DE2015851A1 - Electronic security device against theft for motor vehicles and as a security lock in general - Google Patents

Description

DR. CKAUS-RRINLANDER
DIPL.-INiG. KLAUS BERNHARDT

D-8 MONKS 40 BXCKERSTRASSIi

208/1

MAEZEIECTRONIOS S / nc
di Luciano & Nicola
Via Rivoira, 2
Hanta (Cuneo, Italy)

Security device against theft for motor vehicles and as a security lock in general

Priority: April 2, 1969 Italy 51269-A / 69

The invention relates to an electronic device, which is designed as a security lock for motor vehicles that cannot be opened by unauthorized persons and / or in general for doors, safes, drawers or the like.

The main feature of the device according to the invention is that it has an electronic circuit which contains two connected main parts, one of which is permanently attached to the motor vehicle or below a door leaf or a movable, lockable wall and the other is movable and detachable, as a key or control member arranged 1st, cooperates with the first and can press it so that the closing and opening of the controllable or closeable part or parts with simultaneous

ΟΟΜΛΐ / .mi. ■

Closing or interrupting the electrical warning signal circuit connected to these parts is made possible.

Another feature of the device according to the invention is that the fixed part of the same has the following components contains, namely an analyzer circuit consisting of three logic circuits consists of a logic interconnection, which is generated by the signals coming from the analyzer hold can be operated, an executive output stage, which is connected to the aforementioned circuits and the operation or the deactivation of warning means or of electrical or electromechanical means for controlling work organs in general, and a lock with a keyhole, which has internal electrical contacts and is provided for receiving the aforementioned key, which has a movable, Includes removable circuit stage.

Another feature of the device according to the invention is that, when it is set for actuation, it generally masters the opening of the doors and containers and cooperates with special acoustic and / or visual warning means which are suitable for each attempted

Break-in or any introduction of an unsuitable key into the lock or when opening, lifting or removing automatically closing doors, car doors, safe wings, Engine or luggage compartment lids of motor vehicles to the extent that these are in a suitable manner with the fixed circuit of the device according to the invention are connected.

Sin further feature of the device of the invention consists in the construction of the removable, serving as a key circuit stage that is substantially similar dimensions as a normal key and a plurality of electrical bridges has the predetermined, prepared from a large number of possible Celts selected Kurzschlußkoiibinationen, wherein

009848/0101

only one of these combinations with a corresponding, electrical lock can work together, which with in the fixed circuit part accordingly arranged electrical end contacts is provided.

Further features of the device according to the invention emerge more clearly from the following description, which refers to the drawing in which are

Pig. 1 is a greatly enlarged plan view of a preferred flat, sheet-like embodiment of the removable circuit part,

Pig. 2 shows a section through a lock for the key according to FIG Pig. 1 along one to the insertion gap of the key parallel running diameter plane,

Pig. 3 is a view of a separate key part and FIG

Pig. 4 is a circuit diagram of a preferred embodiment of the electronic device, the mode of operation of which is illustrated by the key according to Pig. 1 in conjunction with the lock according to Pig. 2 is controlled.

The key (Pig. 2) in the Pail shown as an example consists of a diamond-shaped key made of electrically insulating material that serves as a load-bearing rope mechanical strength. On one of the side surfaces of his flattened key bit there are electrical contacts 32 to 38 in any number (but at least two) provided by Dark hatched, conductive bridges are short-circuited with a similarly designed contact 31. Besides, is still a contact piece 39 is provided, which is in each Pail of the other is electrically isolated.

The number of achievable with one type of key Combinations depend on the number of contacts 32 to 38 and their short-circuit arrangement.

The total number of combinations in each key of this type by changing the short-circuit arrangement of the contacts, what

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Bich can be easily achieved starting from a printed circuit, the exponentiation of the number 2 with the number η of the contacts (the contacts 31, 39 excluded) and the subtraction of 2, ^{i.e.: 2 n} - 2 = number of key combinations that differ from one another . By changing the position of contact 31 with respect to the other contacts, the aforementioned possible combinations are multiplied by the number of possible positions of contact 31, so that the number of different combinations and thus the number of possible combinations! different key becomes extraordinarily high.

