FR2604961A1 - Anti-theft device for a motor vehicle, preventing it from starting if a secret code has not been entered - Google Patents

Abstract

The invention relates to a device preventing a motor vehicle from being started if the secret code has not been entered. The device includes: a spindle 1, on which there are freely mounted 3 wheels 2 and 2 wheels 2', and a casing 3. The wheels 2 are traversed, through their thickness, and at two diametrically opposed points along a radius R by a system 5 (ball-spring-ball, in a crimped tube) (made from a conducting metal). The wheels 2' are traversed, through their thickness via a tube 7 (made from a conducting metal). Tubes 10 and 10' (made from a conducting metal) are fixed on the internal lateral walls of the casing 3. The components 1, 2, 2', 3 are made from plastic and obtained by moulding. Method of operation: with the aid of the 5 wheels, numbered from 0 to 9, the driver enters the secret code. The electric current flows and excites a relay which closes the electrical circuit between the anti-theft device/starting contact system and the starter. In order to start up, there remains only to turn the key. The device according to the invention is an anti-theft device for a motor vehicle.

Description

The object of the present invention is to prohibit the starting of a motor vehicle, if a secret code has not been entered.

Other inventions exist: some are electronic but have a high cost price; others are mechanical but require a fairly long recovery time.

The device according to the invention will be of lower cost and faster handling.

A form of execution of the invention is described below by way of indication and in no way limiting, with reference to the accompanying drawings:
Figure I is a front view in section BB of the device.

Figure 2 is a top view of the device.

The fife 3 is a left view in section AA of the device.

Figure 4 is a sectional view of the system (5).

Figure 5 is a sectional view of the tube (7).

FIG. 6 represents: a front view, a top view, and a left view in section LÀ, of a wheel (2 ').

Figure 7 is a sectional view of a cover (I4).

Figure 8 is the electrical diagram showing the connection of the device.

The device object of the present invention comprises: (see fig I-2-3)
An axis (I) on which are mounted free wheels (2) and (2 ').

The assembly (I-2-2 ') is housed in a casing (3). A cover (4) closes this casing.

The wheels (2) (see fig I) are traversed, in their thickness, and at two diametrically opposite points, along a radius R, by a system (5) (see fig 4).

The wheels (2 ') (see fig 6) have, on their two flanks, 9 semi-spherical housings (I3) positioned on a radius R and 360 from one another. in their thickness and according to the seed radius R, by a tube (7) (made of conductive metal).

The casing (3) has, on each inner side wall, a groove (6) leading to a cylindrical housing (8). On these mazes walls are fixed two short tubes (10) and (10 ').

The housing (3) has four fixing holes (I2) (see fig 2).

A cover (I4) fits on each hole (I2) (see fig 7).

According to a preferred embodiment: the axis (I), the wheels (2) and (2 '), the casing (3), the cover (4), the covers (I4), are made of rigid plastic and obtained by molding.

Fixing, systems (5) in the wheels (2); tubes (7) in the wheels (2 '); tubes (10) and (10 ') in the casing (3); axis (I) in the housing (8); the cover (4) on the housing (3), is done by colîqe.

Operating mode:
To start the vehicle, you must enter a secret code (known when buying the device) using the 5 wheels numbered from O to 9. When the combination is table, the elements (10 ') (5) ( 7) are all aligned and therefore in contact: the electric current can then cross them; the relay (I6) is energized and closes the electrical circuit between the anti-theft-contact-start system and the starter. (see fig I and 8) .I1 only remains to turn the key.

With the vehicle started, the driver will have to jam the jumpsuit.

The method of fixing the device is in no way limiting, other systems may be offered.

The system (5) is composed of two balls separated by a spring, the whole placed in a tube crimped at its two ends.

 The tubes (10 ') are welded conductors which, after following a small groove (9), exit the housing (3) through a hole (11).

The wheels (2) and (2 ') have on their periphery the numbers 0 to 9, and a striated part on their large diameter.

Claims (1)

 R E V S N D 'I C Â T I O N S  10 Device which prohibits the starting of a vehicle, If a co  secret has not been composed, characterized in that it comprises:  an axis (I) on which wheels (2) and (2 ') rotate.  is mounted in a housing (3) fitted with a cover (4).  20- Device according to claim I, characterized in that the  wheels (2) (3 in number) are crossed in their thickness,  along a radius R and at two diametrically opposite points, by  a system (5).  'JO- Device according to claim 2, characterized in that the  system (5) consists of 2 balls (made of conductive metal), separate  rees by a spring (in conductive metal), all placed in  a tube (made of conductive metal) crimped at both ends.  4w- Device according to claim I, characterized in that the  wheels (2 ') (2 in number) have 9 slots on their sides  semi-spherical elements (I3) located on the same radius R and at 360  one from the other, and they are crossed in their thick  by a tube (7) (made of conductive metal), located on the same  ravon R and 360 of the holes surrounding it.  50- Device according to claim I, characterized in that the  casing (3) has, on its inner side walls, a  groove (6) leading to a cylindrical housing (8) (whose axis  is slightly below the axis of the groove) allowing the  passage of the ends of the axis (I) and the positioning of  this one.  60- Device according to claim I, characterized in that the  casing (3) has, on each interior side wall, two  diametrically opposite cylindrical housings and located on a  radius R, allowing to fix tubes (IO) and (IO ') (in metal  conductor) of short length and 8 semi-spherical housings (I3) 70- Device according to claims I and 6, characterized in  to the tubes (10 ') are welded conductors which, after having  followed by a small groove (9), exit the housing (3) by a  hole (II).  80- Device according to claims I, 2 and 4, characterized in that  that the wheels (2) and (2 ') have on their periphery the  numbers from O to 9, and a striated part on their large diameter.