EP0903455B1 - Effraction-resistant device for a lock with flat tumblers - Google Patents

Effraction-resistant device for a lock with flat tumblers Download PDF

Info

Publication number
EP0903455B1
EP0903455B1 EP98116877A EP98116877A EP0903455B1 EP 0903455 B1 EP0903455 B1 EP 0903455B1 EP 98116877 A EP98116877 A EP 98116877A EP 98116877 A EP98116877 A EP 98116877A EP 0903455 B1 EP0903455 B1 EP 0903455B1
Authority
EP
European Patent Office
Prior art keywords
tumblers
bolt
teeth
pin
casing
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
EP98116877A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0903455A2 (en
EP0903455A3 (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
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 EP0903455A2 publication Critical patent/EP0903455A2/en
Publication of EP0903455A3 publication Critical patent/EP0903455A3/en
Application granted granted Critical
Publication of EP0903455B1 publication Critical patent/EP0903455B1/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
    • E05B63/00—Locks or fastenings with special structural characteristics
    • E05B63/0017—Locks with sliding bolt without provision for latching

Definitions

  • the present invention relates to an effraction-resistant device for a lock with flat tumblers.
  • Locks of this type (also known as double-pattern locks) comprise a bolt sliding in a case which has a tang provided with a rack-like set of teeth for moving the bolt by means of a double-pattern actuation key and of a transverse square locking pin which protrudes from both faces of the tang to engage in openings of the tumblers.
  • the openings are elongated in the direction in which the bolt slides and have, along their longitudinal edges, mutually opposite teeth which form passages through which said square pin travels in steps which correspond to successive turns of the lock.
  • the tumblers When the key is actuated, by means of the coded serrations the tumblers are moved into a mutual arrangement whereby the subsequent rotation of the key allows to slide the square pin between the mutually opposite teeth to allow the extraction or retraction of the bolt with respect to the box-like body.
  • the tumblers retract and are kept in their inactive position, i.e, in the position for blocking the square pin, by means of respective springs which act between a peripheral wall of the box-like body of the lock and an edge of the tumbler.
  • a drawback of double-pattern locks is the fact that the tumblers can be accessed from outside through the keyhole and can be fraudulently moved by skillfully using suitable picks so as to allow to move the bolt.
  • the aim of the present invention is to provide a device which can prevent the fraudulent opening of locks with flat tumblers but is more effective and economically advantageous.
  • an effraction-resistant device for a lock with plate tumblers comprising a bolt sliding in a casing and having a tang provided with a rack-like set of teeth for moving the bolt by means of a double-pattern actuation key and a transverse pin for locking the bolt so that it is engaged in openings of the tumblers which are elongated in the direction in which the bolt slides, said openings having, along their longitudinal edges, mutually opposite teeth which form passages through which said transverse pin can travel by successive key turns, said tumblers having two slots which are elongated at right angles to said tang and are engaged by respective guiding pins in order to guide said tumblers, in contrast with return springs, at right angles to the direction in which the bolt slides, characterized in that one of said guiding pins is fixed and the other one is movable and has opposite ends which are rigidly coupled, with play, in respective seats formed in respective mutually opposite walls of said casing, so as to allow movements of said pin in said slots and oscil
  • the lock comprises a casing 1 which is composed of a bottom 2 which is surrounded by a peripheral wall composed of two longitudinal walls 3 and 4 and of a transverse wall 5.
  • the walls 3, 4 and 5 are respectively referenced as upper, lower and rear walls with reference to the drawing for the sake of convenience in description.
  • the reference numeral 6 designates the cover for closing the casing.
  • the casing 1 is associated, for example by means of rivets 16, with a front faceplate 7 in which the rectangular opening 8 is formed; the bolt 9 of the lock, which is slideable in the direction A, protrudes outside through said opening.
  • the bolt 9 continues inside the casing with the tang 10.
  • the tang 10 is constituted by a flat bar which is thinner than the bolt 9 and lies on the centerline plane which is co-planar to the bolt.
  • the tang 10 has, along its lower edge, a set of teeth 11 which is shaped like a rack.
  • a slot 12 is formed in the tang 9 and is elongated in the direction A.
  • a pin engages in said slot and is formed by an internally threaded bush 13 which rises from the bottom 2 of the casing whereto it is fixed.
  • the bush 13 allows to guide the tang 10 during the extraction and retraction strokes of the bolt 9 with respect to the casing and, together with other bushes 14 and 15, acts as engagement for the screws by means of which the cover 6 is fixed so as to close the casing 1 of the lock.