The slot-shaped keyhole int lock (Fig. 2) has a series of electrical end contacts 1 «2, 3. · 10, which are against each other isolated and provided with inwardly extended sheet metal projections 1a, 2a, ... 10a, which are thus in the Project cavity 41, which receives the bit 22 of the key 20. The individual projections 1a to 10a form the same number electrical contacts which interact with the contacts 31 · 32 ... 39 of the key bit 22 by sliding contact can. The bit 22 of the key 20 has a recess 40 towards the end, while the end of the keyhole with a resilient blade part 42 is provided, which offers a moderate resistance to the complete insertion of the key. The key bit 22 can essentially assume two positions when the key is inserted into the cavity 41, and the first position, in which the end 39a of the key stops in the area of the spring 42, and the second position in which the end 39a against the base 9b of the key cavity Overwinding the resistance of the spring 42 abuts.

The key is thus in the cavity 41 without any Rotation of the lock introduced or removed from it

009ΘΑΘ / 0101

pulled and it is only called a key because of its shape. In reality it forms a detachable part of an entire circuit combination of the circuit of the device. Accordingly, the lock 41, which is to receive the key, is not an actual lock either, but only has the task of completing the analyzer circuit, which is described below, by combining it with the contacts of the bit 22 of the key 20, attached to the point of use, it is only accessible through the slot 41.

The analyzer circuit of the device (Fig. 4) has a Grounded end piece F and an end piece H connected to the power source, e.g. at the pole of an accumulator battery installed in the vehicle, the other pole of which is also grounded. The analyzer circuit comprises three logic ones Circuits that provide outputs of type 0 and 1, in the example given, a security lock against theft for motor vehicles, for example:.

+ 0.5 V and + 12 V. towards Hasse.

The contact pieces labeled 1, 2, 3 ... 10 are conductively connected to the end contacts of the Schloeeee (Flg. 2), which have the same reference numerals. The end contact G is connected to the ignition coil of the engine. The end pieces I .sind bsw with the clamps of the acoustic warning device. devices connected. The end piece L is connected to the pressure vessels, which close the warning circuit, disconnect one of the car doors or the lid of the engine or the Gepttckreumee is opened. An additional warning input is designated with E, which can be connected down to the old protective device. With D1, D2 _t S3 ·. · D12, the diodes are designated, the device shown in Gesamtechaltung the aio example be applied "with R1, R2, R3 are polarization resistors designated. A relay is designated with RH, which drain or open the £

00984870101

the warning circuit operated. With RL2 a relay is referred to, which actuates the closing or opening of the Strooepelsungs circuit of the device.

As I said in the introduction, the analyzer circuit consists of three logic circuits (Pig. 4), the three Use transistors Tr1, Tr2, Tr3, the outputs of which correspond to the A, B and C respectively correspond to the ladders marked.

The first logic circuit Tr1 changes its value on each time one or more inputs 2 to 8 are shorted to ground Output A from "O" to "1". Therefore, if the key bit 22 of the key 20 is inserted into the keyhole 41, each contact of the same is transmitted to the input of the circuit Tr1 which supplies the phrase "key inserted". The second logical circuit Tr2 ensures that the keys 20, 22 provided by the circuit combination Contacts 6, 7, 8 (none excluded) can be short-circuited to ground.

The third logic circuit Tr3 is intended to check that £ the contacts excluded by the circuit combination, in the present Pail 2, 3t 4t 5 (so not even one), be short-circuited to ground.

With the correct combination by introduction to 41 (Fig. 2) of the corresponding key 20, 22 is obtained at the outputs AaTrI3 B = Tr2, C »Tr3 values, the following breakdown to have:

A - 1 signal available, B * 1 signal available, 0 * 0 no signal.

This encryption is transferred to the analyzer maintenance, which consists of the transistors Tr4, Tr5, Tr6, the following

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dimensions are connected. The output of A excites the base of Tr4, which has the warning relay RLI as collector load. In this state, provided that the inserted key is the correct one, the output in B becomes "1" so that Tr5 is energized. But since the collector of Tr5 is connected to the output A, the output signal becomes ⁿ 0 ⁿ . Since the RLI is not energized, it does not close the warning posture and vice versa.

