FR2460815A1 - ANTI-THEFT SECURITY FOR MOTOR VEHICLE - Google Patents

Abstract

THE INVENTION IS RELATING TO ANTI-THEFT SAFETY FOR MOTOR VEHICLES WITH ELECTRICALLY ACTUATED ALARM SYSTEMS. SAFETY IS CHARACTERIZED BY THE FACT THAT THE SWITCHING DEVICE 10 SHOWS THE ELECTRICAL CONTACTS 17, 19 AUTOMATICALLY CLOSING THE CURRENT CIRCUIT 11 FOR ACTING THE ALARM SYSTEM WHEN THE VEHICLE TAKES AN INCLINED POSITION. THE INVENTION ALLOWS AN ANTI-THEFT SAFETY INSENSITIVE TO SMALL VIBRATIONS AND OPERATING STEADY ON WHEN THE VEHICLE IS TILTED IN RELATION TO ITS PARKING POSITION.

Description

24608 15

  The present invention relates to an anti-tamper

  theft for motor vehicles and more specifically

  for a motor vehicle with an alarm system

  electrical control triggered by a communication device

transfer linked to the vehicle.

  There are known anti-theft security for vehicles

  tomobile equipped with electric door contacts operating the alarm if you try to open the door. But these well-known antitheft security works only if unauthorized persons

  try to enter the vehicle. In the event of

  mounting of accessible car parts from the outside

  especially the wheels, these classic anti-theft

However, they do not react.

  In addition, anti-theft safeties are known to react.

  jerks printed on the vehicle. Certainly, these well-known devices trigger the alarm if someone is working without authorization outside the vehicle, but they are very sensitive and also react to environmental conditions having nothing to do with attempts to steal, such as when a lorry passes by or when

  strong gusts of wind shake the vehicle

tioning.

  The object of the present invention is to provide simple, economical, safe and

  small footprint reacting if we try to

  mount the wheels of the vehicle or to fully load it

  on another to remove it, but not reacting to other situations such as those

  present in normal traffic. This anti

  flight must also be able to be mounted without difficulty

afterwards.

  The present invention solves this problem in that the switching device has electrical contacts automatically closing the electrical actuation circuit of the alarm system.

  when the vehicle is placed in an inclined position.

  This design has the advantage that the

  positive alarm does not react to brief jolts but triggers suddenly on the alarm if the car is loaded on a plane inclined in another vehicle or is raised on one side, for example to disassemble a wheel. In this improved version, the switching device is constituted by a switching by

  liquid having a chamber forming a container

  filled with an electrically conductive contact liquid and contactors. Such a contactor device is simple and inexpensive to manufacture and reliable in operation. It can be mounted, under an extremely small volume, virtually anywhere on the vehicle, and the filling of

  the container chamber can be adapted precisely

  the inclination of the vehicle necessary to remove

  worm one of his wheels. One and the same switching device is therefore usable whatever

the type of vehicle.

  A switching device of the type described above

  can be conceived in various ways. For example, at the bottom and in the upper part of the chamber of the container, contacts can be arranged which, insulated relative to one another, are connected to

  opposite poles of the electrical circuit of the

  alarm system. In the present invention, the reci-

  The pillar forming the chamber has a peripheral wall.

  a non-conductive material and a bottom plate of conductive material to which is connected one of the poles of the electrical circuit. We can have on

  the peripheral walls of the container several

  contact strips spaced apart from each other and from the conducting portion of the bottom, connected to an electrical device for operating for example electronic information, triggering the alarm in case of inclination of the container found at the level of the contact rings

  if the alarm system is put on alert. The provision

  operating system is designed in such a way that it

  takes into account the initial position of the vehicle at

  alert system and only triggers the alarm system if the vessel is inclined relative to its starting position. The metal contact rings described

  above must, in the context of this invention,

  be embedded in the enveloping wall of the container.

  made of non-conductive material, in particular

  bind in plastic material. This prevents the liquidation

  of driver, tossed while the vehicle is running, to remain adhering in the form of drops to the contact rings and to trigger false contacts. It's for

  same reason as the device following the

  The invention provides that the peripheral walls of the container have an internal surface that can not be

  be wetted by the contact liquid.

  In one embodiment of the present invention,

  the container of the switching device may be constituted by a plastic tank mountable and maintainable in a vertical position on the vehicle at the vigilance of the alarm system, closed at its upper part by a metal cover, in

  which is arranged a metal bottom plate connected

  roped to an insulated conductor through the cover and

  leaving. This version is also particularly

  simple and economical to manufacture. The position

  The vertical position of the container in the vehicle can be obtained by a cardanic suspension of the container and a weight at its lower end, while the blocking of the container at the vigilance of the system.

  is effected by electromagnetic means for example.

