EP0744517B1 - Improved lock with flat tumblers and changeable combination - Google Patents

Improved lock with flat tumblers and changeable combination Download PDF

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Publication number
EP0744517B1
EP0744517B1 EP96107783A EP96107783A EP0744517B1 EP 0744517 B1 EP0744517 B1 EP 0744517B1 EP 96107783 A EP96107783 A EP 96107783A EP 96107783 A EP96107783 A EP 96107783A EP 0744517 B1 EP0744517 B1 EP 0744517B1
Authority
EP
European Patent Office
Prior art keywords
bolt
teeth
laminae
pin
plates
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.)
Expired - Lifetime
Application number
EP96107783A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0744517A3 (en
EP0744517A2 (en
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
COSTRUZIONI ITALIANE SERRATURE
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, COSTRUZIONI ITALIANE SERRATURE filed Critical CISA SpA
Publication of EP0744517A2 publication Critical patent/EP0744517A2/en
Publication of EP0744517A3 publication Critical patent/EP0744517A3/en
Application granted granted Critical
Publication of EP0744517B1 publication Critical patent/EP0744517B1/en
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
    • E05B35/12—Locks for use with special keys or a plurality of keys ; keys therefor operable by a plurality of keys requiring the use of two keys, e.g. safe-deposit locks
    • E05B35/125—Locks for use with special keys or a plurality of keys ; keys therefor operable by a plurality of keys requiring the use of two keys, e.g. safe-deposit locks with changeable combination
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
    • E05B15/10—Bolts of locks or night latches
    • E05B15/108—Bolts with multiple head