  • the rack 11 is aligned with the centerline plane C of the bolt 9 and the opening 17 for inserting the double-pattern key to actuate the lock is located below said rack.
  • An opening which is symmetrical to the opening 17 is provided in the cover 6 as well.
  • Each set is composed of three adjacent tumblers 18, 19 and 20.
  • Each tumbler is composed of a substantially rectangular part 21 with an upper edge 22 and a lower edge 23 wherefrom an expansion 24 protrudes toward the lower wall 4.
  • Expansions 24 and 25 protrude toward the upper wall 3 and toward the lower wall 4 from the rectangular part 21; said expansions have respective slots 26 and 27 which are parallel to each other and are elongated in the direction D at right angles to the direction A.
  • the rectangular part 21 has a beak 28 with a lower profile 29 which is shaped so that it can be engaged by the double-pattern key inserted in the opening 17 of the bottom 2 or of the cover 6.
  • An opening 30 is formed in the part 21 of each tumbler and is elongated in the direction A.
  • a series of teeth 31 protrudes from the upper longitudinal edge of said opening and is arranged so as to face a second set of teeth 32 which protrudes from the lower edge of the opening 30.
  • the teeth 31 and 32 form, between them, approximately square tooth spaces which allow the insertion therein of a square locking pin 33 which protrudes from both sides of the tang 10 with which it is rigidly coupled.
  • the heights of the teeth 31 of each tumbler are alternately equal but are different according to a given coding with respect to the height of the teeth of the adjacent tumbler.
  • the mutually opposite ends of the upper teeth 31 and of the lower teeth 32 also delimit a passage which is slightly lower than the height of the square pin 33, so as to allow said pin to pass between the mutually opposite teeth when the two sets of tumblers 18, 19 and 20 are actuated by the key.
  • Respective rods 34, 35 and 36 protrude upward from the tumblers 18, 19 and 20 of the two sets and are guided in holes of a plate 37 which is fixed at right angles to the bottom 2 of the casing 1.
  • the rods 34, 35 and 36 have abutment shoulders for respective cylindrical springs 38 which are fitted over the rods.
  • the springs 38 by abutting against the plate 37, keep all the tumblers in the position for engagement on the pin 33.
  • a pin 39 is driven through said slots.
  • Lugs 40 having a smaller diameter protrude axially from the opposite ends of the pin 39 and enter seats 41 and 42 of the bottom 2 and of the cover 6 of the casing.
  • the seats 41 and 42 are constituted by slots which are inclined with respect to the axis A and their inclination is such that when the pin 39 is actuated against the wall 5 it also moves upward, i.e., toward the upper wall 6.
  • the two sets of tumblers 18, 19 and 20 are mutually divided, as specified above, by a space determined by the tang 10 of the bolt 9.
  • a flap 43 having the same thickness protrudes into said space and is fixed to the lower wall 4 of the casing.
  • the flap 43 lies between the expansions 25 of the tumblers and is provided with an opening 44 through which the pin 39 is driven.
  • the dimensions of the opening 44 are such as to surround the pin 39 without ever making contact therewith.
  • the flap 43 at the level of the expansions 25, is crossed by a pin 45 which is rigidly coupled thereto and has a tooth 46 on the side directed toward the expansions 25.
  • a series of notches is formed in the edges of the expansions 24 which are directed toward the pin 45 and form a rack-like set of teeth 47 which is parallel to the respective slots 26.
  • the pin 39 keeps the slots 27 at right angles to the sliding direction A of the bolt and therefore the tooth 46 remains spaced from the set of teeth 47.
  • the lugs 40 of the pin 39 As the tumblers are gradually lifted by a pick, the lugs 40 of the pin 39, due to the inclined orientation of the seats 41 and 42, move along said seats 41 and 42, allowing the expansions 25 to stop against the pin 45. In this position, the tooth 46 engages the notches of the set of teeth 47 and locks the tumblers, preventing their alignment with the square pin 33.
  • the pin 39 due to the thrust applied thereto by the springs 38 by means of the tumblers, is guided by the inclination of the seats 41 and 42 into the bottom of said seats, so as to return the tumblers into the position in which they are disengaged from the tooth 46.
  • the pin 39 closes the space between the two sets of tumblers and the tang 10, so that it is fully inaccessible from outside. Accordingly, it is not available to any external locking action which, by preventing the oscillation of the tumblers, would expose the lock to effraction attempts.
  • the device is susceptible of numerous modifications and variations, within the scope of the claims. For example, it is possible to provide two or more teeth which are formed in one or more pins rigidly coupled to the flap 43 and are adapted to engage the set of teeth of the expansions 25. Likewise, it is possible to form on the expansions 25 one or more teeth which engage in a corresponding set of teeth formed in the flap 43.

