Title of Invention	AN IMPROVED ANTI THEFT DEVICE FOR VEHICLES
Abstract	The application relates to an improved anti theft device for vehicles which comprises, a micro controller unit having a microprocessor chip capable of incorporating a specific software, a key board for feeding in the password, a LCD for displaying the specific information, one or more zones, a locking device and a transmitter and a Radio frequency receiver or mobile phone, which are appropriately connected to facilitate (i) activatioll or inactivation by using a numerical code, (ii) the various essential parts of the vehicle are ,electromechanically locked whenever the anti theft device is put into the active mode thereby preventing the movement of the vehicle and (iii) when a breach of security takes place, the sensors sensing the breach and sending signals to the micro controller unit which in turn, through the relay, triggers the radio frequency transmitter or mobile phone.

Title of Invention

AN IMPROVED ANTI THEFT DEVICE FOR VEHICLES

Abstract

The application relates to an improved anti theft device for vehicles which comprises, a micro controller unit having a microprocessor chip capable of incorporating a specific software, a key board for feeding in the password, a LCD for displaying the specific information, one or more zones, a locking device and a transmitter and a Radio frequency receiver or mobile phone, which are appropriately connected to facilitate (i) activatioll or inactivation by using a numerical code, (ii) the various essential parts of the vehicle are ,electromechanically locked whenever the anti theft device is put into the active mode thereby preventing the movement of the vehicle and (iii) when a breach of security takes place, the sensors sensing the breach and sending signals to the micro controller unit which in turn, through the relay, triggers the radio frequency transmitter or mobile phone.