  In a preferred embodiment, electrical detectors are used to detect detectors that are immersed at different depths in the chamber of the container and emit electrical signals when they come into contact with the conductive liquid.

  in the form of submerged detectors offer between

  the advantage that the electrical contact is made by point contact at the lower ends of the detectors and that leakage currents can not occur along the inner wall of the container

  when the contactor liquid leaves the contacts.

  In this case, the lower ends of the

  planners define a certain plan of

  to which the conductive liquid can rise for more or less inclination or tilting

pronounced of the vehicle.

  Even by using immersive detectors

  the switching device falling within the scope of

  This invention can be conceived in various ways.

  Thus, for example, for any

  to be tested in the container, provide at least

  three immersion detectors connected by a

  common driver in the data exploitation

  in which case the lower ends of said at least three immersion detectors define a height plane such as a

  guaranteed, regardless of the side to the-

  which the container is tilted at the same time as

  the vehicle. These detectors can be arranged

  on the rays starting from the central axis of the

  container, these rays star-shaped from the center of the container and forming an angle between them of 180, 900 or preferably 1200. It is furthermore recommended that even the negative pole of the switching device is connected at least to a detector by immersion reaching the vicinity of the bottom of the container. This detector can

  be placed in the middle of the container.

  The present invention also provides a provision

  in which the immersion detectors, at least those connected by a common conductor to the information-mining devices, are placed in the container at the vertices of approximately equilateral triangles, which allows a reliability of

  high switching whatever the direction in the-

  the container is tilted at the same time as the vehicle. It is particularly advisable to dispose all the contactors by immersion near the inner face of the peripheral wall of the container, which should preferably be cylindrical. What has for

  advantage of obtaining the precision of switching

  optimal for even for a slight inclination

  of the vehicle, we take advantage of the process of com-

  mutation of the greatest water level change in

  container, a detector connected to the device of ex-

  ploitation being connected, via the conductive liquid, with the detector leading to the negative pole, detector which is diametrically opposed to it. The chamber of the container which receives the conductive liquid, will preferably be in form

  a ring; it will preferably be placed on the

  of a container which may be of cylindrical shape

  drique and preferably made of plastic. The

  The annular chamber of the receptacle may thus be

  separated in a box that can receive

  see in his inner space, determined by the room

  of the annular container, the operating device

  electronic version or parts of it.

  The design of the embodiment of an annular container chamber also has the advantage of requiring only a relatively small amount of electrically conductive contactor liquid. She

  also offers the possibility of

  the data storage device in the inner housing of the container, which has, as another advantage, very short connections between the immersion detectors and the operating device. If the container chamber receiving the liquid

  conductor is designed in the form of a ring, the detec-

  Dipers provided by the present invention should be arranged in a circle above the annular chamber. Such a version of the anti-theft is simple to manufacture and ensures a sealed seat of each detector in isolation from the others, in the chamber and the lid of the container, the drivers

  leading to immersion detectors that can be

  born with a good seal through the lid in the interior space of the container or in the space

inside their lid.

  In another advantageous embodiment of the present invention, the immersion detectors

  arranged on two sides of directions substantially

  pendicular between them are united in a set

  in which the detectors of one of the assemblies are

  linked, independently of the other group, to the data exploitation device. This makes it possible to detect, independently of each other, the inclinations

  the vehicle according to the directions, because an inclination

  the latter in one direction does not affect detectors of another sense. It is generally sufficient that two detectors facing each other realize by their lower ends a switching line to the

  height to control. Detections should be available

  immersion devices of one of the sets according to

  direction or longitudinal direction

  dinal and those of the other together transversely to the vehicle. To obtain a sensitivity of reaction as fine as possible of the anti-security device

  theft of the vehicle in all its possibilities of

  possible, it is necessary that the differences in length of the detectors affected in the transverse direction

  are more important than the differences in

  those assigned to the longitudinal direction of the vehicle. According to another important feature of the present invention, the chamber of the receptacle receiving the conductive liquid is subdivided by partitions in several partial chambers providing between them a communication of the liquid. In a particular version

  interesting from this point of view, the sub-

  division of the container chamber is ensured by

  diving walls ending at a certain distance

  this from the bottom of the container chamber and thereby connecting the various partial chambers at the bottom. It is preferable to provide at least two walls

diving of this type.

  The diving walls that sink into the

  help ensure that contact does not make it possible

  to descend or descend at a reduced speed, the latter

  in the partial chambers of the room of the

  connected by intercom pipes

  This is because the conductive liquid can pass below the diving walls, near the bottom, but can not pass over it. So we do not attend

  that moderate fluctuations in the level of

  quide. There can be no boating or splashing

  liquid, because the surface of the conductive liquid in each of the partial chambers is relatively small. The diving walls can go up to

to the lid of the container.

