returned to the extraction position the lug 64, by virtue of the action of the spring 68, rises and engages behind the tooth 67, retaining the plates 38 and 39 and preventing them from performing, as a consequence of accidental impacts, movements that might make the set of teeth 24 mesh with the set of teeth 25, blocking the lock.
  • both the new combination-changing key and the old combination-changing key must have portions D that have the same height and can pass below the teeth 10.
  • the actuation of the incorrect key causes the abutment of the lug 64 on the supporting tooth 66 and blocks the rotation of the key because said incorrect key has a central portion that is higher than the portion D of the combination-changing keys in order to be able to act on the actuation teeth 10.
  • the user can thus notice the mistake he has made and replace the wrong key with the right one before the sets of teeth 24 and 25 are moved so as to mutually mesh, blocking the lock.
  • a secondary plate 72 (see Figure 8) is used instead of the oscillating lever 63; said secondary plate is guided beneath the opening 26 by the engagement of the pins 73 and 74 in slots 75 and 76 that allow the secondary plate to slide in the direction B.
  • the secondary plate is actuated by a spring 77 that rests on the wall 5 so as to move the top part 78 to the level for cooperating with the webs of the combination-changing and actuation keys and allow a lateral tooth 79 to engage in the recess 65 according to what has been described above with reference to figures 6 and 7.
  • the described lock perfectly achieves the intended aim and objects.
  • a considerable advantage resides in the fact that regardless of the combination that has been set, the strips 18 abut against the bushes 43 and 43a when the key is not inserted in the lock, so that the lower edges of the ends 22, on which the serrations of the key act, all remain at the same level, making it impossible to decipher the combination by detecting the tumblers through the opening 26.

Landscapes

  • Lock And Its Accessories (AREA)
EP94118920A 1993-12-02 1994-12-01 Serrure avec des gâchettes plattes et une combinaison modifiable Expired - Lifetime EP0656454B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT93BO000483A IT1264745B1 (it) 1993-12-02 1993-12-02 Serratura con nottolini a piastre e a cifratura cambiabile
ITBO930483 1993-12-02

Publications (2)

Publication Number Publication Date
EP0656454A1 true EP0656454A1 (fr) 1995-06-07
EP0656454B1 EP0656454B1 (fr) 1999-06-09

Family

ID=11339339

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94118920A Expired - Lifetime EP0656454B1 (fr) 1993-12-02 1994-12-01 Serrure avec des gâchettes plattes et une combinaison modifiable

Country Status (4)

Country Link
EP (1) EP0656454B1 (fr)
ES (1) ES2132311T3 (fr)
GR (1) GR3031000T3 (fr)
IT (1) IT1264745B1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0744517A2 (fr) * 1995-05-26 1996-11-27 Costruzioni Italiane Serrature Affini C.I.S.A. S.p.A. Serrure avec des gâchettes plattes et une combinaison modifiable
EP0943761A1 (fr) * 1998-03-05 1999-09-22 Costruzioni Italiane Serrature Affini C.I.S.A. S.p.A. Serrure à gorges plates et code securitéchangeable
EP1001115A1 (fr) * 1998-11-13 2000-05-17 C.R. Serrature SPA Serrure à gorges coulissantes à combinaison modifiable
EP1375790A2 (fr) * 2002-06-19 2004-01-02 MOTTURA SERRATURE DI SICUREZZA S.p.A. Serrure de sécurité pour une porte domestique
WO2009136418A1 (fr) * 2008-05-06 2009-11-12 Cisa S.P.A. Verrou antieffraction
RU2462571C2 (ru) * 2008-05-06 2012-09-27 Чиза С.П.А. Противовзломный замок

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR850869A (fr) * 1939-02-25 1939-12-28 Perfectionnements apportés aux serrures avec deux groupes de platines
US2221664A (en) * 1936-11-27 1940-11-12 Susser Hans Safety lock
DE1703277A1 (de) * 1968-04-26 1972-05-10 Kromer Kg Theodor Schloss mit auf verschiedene Schluessel umstellbaren Zuhaltungen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2221664A (en) * 1936-11-27 1940-11-12 Susser Hans Safety lock
FR850869A (fr) * 1939-02-25 1939-12-28 Perfectionnements apportés aux serrures avec deux groupes de platines
DE1703277A1 (de) * 1968-04-26 1972-05-10 Kromer Kg Theodor Schloss mit auf verschiedene Schluessel umstellbaren Zuhaltungen

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0744517A2 (fr) * 1995-05-26 1996-11-27 Costruzioni Italiane Serrature Affini C.I.S.A. S.p.A. Serrure avec des gâchettes plattes et une combinaison modifiable
EP0744517A3 (fr) * 1995-05-26 1998-04-08 Costruzioni Italiane Serrature Affini C.I.S.A. S.p.A. Serrure avec des gâchettes plattes et une combinaison modifiable
EP0943761A1 (fr) * 1998-03-05 1999-09-22 Costruzioni Italiane Serrature Affini C.I.S.A. S.p.A. Serrure à gorges plates et code securitéchangeable
EP1001115A1 (fr) * 1998-11-13 2000-05-17 C.R. Serrature SPA Serrure à gorges coulissantes à combinaison modifiable
FR2785934A1 (fr) * 1998-11-13 2000-05-19 C R Serrature Spa Serrure a gorges coulissantes a combinaison modifiable
EP1375790A2 (fr) * 2002-06-19 2004-01-02 MOTTURA SERRATURE DI SICUREZZA S.p.A. Serrure de sécurité pour une porte domestique
EP1375790A3 (fr) * 2002-06-19 2006-10-18 MOTTURA SERRATURE DI SICUREZZA S.p.A. Serrure de sécurité pour une porte domestique
WO2009136418A1 (fr) * 2008-05-06 2009-11-12 Cisa S.P.A. Verrou antieffraction
CN102016204A (zh) * 2008-05-06 2011-04-13 西莎股份公司 防侵入锁具
RU2462571C2 (ru) * 2008-05-06 2012-09-27 Чиза С.П.А. Противовзломный замок

Also Published As

Publication number Publication date
IT1264745B1 (it) 1996-10-04
EP0656454B1 (fr) 1999-06-09
ES2132311T3 (es) 1999-08-16
ITBO930483A1 (it) 1995-06-02
GR3031000T3 (en) 1999-12-31
ITBO930483A0 (it) 1993-12-02

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