Full Text	Field of the invention: The present invention relates to an improved anti theft device for vehicles. More particularly the invention relates to an anti theft device for land vehicles especially four wheelers such as cars. Prior art: Different types of vehicle alarm / vehicle anti theft devices are known in the art. The presently available vehicle alarm / vehicle anti theft device have the following main features: - Sensors - To sense door opening - To sense bonnet opening - On the front and rear windscreens - To sense boot opening and. - To sense vibration. Some of the known devices, in addition to the above sensors, have means to cut off Ignition. A known anti theft device is shown in fig 1 of the drawing accompanying this specification The anti theft device for vehicles which are available in the prior art comprises a micro controller unit (17) comprising a micro controller (18) , two electrolytic capacitors (19 & 20) , one of which is for supplying regulated power to the micro controller , and another timing capacitor (21) being connected to the inputs of the micro controller being connected to a plurality of resistances (22 ) through plurality of diodes (23 ), for protecting the micro controller from high or reverse voltage , the output terminals of the micro controller being connected to the base of a of bipolar transistor (24 ) the output of the bipolar transistor (24) being connected to the coil of the of a relay (25) , for driving the relay , the input of a voltage regulator being connected to the power source , the output of the voltage regulator(26) being connected to the inputs of the capacitor for supplying regulated power to the micro controller, the interactive terminals of the micro controller being connected to a radio frequency receiver (27) , the terminals of the diodes (23) being capable of being connected to sensors (28) and the output of the relay being capable of being connected to a siren (29) In the above described present day known anti theft device, it has in the vehicle a siren, which whenever, anyone tampers with the doors or bonnet of the vehicle, initiates the siren, the sound of which will draw the attention of the nearby peoples as well the owner of the vehicle only local attention. The main drawbacks of these presently available anti theft devices are the following: The sensors in the present day theft devices are placed in the doorframes. Such an arrangement does not activate the sensors when the window panes are pulled down consequently there will be no siren. Thus a person can get access to the inside portion of the vehicle and to the accessories inside without giving any alarm to the nearby people. Such an access can also facilitate opening of the bonnet, snip off the sirens power supply thereby silencing the siren. The person can use the ignition, dismantle the steering lock and drive away the vehicle as if he is the owner of the vehicle without giving any alarm for the nearby people and / or to the real owner of the vehicle. Passers by mostly view the siren hooting quizzically and if the person manages to silence the siren, the people will not notice and he can drive away the vehicle as if he is the real owner of the vehicle In addition in the present day device there is no provision for locking the wheels. Hence any body can drive / push the vehicle away without the owner noticing such a move Further since the bonnet is not locked any person can have access to various accessories and can drive away the vehicle without any bodies notice / attention If the real owner of the vehicle is not in the vicinity of the vehicle he will not be in a position to view and or to know as to what is happening to his vehicle until he comes to take the vehicle On the other hand if the owner is in a place, beyond hearing of the siren, he would not even be able to hear the siren to prevent any theft of his vehicle. Since, in the modern times, the theft of the vehicles are increasing and the cost of the vehicles have gone up steeply there is a need for an efficient anti theft device which would overcome most of the major drawbacks of the hitherto known devices Therefore, the main objective of the present invention, is to provide an improved anti theft device for vehicles, which overcomes most of the major draw backs of the hitherto known devices Still another objective of the present invention is to provide an improved anti theft device for vehicles having the various parts such as windows, doors, bonnet etc of the vehicles which are activated whenever such parts are broken or pulled down. Yet another objective of the present invention is, is to provide an improved anti theft device for vehicles which is made active or inactive by using a numerical code, which can be set and reset by the user using a code by employing a key board. Still another objective of the present invention is, to provide an improved anti theft device for vehicles, in which all the accessories such as, bonnet, boot and brake, are electromechanically locked whenever the anti theft device is put into the active mode thereby preventing the movement of the vehicle Yet another objective of the present invention is, to provide an improved anti theft device for vehicles, wherein when a breach of security takes place, the sensors senses the breach and sends the signal to the micro controller unit which in turn, through the relay, triggers the radio frequency transmitter or mobile phone The above objectives of the present invention has been achieved by developing a novel and improved anti theft device which facilitates in (i) making the device active or inactive by using a numerical code, which can be set and reset by the user using a code by employing a key board (ii) the accessories of the vehicles such as, bonnet, boot and brake etc, are electromechanically locked whenever the anti theft device is put into the active mode thereby preventing the movement of the vehicle and (iii) when a breach of security takes place , the sensors senses the breach and sends the signal to the micro controller unit which in turn, through the relay , triggers the radio frequency transmitter or mobile phone. To the best of my knowledge such an anti theft device is not hitherto known and therefore is novel. This invention will now be described with reference to the accompanying drawings, wherein; In the figs Fig 2 is a view of the improved anti theft device of the present invention. Fig 3 shows the Lay out of LCD & Key board. Fig 4 shows the view of the four-wheeler indicating the preferred embodiment where the sensors and locking device used are placed. It should be noted that though the device of the present invention has been described in relation to a four wheeler (car), similar arrangements are also applicable to other kinds of vehicles like two wheelers, three wheelers etc. and the present invention also envisages within its scope, the use of the device of the present invention to such vehicles. The main features of the anti theft device of the present invention are; 1. A micro controller unit (16) having a micro controller (1). 2. A key board (10) and a LCD for feeding in the password and displaying the information. 3. One or more zones, preferably seven zones Marked as Z. 4. A locking device (12). 5. Radio frequency transmitter such as pager or mobile phone (13). According to the present invention there is provided an improved anti theft device for vehicles which comprises a micro controller unit ( 16 ) having a micro controller (1 ), two electrolytic capacitors (2 & 15 ) , one of which is for supplying regulated power to the micro controller , and another timing capacitor (3 ) being connected to the micro controller the inputs of the being connected to a plurality of resistances (4 ) through plurality of diodes (5), for protecting the micro controller from high or reverse voltage , the output terminals of the micro controller being connected to the base of a plurality of bipolar transistors (6) and the gates of the mosfets (7 ), the outputs of the bipolar transistors (6 ) being connected to the coils of the of a plurality of relays (8), for driving the relays , the input of a voltage regulator being connected to the power source , the output of the voltage regulator( 9 ) being connected to the inputs of the capacitor for supplying regulated power to the micro controller , the interactive terminals of the micro controller being connected to a key board for feeding in the password and LCD for displaying the specific information , the terminals (5) of the diodes being capable of being connected