ELECTRONIC STEALING IMPEDIMENT DEVICE FOR CARS

Abstract: An electronic stealing impediment device for cars, having the task to guard the car against any unauthorized use and any penetration of a thief, in which case an alarm signal is effected. The logical circuit of the equipment is connected to switches of the doors, and to the starter-switch. Should the logical circuit get voltage from any of said switches, so after a delay time of 8 sec. the memory will controll a timing circuit, which in turn controls the switching circuit. The output of the switching circuit blocks the starter switch and a magnet valve being placed into the fuel pipe-line of the engine - and controls the horn additionally. If said timing period is over, the horn signal stops, but being the memory not in its ground position in case of a repeated door opening or start-step, a repeated alarm and blocking is getting effective. Should the thief during the alarm-time not switch off the starter and should he start the motor after said period has passed the motor will start. If the rotation number of the motor achieves a predetermined value,so this fact will be sensed by a frequency sensing circuit being connected with the breaking contact of the motor, so the timing circuit gets a control signal, thereby effecting the alarm and blocking steps again. The replacing step if the device into the ground position with closed doors and with switched off starter, a sensing means - being placed secretly into the car can be excited e.g. a reed relay, generated by a permanent magnet, and the starter should be switched on again. The owner of the car has adequate time having the doors of the car opened, resp. starting the motor to get the sensing means uneffective by its excitation.

Description: ELECTRONIC STEALING IMPED ffilT DEVICE FOR CARS The subject matter of the invention is an electronic stealing impediment device for cars, having the task to guard the car continuously after the installation of the device into the car against any unauthorized use. Beside said function, the device according to the invention can make alarm which is getting effective, if any unauthorized person will open the door of the car or its luggage space resp. the engine housing. * Several types of car-guar ing-systems-alarm and impediment protection devices known in the art, the common feature of which is that if any unautozrized person will open the doors or moves the car, the device gets immediately effective * The essence of the manner of his operation is that the alarm is effected by the horn or the braking of the current for the motor, resp. the fuel supply gets broken. A common crawback of said devices belonging to the known solution is that, when the car is left and the protection device is swiched on, any kind of an operation organ /e.g. a switch/ is to be switched on. This fact is of a very disadvantageous feature because the operation of such kind of switching organ can be observed by the thief. A further common feature of said devices is, that the thief, if he tries to start the engine and the alarm gets effective or the motor does not start, he perceives immediately that an impediment device is mounted into the car. This fact is for a well trained thief an easily eliminatable pullback. The most types of said impediment devices known in the art are powered from the battery of the car which means that in case if the impediment device is set into operation for a longer time, the battery gets discharged, resp. the battery can get spoiled. The aim of the invention is an electronic stealing impediment device for cars, having the following features: - The device according to the invention guardes the car continuously from the moment of its installation into the car. - The operation can be delayed, having the task to mislead the thief and on the other hand offer for the owner of the car adequate time to make the device uneffective, when he wants to use his car. - Should any unauthorized person penetrate into the car /no alarm comes into being/ the horn gets actived after the doors have been opened within 6-8 sec. and the motor gets blocked. - The alarm starts immediately after the hood has been opened resp. the luggage space of the car • - Should the thief penetrate into the car without opening the door the alarm of the horn and the blocking of the engine start after a delay of 6-8 sec. - In the case of a repeated penetration or starting initiation the alarm and the blocking program start again. The alarm of the horn gets effective within a predeter¬ mined period /e.g. 1 min./ for sake of saveing the battery. - The device can be readjusted into the ground position only by energisation of a sensing means being placed aecretly /hidden/. - The selfenergy-consumption of the device is neglectable. - The above mentioned aims of the invention are sold on the following way: Basically the device consists of an electronic circuit " , being connected to doors, luggage-spaces, hood's swiches, disposes of logical means, memory means, pulse-frequency sensing means, timeing and switching means. The output contact of the switching circuits is connected to the breaking /hammer/ contact of the motor, the electronic starter to a magnet-valve being placed into the fuel pipe of the motor and finally to the original or a suplementary horn. Should the logical circuite not receive any initiation- -signal within a predetermined ' period after the door of the car got opened and the motor was started, the switching circuit is getting active /the alarm operates immediately after the hood the luggage space resp. their openings get opened/. This state can