Definitions

  • the present invention relates to an improved lock with flat tumblers and changeable combination, of the type disclosed in EP 0 656 454 A of application EPA 94118920.1 filed December 1, 1994 in the name of the same Applicant and forming a prior art according to Article 54(8), (4) EPC.
  • a principal aim of the present invention is to provide an improved lock with flat tumblers and changeable combination, so as to make it constructively simpler and therefore cheaper and more reliable in operation and in combination-changing operations.
  • the invention provides an improved lock with flat tumblers and changeable combination, as defined in the appended claims.
  • the reference numeral 1 designates the faceplate of the case of the lock; said case furthermore comprises the bottom 2, which is surrounded by a peripheral wall composed of the walls 3, 4, and 5, which are referenced respectively as upper, rear, and lower walls for the sake of convenience in description.
  • the reference numeral 6 designates the cover of the case.
  • a plurality of openings 7 are formed in the faceplate 1, and the pins 8 that form the bolt of the lock protrude outside through said openings, said pins being slideable in the direction A.
  • a tang 9 protrudes from the pins 8 inside the case and is constituted by a flat bar which, along the lower edge, has a plurality of teeth 10 that form a rack on which the key for moving the bolt acts.
  • Two slots 11 and 12 are formed in the tang 9 and are elongated in the direction A; a threaded bush 13 engages the first slot and rises from the bottom 2 of the case, to which it is fixed.
  • the bush 13 allows to guide the bolt during its sliding, and together with other bushes 14, 15, and 16 it acts as an engagement means for the screws which fix the cover 6 so as to close the case of the lock.
  • An equal number of flat tumblers is arranged on either side of the tang 9; one of said tumblers, generally designated by the reference numeral 17, is shown in the drawings.
  • each tumbler 17 is composed of a substantially rectangular part 18 and of a composite-shaped part 19.
  • the part 18 is hereinafter referred to as the "changing strip”, in view of its combination-changing function as specified hereinafter, whereas the part 19 will be referred to as the "blocking lamina”, in view of its ability to block the sliding of the bolt 8.
  • the strip 18 is provided with two slots 20 and 21 that are elongated in the direction B, at right angles to the direction A, and with a lower end 22 that is shaped so that it can be engaged by the profile of a conventional key 23 inserted through an opening 26 of the bottom 4 or of the cover 6 of the case.
  • the key 23 has a double web and lifts the strip in the direction B at every half-turn.
  • One edge of the strip 18 is straight and parallel to the slots 20 and 21 and has a set of teeth 24 adapted to mesh with a set of teeth 25 formed on a contiguous edge of the lamina 19.
  • the lamina 19 comprises a rectangular central portion 27 lying along the direction A; two rectangular wings 28 and 29 extend upwards and downwards therefrom, and slots 30 and 31, elongated in a direction that is parallel to the slots 20 and 21, are formed in said wings.
  • the slots 30 and 31 are engaged by the bushes 13 and 16, so that the laminae 19 can move only 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 set of teeth 33 protrudes from the upper longitudinal edge of said opening and, together with a second set of opposite teeth 34 that protrude from the lower edge of the opening 32, determines the combination of the lock.
  • the teeth 33 form tooth spaces having a square shape and such as to allow the engagement, between them, of a pin 35 having a square cross-section and protruding from both sides of the tang 9 to which it is rigidly coupled.
  • the teeth 33 of each tumbler have alternately identical heights, but said height is different from that of the teeth of the adjacent tumbler.
  • the opposite ends of the upper teeth 33 and of the lower teeth 34 delimit a passage that allows the pin 35 to pass between the opposite teeth when the tumblers are actuated by the key 23.
  • the lamina 19 is completed by two notches 37 and 36 formed respectively in the rear edge of the wing 29 that is directed towards the wall 4 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 (three on one side of the tang 9 and three on the other side thereof) are arranged between a lower plate 38 and an upper plate 39; the lower plate 38 is adjacent to the bottom 2 of the case. Since the plates 38 and 39 are substantially 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 each comprise a central portion 40 from which an expansion 41 protrudes upwards and an expansion 42 protrudes downwards.
  • the plates 38 and 39 are fixed to each other (at a distance corresponding to the thickness of the tumblers 17 and of the tang 9) by means of screws that engage spacer bushes 43 and 43a that are guided through the slots 20 and 21 of the strips 18 of the tumblers.
  • the mutual fixing of the plates 38 and 39 also locks a square pin 44 that is arranged between the expansions 41 adjacent to the wings 29 of the blocking laminae 19 in front of the notch 37.
  • the plates 38 and 39 can perform small horizontal movements in the direction A during lock combination changing.
  • slots 45, 46 and 47, 48 are provided which are elongated in the direction A and are adapted to be engaged respectively by the bushes 13 and 16 used for the vertical guiding of the laminae 19 and by the pins 49 and 50 that protrude inwards from the bottom 2 and from the cover 6.
  • the pins 49 and 50 are not higher than the thickness of the plates 38 and 39, so as to avoid interfering with the strips 18 and the laminae 19 of the tumblers.
  • a tab 51 protrudes from each one of the expansions 41 towards the upper wall 3 and extends above the strips 18.
  • a bridge 52 is fixed between the tabs 51, and recesses 53 are formed therein to accommodate respective springs 54 for pushing on the strips 18.
  • the bridge 52 furthermore has a coupling step 55 for the elastic tabs 56, which are adapted to act on the tops of the wings 28 of the blocking laminae 19.
  • Each tab 56 acts on a respective lamina, making contact with a chamfered region 56 of the wings 28.
  • the springs 54 by acting so that one affects each corresponding strip 18, are capable of pushing downwards the tumblers 17 to move and keep the pin 35 at each turn (i.e., at each half-rotation of the key) in the engagement position between the upper teeth 33 and thus block the movement of the bolt 8.
  • Respective longitudinal notches 57 are formed in the lower plate 38 and in the upper plate 39, at the pin 35.
  • the notches allow the sliding of the pin 35, and have a length that corresponds to the length of the openings 32 of the tumblers.
  • a tooth 38a is formed in the plate 38, at the lower edge of the central portion 40 that lies below the expansion 41 and above the keyhole 26; a key can act on said tooth 38a during combination-setting operations, as will become apparent hereinafter.
  • the described lock is completed by a block 58 located below the keyhole 26 for the key 23 and fixed by the bush 15, which passes therethrough, and by a stud 59 which protrudes from the bottom 2 of the case.
  • the block 58 is locked in position by the cover 6 that closes the case.
  • a flat channel 60 is formed in the block 58, and its axis intersects the rotation axis of the key; the bush 15 passes through said channel.
  • a slider 61 is guided in the channel 60 and is constituted by a plate that has a slot 62 at the bush 15.
  • a spring 63 is accommodated in a wider recess of the channel 60 and keeps the slider 61 in abutment against the bush 15 in a position in which its top protrudes out of the channel 60 up to the region where the key 23 acts.
  • a tab 64 protrudes from the slider 61 and forms, at the top, a tooth 65 that is directed upwards.
  • the tab 64 is folded so that the tooth 65 is co-planar with respect to the lower plate 38, so as to engage a hollow 66 of the expansion 42.
  • the hollow 66 is shaped so as to form a lug 67 that protrudes downwards to cooperate with the tooth 65.
  • the first user will have a change key that he will not require for combination setting, since the combination of the lock will have been factory-preset.
  • said change key hereinafter referred to as the old change key
  • This 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 old change key will allow only to preset the tumblers for combination changing, which will be performed with the new change key as follows.
  • the pin 35 by acting on the end 57a of the notch 57, moves the plates 38 and 39 by an extent corresponding to the depth of the notches 36 and 37. Since the laminae 19 cannot follow the movement of the plates 38 and 39 because they are retained by the bushes 13 and 16, the strips 18 move away from the laminae 19. As a consequence of the separation of the strips 18 from the laminae 19, the teeth 24 disengage from the teeth 25.
  • the tooth 65 engages the hollow 66 and, by abutting against the lug 67, prevents the plates 38 and 39 from performing further movements in the direction A, particularly from retracting in case of inward movements of the bolt caused by accidental impacts.
  • the old change key C is removed and the new change key C1 is inserted; said new change key is actuated so as to return the bolt 8 inside the case, i.e., clockwise in the figures.
  • the strips 18 are raised according to the new combination set by the new change key.
  • the tooth 65 disengages from the lug 67, thus releasing the plates 38 and 39.
  • the further rotation of the new change key C1 causes the engagement of the key on the tooth 38a of the plate 38 and the movement of the entire pack composed of the plates 38, 39 and of the strips 18, which is returned to a position in which it is adjacent to the laminae 19, causing the engagement of the teeth 24 between the teeth 25 before the pins 35 and 44 leave the notches 36 and 37.
  • the lock is now ready to be actuated with the new normal key, which has such a profile that when the tumblers 17 are raised, the passage formed between the mutually opposite teeth 33 and 34 is aligned with the pin 35 to allow the bolt-turning strokes.
  • the change 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. This level thus becomes a combination-setting variable together with the profile of the change key.
  • the invention fully achieves the intended aim and objects.
  • the action of the elastic laminae 56 on the laminae 19 in the combination-changing position i.e., when the pin 35 engages the notches 36, keeps the laminae 19 rested on the pin 35. In this manner, machining tolerances and plays between the various elements are recovered, and possible jammings when the sets of teeth 24 and 25 are moved to mesh together are avoided.