to one or more sensors for sensing the tampering of the vehicle , the outputs ( 8 ) of the relays being connected to a locking device ( 12 ) and radio frequency transmitter (13) , the signals released from the transmitter capable of being received by a dedicated radio frequency receiver, the output of the mosfet ( 7 ) capable of being connected to a siren In a preferred embodiment of the invention the micro controller unit (16) can be placed in any part of the vehicle such as bonnet, boot etc preferably in the bonnet. The microprocessor chip used in the micro controller unit may be any known one. Similarly the electrolytic capacitors, the resistances, the diodes, the bipolar transistors, the mosfets relays, the board the LCD for the sensors locking device and radio frequency transmitter or mobile phone / Land phone are all known ones. In another embodiment of the invention there can be one or more zones in the vehicle where the sensors can be placed. In a preferred embodiment of the invention there are seven zones as illustrated in the Fig 4 As can be seen from fig 4, -the car may be divided into seven 'Z' zones, i.e. Zones, Zl, Z2, Z3, Z4, Z5, Z6 and Z7. Zonel is the front of the car. Zone 2 is the front door portion. Zone 3 is the rear door portion. Zone 4 is the hoot portion. Zones 5 and 6 are pane portions of the rear and front doors respectively. Zone 7 is the parking angle portion. The sensors which my be used, preferably may be selected from mechanical switches, proximity sensors and pulsed infrared sensors, interlock switch, ultra miniature switches. In a preferred embodiment of the present invention, infra red sensors cover the cabin and mechanical sensors cover in the bonnet and boot The locking device used may be electro magnetic lock and the electronic lock may be placed inside the bonnet and / or the boot The key board used may consists of a LCD unit, a LED for display of the status of the zones, an alpha numerical key pad as shown in Fig (3) for setting a four digit code and for putting the alarm ON and OFF The radio frequency dedicated receiver such as a mobile phone, pager may be used. Functioning of the device: The micro controller unit (16) is placed in any parts of the vehicle preferably in the bonnet, and the sensors are placed at the appropriate zones The micro controller unit (16) will receive all the signals from the sensors placed in the various Zones. The micro controller (1) drives the LCD display and key board (10) for making the necessary code entries, sensors which are fixed at various points in the vehicle sense the breach of security, give an alarm signal to the micro controller unit which in turn switches on the radio frequency transmitter (13) to send an alarm signal to a radio frequency receiver carried by the vehicle user / alarm signal via mobile module or phone to a mobile phone or a landline of the vehicle user. In the micro controller unit the diodes and resistances pass the sensor signals to the micro controller (1) senses if there is any change in the zones. B.P.T. (6) switches on relays (8), putting off the ignition and on / off the electromagnetic locks. Sensors used are, micro switches, proximity magnetic sensors and pulsed infrared sensors. The tilt sensor is a self designed modified gyroscope contraption it memorizes the inclination at which the alarm is activated. If a change occurs from this position a signal is sent to the micro controller (1) The keyboard and LCD shown in fig 3 is used for password code entry to put on / off the alarm etc. Procedure to arm the auto anti theft device: 1. Press the appropriate key in the keyboard for checking as to whether zones are secured / locked. Then the position of the zones will be displayed in the LCD located on the key board. If any zone(s) is / are not secured, then, manually the zones have to be secured properly. If the zones are secured then the next step is 2. Keying the changeable code number in the keyboard. If the code is correct the LCD will read as -ALL LOCK. In this condition all doors, boot, bonnet and brakes will be electro magnetically locked. If the code is wrong the user is allowed 5 tries. After which the micro controller unit will be triggered causing the siren to hoot and the radio frequency transmitter will release signals, which will be received by the radio frequency receiver. The device will not accept any more commands. 3. The device is then activated 4. When the ALARM STANDBY is displayed in the LCD , then press ENTER, now the driver has a maximum of twenty seconds ( adjustable for individual preference up to ninety seconds) get out of the vehicle and lock his door. The alarm will go to armed status after the time memorized. Now if anyone tries to open the Bonnet, Windows, Windscreen, Boot or Jack up the vehicle the alarm will set on in the users radio frequency pager/ mobile phone. 5. A LED in the radio frequency pager will signal to indicate that the user is within range of the radio frequency transmitter. Whenever the vehicle is broken (breach of security), the sensors sends signals to the micro controller unit which triggers the radio frequency transmitter to release the which will be received the radio frequency dedicated receiver as well as hoot the siren signals Thus the person having the radio frequency dedicated received will come to know about the breach of security of his vehicle The advantages of the invention: 1. . All accessories and bonnet of the vehicle are electro magnetically locked whenever the alarm device is activated. Since the boot and bonnet is locked the thief cannot have access to the alarm unit. 2. The ignition is disabled as soon as the device is activated. 3. The activation & deactivation of the device can be effected by a changeable code. I Claim: 1. An improved anti theft device for vehicles which comprises a micro controller unit (16) having a micro controller (1), two electrolytic capacitors (2 & 15), one of which is for supplying regulated power to the micro controller, and another timing capacitor (3) being connected to the micro controller, the inputs of the micro controller being cormected to a plurality of resistances (4) through plurality of diodes (5), for protecting the micro controller from high or reverse voltage, the output terminals of the micro controller being connected to the base of a plurality of bipolar transistors (6) and the gates of the mosfets (7 ),the outputs of the bipolar transistors (6 ) being connected to the coils of the of a plurality of relays (8) , for driving the relays , the input of a voltage regulator being connected to the power source , the output of the voltage regulator( 9 ) being connected to the inputs of the capacitor for supplying regulated power to the micro controller characterized in that, the interactive terminals of the micro controller being connected to a key board for feeding in the password and LCD for displaying the specific information , the terminals (5 ) of the diodes being capable of being connected to one or more sensors for sensing the tampering of the vehicle , the outputs (8) of the relays being connected to a locking device (12) and radio frequency transmitter ( 13) , the signals released from the transmitter capable of being received by a dedicated radio frequency receiver as in a pager , the output of the mosfet (7) capable of being connected to a siren. 2. An anti theft device as claimed in claim 1,wherein the vehicle is divided into 7 zones and the sensors used, preferably, are selected from mechanical switches, proximity sensors and pulsed infrared sensors, interlock switch, ultra miniature switches. 3. An antitheft device as claimed in claims 1 & 2 wherein the infrared sensors cover the cabin and mechanical sensors cover in the bonnet and boot 4. An anti theft device as claimed in claims 1 to 3 wherein the locking device used is electro magnetic locks and is placed inside the bonnet and the boot. 5. An anti theft device as claimed in claim 1 to 3 wherein the locking device used is an electronic lock and is placed inside the bonnet and the boot. 6. An antitheft device as claimed in claims 1 to 5 wherein the key board consists of a LCD Unit for display of the status of the zones, an alpha numerical key pad for setting a four digit code and for putting the alarm ON and OFF. 7. An anti theft device as claimed in claims 1 to 6, wherein the radio frequency dedicated receiver such as a mobile phone, pager is used. 8. An anti theft device for vehicles substantially as herein described and illustrated in figs 2 to 4 in the drawings accompanying the specifications.

