EP0637664B1 - Serrure à combinaison - Google Patents

Serrure à combinaison Download PDF

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Publication number
EP0637664B1
EP0637664B1 EP94305578A EP94305578A EP0637664B1 EP 0637664 B1 EP0637664 B1 EP 0637664B1 EP 94305578 A EP94305578 A EP 94305578A EP 94305578 A EP94305578 A EP 94305578A EP 0637664 B1 EP0637664 B1 EP 0637664B1
Authority
EP
European Patent Office
Prior art keywords
cam plate
fence lever
spring
lock
spring means
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
EP94305578A
Other languages
German (de)
English (en)
Other versions
EP0637664A1 (fr
Inventor
Ilan Goldman
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.)
Ilco Unican Inc
Original Assignee
Ilco Unican Inc
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 Ilco Unican Inc filed Critical Ilco Unican Inc
Publication of EP0637664A1 publication Critical patent/EP0637664A1/fr
Application granted granted Critical
Publication of EP0637664B1 publication Critical patent/EP0637664B1/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
    • E05B37/00—Permutation or combination locks; Puzzle locks
    • E05B37/08—Permutation or combination locks; Puzzle locks with tumbler discs on a single axis, all the discs being adjustable by a rotary knob which is not shifted for adjusting the discs

Definitions

  • This invention relates to combination locks. More particularly, the invention relates to tumbler scrambling manipulation combination locks, of the kind including a housing with a lock dial shaft rotatably mounted therein, a lock bolt movable in the housing, a fence lever pivotally coupled to the lock bolt, a spring means constantly urging the fence lever into an operative lock bolt displacing position thereof, an assembly of gated tumbler wheels rotatable by the lock dial shaft, and a slotted driver disc mounted on the tumbler wheel assembly, the fence lever being adapted to close against the said gated tumbler wheels when in alignment therewith and thereby enter its operative position to enable the displacement of the lock bolt by the fence lever.
  • Such a combination lock is known from GB-A-735 148, which represents the closest prior art, and US-A-2 601 774.
  • an assembly comprising a displaceable cam plate coupled to a cam disc associated with the slotted driver disc and a second spring means coupled between the fence lever and the cam plate, and acting in opposition to the first spring means, the assembly operating such that on every revolution of the cam disc the cam plate is displaced thereby varying the tension in the second spring means so that the fence lever moves between a non-operative position when the cam plate is in its non-displaced position and an operative position when the cam plate is in its displaced position depending on the balance of the forces exerted on the fence lever by the first and second spring means.
  • a conventional combination lock mechanism generally denoted 10 disposed within a housing 12.
  • the mechanism 10 comprises a plurality of tumbler wheels, generally denoted W (the upper, exposed tumbler wheel is designated W1), axially mounted and coupled to a lock shaft 14. Every tumbler wheel is provided with a recess or gate G (for example the tumbler wheel W1 comprises a gate G1).
  • the gates G of all wheels become aligned, so that fence arm feeler pin 16'' (shown only from above) can enter into the space formed by the gates G and, thereby, nose 16' of the pivoted, spring-biased fence lever 16 enters cam slot 18' of driver disc 18.
  • a spring 20 is coupled to the fence lever 16 for normally urging the fence lever 16 into its active, gates penetrating position.
  • the driver disc 18 is keyed to the lock shaft 14 by key 22. Turning the lock shaft 14 from the outside of the door by the dial knob (not shown) causes the withdrawal of lock bolt 24 to open the door. All these features of construction and operation are well-known and need not be further described in the present context.
  • a driver disc 118 provided according to the present invention is of a little smaller diameter than the disc 18 of the conventional lock mechanism of Fig. 1. Furthermore, the disc 118 is formed with an upwards protruding, concentric cam disc 126 (which may conveniently be integrally made with the driver disc 118). The cam disc 126 is circular except for a segment 126' which is removed or cut away as shown. The location of the segment 126' relative to the fence lever nose engaging recess 118' is preset according to a functional consideration explained below.