  It is good to have the diving walls under

  an angle of about 90 to each other.

  A particularly advantageous arrangement in this

  This case consists in subdividing the diving walls

  tagging a container chamber into several chambers

  partial bricks in the form of annular circle segments

  laires each having contacts, preferably constituted by immersion detectors. It is

  it is preferable to have four dipping walls

  placed obliquely in the container relative to the axis of operation of the vehicle, which allows, both

  in the longitudinal direction as in the transverse direction

  sal, an optimum damping of fluctuations in

  calf fluid when the vehicle is shaken or shakes. Different liquids can be used as liquids

  contact, provided that they retain, in the gam-

  me of expected temperatures, their characteristics of electrically conductive liquid. One can for example

  use as the conducting liquid of the chloride of

  10 triphenyl thane or methane trifluoride fluoride

  phenyl. Conductive liquids supplemented with metal salts are particularly recommended. For example, a solution that lends itself well is glycerin

  added with copper sulphate. Such a liquid of

  tact has a certain viscosity and is somewhat syrupy, so that surface movements

  of this liquid are relatively slow.

  The present invention will be well understood by reading

  description which will follow, made in reference

  FIGS. 1 and 2 are respectively cross-sectional views in the rest position (FIG. 1) and switch position (FIG. 2) of the switching device according to the present invention; FIG. a second example of embodiment in vertical section and in switching position, Figure 4 is a third embodiment in vertical section, Figure 5 is a section along the line VV of

  FIG. 4, in which the operating device

  6 is a section along line VI-VI of FIG. 5, FIG. 7 is a fourth embodiment, in horizontal section, FIG. 8 is a section along line VIII-VIII. of Figure 7,

  Figure 9 is a fifth example of how

  In a horizontal section, FIG. 10 is a sixth preferred embodiment in vertical section, FIG. 11 is a section along the line XI-XI of FIG. 10,

  Figure 12 is a seventh example of how

horizontal section,

  Figure 13 is a section along the line XIII-

XIII of Figure 12,

  Figure 14 is a section along line XIV-

  XIV of Figure 12, Figure 15 is an eighth example of embodiment in horizontal section, Figure 16 is a ninth preferred embodiment, in vertical section.

  FIG. 17 is a section along line XVII-

  XVII of Figure 16 and Figure 18 a tenth example of execution

in horizontal section.

  In the two exemplary embodiments shown in FIGS. 1 and 2, the switching device 10 is

  constituted by a cylindrical container 14 whose

  Peripheral king 15 is made of electrically nonconductive material, for example made of polypropylene or polyethylene-based plastic. On the bottom 16 of the

  container 14 is a bottom plate 17 in

  electricity driver, preferably in

  copper. On this bottom plate 17 is fixed a

  Isolated duct 18 facing upwards in the container 14 and arriving in the open air after passing through a cover 19. Said cover 19 closes the container 14 at its upper face. It is copper just like the

  bottom plate 17 and has on the edge 20 of the recess

  and at the level of the driver 18 which passes through it, seals 21 and 22. A conductor 13 is connected to the

cover 19.

  Inside the container 14 is an electrically conductive contact liquid 23 made up, in the exemplary embodiment described, with a mixture of glycerine and copper sulphate. It can also be replaced by another conductive liquid, for example

  triphenylchloromethane or triphenylfluoro-

  methane. The container is suspended by cardan joint at a suitable place of the vehicle so as to take, once the vehicle is parked, the vertical position shown in Figure 1 even when the vehicle is parked in longitudinal or transverse inclination, for example in climb or with the wheels

  on one side on the sidewalk. Once the alarm system

  I put myself on the alert, the container 14 is then immo

  in relation to the vehicle in the vertical position

  shim shown in Figure 1. This can be done for example with the aid of an electromagnet disposed on the vehicle, the electromagnet whose coil is excited

  when connecting the alarm system and who

  holds the container 14 by a steel plate or a

  similar port fitted on the container 14, but which

  has not been shown in detail here.

  If the position of the vehicle and with it that of the

  container 14 are modified, the vehicle being for example

  raised on one side, the container 14 takes a posi-

  inclined, for example the one shown in the fi

  2. As the liquid level 24 remains horizontal, it comes into contact with the cover 19 and the conductive liquid 23 makes contact between the cover 19 and the bottom plate 17, so that the circuit

  between the negative pole 12 and the positive pole

  tif 13 and thus the control circuit leading to the alarm system are under tension. The alarm

is then triggered.

  The inner surface 25 of the peripheral wall 15 of the container 14 is designed so that it

  can not be wetted by the conductive liquid 23.

