FR2558883A1 - SECURITY BLOCK LOCK REPORTED, AGENCED TO PREVENT ITS FRAUDULENT OPENING - Google Patents

Abstract

1. A safety lock comprising a rotor (1) in a stator (2) housed in a hood (3) fixed to a capping plate (6), the rotor (1) having a housing (16) able to receive a key (8) and being provided, at its end opposite to the opening for the entry of the key, with a part (9, 54, 72, 79) fixed to the rotor (1) and equipped with a finger (10) designed to move a bolt (11) when the rotor (1) and the said part are rotated by the key, characterized in that it comprises means to entrain the stator (2) integrally in rotation with the rotor (1) as a result of the action of an incorrect key or of another tool in the case of an attempted fraudulent opening of the lock, this disruption as a result initiating a displacement of the axis of rotation of the finger (10) fixed to the rotor (1), or a withdrawal in axial translation of this finger relative to the bolt (11), in order to prevent any operation of the bolt (11) through the introduction of the incorrect key or other tool, the stator (2) being connected to the hood (3) by an elastic coupling element (4, 17) which can be overcome by the action of a torque between the said stator (2) and the said hood (3).

Description

The present invention relates to a service

  with an attached safety block, arranged to prevent

its fraudulent use.

  The lock targeted by the invention is of the type with a barrel comprising a rotor mounted in a stator housed in a cap attached to a funcet, the rotor having a housing capable of receiving a key and being provided at its end opposite the opening of input of the key, a piece secured to the rotor and provided with a finger for driving a bolt when the rotor and said piece are put in

rotation by the key.

  The invention therefore applies to the blocks of

  cylinder retainer having an integral rotor or cylinder

  The two cylinders can be concentric or concentric noin. The invention is also applicable

to safety blocks with pumps.

  In any case, under the action of the right key, the rotor turns in the stator, which allows

  to actuate the bolt actuator.

  It is known that in locks of the type in question, the rotor and the stator of the blocks of sC-reté are,

  as a general rule, rendered united by means of a

  seems pins or sequins placed perpendicularly

  cultively to the axis of rotation of the rotor and taking

  support on both the rotor and the stator. The introduction

  the right key moves the pins and glitter in the right combination, so that

  allow rotation of the rotor within the

  tor. Upon removal of the key, springs replace the

  pins or glitters in lock position

  lage. The rear end of the rotor carries a transmission part provided with an eccentric finger relative to the axis of rotation of the rotor. This finger penetrates into notches made in the bolt of the lock to transform the rotational movement of the rotor into a translation movement of the bolt, known manner. The fraudulent opening of reported safety locks can be obtained by means

non-destructive or destructive.

  Non-destructive means require, among other things, the application of a torque on the

  rotor with a suitable hook, also

  peeled coach, introduced in place of the key pen-

  as another suitable tool attempts to place the pins in the running position. Similarly,

  the size of a false key requires the use of

  rotation on the rotor by manipulating a key blank in safety, and gradually

  thanks to the fingerprints left by the pins.

  Among the destructive means, we know the

  forced rotation of the barrel by means of a strong pin-

  this, when the latter is sufficiently protruding from the plane of the door, or by means of a blade terminated by a lever arm introduced instead

  of the key. This forced rotation leads to the destruction

  stator fixation on the lock and consequently the rotation of the entire rotor and the

  stator linked by the pins, which allows the drive

  the bolt. Drilling the stator by means of a

  metal drill which allows access to the bolt produced

  a torque on the stator.

  We see that in all cases of

  Fraudulent, the stator is subjected to a couple of rotation. The invention aims to prevent any possibility of fraudulent opening of the lock to

  using one of the means above.

  According to the invention, the safety lock comprises means for rotating the stator in solidarity with the rotor under the action of a false key or other tool to fraudulently open the lock, and to trigger from this

  makes a displacement of the axis of rotation of the

  lidaire of the rotor, or a retraction in axial translation of the finger relative to the bolt to prevent any actuation of the bolt by introduction of the false key

or other tool.

  Thus, the invention makes it possible on the one hand

  beating the stator under the action of an abnormal torque, and secondly to change the trajectory of the bolt driving finger, to prevent it from

  engage in the notches of the bolt when maneuvering

  fraudulent. This trajectory can be modified

  by reducing the angular amplitude of the movement

  finger movement by transverse displacement of the axis of rotation of the finger, or by axial translation of the

  finger to position it outside the plane of

bolt.

  In these circumstances, any attempt to

  Irregular opening of the lock by one of the means mentioned above is doomed to failure, the bolt driving finger being automatically maintained

out of reach of the bolt.