Full Text

Field of the invention:
The present invention relates to an improved anti theft device for vehicles. More particularly the invention relates to an anti theft device for land vehicles especially four wheelers such as cars.
Prior art:
Different types of vehicle alarm / vehicle anti theft devices are known in the art. The presently available vehicle alarm / vehicle anti theft device have the following main features:
- Sensors
- To sense door opening
- To sense bonnet opening
- On the front and rear windscreens
- To sense boot opening and.
- To sense vibration.
Some of the known devices, in addition to the above sensors, have means to cut off
Ignition.
A known anti theft device is shown in fig 1 of the drawing accompanying this specification
The anti theft device for vehicles which are available in the prior art comprises a micro controller unit (17) comprising a micro controller (18) , two electrolytic capacitors (19 & 20) , one of which is for supplying regulated power to the micro controller , and another timing capacitor (21) being connected to the inputs of the micro controller being connected to a plurality of resistances (22 ) through plurality of diodes (23 ), for protecting the micro controller from high or reverse voltage , the output terminals of the micro controller being connected to the base of a of bipolar transistor (24 ) the output of the bipolar transistor (24) being connected to the coil of the of a relay (25) , for driving the relay , the input of a

voltage regulator being connected to the power source , the output of the voltage regulator(26) being connected to the inputs of the capacitor for supplying regulated power to the micro controller, the interactive terminals of the micro controller being connected to a radio frequency receiver (27) , the terminals of the diodes (23) being capable of being connected to sensors (28) and the output of the relay being capable of being connected to a siren (29)
In the above described present day known anti theft device, it has in the vehicle a siren, which whenever, anyone tampers with the doors or bonnet of the vehicle, initiates the siren, the sound of which will draw the attention of the nearby peoples as well the owner of the vehicle only local attention.
The main drawbacks of these presently available anti theft devices are the following:
The sensors in the present day theft devices are placed in the doorframes. Such an arrangement does not activate the sensors when the window panes are pulled down consequently there will be no siren. Thus a person can get access to the inside portion of the vehicle and to the accessories inside without giving any alarm to the nearby people. Such an access can also facilitate opening of the bonnet, snip off the sirens power supply thereby silencing the siren. The person can use the ignition, dismantle the steering lock and drive away the vehicle as if he is the owner of the vehicle without giving any alarm for the nearby people and / or to the real owner of the vehicle.
Passers by mostly view the siren hooting quizzically and if the person manages to silence the siren, the people will not notice and he can drive away the vehicle as if he is the real owner of the vehicle
In addition in the present day device there is no provision for locking the wheels. Hence any body can drive / push the vehicle away without the owner noticing such a move
Further since the bonnet is not locked any person can have access to various accessories and can drive away the vehicle without any bodies notice / attention