  To do this, the container 14 can be made of

  non-wettable plastic material or the surface

  upper 25 of the container 14 can receive a non-wettable coating. In the embodiment shown in FIG.

  3, the container 14 and its lid 41 are executed

  cut in plastic. The contact of the bottom 16 of the

  container is constituted as in the example of

  1 and 2, by a copper bottom plate 17, on which is welded an insulated conductor

  18 coming out through the lid'41. On the other hand,

  Tacts of the upper portion 42 of the container 14 are constituted by three copper contact rings 43, 44 and 45, parallel to the bottom 16 and embedded at a distance from each other in the inner side of the peripheral wall 15. The rings 43, 44 and 45 are respectively connected to conductors

  46, 47 and 48 leading to a device 49 for

  for example electronic, position of the

  14. As in the previous examples of

  this container is partially filled with a conductive liquid 23 whose level is indicated by

the plan reference 24.

  The best is to fix the container 14 at any point of the vehicle, but in position virtually

  vertical. It then takes, when parking the vehicle

  and according to the position thereof, a vertical position or more or less inclined, for example that of Figure 3, wherein the conductive liquid covers parts of the two lower contact rings 43 and 44, while the level 24 -of this liquid does not reach the upper contact ring 45. Once the alarm system is put in vigilance, the device controlling the electronic operation 49 records this state as starting position or

zero position.

  But if this starting position is then changed by rocking the vehicle, that is to say if it is raised laterally to disassemble a wheel, or

  if he is inclined to climb a slope,

  When changing its oblique position, the contact ring 44 loses contact with the liquid 23, or the latter 23 also touches the third contact ring marked 45 on the plane. From this

  the device controlling the electro-

  The nique receives an impulse every time that triggers the alarm. It can be seen that the device represented in FIG. 3 does not require any carding suspension of the

  container 14 and renders superfluous its suspension or fixa-

  in a vertical position when placing on the alert

  this, so that the container can be fixed mounted

and permanently in the vehicle.

  Figures 4 to 6 show a third example

  embodiment, namely a switching device

  It is designed as a liquid switch in which the cylindrical container 14 has an inner wall coaxial with the cylindrical peripheral wall 15, so that an annular chamber 56 receiving the conductive liquid 23 is formed in the container 14. The chamber container 56 is closed at the bottom by the surface of

  bottom 51 of the container bottom 16. In the upper part

  Instead, the chamber 56 is closed by the cover 19, which is sealingly secured to the upper edges of the outer circumferential wall 15 and the inner wall 50 and which according to the present invention is glued or welded to the said wall. to form a liquid tight closure. The walls and 50, the bottom 16 and the cover 19 are made of non-wettable plastic material by the contact liquid, for example polyethylene. In the annular chamber 56 are arranged, distributed in a circle above the annular space, immersion detectors 57, 58, 59, 60 and 61 driven through the cover 19 and sealed in it with the aid of FIG. The detectors 57 to 61 are in groups of three, each so distributed, above the chamber 56, that the immersion detectors of each of the groups 57, 58, 59, 60 and 61 form the vertices. 57a, 57b, 57c and 58a, 58b, 58c and 59a, 59b and 59c and 60a, 60b and 60c and 61a, 61b and 61c of substantially equilateral triangles shown

  in Figure 5 by different plots. Detections

  Immersion tips 57 are connected in common to the negative pole 13 while those of each of the groups 58, 59, 60 and 61 are each connected, in groups of three, respectively to the leads 46, 47, 48 and 62 to a control device. digital position of the container, hereinafter referred to as "operating device" 49 and arranged inside

52 of the box 53.

  The conductors 13, 46, 47, 48 and 62, which are not

  diqué that schematically in Figure 5, are actually in the form of printed circuit arranged on

  a plate 63 resting on the cover 19 of the re-

  annular container 14 so that these drivers

* printed matter is in electrical contact with

  57 to 61 correspondents embedded in

the lid 19.

  As can be seen in FIG. 6, the immersion detectors 57 connected to the negative pole 13 dive into the contact liquid 23 even when the container

  is horizontal. On the other hand, the detectors of groups

  58 to 61 are shorter, but all

  switching heads of each of the groups 58, 59, 60 and 61 have three by three, the same length,

  each of said groups defining a community plan.

  parallel to the bottom 16. It can be seen in FIG. 6 that the switching planes formed by the detectors 58, 59, 60 and 61 are at different distances from the bottom 16 distances which are represented somewhat

exaggerated in the said figure 6.