  Other peculiarities and advantages of

  the invention will appear during the description

  which will follow, made with reference to annGex drawings which illustrate several forms of realization as non-limiting examples: - Figure 1 is an axial sectional view of a first embodiment of a lock of

  safety device according to the invention, with pins and rotor ex-

  centered whose security is achieved by reducing

  the amplitude of the rotation movement of the finger of

  bolt dragging; - Figures 2, 3 and 4 are views in

  partial elevation of the bolt and its finger

  taken in a plane perpendicular to that of Figure 1, and representing the various

  possible relative positions between the finger of

  sling and notches of the bolt in the lock of Figure 1; - Figure 5 is an axial sectional view of a second embodiment of the lock according to

  invention, corresponding to a perfective variant

Figure 1;

  FIG. 6 is a cross sectional view

  VI-VI of Figure 5, showing additional security features of the lock in

  their normal position corresponding to the position

  stator bending and rotation of the rotor without driving the stator;

  FIG. 7 is a view similar to FIG.

  Figure 6 showing the position of the lock safety members in the event of abnormal driving of the rotating stator; FIG. 8 is a fragmentary exploded perspective view of a third embodiment of the safety lock according to the invention;

  - Figures 9 and 10 are views in

  cross-cutting of the security organs of the

  Figure 8, in two different operating positions; FIG. 11 is a longitudinal elevational view of a fourth embodiment of the lock according to the invention, the part carrying the

  training finger being in the normal position of

  grumble with the bolt; - Figure 12 is a view similar to Figure 11, showing the drive finger and its support piece retracted axially relative to the bolt consecutively to an attempt to open

fraudulent lock

  - Figure 13 is an elevational view of a movable plate for moving the bolt drive finger in the embodiment of Figures 11 and 12; FIG. 14 is an axial half-sectional view, mid-elevation, with cut-outs, of a fifth embodiment of the lock according to the invention, showing the position of the various members of the

  lock when the finger is in the driving position

  bolt; FIGS. 15 and 16 are partial perspective views on an enlarged scale with respect to FIG. 14, of the lock safety devices in FIG.

  two different relative positions;

  - Figure 17 is an axial sectional view of a sixth embodiment of the lock according to

  the invention, the finger being in the normal position of

  bolt dragging; Figure 18 is an end elevational view taken along arrow F of Figure 16;

  - Figure 19 is a cross sectional view

  similar to Figure 18, showing how the bolt support piece can be automatically stopped in its axial translation movement towards the bolt, following a false maneuver

lock with a good key.

  Referring to Figure 1, we see a first embodiment of the lock referred to by the invention, wherein the lock comprises a barrel consisting of a rotor 1 of axis XX and a stator 2 off-center relative to the rotor 1, the stator 2 being housed in a cover 3 fixed to a funcet 6 closing the housing of the lock, by means of screws such as 7. The rotor 1 has a cylindrical internal housing 16 capable of receiving a key 8, and is provided, at its end opposite to the input opening of the key 8 of a part 9 secured to the rotor 1 by means of an axial screw 9a, this part 9 being provided with a longitudinal finger 10, parallel to the XX axis. The finger 10 is intended to drive a bolt 11 in translation by introduction into the notches 11 'of the latter, in a manner known per se, and to open or close the lock in the direction of

  rotation of the rotor 1, the part 9 and the finger 10.

  According to the invention, the lock comprises

  means for rotating the solid state stator 2

  with the rotor 1, under the action of a false key or another tool to fraudulently open the lock, and to thereby trigger a displacement of the axis of rotation of the finger 10, in order to prevent any actuation of the bolt 11 by introducing the false

key or other tool.

  In the embodiment illustrated in FIGS. 1 to 4, these securing means are constituted in the following manner: the stator 2 is normally kept fixed in rotation when the rotor 1 is itself rotated by the normal key 8, by means of a ball 4 housed in the wall of the cover 3, and held in abutment in a lateral notch 4a of the

  stator 2 by a spring 5 disposed in a projection

  cross-section 3a of the hood 3, contiguous to the foun-

  6. The spring 5 is supported on a screw 15 screwed into the sleeve 3a in an adjustable manner, so that

  the ball 4 pushed by the spring 5 maintains normal-

  the fixed stator 2 relative to the rotor 1, by em,

  stator 2 clutch with ball 4 engaged in the

  check mark 4a. Moreover, in the absence of the key of

  8, the rotor 1 and the stator 2 are made

  by means of pins 12, 13 capable of

  slide in corresponding housing transvers-

  2 of the stator 2, under the action of thrust springs 14 arranged in these housings, in a manner known in

  itself. Finally, the rotor 1 and the stator 2 are not

  centric, the Y-Y axis of the 2nd parallel stator

  bound to X-X, being shifted transversely to

to this one.