Landscapes

  • Lock And Its Accessories (AREA)
  • Buckles (AREA)
  • Switches With Compound Operations (AREA)
  • Burglar Alarm Systems (AREA)
EP98116877A 1997-09-18 1998-09-07 Effraction-resistant device for a lock with flat tumblers Expired - Lifetime EP0903455B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO970565 1997-09-18
IT97BO000565A IT1295184B1 (it) 1997-09-18 1997-09-18 Dispositivo antieffrazione per una serratura con nottolini a piastre.

Publications (3)

Publication Number Publication Date
EP0903455A2 EP0903455A2 (en) 1999-03-24
EP0903455A3 EP0903455A3 (en) 1999-06-30
EP0903455B1 true EP0903455B1 (en) 2003-07-16

Family

ID=11342539

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98116877A Expired - Lifetime EP0903455B1 (en) 1997-09-18 1998-09-07 Effraction-resistant device for a lock with flat tumblers

Country Status (4)

Country Link
EP (1) EP0903455B1 (es)
ES (1) ES2203864T3 (es)
IT (1) IT1295184B1 (es)
PT (1) PT903455E (es)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI114330B (fi) 2002-03-27 2004-09-30 Bjoekboda Laas Oy Ab Haittalevylukko
GB2439327B (en) * 2006-06-23 2011-08-03 Surelock Mcgill Ltd Deadlock assembly
RU2461692C2 (ru) * 2007-10-31 2012-09-20 Чиза С.П.А. Устойчивый к взлому замок
ATE510984T1 (de) * 2007-10-31 2011-06-15 Cisa Spa Einbruchsicheres schloss
IT1395220B1 (it) * 2009-05-20 2012-09-05 Gruben Italia Security S P A Serratura di sicurezza.
IT1400499B1 (it) * 2010-06-11 2013-06-11 Iseo Serrature Spa Serratura di sicurezza del tipo a piastre di riferma particolarmente per porte blindate
IT1400873B1 (it) * 2010-07-05 2013-07-02 Dierre Spa Serratura del tipo a doppia mappa, con dispositivo per prevenire la sua decodificazione.
IT1403933B1 (it) * 2011-02-11 2013-11-08 Securemme S R L Serratura di sicurezza
ITTO20110461A1 (it) * 2011-05-26 2012-11-27 Dierre Spa Serratura del tipo a doppia mappa, con dispositivo per prevenire la sua decodificazione
ITTO20110510A1 (it) * 2011-06-09 2012-12-10 C R Serrature S P A Serratura a doppia mappa con sicurezza anti-palpeggio
EP2915937A1 (en) 2014-03-04 2015-09-09 KALE Kilit ve Kalip Sanayi A.S. Safety lock with additional security
RU2648626C1 (ru) * 2017-02-16 2018-03-26 Общество с ограниченной ответственностью "МЕТТЭМ-ПРОИЗВОДСТВО" Замок и устройство механизма замка
RU2658611C1 (ru) * 2017-08-01 2018-06-21 Михаил Юрьевич Рылеев Замок
RU2658609C1 (ru) * 2017-08-24 2018-06-21 Михаил Юрьевич Рылеев Замок
RU2658610C1 (ru) * 2017-09-01 2018-06-21 Михаил Юрьевич Рылеев Замок
IT201900003473A1 (it) * 2019-03-11 2020-09-11 Juwel S R L Piastrino per serratura perfezionato.
RU2710684C1 (ru) * 2019-08-27 2020-01-09 Сергей Григорьевич Кузовников Сувальдный замок
RU2722182C1 (ru) * 2019-11-29 2020-05-28 Шалва Вахтангович Пицхелаури Дверной замок сувальдный (варианты)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL173782C (nl) * 1970-10-30 1984-03-01 Spaci Sa Klavierslot met beveiligingsinrichting tegen inbraak.
IT227825Y1 (it) * 1992-03-24 1998-01-21 Italiana Serrature Affini Perfezionamento nelle serrature a piu' nottolini
DE4226269C1 (de) * 1992-08-08 1993-12-23 Wittkopp Carl Gmbh Co Kg Sicherheitsschloß für Wertbehälter
IT1279714B1 (it) * 1995-12-20 1997-12-16 Italiana Serrature Affini Serratura con nottolini a piastre

Also Published As

Publication number Publication date
ES2203864T3 (es) 2004-04-16
EP0903455A2 (en) 1999-03-24
PT903455E (pt) 2003-11-28
IT1295184B1 (it) 1999-05-04
ITBO970565A0 (it) 1997-09-18
EP0903455A3 (en) 1999-06-30
ITBO970565A1 (it) 1999-03-18

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