The C output, since it is "0", "does not influence the transistors Tr4 and Tr5 in the normal state. However, if the circuit combination produced by the key 20, 22 is _{incorrect," 1 "can be present at C f,} which excites Tr6 and its collector, the bit that is connected to output B, delete "I" and change to "Ο ¹¹ . In this state TrS '* -— i does not prevent output A from energizing RL1, which flows the warning circuit 3 ©!

Similarly, if not all contacts 6, 7, β to Hasse are short-circuited, the Tr5 äae üsssgea ws bit will not prevent and the W & rakreiee® ® will close.

The voltage at the collector Tr4 is transferred to the base Ür7, as a changer for the Selheth & ltung of the Alararelaie RL1 serves. In the case of a momentary excitation of Tr4 namely Tr7 for the fact that a second «permanent signal" 1 "in the base of Tr4, is restored. Therefore that can Warning relay RLI, which is always ready for the power supply, once aroused, just by introducing dee Key again with the correct gap combination »· be latched.

The output B is called through the capacitor M and the pair « diodes D10, D11 used to set the state of the flip-flop trip to change, which consists of the translators Tr8 and Tr9 and

the switching on and off of the gate direction. In J «dem In this case, output B delivers a signal of a different kind than that

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coming from A, which excites the warning relay RH and therefore is suitable for this purpose.

The gate direction must namely be switched on or off without the warning relay Rl1 being energized, and vice versa. Another important factor is the fact that the flip-flop circuit only changes its state for step signals that change from "0" to "1". This allows the device to be switched on, since it is switched off when the control is withdrawn. If the key is withdrawn after switching on the device, a voltage level occurs in B when leaving the sliding contact 1, which changes from "1" to ¹¹ O "and is therefore unable to change the state of the flip-flop circuit Insertion of the key when the device is already switched on, it is switched off first (signal at B from "O ¹¹ to" 1 "and then transition from" .1 "to" 0 "as a result of the switching off of the power supply by RL2). Since the contacts 9 and 10 are then short-circuited, the voltage from B changes again from "0" to "1" and the flip-flop circuit changes its state again. Thus, RL2 is energized and the device is continuously energized.

The circuit Tr8, Tr9 that forms the flip-flop circuit is calculated to have a preferred state in which the relay RI2 which operates the switch 47 is inactive. The switch 47 », which is connected in parallel with the contacts 9, 10, interrupts when it is open, when the RL2 is inactive Power supply for the entire device and thus prevents it from being switched on, even if only the contacts 9, 10 are short-circuited will.

From what has been said so far it can be seen that the inventive Security device against theft only controlled by

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i.e. can be switched on as well as off «that the correct key 20, 22 inserted into the slot 41 will. If according to Flg. 2 and 4 the key 20, 22 completely Inserted into the slot 41 and then removed again, the contacts are according to the dash-dotted lines 43, 44t 45 closed, so that the relay RI2 the circuit to Supply of the entire system closes. In this state, the safety device according to the invention is against Theft set to advance warning. If now an Alscher Key is inserted into the slot 41 or one or more of the switches connected to the line L are closed, the one controlled by the relay RL1 closes Switches and the warning devices connected to the I-lines come into action.

From the above it is clear that the key 20, 22 _c in S itself may not rotate Hloss 41 still can and that therefore the switch-almost equal 1st as the Aueschaltvorgang, well the Schlüssele 20, assume this just no turning movements 22nd Among other things, to design these two processes differently, the key is old in the recess 40. When the key is inserted into the sole seat 41, the end 39a of the key bit 22 hits the curved leaf spring 42. The process ends and. if the key is then withdrawn, the short circuit between the contacts 9, 10 is avoided, the relay RL2 is therefore released and the switch 43 is opened. In this state, there is no power supply for the entire device. If, on the other hand, the key is pushed in to the end, the relay RL2 closes the switch 47 and when the key is removed, the device remains set to the prewarning.