  This lock works in the following

  te: In the absence of the normal key 80 the rotor 1 and the stator 2 are made integral by means of the pins 12, 13 pushed by the springs U4, the

  outer pins 12 being stopped by a sail-

  longitudinal line (not shown) formed internally

  1. When the correct key 8 is inserted into the rotor 1, it comes into the position illustrated in FIG. 1, in which its notches come respectively to control the position of the pins 12, 13; the junction between each pair of pins 12, 13 is exactly at the level of the

  junction area of rotor 1 and stator 2, of

  that the rotor 1 can rotate inside the stator 2. As the key 8 is rotated from this position, the part 9 and its finger 10 rotate around the axis XX of the rotor 1, and the finger

  meshes with the bolt 11 in one of the

  11 'of the latter (Figure 2), triggering the opening or closing of the lock in the direction of rotation about the axis X-X. After rotation of the key 8 over a complete revolution, this key can be removed and the springs 14 push the pins 12, 13 which again rotate the rotor 1 and the stator 2, as before the introduction of the key 8.

  In case of fraudulent

  duction of a wrong key or attempted break-in according to the methods described above, the rotor 1 and the stator 2 are held integral in rotation by the pins 12, 13 since the absence of the right key does not allow to obtain the correct positioning of the pins 12, 13 ensuring the free rotation of the rotor 1 inside the stator 2. These two bodies rotate

  therefore together in the hood 3 after withdrawal of the

  4 inside the sleeve 3a, against the restoring force of the spring 5. Under these conditions, the finger 10 rotates, no longer around the axis XX, but around the axis YY of the stator 2 , so that its radius of rotation r around YY is significantly reduced with respect to its normal radius of rotation, the axis of rotation YY of the stator 2 being by construction more distant from the bolt 11 than the axis XX. The axis of the finger 10 could even be confused with the axis of

Y-Y rotation.

  In these circumstances, the amplitude of the movement

  finger rotation 10 <Figure 3) is insufficient.

  to fit a notch 11 ', so that the bolt 11 remains out of reach of the finger 10 and can not be trained. After termination of the fraudulent scheme, the operation of the

? 5888 3

  safety becomes normal again by using the good

key 8.

  Alternatively, the positioning of the stator 2 can be obtained by means other than the ball 4 and the spring 5, for example by a safety pin

  determined to break in case of force rotation.

  In this case, there is a definite impossibility of ac-

  bolt 11, even with the correct key, which

  may in some cases provide additional security

Dental.

  However, it can happen without there being fraudulent maneuver, that the user does not push the key sufficiently into the rotor 1. In this case, everything happens as if he had introduced a wrong key,

  and there is no displacement of the bolt.

  It can also happen that the user after insufficiently pressing the key 8, begins

  rotation of the rotor assembly Â-stator 2, then

  drives the key 8 in rotation. It causes

  the disjunction of the rotor 1 and the stator 2, which

  traine the increase in the amplitude of the rotational movement of the finger 10, and the displacement of the axis of rotation X-X, so that the finger 10 is no longer in

  the conditions of normal meshing in a

  11 'of the bolt 11 (Figure 4), and that the mechanism is blocked. To avoid this drawback, it is added (second embodiment illustrated in Figures 5 to 7), a device that secures the rotor 1 and the stator 2 for the duration of a complete revolution. In this embodiment, the lock is thus provided with a pawl 17 hinged at 16 on the funcet 6, on the side of the latter opposite the stator 2 and the rotor 1. The pawl 17 is provided with a boss 19 adapted to

  come engage in a complementary notch 21 metal

  swollen in a disk 23 and pressing on the top of a plate 22 slidable on the disk 23 fixed to the stator 2 coaxially with the latter, the side of the fountain 6 facing the bolt 11. The plate 22 is guided in its sliding by four feet or pins 24 fixed on the disc 23, under the action of a tension spring 25 hooked to the disc 23 at 26, when the boss 19 is out of the notch 21, in which it tends to be normally maintained by a return spring 27 of the pawl 17, attached to an end thereof opposite to its axis of rotation 16. The sliding plate 22 has a central recess 22a for accommodating a member 28 fixed to the rotor 1 by screws 29 The member 28 and the edge facing the recess 22a are provided with means for securing the member 28 and the plate 22 in a single rotation with the rotor 1, which can come into action when the plate 22 slides between the pins 24 under the action of the spring ort 25 from its position in Figure 6, when the boss 19 out of the notch 21. In the example described, these securing means consist of a pin 31 arranged on the edge of the recess 22a, and a conjugate mortise 32 of the member 28 (or vice versa). Finally, the screws 29 also serve to fix the part 9 supporting the

  finger 10, the member 28 and the rotor 1 (Figure 5).