  • the fence lever 116 having the conventional fence feeler pin 116" further comprises a tiny bore 128 for a purpose to be described further below.
  • the cam spring plate comprises a generally U-shaped opening 132, configured at one side with a radius 132' somewhat larger than that of the cam disc 126, and at its other side with a linear surface 132".
  • the cam plate 130 further comprises at its other end U-shaped cut-off 134 configured to slidingly receive between its legs 134a and 134b the head portion of the conventional bolt 136.
  • An opening 138 which is preferably but not necessarily elongated, is provided in the cam plate 130 at a portion 139 thereof, which extends in the direction of the respective housing wall (see Fig. 4), and comprises a linear surface 139'.
  • a profiled wire spring 140 comprising four portion 140a, 140b, 140c and 140d which are bent away relative to each other as shown.
  • the portion 140a is inserted from above into the opening 128 of the fence lever 116 and the portion 140d, in turn, is inserted from below into the opening 138 of the cam spring plate 130.
  • the tension of the wire spring 140 is such that in one position of the cam plate 130 relative to the fence lever 116 (as explained below), the spring 140 overcomes the force of the spring 120, and in another position of the plate the spring 120 overcomes the attraction of the spring 140.
  • the cam plate 130 In the assembled state of the lock 110, the cam plate 130 is seated over both the driver disc 118 and the fence lever 116.
  • the cam disc 126 freely fits into the opening 132, and the bolt 136 into the cut-out 134.
  • the spring 140 is installed as described above so that in the depicted, inoperative position of the lock, the spring is in tension, biasing the portion 140b to move in the clockwise direction (as seen in Fig. 3), so that the lever 116 is constantly pushed away from the tumbler wheels engaging position, i.e. neutralizing the force of the spring 120. Therefore, for as long as the cam plate 130 is stationary, no contact will be made between the lever 116 and the driving disc 118.
  • the cam plate 130 During rotation of the driver disc 118 (and of the cam disc 126) by the dial shaft 114 in the conventional manner, the cam plate 130 remains in fact stationery, except for when the cut-away segment 126' becomes operative - see Fig. 4 - namely once on every full rotation. At such point, the displacement of the cam plate 130 by a small distance (to the right) under the influence of the spring 140 relieves some of the tension of the spring, so that it no longer overcomes the force of the spring 120. The spring 120 therefore moves the lever 116 towards its operative position allowing momentary contact of the fence feeler pin 116" against the rim of the tumbler W or of the nose 116' into the engaging recess 118', if the proper combination dialling has been completed.
  • the manipulation tampering method is based on the fact that, in the known lock, the nose 16' of the fence lever 16 (Fig. 1) becomes released from the outer contour of the driver disc 18, to somewhat enter into and then withdraw from the slot 18' in a cyclic fashion, and that the skilled manipulator is able to detect these two occurrences ("contact points").
  • the nose 116' is held out of contact with the driver disc 118' except for the momentary contact area during each revolution of the disc. It is thus clear that due to the operation of the cam plate 130, such tempering method is completely obviated.
  • the dial shaft must be rotated in a reverse direction (from the "0" position).
  • the nose portion 116' will become engaged by the cam slot 118', as shown in Figure 4, and the lock bolt 124 may thus be displaced into its unlocked, withdrawn position , Fig. 4.
  • the application of the present invention is extremely simple and low-cost. It involves the addition of only two additional components (cam plate 130 and spring 140) and minor alteration of the driver disc 18; the general design of the convention lock is not upset whatsoever, which renders the incorporation of the extra parts in most existing models of non-manipulation-proof combination locks fairly convenient.

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  • Lock And Its Accessories (AREA)

Claims (4)