  From FIG. 5 it can be seen that the container 14 is provided with a cap 66 which engages via a collar 67 directed downwards with a bulge 65 provided on the upper edge 64 of the container 14. There is provided between the bottom 68 of the cap 66 and the printed circuit board 63 a pressure ring 69 at the U-shaped section of elastic material, for example polypropylene reinforced with

  fiberglass, so that the wafer 63 is

  pressed against the cover 19 and that a connection

  electrical connection is ensured between the conductive ends

  these immersion detectors 57 to 61 protruding from the

plate 19.

  On the underside of the wafer 63 is mounted the operating device 63 which is connected, by conductors not shown, to the alarm device, for example the buzzer of the vehicle. For the output of the drivers of the cap 66, a

central orifice 72 in the latter.

  It is preferable to set the communication device

  tation 10 in a horizontal position in an appro-

  requested vehicle not accessible to persons not

  - torisés. If by parking the vehicle, we put the alarm system on alert, the operating device 49 notes the position of the vehicle of the moment, position identified by all the detectors then plunging into

  the liquid contactor. If the vehicle is tilted

  and with it the switching device, for example if unauthorized persons raise a

  side of the vehicle to disassemble a wheel, the posi-

  The liquid level 24 of the conductive liquid 23 is modified with respect to the immersion detectors of the groups 58 to 61, so that, for example, it is no longer only the detectors of the group 58 but also those of the group 59 which are affected. by the liquid contactor 23. The operating device 49 is arranged in such a way that it then closes the electric circuit of the alarm system and triggers it. FIGS. 7 to 9 show schematically

  two other embodiments of the present invention

  vention. In the examples shown in the figures

  7 and 8, the container 14 is shown for the essential

  tiel, by a cylinder whose bottom 16 is in the form of spherical cap. The detector 57 connected to the negative pole 13 is in the middle of the container and is constantly immersed in the contactor liquid 23

  covering part of the container bottom 16.

  The other detectors 58, 59 and 60 are arranged on radial radii 75, 76, 77 and 78 starting from the central axis of the receptacle and forming between them an angle of 900 and viewed from above, an orthogonal cross. Here again, the detectors of each of the groups 58, 59 and 60 are connected to a conductor 46, 47 and 48 (in a similar manner to FIG. 5) respectively

common to each of said groups.

  FIG. 9 shows an application in which the container is present, as in that of FIGS. 7 and 8. Here too, the connected immersion detector 57

  at the negative pole 13 is in the middle of the container.

  However, the other immersion detectors are

  placed on radial radii 79, 80 and 81 forming between them an angle of 1200. Therefore, in this case, each

  group of three detectors forms a switching

  in the same way as that which is constituted each time in the example illustrated in FIG.

  in Figure 8, by four detectors.

  Figures 10 and 11 show another example of application largely similar to that of Figures 4 to 6. The container 14 is fixed inside the vehicle (not shown) on a wall or similar support so as to be virtually vertical when

  the vehicle is horizontal and the direction of mar-

  indicated by the arrow F in the figure, it is confused

  with a horizontal axis 82 passing through the center of the

  container 14, the axis hereinafter referred to as "long axis"

  "or" longitudinal direction ".

  tal 83 perpendicular to it and passing through the cen-

  M is the container 14 is designated by the expression "transverse axis" or "transverse direction" .- In the application example of Figures 10 and 11 is also seen, arranged in a circle above the annular container chamber 56, immersion detectors 55, 57, 58, 59, 60 and 61 supported by the

  lid 19 of the container and mounted waterproof in that-

  ci with a seal such as the seal 21 of Figure 4. The four detectors of each of the groups 55, 58, 59, 60 and 61 are connected together in pairs, that is to say that each two of the detectors 55, 58, 59 and 61, diametrically opposite, are connected by a

  85, 86, 87, 88 and 89 and respectively

  90, 91, 92, 93 and 94 to the operating device

  Container Position Electronic Control System

  operating positive "49 and which is in 1 '

  52 of box 53. In addition,

  57 distributed over the annular space 56 and which reach almost the bottom 16 of the container 14

  and are permanently immersed in the contact liquid

  23 are all interconnected by a driver not shown in detail here and connected to the negative pole

of the control circuit 13 ..

  In the context of this embodiment, the

  Immersion detectors 55, 58, 59, 60 and 61 are

  divided into two groups L and Q to which, for the group L, correspond the longitudinal axis 82 and for the

  group Q the transversal axis 83. In this case, the

  55Qa 58 Qa, 59Qa, 60Qa and 61Qa are located relative to the direction of travel F, the right side of the longitudinal axis 82 in the annular arc 56a of the annular space 56 which is limited by the radial rays 95 and 96 formantrespectively an angle of

  450 and 1350 with respect to the longitudinal axis 82.