  The operation of the lock of Figures 7 is as follows:

  In the waiting position, the ratchet 17 determines

  undermines the position of the disc 23 by its boss 19

  dark in the notch 21 (Figure 6), and at the same time the depression of the plate 22 by its top 22b with

  which this boss is in contact, so that the

  no 31 is removed from the mortise 32. The use of the right key allows in these conditions, the rotation

  of the rotor 1 only and the actuation of the bolt.

255,883

  1 1 On the contrary. the forced rotation of the stator 2 by a false key or by another tool causes the disk 23 to rotate, and consequently the exhaust

  boss 19 out of the notch 21 (Figure 7). The res-

  So spell 25 recalls the plate 22 which slides between the feet 24 perpendicular to the axis X-X, so that the pin 31 engages in the notch 32. Of this

  In fact, the rotor 1 and the stator 2 are joined together

  the duration of a complete revolution until the boss 19 meets the slot 21 and enters, which allows it to push the plate 22, which releases the

  pin 31 of the notch 32 by releasing the rotor 1. Pen-

  when rotating the stator rotor 1 in one block

  2 and parts 22, 23, 28, 9 and 10, the turn finger 10

  around the Y-Y axis of the stator 2, and therefore can not

  mesh with the notches of the bolt.

  It will be noted that, if the forced rotation of

  tor 2 and rotor 1 comes from a wrong maneuver

  of a user with the right cl @ (depression

  then the key can be opened again, the user can normally open the lock again

  complete turn of all these parts.

  In the third embodiment illustrated

  FIGS. 8 to 10, and applicable to pump or colloid safeties whose rotor and stator are

  concentric, we reduce or even cancel the ampli-

  rotation of the bolt control finger 10. Comae in the previous realization, a

  disc 23 having a notch 21 is integral with the sta-

  tor 2 au mroyen screws 30, and the pawl 17 returned by the spring 27 maintains the stator 2 in the normal position, disengageable manner. The disc 23 is fixed a guide 40 U-shaped rounded and projecting from the disk 23 on the side of the bolt. A circular plate 60 is housed inside the guide 40 coaxially with the rotor 1, which is accessible through a hole 33 of the disk 23. A rotor assembly 1 is fixed on the rotor 1.

  killed by a washer 34, a spacer 35, a neck

  circular slider 36 sized to be able to

  smoothing inside the guide 40, and the plate 60, by means of an axial screw 37 passing through the washer 34, the spacer 35, an elongate diametrical lumen 38 of the slide 36, a central hole of the plate 60, the

  screw 37 coming into the hole 33 of the rotor 1.

  The plate 60 is provided with a guide pin 39 that can penetrate into a hole 41 of the rotor 1, for

  ensure the positioning of the whole.

  The tray 60 is equipped with two feet 42

  protruding towards the slide 36 in the allon-

  38 which they come to introduce and, placed on either side of the feet 42, abutments 43 which engage in corresponding housing 44 formed in the slide 36 parallel to its

  light 38 on each side of it.

  Two springs 45 are placed in the boxes

  lateral elements 44 of the slide 36, bearing on the feet 43, and resiliently bias the slide 36 towards the position thereof where it is stopped by one of the stops 42 (Figure 10). when the pawl 17 is disengaged from the notch 21. The support plate 9 of the

  finger 10 is fixed on the slider 36 by means of

  tretches 46 making it possible to compensate for the thickness of the

  washer 34 and that of the head of the screw 37, these

  tretches 48 receiving screws 47 for fixing the

water 9 at the slide 36.

  The operation of this embodiment is as follows: In the standby position (FIG. 9), the ratchet

  17 whose boss 19 is laterally enlarged, immovable

  the disc 23 is stabilized by its notch 21, and at the same time presses the slide 36 by compressing the springs 45 whose ends opposite to the projecting feet 43 urge the end portions of the housings 44 opposite said stops 43, so that the axis of the slider 3S coincides with the axis XX of the rotor 1. It can be seen that, under the action of the right key, the movement of the rotor 1 is transmitted to the part 9

  carrying the finger 10, poar through the foot 39.

  43t stops and pins of the guide 42 causing

  in rotation the ring 36, to which is fixed the

water 9.

  In cnz of [laudeous work, the disc 23 crosses! obstacle opposed by the boss 1S and

  turn (Figure J10), the pawl 17 is held in

  sition raised rubbing efn by its boss 19 on the

  disc 23, which releases the slides 36 which

  placed laterally under the action of the springs 45 dragging the plate 9, whose finger 10 is closer to the axis of rotation X-X and escapes the

notches 11 'of the bolt (Figure 10).

  In the case where the key is depressed correctly only after having begun to turn the stator 2, the rotor 1 remains integral with the stator 2 which can not rotate between the lateral branches of the

guide 31 (Figure 10).