If the real owner of the vehicle is not in the vicinity of the vehicle he will not be in a position to view and or to know as to what is happening to his vehicle until he comes to take the vehicle On the other hand if the owner is in a place, beyond hearing of the siren, he would not even be able to hear the siren to prevent any theft of his vehicle.
Since, in the modern times, the theft of the vehicles are increasing and the cost of the vehicles have gone up steeply there is a need for an efficient anti theft device which would overcome most of the major drawbacks of the hitherto known devices
Therefore, the main objective of the present invention, is to provide an improved anti theft device for vehicles, which overcomes most of the major draw backs of the hitherto known devices
Still another objective of the present invention is to provide an improved anti theft device for vehicles having the various parts such as windows, doors, bonnet etc of the vehicles which are activated whenever such parts are broken or pulled down.
Yet another objective of the present invention is, is to provide an improved anti theft device for vehicles which is made active or inactive by using a numerical code, which can be set and reset by the user using a code by employing a key board.
Still another objective of the present invention is, to provide an improved anti theft device for vehicles, in which all the accessories such as, bonnet, boot and brake, are electromechanically locked whenever the anti theft device is put into the active mode thereby preventing the movement of the vehicle
Yet another objective of the present invention is, to provide an improved anti theft device for vehicles, wherein when a breach of security takes place, the sensors senses the breach and sends the signal to the micro controller unit which in turn, through the relay, triggers the radio frequency transmitter or mobile phone

The above objectives of the present invention has been achieved by developing a novel and improved anti theft device which facilitates in (i) making the device active or inactive by using a numerical code, which can be set and reset by the user using a code by employing a key board (ii) the accessories of the vehicles such as, bonnet, boot and brake etc, are electromechanically locked whenever the anti theft device is put into the active mode thereby preventing the movement of the vehicle and (iii) when a breach of security takes place , the sensors senses the breach and sends the signal to the micro controller unit which in turn, through the relay , triggers the radio frequency transmitter or mobile phone.
To the best of my knowledge such an anti theft device is not hitherto known and therefore is novel.
This invention will now be described with reference to the accompanying drawings,
wherein;
In the figs
Fig 2 is a view of the improved anti theft device of the present invention.
Fig 3 shows the Lay out of LCD & Key board.
Fig 4 shows the view of the four-wheeler indicating the preferred embodiment where the sensors and locking device used are placed.
It should be noted that though the device of the present invention has been described in relation to a four wheeler (car), similar arrangements are also applicable to other kinds of vehicles like two wheelers, three wheelers etc. and the present invention also envisages within its scope, the use of the device of the present invention to such vehicles.
The main features of the anti theft device of the present invention are;
1. A micro controller unit (16) having a micro controller (1).
2. A key board (10) and a LCD for feeding in the password and displaying the information.
3. One or more zones, preferably seven zones Marked as Z.

4. A locking device (12).
5. Radio frequency transmitter such as pager or mobile phone (13).
According to the present invention there is provided an improved anti theft device for vehicles which comprises a micro controller unit ( 16 ) having a micro controller (1 ), two electrolytic capacitors (2 & 15 ) , one of which is for supplying regulated power to the micro controller , and another timing capacitor (3 ) being connected to the micro controller the inputs of the being connected to a plurality of resistances (4 ) through plurality of diodes (5), for protecting the micro controller from high or reverse voltage , the output terminals of the micro controller being connected to the base of a plurality of bipolar transistors (6) and the gates of the mosfets (7 ), the outputs of the bipolar transistors (6 ) being connected to the coils of the of a plurality of relays (8), for driving the relays , the input of a voltage regulator being connected to the power source , the output of the voltage regulator( 9 ) being connected to the inputs of the capacitor for supplying regulated power to the micro controller , the interactive terminals of the micro controller being connected to a key board for feeding in the password and LCD for displaying the specific information , the terminals (5) of the diodes being capable of being connected to one or more sensors for sensing the tampering of the vehicle , the outputs ( 8 ) of the relays being connected to a locking device ( 12 ) and radio frequency transmitter (13) , the signals released from the transmitter capable of being received by a dedicated radio frequency receiver, the output of the mosfet ( 7 ) capable of being connected to a siren
In a preferred embodiment of the invention the micro controller unit (16) can be placed in any part of the vehicle such as bonnet, boot etc preferably in the bonnet.
The microprocessor chip used in the micro controller unit may be any known one. Similarly the electrolytic capacitors, the resistances, the diodes, the bipolar transistors, the mosfets relays, the board the LCD for the sensors locking device and radio frequency transmitter or mobile phone / Land phone are all known ones.