  The detectors 55Qb '58Qb' 58Qb '60Qb and 61Qb appearing in the same group Q are arranged on the left side

  opposite in the direction of travel F of the longitudinal axis

  Nal 82 on an annular arc 56b limited by the radial rays 95 and 96 from the central point M. Similarly, the detectors 55La '58La' 59La '60La and 61La are arranged in the bow portion 56c with respect to the direction of travel F and the detectors 55Lb '58Lb' 59Lb '60Lb and 61Lb on the posterior arc portion 56d of the annular space 56 with respect to the direction of travel F and assigned

to the longitudinal axis.

  As we have already said, the detectors of the

  groups L and those in the Q group are connected independently

  from each other to the operating device 49, only working each time with the operating device that of the groups of which a detector

  is touched first by the conductive liquid of

  faded as a result of rocking or rocking motion. If, for example, the vehicle is raised by the left side and the container 14 tilts as a result

  along or around its "longitudinal axis" 82, the

  This contactor can, for example, reach one of the detectors Qa, for example the contactor 58Qa. The

  Group detectors Q then act by means of

  the operating device not described in detail here (device 49) while

  that detectors in group L do not emit

  switching impulses even if they are affected by

the liquid contactor.

  Conversely, only the detectors of group L par-

  participate in the switching process if a detector in this group is first hit by the liquid

  contactor, for example because the vehicle is

  raised at its front or rear end and that the

  switching device 10 is tilted around

its transverse axis 83.

  Figures 12 to 14 show an alternative to the examples cited above. Here the container 14 has a quadrangular shape. Immersion detectors are also found in the

  area of the peripheral walls of the container 14.

  The immersion detectors 55Qa '58Qa, 59Qa, 60Qa and 61 Qa are arranged on the right with respect to the direction of

  step F near one of the longitudinal walls

  and detectors 55Q] 5 58 Qb 59 Qb60Qb and 61Qb

  near the longitudinal wall 99 of the right-hand side

  that the detectors 55La '58La' 59 La6, and 6LLa are near the anterior transverse wall and the detectors 55b, 58Lb, 59Lb '6Lb and 6ILb near the posterior transverse wall 101. The detector

  immersion 57 connected to the negative pole is placed midway

place of the container 14.

  The installation works exactly like the

  switching device according to FIGS. 10 and 11

  above, with the difference that the differences

  rances of length A L are more important for

  SQa detectors corresponding to the transverse direction

  dirty R (Figure 13) as the differences in length /. detectors SLa and SLb corresponding to the

  longitudinal direction F of the vehicle (Figure 14).

  In the application example shown in the

  15, the container 14 is cylindrical and contains the conductive liquid 23. It comprises in the present embodiment a bottom 16 stamped. The

  immersion detector 57 connected to the negative pole is

  in the middle of the container 14 while the other detectors ending at different heights are

  arranged in two rows crossing at right angles.

  In this application, that of the rows which con-

  the first group L of detectors is located on the longitudinal axis 82 of the container 14 in the direction of travel F while the other group Q of detectors

  immersion is disposed on the transverse axis 83 of the

  Container 14. Group L detectors SL react when the vehicle and with it the container 14, is tilted about the transverse axis 83 while the

  The SQ sensors in the Q group only intervene if the

  hicle is raised on one side and tilts around its longitudinal axis 82. The detectors of each group are of different length and are grouped together

  in pairs, as in the other examples of applica-

  on opposite sides of the direction

  is perpendicular and are connected to the device of ex-

  49. As in the application variants described above, here too, it is one or the other

  L or Q groups of detectors acting on the

  operating system 49 when the

  mutation switches with the vehicle and that the liquid contactor just lick a detector of one or 1 '

another group.

  FIGS. 16 and 17 show an example of a particular application that strongly resembles those

  Figures 10 and 11. Here again, we isolated in the

  container 14, by a cylindrical inner wall 50, an annular container chamber 56 receiving the contact liquid 23 and in which the detectors plunge from the top. The container chamber 56 is subdivided by four plunge walls 102, 103, 104 and 105 into four ring segment spaces 56a, 56b, 56c and 56d. These plunge walls 102, 103, 104 and 105 end at a short distance from the bottom 16 of the container and plunge into the electrically conducting contactor liquid 23, the level of which is indicated by 24 on the planes. The plunge walls 102 to 105 can go to the lid 19 of the container; but in the application example shown here, they end a little below the cover 19. As can be seen from FIG. 17, the four plunge walls

  102 to 105 are arranged in such a way

  between them an angle of 90 that they are oblique with respect to the direction of travel designated by the arrow F. This means that the container 14 is mounted so that in the vehicle that the longitudinal axis of the latter is parallel to a diameter D traced in the container 14 and cutting in half the angle between two adjacent plunge walls 102 and 105 or

103 and 104.