  The fourth embodiment of the lock illustrated in FIGS. 11 and 12, applicable to

  all the securities to foil the fraudulent maneuvers

  dull, can cause long-term

  tudinal on its axis of the plate 9 supporting the finger

  to move the finger 10 away from the plane of

  placement of the bolt. In this embodiment, the disk 48 secured to the stator 2 has a central recess traversed by a guide 49 fixed concentrically to the rotor 1, and in which longitudinal grooves 51 are arranged. The guide 49 receives internally a part 52 provided with lateral lugs 53. engaged inside the grooves 51, so that the part 52 can slide axially in the guide 49. In the piece 52 is fixed a plate 54 constituting a pulley axis XX, and which carries the control finger 10 of the bolt . The

  piece 52 can slide in the longitudinal guide 49

  without the possibility of angular misalignment.

  According to a feature, the invention

  sees means for automatically moving in axial translation the part 52 and therefore the finger 10 in the direction of the rotor 1, when as a result of an irregular attempt to open the lock, the stator 2 and the disk 48 are rotated with the rotor 1, and that the boss 19 of the pawl 17 comes out of its notch of the disc 48. In this example, these means consist of a hinged plate 55

  on a support 56 fixed to the function 6, for example at

  yen of a screw 50 engaged in this support 56 and passing through the plate 55. The latter has in its middle part a recess 57 corresponding to the diameter of the pulley 54 measured at the bottom of the groove, the pulley 54 being inserted into this recess. For this, it is made in two separate parts, or the plate 55 is cut in a suitable manner, as shown in Figure 13, where it is seen that it has the recess 57 communicating with the outside of the

  plate by a cutout 58 for passage of the pulley 54.

  Thus, when the plate 55 is articulated on the screw, and the pulley 54 is engaged in the central recess 57, the pulley 54 can be displaced in translation by an angular displacement of the plate 55. Finally, the latter is provided with a boss 59 capable of bearing on an associated lug 61 projecting from the disk 48 (FIG. 11), when the boss 19 of the pawl 17 is engaged in its notch 21.

  When the bosses 59 and 61 are in contact

  tact, the rotation of the correct key entails, through

  intermediate of the guide 49 and the piece 52, the rotation of the pulleyplateau 54, whose finger 10 can be inserted into a notch 11 'of the bolt 11 and move

  laterally (Figure 11). A spring 62

  on the one hand to funcet 6 and on the other hand to the extreme

  mity of the plate 55 opposed to its articulation tends to

  resiliently return plate 55 to funcet 6.

  Thus, in normal operation of the lock, the res-

  reminder spell 62 stays tense while the bosses

59 and 61 are in contact.

  When rotating the stator 2 with the rotor

  1, the disk 48 also rotates, so that its erosion

  Got 61 is disengaged from the boss 59, and the plate 55 is returned by the spring 32 to the f-oncet 6 axially driving the pulley 54, the finger 10 is then long enough to reach the notch 11 'of the bolt 11 (Figure 12). At the same time, the boss 19 of the pawl 17 has come out of the notch 21. Thus, the fraudulent opening of the lock is automatically prevented by longitudinal withdrawal of the lock.

finger 10.

  In the case where the key is not

  after having started to turn the stm-

  tor 2, the rotor can rotate indefinitely without the finger 10 can ever reach the notch of the bolt. Then simply remove the key in part and make

16 2558883

* turn the rotor-stator assembly until the pawl 17 engages in the notch 21 of the disk 48, then push the key correctly to find the

normal running.

  We will now describe the fifth mode of

  embodiment of the lock according to the invention, in

Figures 14 to 16.

  The lock is provided with a disc 63 fixed coaxially to the stator 2 on the side of the fillet 6 turned towards the bolt, and a hollow cylindrical cam 64 integral with the disc 63, in which are formed several notches 65, the cam 64 being concentric 1. A piece 66 is slidably mounted axially in a guide 67 fixed to the end of the rotor 1 by screws such as 68, and is secured to a counter-cam 69 carrying as many teeth 71 as the cam 64 comprises notches 65. The number of teeth 71 and notches 65 and their position are such that there is penetration of teeth 71 into notches 65 only for a single determined angular position corresponding to the waiting position of security.

  The plate 72 carrying the finger 10 of

  The latch of the bolt is secured to the cam follower 69, forming with the latter and the piece 66, which can slide in the grooves 51 of the guide 67 by

  guide pins 53, a monoblock assembly displaceable

  çable in axial translation along the X-X axis,

  it rotates relative to the cam 64.

  Finally, a plate 73 parallel to the funcet 6,

  is pierced with a central orifice 74 allowing the pas-

  wise of the support plate 72 of the finger 10. and is reminded

  elastically to the fillet 6 by traction springs 75. As in the previous embodiments,

  a ratchet 17 carries a boss 19 that may come into contact with

  liming in a notch 21 of the disc 63.