It is now assumed that one does not know whether the security device against theft is on or off

0011 * 1/0101

- ίο *

is switched. If you want to switch it on, you insert the key all the way in and remove it again. Was the device previously switched on, then it was when it reached the stop of the end 39a against the Spring 42 switched off, but after overcoming de * resilient The Torrich switched on again. If you want to switch it off, the gate gear is as follows when it is switched on. It It is sufficient to insert the key partially, i.e. only up to the spring stop 42. If the gate direction was already switched off, then nothing at all happens. In every case of doubt it is sufficient to assume that eich the direction of the gate is in the opposite state to that which one wishes to set.

From the above-described mode of operation of the gate direction according to the invention it can be seen that only the specific Key, which has the intended switching combination, is able to use the safety device according to the invention to control against screen theft while using any other type of key or means not just switching off the gate direction does not allow, but, as far as the inserted piece the Eontakt 31 in the correct key brings the position provided for this purpose, the warning circuit is switched on immediately.

When making the various combinations for the individual key, it is therefore advisable to use contact 31 Btets to be provided in the same position. Every Tersuofc, Switching off the security device against theft by any conductive means will end the warning circuit Switch on as soon as any contact in the sole of the 41 comes into short circuit with the aforementioned contact 31, with the exception of the

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Contacts 9 and 10. Even cutting off the conductors connecting the lock to the analyzer circuit will remain uneventful. On the other hand, it is possible that an accidental short-circuit is produced which can trigger the activation of the warning circuit. Signals "I ¹ * can obviously be applied to output A by directional diodes. Such warning signs can be generated by special Pallen push buttons or by any suitable gate direction, in order to prevent any possible misuse of the analyzer circuit. As already mentioned," is the embodiment described for the automotive industry as a security device against theft, especially for passenger cars; = of course not restrictive, because the same device: far of course after appropriate changes (operating voltage, polarity, etc.) can be used advantageously in any area where an unauthorized person cannot opening lock, as is required in particular with t-eldsebiräaken.Su for this purpose there is also the possibility of preventing the finding of the right combination for switching off the gate direction, if one analyzes it with an apparatus that could be called an electronic lockpick. It is enough That is, to separate the contacts (fig, 4}, which are connected to the diode D4, by means of directional diodes, which are connected like D1, D2, ₉ D3, and additionally to attach polarization resistors Rt. In this way, all the contacts of the combination in the lock 41 made electrically equal, making their identification impossible. _. ■ '

In Fig. 3, a leaflet 46 is shown, which in the longitudinal direction wedged in the middle of the sole mustache 22 to hide the circuit, i.e. the arrangement of the bridges between the opposing contacts. That

0 9 8 4 8/0101 bad original

Leaflet 46 is thus wedged and attached to the printed Circuit glued on, which carries the key bit 22, so that the removal of the glued-on leaflet also removes it of the circuit part covered by this would be brought about by the person who temporarily came into possession of the Key arrives, would not have the opportunity to make a copy, for which only the manufacturer of the original key is able to do so if the identification number of the key is disclosed.

Although the key or the detachable holding part of the The device according to the invention cannot nor has to perform a rotary movement for controlling the device in the part described, it is possible to use this key as a starting key for the motor vehicle engine. That is enough it to provide the motor vehicle with a suitable key switch in which the same security key by an additional movement either in the direction of further penetration into the lock or in the direction of rotation Closing the starter switch causes.

As already mentioned, the device according to the invention can open and close bolts and locks with electrical impulses work, if a suitable relay RL2 is installed, which with the sufficient number of Contacts is provided. By the invention, easily Locks controlled by the device to be manufactured cannot be opened by unauthorized persons and have an effective warning system Mistake.

An important advantage when using the invention The device lies in the fact that a person is able to use a single key or detachable holding part, to operate the same electric locks and warning devices installed in different places, so the cars that

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Apartment door, the office doors, the safe, the writing » table drawer, etc., so that the numerous keys that normally needed can be replaced by a single one.