  The plunge walls 102 to 105 can be in one piece with the walls 15 and 50 of the container 14

  but can also be stuck after the event or

  jetties in any way in space

ring 56.

  In each ring-shaped space 56a, 56b, 56c and 56d are suitably distributed around the circumference, five immersion detectors 57, 58, 59, 60 and 61 of different lengths, detectors

  which are supported by the cover 19 of the

  container in which they pass tightly thanks

  at the joint 21. The detectors 57, the longest, plungers

  in the liquid contactor 23 even when the recipe

  it is horizontal. They are all connected to the negative pole 13. The immersion detectors 58, 59, 60 and

  61 of each group of two spaces in segment of

  56a and 56c or 56b and 56d respectively.

  are generally the same length two by two and are connected by a common conductor 46,

  47, 48 and 62 to a digital operating device 49

  the position state of the container abbreviated in the following by "operating device" and disposed within 52 of the box space 53 of

  so that they can send him signals.

  Drivers 46, 47, 48 and 62 are presented under

  printed circuit board on the upper side of the neck.

circle 63.

  When the vehicle is parked, level 24 of the

  conductive liquid 23 of the container 14 takes a positive

  plan and unity which is noted when the

  throws the installation by the immersion detectors 57 to 61. If the vehicle is then tilted and with it

  the container 14, the conductive liquid will lick from

  detectors and, after a certain period of time,

  later, the operating device 49 triggers the alarm.

  me. If on the other hand we print jerks in all

  Meaning to the vehicle, and with it to the container 14, the

  face 24 of the liquid changes it too but for

  resume after a certain time its initial position

  tial, so that the alarm is not triggered although other detectors have been licked by the conductive liquid in the meantime. In the swing movement of which we have just spoken, the movements of the conducting liquid 23 of the container 14 are slowed down and attenuated by the plunging walls 102, 103, 104 and 105,

  so that it can not be formed in the annum

  surface wave 56 running in a circle

  and likely to trigger a false alarm.

  FIG. 18 shows another example of application of the present invention, in which

  57, 58, 59 and 60 are arranged in two rows.

  perpendicularly in a cylindrical container 14 subdivided by plunging walls intersecting at right angles 102, 103, 104 and 105 in four housings

  in the form of a cylindrical sector 106, 107, 108 and 109.

  The bottom 16 of the container 14 may take the form of a spherical cap. The immersion detectors 57 connected to the negative pole 13 are in this case approximately in the middle of the container and reach almost the bottom,

  which makes them soak for any position of

  Cultivation of the container in the conductive liquid. The detectors of the groups 58, 59 and 60 are of different length and are, in each group, interconnected by a common conductor and connected to the operating device 49. In this way they define switching planes at different heights in the container 14. , plans that can be achieved by the

  conductive liquid in the container in case of inclination

  sound of the vehicle. The plunging walls 102 to 105 brake and damp in this case the movements of the

surface of the liquid.

  In the application examples described above and using the immersion of plunging detectors, as electrical contactors, the plunging detectors can also be replaced by rings or

  contact segments as for example in Figure 3.

  But as we said, the use of detectors

  plungers is particularly advantageous.

Claims (23)