  At rest, the cam 64 and the counter-cam 71 are nested one inside the other under the action of the plate 73 (Figure 15), the teeth 71 being driven into the complementary notches 65. The rotation of the rotor 1 under the action of the right key causes rotation of the counter-cam 69 relative to the cam 64 immobilized by the pawl 17. The cam follower 69 can rotate after having crossed the notches 65, causing its longitudinal displacement at the same time as that of the support plate 72 and therefore the

  finger 10, which is thus advanced to the bolt in the-

  which he can mesh. The angular position of the teeth 71 of the contrecame 69 is such that outside the initial position o the cam 64 and the counter-cam 69

  are nested, there is always during the rota-

  at least two teeth 71 when in contact with the

  6U camera hero. Moreover, these two teeth 71 must

  may be substantially diametrically opposed, so as to promote the guidance of the workpiece 66 on axial translation without rotation in the guide 67

  whose depression is relatively short to reduce

reduce the size of the lock.

  In case of fraudulent practice, the rotation

  of the stator drives that of the cam 64 and the con-

  cam follower 69 which remain nested, so that the finger 10 retains its retracted position, retracted relative to the bolt, it can not operate. In the case where the key is not properly depressed until the stator has been started rotating, the two cams remain nested within one another, being

  held together by the force of recall of

  spells 75, without causing the bolt to

no blockage of the mechanism.

  The sixth embodiment of the lock according to the invention, illustrated in FIGS. 17 to 19, is applicable to sects whose spring 1 and stator 2 are eccentric, the bolt drive finger 10.

moving longitudinally.

  In this lock, the disc 76 in which is formed the notch 21 cooperating with the pawl 17, is fixed to a cylindrical part 77 extending in the cover 3, and secured in rotation with the stator 2 by screws 83. A axis 78 passes through the disk 76 and a housing of the part 77, this axis 78 being coaxial with the axis XX of the rotor 1 and having an end portion 78a slidably mounted inside the rotor 1. This portion 78a therefore constitutes a slide having the profile 78b of the key 8, and therefore can only move longitudinally in the rotor 1, without angular displacement relative thereto. The end of the axis 78 opposite the slide 78a carries the support plate 79 of the control finger 10. The rotor 1 is retained inside the stator 2 by a flange 81 at the inlet end, and by a circlip 82 at its other end. A compression coil spring 84, mounted coaxially with the axis 78, bears on the disk 76 and exerts a

  thrust on a collar 85 integral with the axis 78.

  Therefore, under the pressure of the spring 84, the end 78a is slidably engaged in the rotor 1 until

  that the flange 85 comes to a stop against the end

  the support plate 79 occupying the position 79a, retracted relative to the bolt, and shown in broken lines. Finally, the plate 79 is provided with a flange 86 coaxial with the X-X axis, for example of circular shape, and a screen 87 is held fixed and parallel to the funcet 6,

  a determined distance from the latter, by

  88 The screen 87 is pierced with a hole 89, circular if the flange 86 is circular, and a diameter allowing the passage of the latter

on both sides of the screen 87.

  In normal operation, the right key 8 pushes the assembly formed by the slide 78a, the axis 78, the plate 79 and the finger 10, by compressing the spring 84, and this from the rest position of the plate

  79a, to the position in solid lines, in the

  which the finger 10 is placed on the trajectory of the bolt and can operate it. In the absence of a key, the spring 84 brings the assembly back, and the

  finger 10 is out of range of the bolt.

  In case of forced rotation of the stator 2, the slide 78a is not pushed, so that the finger

  is kept out of reach of the bolt. In case of use

  the drawing of a blank uncut key, but the profile of the correct key 8, the slide 78a is pushed, as well as the plate 79 and the finger 10. But the rotor 1 and the stator 2 remained interdependent since the false key is not cut, rotate together, so that the plate 79 rotates about the YY axis of the stator (which is off-center relative to the rotor 11) and not around the axis XX of the burner. This therefore decreases the amplitude of the rotati movement. the finger, which is insufficient to allow the latter to reach a notch 1il 'of the bolt. as in the case

of Figure 1.