The subject matter of the invention is not limited to what has been described and illustrated here, e.g. It may be necessary to replace the relays with static devices, especially when the device is used in explosive environment where such devices would have to work with controlled transistors or diodes. Sine The circuit can be simplified by replacing the Bring the flip-flop circuit through a pass relay, although this measure affects the space required and the manufacturing costs the device would have an adverse effect.

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Claims (1)

208/1 Claims MJ Electronic security device against theft for motor vehicles and as a security lock in general, characterized in that it consists of two parts, of where a fixed circuit part is mounted on the secured motor vehicle and with the motor vehicle battery is conductively connected or on doors, shutters, safe wings and on movable ones! Parts is attached that a detachable Circuit part is carried by a key, the fixed circuit part electrical, with the Lock has connected end pieces »which are connected to a plurality of contact organs, which a certain Have an arrangement and can come into conductive contact with the corresponding contact organs »that are on the key bit, and that the keyhole that is to receive the key consists of a block with electrical end pieces and a slot is provided for receiving the key bit, this key being able to have two positions of the Take longitudinal feed inside and opposite the lock, one of which is the electrical switch-off position of the device and the other corresponds to the power-up thereof while the device is in the power-up state is able to use electroacoustic and / or luminous warning states to activate an electro-mechanical lock bring about controlled closing means. 009848/0101 1s 2 "<device according to claim 1, characterized in that its fixed circuit part at least three contiguous Contains X transistor stages, namely an analyzer stage, a to be actuated by the signals emanating from the analyzer stage Intermediate stage and a final stage with matching electronic, electrical and electro-mechanical devices -is mistaken, the warning organs and the eventual existing mechanical locking elements, which are controlled by the device, switch on or off. 3. Door direction according to claim 1, characterized in that the third stage is provided with an output relay that switches the circuit that feeds the warning devices, directly controls, with the middle transistor stage, which controls the working output stage, is able to enter a state of an electrical advance warning when the Key or the removable circuit part pulled out of the lock is, and can only be switched off by the fact that the key is completely inserted into the lock slot, which Key is provided with the appropriate circuit combination for which the device is intended. 4 · Device according to claim 1, characterized in that the key or the removable circuit part is an element is made of an electrically insulating material that has a large number of electrical contacts on its key bit, which can be short-circuited after a certain combination that makes up a single electronic device can control that in a matching manner with the electrical end pieces is conductively connected in the corresponding lock. 5. Device according to claims ΐ and 4, characterized in that that the removable circuit part or key of the device has a flat-shaped introductory key bit having. Q09848 / 0101 ORIGlNAL BATHROOM -I - 6. Device according to claims 1, 4 and 5 »thereby marked that the attached to the key hard Circuit part is covered so that it is invisible, wherein the cover plate is not removable to to prevent replication of the key. 7. Device according to claims 1,4,5 and 6, characterized in that the attached as a printed circuit on the key bit circuit part has a plurality of arbitrarily arranged and short-circuited contacts in the manufacture of the key and the corresponding lock, this arrangement in the It is possible to provide a number of different combinations which is equal to 2 ⁿ -2, where η represents the number of different positions which the contacts provided on the key bit can assume. 8. Device according to claims 1 and 4, characterized in that that the removable circuit part, which is built into the key, has five short-circuited contacts that work with as many contacts in the lock as well as with an indefinite number of electrically isolated ones Contact pieces. 9. The device according to claim 1, characterized in that the removable circuit part or key is neither rotatable is still making some angular movement. 10. The device according to claim 1, characterized in that the removable circuit part in addition to the longitudinal movement of the Introduction to the lock also performs a rotary motion. 11. Device according to claims 1 and 10, characterized in that that the key can be rotated in an angular movement if the bowl is also used as a starting sole for a motor vehicle is used. 009848/0101 12. Device according to claims 1, 10 and 11, characterized characterized in that the key executes a further longitudinal feed instead of a rotary movement »during which it is already at the end of its stroke in the lock, this additional feed only the temporary closing of the Starter motor switch trips while the introduction of the key into the starter lock controls the operation of the safety device. 9848/0101