Landscapes

  • Lock And Its Accessories (AREA)
  • Time Recorders, Dirve Recorders, Access Control (AREA)
EP96107783A 1995-05-26 1996-05-15 Improved lock with flat tumblers and changeable combination Expired - Lifetime EP0744517B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO950266 1995-05-26
IT95BO000266A IT1279602B1 (it) 1995-05-26 1995-05-26 Perfezionamenti ad una serratura con nottolini a piastre e cifratura cambiabile

Publications (3)

Publication Number Publication Date
EP0744517A2 EP0744517A2 (en) 1996-11-27
EP0744517A3 EP0744517A3 (en) 1998-04-08
EP0744517B1 true EP0744517B1 (en) 2001-02-28

Family

ID=11340638

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96107783A Expired - Lifetime EP0744517B1 (en) 1995-05-26 1996-05-15 Improved lock with flat tumblers and changeable combination

Country Status (5)

Country Link
EP (1) EP0744517B1 (el)
ES (1) ES2155549T3 (el)
GR (1) GR3035921T3 (el)
IT (1) IT1279602B1 (el)
PT (1) PT744517E (el)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19738244C2 (de) * 1997-09-02 2002-04-11 Steinbach & Vollmann Schloß für Sicherheitstüren
DE19826869C1 (de) * 1998-06-17 2000-01-13 Steinbach & Vollmann Schloß für Hochsicherheitstüren
ITTO20020529A1 (it) * 2002-06-19 2003-12-19 Mottura Serrature Di Sicurezza Serratura di sicurezza per porte di abitazioni e simili
ITTO20050406A1 (it) * 2005-06-10 2006-12-11 Mottura Serrature Di Sicurezza Serratura di sicurezza per porte di abitazioni, cancelli e simili
CN101627172B (zh) * 2007-01-22 2013-04-24 意秀欧集团 具有高的使用灵活度的安全锁
RU2462571C2 (ru) * 2008-05-06 2012-09-27 Чиза С.П.А. Противовзломный замок
WO2009136418A1 (en) * 2008-05-06 2009-11-12 Cisa S.P.A. Break-in resistant lock

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1264745B1 (it) * 1993-12-02 1996-10-04 Italiana Serrature Affini Serratura con nottolini a piastre e a cifratura cambiabile

Also Published As

Publication number Publication date
GR3035921T3 (en) 2001-08-31
IT1279602B1 (it) 1997-12-16
EP0744517A3 (en) 1998-04-08
ITBO950266A0 (it) 1995-05-26
EP0744517A2 (en) 1996-11-27
PT744517E (pt) 2001-08-30
ES2155549T3 (es) 2001-05-16
ITBO950266A1 (it) 1996-11-26

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