  If stator rotation starts

  2 by insufficient depression of the key 8, then

  while rotating, there is a risk of locking the mechanism by faulty meshing of the

2558B8 $

  finger 10 in a notch 11 'of the bolt. This risk is precisely eliminated by the flange 86 and the screen 87. Indeed, in normal use with the right key 8, the flange 86 passes through the screen 87 through the hole 89 during its translational movement (Figure 18 ). On the other hand, in case of rotation of the stator 2, the flange 86 rotates about the axis Y-Y, and is therefore first off-center, while remaining in its position.

  initial position retracted (corresponding to the position

  79a), as long as the key has not been fully depressed. The flange 86 is located

  therefore in the position shown in Figure 19, de-

  centered with respect to the opening 89, so that when the key is fully depressed, the shaft 78 pushes the flange 86 in abutment against the screen 87, the axis XX of the rotor 1 and the flange 86 having described a arc of the circle 90. The screen 87 therefore opposes the complete depression of the key, which allows to complete the turn at the end of which the key 8 can be depressed, the safety can then operate normally.

Claims (9)

  1 - Safety lock comprising a rotor (1) mounted in a stator (2) housed in a hood (3)   attached to a funcet (6)., the rotor (1) having a   (16) capable of receiving a key (8) and being provided at its end opposite the opening   input of the key, of a piece (9, 54, 72, 79)   rotor (1) and provided with a finger (-10) for driving a bolt (11) when the rotor (1) and said part are rotated by the key, characterized in that   what it includes means to train young people   the stator (2) in solidarity with the rotor (1) under the action of a false key or other tool   to open the lock fraudulently and to   to make a movement of the rotational axis   finger (10) integral with the rotor (1) or a re-   line in axial translation of this finger relative to the bolt (11) to prevent any actuation of the peg   (11) by introducing the false key or other tool.   2 - Lock according to claim 1, characterized   characterized in that it comprises a device able to keep the stator (2) fixed in rotation when the rotor (1) is rotated by the normal key of the lock, and to release the stator (2) in rotation under the action of the false key or other tool, such as a ball (4) housed in the wall of the cover (3), and held in abutment (4m) of the stator (2) by a spring (5) arranged in a tubular projection transverse (3a) of the hood (3).   3 - Lock according to one of claims 1   and 2, characterized in that it is provided with a   quet (17) articulated on the funct (6) on the side of the latter opposite the stator (2) and the rotor (1), provided with a boss (19) adapted to engage in a 255888 3   complementary notch (21) formed in a disk (23) fixed to the stator (2) coaxially with the latter, and on which a plate (22) can slide under the action of at least one elastic member (25) for returning when the boss (19) of the pawl (17) is out of the corresponding notch (21), in which it tends to be normally held by a return spring (27) of the pawl (17), and the sliding plate (22). has a central recess (22a) for accommodating a member (28) fixed to the rotor (1), this member (28) and the edge facing the recess (22a) being provided with means for securing the member and plate (22) rotating in a single block with the rotor (I1). the stator (2) and the disk (23) when the boss (19) of the pawl (17) leaves the notch (21) following an attempt to open the   lock by an organ other than the normal key.   4 - Lock according to claim 3, characterized   characterized in that said means for securing the piece (9) carrying the finger (10) with the plate (22) consist of a tenon (31) arranged on the edge of the recess (22a) of the plate (22) and a mortise   (32) conjugate of the aforementioned organ (28) or vice versa.   - Lock according to claim 1, characterized in that it comprises a disk (23) fixed to the stator (2) on the same side of the funcet (6) that the part (9) carrying the finger (10) actuation bolt (11), a guide (40) U-shaped and protruding from the disk (23) to which it is attached to the bolt side, a   circular plate (60) housed in this guide (40)   xially to the rotor (1) and secured to the latter, a slide (36) coaxial with the plate (60) and slidable thereon perpendicular to the axis   of the lock under the action of organs   ticks (45), this slide (36) being solidly   with the support (9) of the actuating finger (10)   bolt, and the disk (23) has a peripheral notch (21) in which can engage a protruding boss (19) of a pawl (17) hinged to the funcet (6) and elastically solicited towards the disk ( 23) by a return spring (27), so that when the boss (19) is in the notch (21). he   maintains at the bottom of the guide (40) against the request   antagonism of the aforementioned elastic members {4S> O the assembly formed by the slider (36) and the support (9) of the finger (10) and that when the boss (19) comes out of its notch (21) as a result of the use of a false key, said elastic members (45) move the slide (36) and the support (9) of the finger fflD until these parts are stopped by a foot (42) protruding from the plate (60) , the assembly constituted by the plate (60). the slider (36) and the support (9) of the finger (10) being then secured to the disk (23) and the stator (2) in rotation around the axis (X-X) of the latter.   6 - Lock according to claim 5.   