  1. Serrure à combinaison comprenant un boîtier (112) dans lequel est monté de façon tournante un arbre d'affichage de combinaison de serrure (114), un pêne de serrure (124) déplaçable dans le boîtier (112), un levier de mentonnet (116) relié de façon pivotante au pêne de serrure (124), un moyen élastique (120) qui rappelle constamment le levier de mentonnet (116) à sa position active de déplacement du pêne, un ensemble (W) de roues de basculement à créneau (W1) déplaçables en rotation par l'arbre d'affichage de combinaison de serrure (114), et un disque d'entraînement à encoche (118') monté sur l'ensemble de roues de basculement (W), le levier de mentonnet (116) étant prévu pour s'appliquer contre lesdites roues de basculement à créneau (W) lorsqu'il est en alignement avec celles-ci, afin de prendre sa position active permettant le déplacement du pêne (124) par le levier de mentonnet (116), caractérisé par un dispositif comprenant une plaque de came déplaçable (130) couplée à un disque de came (126) associé au disque d'entraînement à encoche (118'), et un deuxième moyen élastique (140) attaché entre le levier de mentonnet (116) et la plaque de came (130) et agissant en opposition au premier moyen élastique, le dispositif agissant de sorte que, à chaque tour du disque de came (126), la plaque de came (130) est déplacée et modifie ainsi la tension du deuxième moyen élastique (140) d'une manière telle que le levier de mentonnet (116) se déplace entre une position inactive lorsque la plaque de came est dans sa position non déplacée et une position active lorsque la plaque de came (130) est dans sa position déplacée, en fonction de l'équilibre des forces exercées sur le levier de mentonnet (116) par le premier (120) et le deuxième (140) moyens élastiques.
  2. Serrure à combinaison suivant la revendication 1, dans laquelle ledit deuxième moyen élastique (140) est un ressort du type à fil métallique.
  3. Serrure à combinaison suivant la revendication 2, dans laquelle le ressort à fil métallique (140) comprend une première partie (140b) connectée, à une extrémité (140a), au levier de mentonnet (116) et une deuxième partie (140c) connectée, à une extrémité, à la plaque de came (130), les deux parties (140b, 140c) étant agencées suivant un angle l'une par rapport à l'autre de sorte que le ressort (140) est en tension lorsque la plaque de came (130) est dans la position non déplacée, la première partie (140b) étant sollicitée de manière à exercer sur le levier de mentonnet (116) une force qui est supérieure à la force exercée par le premier moyen élastique (120), la tension du ressort (140) étant au moins partiellement relâchée lorsque la plaque de came (130) est dans la position déplacée, de sorte que la force exercée par le premier moyen élastique (120) est supérieure à la force exercée sur le levier de mentonnet(116) par le ressort à fil (140).
  4. Serrure à combinaison suivant la revendication 2 ou la revendication 3, dans laquelle la plaque de came (130) est couplée au disque de came (126) par une ouverture (132) sensiblement en forme de U fermé, le disque de came (126) étant circulaire avec un segment enlevé (126') pour venir en prise avec le côté fermé (132") de l'ouverture (132).
EP94305578A 1993-07-30 1994-07-28 Serrure à combinaison Expired - Lifetime EP0637664B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL106534A IL106534A0 (en) 1993-07-30 1993-07-30 Manipulation proof combination lock
IL10653493 1993-07-30

Publications (2)

Publication Number Publication Date
EP0637664A1 EP0637664A1 (fr) 1995-02-08
EP0637664B1 true EP0637664B1 (fr) 1997-10-29

Family

ID=11065095

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94305578A Expired - Lifetime EP0637664B1 (fr) 1993-07-30 1994-07-28 Serrure à combinaison

Country Status (4)

Country Link
EP (1) EP0637664B1 (fr)
CA (1) CA2119985A1 (fr)
DE (1) DE69406508T2 (fr)
IL (1) IL106534A0 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2660873A (en) * 1949-08-11 1953-12-01 Yale & Towne Mfg Co Combination lock
US2601774A (en) * 1949-09-29 1952-07-01 Diebold Inc Combination lock
GB735148A (en) * 1953-06-19 1955-08-17 Chubb & Sons Lock & Safe Co Improvements in and relating to permutation locks
US2807954A (en) * 1954-07-06 1957-10-01 Harry C Miller Combination lock
US3045466A (en) * 1960-02-08 1962-07-24 Diebold Inc Manipulation resistive combination lock
US3176486A (en) * 1963-07-12 1965-04-06 Diebold Inc Manipulation resistive combination lock
US4756176A (en) * 1985-11-30 1988-07-12 La Gard, Inc. Fence lever control device for a combination lock
US4910981A (en) * 1989-03-17 1990-03-27 Gartner Klaus W Automatically locking and tumbler scrambling manipulation proof lock

Also Published As

Publication number Publication date
EP0637664A1 (fr) 1995-02-08
CA2119985A1 (fr) 1995-01-31
DE69406508T2 (de) 1998-03-26
DE69406508D1 (de) 1997-12-04
IL106534A0 (en) 1993-11-15

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