be seased only by energization of a special sensing means being placed secretly into the car, when the start-switch is put off and the doors are closed, and if the motor is started after said energization-sensing means is energized. The subject matter of the invention will be described taking an embodyment of the invention on the basis of the attached drawings. Pig, 1 represents a block-diagram of an embodyment, Eig. 2 is an electronic circuite-diagram being realized. Regarding Eig. 1 it can be seen, that the imput 1 is connected to the battery, the input 8 is coupled to the switch-sensing the opened state of the doors. The input 2 is connected to the starter-switch, the input 3 is connected to the switch of any consuming means of the car /radio, ventillator/. The input 4 is connected to the secretly placed sensing means within a predetermined time period of delay said sensing means can be energized, in consequence of which said sensing means can made OMPI ^^NATIO^ unactive. Passing said time a signal can be given in consequence of which the device can be set into the ground position. The input 9 is connected to the switch for opening the hood and the luggage space resp. their openings * The logical circuite L controlls the timing circuit I and the switching circuit K through the memory M . The switching circuit K disposes of three outputs: the breaking contact /electronic starting/ 5a» the blocking output, the output of the operation of the horn 6a and the switch of the magnet valve 7a. The breaking contact is connected to the timing circuit I through a pulse-sensing circuit N. The logical circuit, L gets a constant battery voltage through the input 1. On the input 2 appears in the moment of the start the same bettery voltage. Should no inactivation signal get within a preder ined time onto the input 3, or onto the input 4j the secretly mounted sensing means gets no activation, consequently the logical circuit J will controll the memory M • The same process takes place if the door-switch connected to the input 8 is getting active. Should the logical circuit L be controlled by one of the inputs 2 or 8, the memory M controlls the timing circuit I , which in turn, controlls the switching circuit K for nearly 1 minute time. The switching circuit K disposes of three independent outputs for the operation of the horn, the magnet valve and further the starting will be blocked. This condition can be seased through the input 4, generating the sensing means when the doors are in a closed condition and the starting switch is a switched off position, and the starting switch is switched on again. After the one minute operation time of the switching circuit K , the device remains again in its alarm position. Should the thief leave the start switch in a switched on position, and should the motor get st'arted anyhow after the blocking OMPI time /e.g. pushing the car/ so, the pulses coming from the breaking contact to the pulse frequency sensing circuite H , above a predetermined rotation number of the motor /e.g. 1000/min./, the timing circuite gets controlled, consequently circuit K getting set into operation will start the blocking and the alarm steps again, Eig. 2 shows a circuite diagram being already realised. After the starting the battery voltage gets through the diode Dg, in case of opening the door through the resistors R.-R,-, through the capacitor Cg, transistor T , diode D and from the common contact of the diodes DQ and Dg through the capacitor C p , resistor R , diode D^ and capacitor C* ι y » in form of a pulse onto the input B of a bistabil multivibrator B-C. In consequence of said pulse the output of the bistabil multivibrator, being composed of a gate circuits B-C brings one of the inputs of the . gate circuite D onto ' a high level. The other input of the gate circuite D gets a steadily encreasing voltage from the divider R g -C^. Should the high logical level achieved thereby, so the bistabil multivibrator being composed of the gate circuits C-D tiltes over and the gate circuit A gets closed. Thereafter further signals coming from one of the inputs 3 or 4 are inactive. The mentioned delay time is the very time being needed for this process, after which the alarm and the blocking operation get active. Should within the delay time an inactivation signal appear on one of the inputs 3 or 4, the transistor T, gets a controll in its opening direction through the resistor Rng*. capacitor Cg, resistor R-,g and the bistabil multivibrator B-C tiltes over through the gates. This results a resting condition of the equipment, securing an undisturbed operation of the motor. .After an alarm and blocking the device can be brought into its basic position before the said one minute has passed, the reed relay V will be energized with closed doors of the car and switched off starting, consequently the bistabil multivibrator C-D and bistabil multivibrator B-C tilte over into their ground position as well, whereby the output of the gate circuite D gets on a high level. Should the starting step be repeated, both of the inputs of the gate circuite E get onto a high level, so its output will be on a low level, and the gate circuite G will be closed. Due to this closed position, the exitation of the relay J will be ceased, consequently the blocking will be lifted, and the horn alarm stops. In order to prevent the discharge of the battery of the car due to the alarm, the task of the timing circuite is to switch off the operation of the horn after a time of 1 minute has passed. The timing circuite is composed of monostabil multivibrator, built of the gate circuites E-C, of the capacitor C, ., of the resistor R - 1 ' of " ^e - resistor R ? » of the diode D-, -, and the resistor R ■^ ie time constant of secure a high level on the output on the gate G after said 1 min. tiiαe has passed, whereby the transistors T-j-T. are getting a controll; said transistors T,-T. will be blocked and the relay J gets released. The alarm and the blocking come into being by the tilting of the monostabil multivibrator Eg because it is the operation organ of the switching circuit , having the task to pull on the relay J. The pulling step of the relay J comes active under the following preconditions: - After the delay time has passed, the bistabil multi- vibrator of the memory CD gets tilted, the output of the gate circuit D gets onto a high level,and controlls the monostabil multivibrator E-G through the capacitor C lg , the resistor 22 and diode 12 . - Should a low level voltage be given onto the input 9 by opening of the hood and the luggage space, so the multivibrator F-G gets a controll signal through the capacitor C. , ., , the resistor R o* ^ iιe ca P ac i 'fcor ^ 2 an<i resistor R 2 , - " When the timing has expired and no ground position has taken place, the battery voltage appears on the common contacts of the diodes B ~Bq ^ Λιe "t° a repeated starting of the opening of the doors and the battery voltage gets to one of the inputs directly to the other input through the capacitor 13 and a resistor 2r - undirectly. Consequently its output will be on a low lever, so the monostabil multivibrator E-G will start. - If the timeing is over in course of a starting step, and no replacement into the ground position has taken place, and the motor will be started thereafter, so above a predetermined motor-rotation number /e.g. 1000/min./ the pulse frequency sensing circuit , composed of the resistor ' diodes D the diod f the gate circuite E which starts the monosta l multi¬ vibrator E-G, Should the monostabil multivibrator E-G due to the above mentioned logical preconditions be tilted, the relay J will be operated by means of the transistors *^ ""* I? 4. "k** 1 *--* contact of which can be connected e.g. which the horn, the magnet-valve and with the breaking contact. The most importante advantages of the electronic stealing impediment device for cars according to our invention are the followings: - Ηo handling means is neaded. One cannot forget to switch on or off such organ, so it cannot be observed how the stealing impediment device is operating. - With the installation of the device the original electric circuite should not be modified, the device is connected some of the contacts and it is operating continuously. - The device gets active with a certain delay of time, thereby surprising the thief and secures for the owner adequate time to get the device inactive. - The inactivation is carried out by energization of a reed relay being placed secretly^ - the same secretly mounted reed relay serves for replaceing the device into the ground position. - After alarm gets start, it stops within one minute, consequently the alarm does not require more energy consumption of the battery * - In case of a repeated penetration of the thief, or a repeated start, the alarm program gets effective automatically again. - The device according to the invention can not be , ineffectived by any unautohorized person, because the the variation of the placeing possibility of the reed relay is endless. - Should the thief know about the possibility, that the device cannot brought into its ground position by the use of any magnet, he is not able to find the exact place of the reed relay, because the excitation of a reed relay can be effected only in case if the starting switch is in its "on" position and the doors are closed. - The horn alarm and the blocking effect of the motor can be seased by the excitation of the reed relay if the starting process is repeated, consequently the tief has absolutely no information about the secrete placeing of the reed relay. - Should the thif wait the end of the alarm time and the motor be started only if this alarm time is over, the motor cannot be started, but should the rotation number of 1000/min., said rotation number excites the alarm and blocking step again * pypi

Claims: ClaimB : 1, Electronic stealing impediment device for cars, to guard the car making alarm if needed, containing switches for the doors of the car, supplied with a magnet valve, a horn, an excitation sensing means, a logical means, memory means, and switching circuites, c h a r a c t e r i z e d in that one of the inputs of the logical circuit L is connected to the battery of the car directly, an other input is connected to the switch of the doors, further inputs are connected to each of .the switches of the electro-consumming means of the car, whereby the output is connected to the switching circuit E through a memory M "and a timing circuit I ; the outputs of which are connected to the horn, and/or to the starting switch and/or to a magnet valve • being placed into the fuel pipe-line of the motor; further the memory is connected to an excitable sensing means; and further, that the input of the pulse frequency sensing circuit is coupled to the breaking contact; its output is connected to the timing circuit I • 2. Electronic stealing impediment device for cars according to claim 1, c h a r a c t e r i z e d in that a further input of the logical circuit 1 is connecte " d to the hood, resp. to the luggage space openings of the car. O./PI Vl'lpo

Inventors: KARSAI HENRIK, KARSAI, HENRIK
Applicants: IPARI MUESZERGYAR
Application year: 1983
Main classification: B60R25
IPC codes: B60R25, G08B13