In another embodiment of the invention there can be one or more zones in the vehicle where the sensors can be placed. In a preferred embodiment of the invention there are seven zones as illustrated in the Fig 4
As can be seen from fig 4, -the car may be divided into seven 'Z' zones, i.e. Zones, Zl, Z2, Z3, Z4, Z5, Z6 and Z7. Zonel is the front of the car. Zone 2 is the front door portion. Zone 3 is the rear door portion. Zone 4 is the hoot portion. Zones 5 and 6 are pane portions of the rear and front doors respectively. Zone 7 is the parking angle portion.
The sensors which my be used, preferably may be selected from mechanical switches,
proximity sensors and pulsed infrared sensors, interlock switch, ultra miniature switches.
In a preferred embodiment of the present invention, infra red sensors cover the cabin and
mechanical sensors cover in the bonnet and boot
The locking device used may be electro magnetic lock and the electronic lock may be
placed inside the bonnet and / or the boot
The key board used may consists of a LCD unit, a LED for display of the status of the
zones, an alpha numerical key pad as shown in Fig (3) for setting a four digit code and for
putting the alarm ON and OFF
The radio frequency dedicated receiver such as a mobile phone, pager may be used.
Functioning of the device:
The micro controller unit (16) is placed in any parts of the vehicle preferably in the bonnet, and the sensors are placed at the appropriate zones
The micro controller unit (16) will receive all the signals from the sensors placed in the various Zones. The micro controller (1) drives the LCD display and key board (10) for making the necessary code entries, sensors which are fixed at various points in the vehicle sense the breach of security, give an alarm signal to the micro controller unit which in turn switches on the radio frequency transmitter (13) to send an alarm signal to a radio frequency receiver carried by the vehicle user / alarm signal via mobile module or phone to a mobile phone or a landline of the vehicle user.

In the micro controller unit the diodes and resistances pass the sensor signals to the micro controller (1) senses if there is any change in the zones. B.P.T. (6) switches on relays (8), putting off the ignition and on / off the electromagnetic locks. Sensors used are, micro switches, proximity magnetic sensors and pulsed infrared sensors. The tilt sensor is a self designed modified gyroscope contraption it memorizes the inclination at which the alarm is activated. If a change occurs from this position a signal is sent to the micro controller (1)
The keyboard and LCD shown in fig 3 is used for password code entry to put on / off the alarm etc.
Procedure to arm the auto anti theft device:
1. Press the appropriate key in the keyboard for checking as to whether zones are secured / locked. Then the position of the zones will be displayed in the LCD located on the key board. If any zone(s) is / are not secured, then, manually the zones have to be secured properly. If the zones are secured then the next step is
2. Keying the changeable code number in the keyboard. If the code is correct the LCD will read as -ALL LOCK. In this condition all doors, boot, bonnet and brakes will be electro magnetically locked. If the code is wrong the user is allowed 5 tries. After which the micro controller unit will be triggered causing the siren to hoot and the radio frequency transmitter will release signals, which will be received by the radio frequency receiver. The device will not accept any more commands.

3. The device is then activated
4. When the ALARM STANDBY is displayed in the LCD , then press ENTER, now the driver has a maximum of twenty seconds ( adjustable for individual preference up to ninety seconds) get out of the vehicle and lock his door. The alarm will go to armed status after the time memorized. Now if anyone tries to open the Bonnet, Windows, Windscreen, Boot or Jack up the vehicle the alarm will set on in the users radio frequency pager/ mobile phone.