characterized in that the slider (36) has a lumen (38) perpendicular to the axis (XX) of the lock and in which can slide two stops formed by projecting feet (42) of the tray ff090 and housings (44) receiving the elastic members (45) for returning the slide (36) and the abutments (43) for supporting them; projecting from the plate (60) of which they are integral   7 - Lock according to claim 1, which is   characterized in that -: - the stator (2) is integral with a disc (48) placed on the side of the funcet (6) facing the bolt (11) and which has a notch (21) in which can come s' snap a boss (19) secured to a pawl (17) hinged to the funcet (6) and resiliently biased against the disc (48); the disk (48) has a central recess crossed by a guide (49) fixed to the rotor (1)   and this guide internally receives a piece (52)   smoothing axially and carrying the finger (10) for controlling the bolt; and means are provided for automatically moving in translation in the guide (49) towards   the rotor (1) the part (52) carrying the finger (10) when   that as a result of an irregular attempt to open the lock, the stator (2) and the disk (48) are rotated with the rotor (1) and that the   boss (19) comes out of its notch (21).   8 - Lock according to claim 7, characterized   characterized in that said control means in trans-   lation of the piece (52) carrying the finger (10) are constituted by a plate (55) hinged to the funcet (6), in which is arranged a recess (57) for receiving the piece (54) for supporting the finger {10), made so as to secure this piece (54) in   axial translation with the plate (55) whose end   té is elastically biased towards the funcet and rests on a lug (61) secured to the disc (48), so that if the disc (48) and the stator (2) are rotated and that the boss (19) pawl (17) escapes from the notch (21), the end of the plate (55) disengages from the lug (61) and is folded towards the funcet (6) under the action of a elastic member (62) fixed thereto, which causes the axial sliding in the guide (49) of the piece (52) carrying the finger (10) which is then set out of reach of the bolt (11).   9 - Lock according to claim 1, characterized   characterized in that it comprises: - a disc (63) fixed coaxially with the stator on the side of the funcet (6) turned towards the bolt, and a hollow cylindrical cam (64) integral with the disc (63) in which are formed notches (65);   a piece (66) mounted to slide axially   in a guide (67) fixed to the end of the rotor (1) and integral with a cam follower (69) provided with teeth (71) complementary to the notches (65), the support (72) of the finger (10) ) of the bolt being also integral with the cam follower (69) forming with the latter and the sliding piece (66) a monobloc assembly displaceable in axial translation as it rotates relative to the cam (64); - A plate (73) parallel to the funcet (6) pierced by a central orifice (74) for receiving the support (72) of the finger (10) and recalled eléetiquement to the funcet (6) by traction springs (75) ; a pawl (17) articulated on the side of the   funct (6) facing the bolt (11X, carrying a bos-   wise (19) engageable in a corresponding notch (21) of the disc (63), and resiliently biased towards the disc (63) by a spring (27) fixed to the funcet (6); the cam (64) and the cam follower (69) being nested one inside the other at rest under the action of the plate (73) and the rotation of the rotor (1) with a normal key, provoking that of the counter-cam (69) which then deviates from the cam (64) and moves the finger (10) axially towards the bolt to its drive position of the latter, while in case of irregular attempt d opening of the lock, the rotation of the stator (2) drives that of the disc (63) and the cam (e64) so that the latter and the cam follower (69) remain nested and the finger (10) remains in the same axial position, back from the bolt it can not cause.   - Lock according to claim 1,   characterized in that it comprises: - a pawl (17) articulated on the side of the funcet (6) facing the bolt, carrying a boss (19) engageable in a corresponding notch (21) of a disc (76) attached to a room   cylinder (77) extending into the hood (3) and   lidarized in rotation with the stator (2); - An axis (78) passing through the disc and the cylindrical piece (77) and one end (78a) is slidably engaged in the rotor (1) coaxially with the latter, while its opposite end carries the finger (10). driving the bolt (11); means for elastically soliciting   to the rotor (1) the axis (78) and the finger (10)   staggered for example by a flange (85) integral with the axis (78) passing through the disk (76) placed inside the cylindrical piece (77) integral with the stator (2), and elastically urged as well as the axis (78) to the rotor (2) by an elastic member (84) coaxial with said axis and bearing on the disc (76)   in order to normally hold the finger (10) in re- relative to the bolt.   11 - Lock according to claim 10,   characterized in that it comprises a screen (87) which   fixed and parallel to the func-   end of the latter, pierced with a central opening (89) sized to be slightly larger than a coaxial flange (86) equipping the support (79) of the finger (10) to allow, from the position in removing the flange (86) and the finger (10), the axial displacement of this flange (86) through the central opening (89) and the finger (10) towards the bolt in the event of normal opening of the lock , and to oppose this displacement in case of forced rotation of the stator (2) following a deficiency   of a suitable key followed by a   complete rotation during rotation with locking, the screen (87) then forming an axial stop for the flange (86) and the finger (10) which rotate integrally with the stator (2) around the ax) e (YY} of the latter, which allows to complete the turn at the end of which a key can be depressed normally and the open lock.