  1 - Anti-theft security for motor vehicles, in particular for motor vehicles with an electrically operated alarm system and an alarm triggered by a switching device connected to the vehicle, characterized in that the switching device (iO) has electrical contacts (17, 19;   43, 44, 45; 55, 57, 58, 59, 60, 61) automatically closing   the current circuit (11) for actuating the   alarm system when the vehicle takes a posi- slanted.   2 - Anti-theft security according to claim 1,   characterized by the fact that the switching device   tion (10) is designed as a pre-liquid switch   feeling a partially filled container chamber   a contactor liquid (23) which is electrically conductive co-operating with contacts.   3 - Anti-theft security according to claim 2,   characterized in that provision is made in the   of the bottom (16) and in the upper part (42) of the chamber of the container, electrical contacts (17, 43, 44, 45) isolated from each other and   connected to opposite poles of the electrical circuit cradle (11) of the alarm system.   4 - Anti-theft security according to one of the claims   1 to 3, characterized in that the container (14) has a peripheral wall (15) of non-electrically conductive material and a bottom plate (17)   in electrically conductive material.   - Anti-theft security according to one of the claims   1 to 4, characterized in that disposed on the peripheral wall (15) of the container (14) a plurality of contact rings (43, 44, 45) spaced from each other and spaced from the part (17) conducting the bottom (16) and which are connected to an operating device   (49) triggering the alarm in the event of   of the inclination of the container (14) observed at the level of the contact rings during the setting vigilance of the alarm system.   6 - Anti-theft security according to one of the claims   1 to 5, characterized in that the container (14) of the switching device (10) is constituted by a plastic container which can be fixed and maintained in   vertical position on the vehicle when the vehicle is   launches alarm system, container that is closed to   its upper part (20) by a cover (19).   7 - anti-theft security according to claim 6, characterized in that the cover (19) is in   metal and that an isolated conductor (18) moving to the   inside through the cover (19) is connected to   a bottom metal plate (17) of the container.   8 - Anti-theft security according to one of the claims   2-7, characterized in that the peripheral wall   (15) of the container (14) has a surface area   (25) of such a nature that it can not be wet   by the conductive liquid (23).   9 - Anti-theft security according to one or more of the   Claims 2 to 8, characterized in that   the conductive liquid (23) is constituted by triphenol   nylfluoromethane, triphenylchloromethane or a carrier liquid supplemented with a metal salt, preferably copper sulfate, in particular ia   glycerin or other organic compound.   - Anti-theft security according to one or more of   claims 2 to 9, characterized in that the   electrical contacts are constituted by detectors   immersion (55, 57, 58, 59, 60, 61) plunging di-   depths in the container chamber.   11 - Anti-theft security according to claim 10, characterized in that it is provided, for each of the heights to be verified in the container (14) at least three dipping detectors immersion (58a, b, c; 59a, b , c; 60a, b, c; 61a, bc) which are connected by   a common conductor (46, 47, 48) to the expander device ploitation (49).   12 - anti-theft security according to claim 11, characterized in that the dip immersion detectors (58 to 60) are distributed on radial radii (75 to 81) starting from the central axis of the container (14).   13 - Anti-theft security according to claims 10   or 11, characterized in that the negative pole (13) of the switching device (10) is also connected to at least one dipping immersion detector (57) arriving near the bottom (16) of the container (14).   14 - Anti-theft security according to one of the claims   10 to 13, characterized by the fact that at least   immersion immersion detectors (58 to 61)   linked by common drivers (46, 47, 48, 62) to   operating device (.49) are available to   (58a, b, c to 61a, b, c) triangles substantially   equilateral in the container (14).   - Anti-theft security according to one of the claims   10 to 14, characterized by the fact that all   plunging immersion detectors (57 to 61) are   placed near the inner peripheral surface   (25) of the peripheral wall (15) of the container (14).   16 - Anti-theft security according to one of the claims   2 to 15, characterized in that the container chamber (56) receiving the conductive liquid (23) is annular in shape and the immersion dipping detectors (55, 57 to 61) are placed in the chamber. of annular container.   17 - anti-theft security according to claim 16, characterized in that the annular container chamber (14) receives in its interior space (52) delimited by the annular container chamber (56)   the electronic operating device (49).   18 - Anti-theft security according to claims 16   or 17, characterized in that the dip immersion detectors (55 to 61) are distributed over the   around the annular container chamber (56).   19 - Anti-theft security according to one of the claims   10 to 18, characterized in that the detections   plungers (S) arranged on two opposite sides   axis (82 and 83) along two directions   perpendicularly (F and R) are grouped into two groups (L and Q respectively) and that the detectors   (SQ) of one of the groups (Q) are independently connected   detectors (SL) from the other group (L) to operating device (49).   20 - Anti-theft security according to claim 19, characterized in that the detectors (SL) of one of the groups (L) are assigned to the direction of travel or longitudinal (F) and detectors (SQ) of the other group (Q) in the transverse sense (RI of the car.   21 - Anti-theft security according to the claims   19 or 20, characterized in that the differences in length (/ L1) of the detectors (SQ) are assigned to the transverse direction are greater than   that (L. \ q) of those (SL) who are assigned to the   longitudinal rection (F) of the vehicle.   22 - Anti-theft security according to one or more   Claims 2 to 21, characterized by the fact   that the container chamber receiving the liquid   conductor (23) is subdivided by walls (102, 103, 104, 105) into a plurality of connected partial chambers between them by the liquid.   23 - anti-theft security according to claim 22, characterized in that the walls are conques as plunging walls (102, 103, 104, 105) se   ending at a certain distance from the bottom (16) of the container (14).   24 - anti-theft security according to claim 23 characterized in that the plunging walls (102 to 105) go to the lid (19) of the container (14).   - Anti-theft security according to one of the claims   22 to 24, characterized in that the dipping walls (102 to 105) are arranged to subdivide the annular container chamber.   (56) in several chambers in the form of segments.   26 - Anti-theft security according to one of the claims   22 to 25, characterized in that the plunging walls (102 to 105) form an angle between them. about 90.   27 - Anti-theft security according to one of the claims   22 to 26, characterized in that four dipping walls (102 to 105) arranged obliquely to the direction of travel are provided (F). in the container (14).