5. A LED in the radio frequency pager will signal to indicate that the user is within range of the radio frequency transmitter.
Whenever the vehicle is broken (breach of security), the sensors sends signals to the micro controller unit which triggers the radio frequency transmitter to release the which will be received the radio frequency dedicated receiver as well as hoot the siren signals Thus the person having the radio frequency dedicated received will come to know about the breach of security of his vehicle
The advantages of the invention:
1. . All accessories and bonnet of the vehicle are electro magnetically locked whenever the alarm device is activated. Since the boot and bonnet is locked the thief cannot have access to the alarm unit. 2. The ignition is disabled as soon as the device is activated.
3. The activation & deactivation of the device can be effected by a changeable code.

I Claim:
1. An improved anti theft device for vehicles which comprises a micro controller
unit (16) having a micro controller (1), two electrolytic capacitors (2 & 15), one
of which is for supplying regulated power to the micro controller, and another timing
capacitor (3) being connected to the micro controller, the inputs of the micro
controller being cormected to a plurality of resistances (4) through plurality of diodes
(5), for protecting the micro controller from high or reverse voltage, the output
terminals of the micro controller being connected to the base of a plurality of
bipolar transistors (6) and the gates of the mosfets (7 ),the outputs of the bipolar
transistors (6 ) being connected to the coils of the of a plurality of relays (8) , for
driving the relays , the input of a voltage regulator being connected to the power
source , the output of the voltage regulator( 9 ) being connected to the inputs of the
capacitor for supplying regulated power to the micro controller characterized in that,
the interactive terminals of the micro controller being connected to a key board for
feeding in the password and LCD for displaying the specific information , the
terminals (5 ) of the diodes being capable of being connected to one or more
sensors for sensing the tampering of the vehicle , the outputs (8) of the relays being
connected to a locking device (12) and radio frequency transmitter ( 13) , the
signals released from the transmitter capable of being received by a dedicated radio
frequency receiver as in a pager , the output of the mosfet (7) capable of being
connected to a siren.
2. An anti theft device as claimed in claim 1,wherein the vehicle is divided into 7
zones and the sensors used, preferably, are selected from mechanical switches,
proximity sensors and pulsed infrared sensors, interlock switch, ultra miniature
switches.

3. An antitheft device as claimed in claims 1 & 2 wherein the infrared sensors cover the cabin and mechanical sensors cover in the bonnet and boot
4. An anti theft device as claimed in claims 1 to 3 wherein the locking device used is electro magnetic locks and is placed inside the bonnet and the boot.
5. An anti theft device as claimed in claim 1 to 3 wherein the locking device used is
an electronic lock and is placed inside the bonnet and the boot.
6. An antitheft device as claimed in claims 1 to 5 wherein the key board consists of a LCD Unit for display of the status of the zones, an alpha numerical key pad for setting a four digit code and for putting the alarm ON and OFF.
7. An anti theft device as claimed in claims 1 to 6, wherein the radio frequency dedicated receiver such as a mobile phone, pager is used.
8. An anti theft device for vehicles substantially as herein described and illustrated in figs 2 to 4 in the drawings accompanying the specifications.

Documents:

943-mas-2000-abstract.pdf

943-mas-2000-claims duplicate.pdf

943-mas-2000-claims original.pdf

943-mas-2000-correspondance other.pdf

943-mas-2000-correspondance po.pdf

943-mas-2000-description complete duplicate.pdf

943-mas-2000-description complete original.pdf

943-mas-2000-drawings.pdf

943-mas-2000-form 1.pdf

943-mas-2000-form 19.pdf

943-mas-2000-form 26.pdf

943-mas-2000-form 5.pdf

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Patent Number

207301

Indian Patent Application Number

943/MAS/2000

PG Journal Number

26/2007

Publication Date

29-Jun-2007

Grant Date

04-Jun-2007

Date of Filing

06-Nov-2000

Name of Patentee

SHRI. NAVNIT GURU

Applicant Address

NO.47/E,11ND CROSS,P.O.O.ROAD, RMS LAY OUT,SANJAY NAGAR, BANGALORE-560 094.

Inventors:

#	Inventor's Name	Inventor's Address
1	NAVNIT GURU	NO.47/E,11ND CROSS,P.O.O.ROAD, RMS LAY OUT,SANJAY NAGAR, BANGALORE-560 094.

PCT International Classification Number

B60R 25/10

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA