GB2119332A - Anti-theft apparatus for motor vehicles - Google Patents

Anti-theft apparatus for motor vehicles Download PDF

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Publication number
GB2119332A
GB2119332A GB8309417A GB8309417A GB2119332A GB 2119332 A GB2119332 A GB 2119332A GB 8309417 A GB8309417 A GB 8309417A GB 8309417 A GB8309417 A GB 8309417A GB 2119332 A GB2119332 A GB 2119332A
Authority
GB
United Kingdom
Prior art keywords
key switch
vehicle
valve
petrol
theft device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB8309417A
Other versions
GB8309417D0 (en
Inventor
Kenneth Ashton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB8309417A priority Critical patent/GB2119332A/en
Publication of GB8309417D0 publication Critical patent/GB8309417D0/en
Publication of GB2119332A publication Critical patent/GB2119332A/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/01—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens
    • B60R25/04—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the propulsion system, e.g. engine or drive motor
    • B60R25/042—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the propulsion system, e.g. engine or drive motor operating on the fuel supply

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lock And Its Accessories (AREA)

Abstract

In a vehicle anti-theft device, a key switch operated valve A is positioned in the petrol supply line, the key switch B forming a circuit with and activated by a lock and key mechanism. <IMAGE>

Description

SPECIFICATION Improvements in anti-theft apparatus for motor vehicles The invention relates to an anti-theft device for motor vehicles.
The object of the present invention is to provide a vehicle anti-theft device which unless de-activated will cut off the petrol supply to the engine after the vehicle has moved a short distance.
According to the invention, an anti-theft device for motor vehicles comprises a key switch operated valve positioned in the petrol supply line between the petrol tank and the carburettor, said switch forming a circuit with and activated by a lock and key mechanism.
In a preferred embodiment for carrying out the invention an anti-theft device for motor vehicles comprises a solenoid operated valve situated in the petrol line between the fuel tank and petrol pump.
Said valve is electrically connected to a key switch preferably located remotely from the aforementioned valve and hidden from view for example, underneath the dash board or behind the licence plate.
Both the valve and key switch are connected in series to the vehicle battery thereby forming a complete circuit.
The invention will now be described by way of example and with reference to the following drawing.
The figure is a diagrammatic representation of the relative position of the valve and the circuit incorporating same.
A solenoid operated valve A is connected into the motor vehicle fuel delivery pipe 1 at any position between the fuel tank 2 and the petrol pump 3. A filter 4 may be placed in the fuel pipe between the fuel tank and the solenoid operated valve. Three electrical connections lead from the solenoid operated valve A, one of which provides a casing earth 5, the second being connected to a key switch B, and the third forming the solenoid earth return 9. The key switch B is electrically connected through a line fuse 6 and the vehicle main fuse box 7 to the vehicle battery 8 thereby forming a complete electric circuit with the solenoid operated valve A.
The obstruction contained in the valve for blocking the fuel pipe may be in the form of a plunger, flap valve or the like.
When fitted onto a motor vehicle the key switch of the previously described anti-theft device may be situated on the exterior of the vehicle in a hidden but accessible position such as the wheel arch, or behind a retractable licence plate. Conversely the key switch may be affixed inside the vehicle underneath the dash board, beneath the seats or any other secreted, accessible position.
Upon leaving the vehicle for any length of time the driver inserts a key into the hidden key switch rotating it 90 in an anti-clockwise direction and then withdraws the key. This results in the breaking of the electrical circuit. Accordingly the obstruction in the form of a plunger, flap valve or the like, contained in the solenoid operated valve then moves into position across the fuel pipe line preventing any further supply of petrol to the engine.
In the event of a theft the closure of the petrol supply line renders the vehicle immovable after all the residual petrol in the carburettor has been used.
The thief would then probably choose to leave the vehicle rather than stay in close vicinity to the site of the theft.
When the driver returns to the vehicle he inserts the key into the hidden key switch and rotates is 90 in a clockwise direction. This completes the electic circuit between the key switch, solenoid operated valve and the vehicle battery causing the retraction of the valve obstruction thereby allowing an unrestricted flow of petrol from the fuel tank to the carburettor.
In further embodiments the anti-theft device may be in a kit form for installation in second hand vehicles.
1. An anti-theft device for motor vehicles comprising a key switch operated valve positioned in the petrol supply line, said key switch forming a circuit with and activated by a lock and key mechanism.
2. An anti-theft device for motor vehicles as claimed in claim 1 wherein the key switch operated valve is connected into the petrol supply line between the fuel tank and the carburettor fuel pumps carburettors.
3. An anti-theft device for motor vehicles as claimed in Claims 1 and 2 in which the valve is a solenoid operated valve.
4. An anti-theft device for motor vehicles as claimed in Claim 3 wherein the solenoid operated valve has a retractable obstruction in the form of a plunger, flap valve or the like for preventing the flow of petrol in the petrol supply line.
5. An anti-theft device for motor vehicles as claimed in Claims 1 and 4 in which the solenoid operated valves retractable obstruction is extended when the circuit between valve, key switch and vehicle battery is broken by insertion and turning of a key in the key switch.
6. An anti-theft device for motor vehicles as claimed in Claims 1,2 and 5 wherein the key switch is located on the exterior of the vehicle.
7. An anti-theft device for motor vehicles as claimed in Claims 1,25 and 6 as in which the key switch is located on the interior of the vehicle.
8. An anti-theft device for motor vehicles substantially as hereinbefore described with reference to and as illustrated in the accompanying drawing.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (8)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Improvements in anti-theft apparatus for motor vehicles The invention relates to an anti-theft device for motor vehicles. The object of the present invention is to provide a vehicle anti-theft device which unless de-activated will cut off the petrol supply to the engine after the vehicle has moved a short distance. According to the invention, an anti-theft device for motor vehicles comprises a key switch operated valve positioned in the petrol supply line between the petrol tank and the carburettor, said switch forming a circuit with and activated by a lock and key mechanism. In a preferred embodiment for carrying out the invention an anti-theft device for motor vehicles comprises a solenoid operated valve situated in the petrol line between the fuel tank and petrol pump. Said valve is electrically connected to a key switch preferably located remotely from the aforementioned valve and hidden from view for example, underneath the dash board or behind the licence plate. Both the valve and key switch are connected in series to the vehicle battery thereby forming a complete circuit. The invention will now be described by way of example and with reference to the following drawing. The figure is a diagrammatic representation of the relative position of the valve and the circuit incorporating same. A solenoid operated valve A is connected into the motor vehicle fuel delivery pipe 1 at any position between the fuel tank 2 and the petrol pump 3. A filter 4 may be placed in the fuel pipe between the fuel tank and the solenoid operated valve. Three electrical connections lead from the solenoid operated valve A, one of which provides a casing earth 5, the second being connected to a key switch B, and the third forming the solenoid earth return 9. The key switch B is electrically connected through a line fuse 6 and the vehicle main fuse box 7 to the vehicle battery 8 thereby forming a complete electric circuit with the solenoid operated valve A. The obstruction contained in the valve for blocking the fuel pipe may be in the form of a plunger, flap valve or the like. When fitted onto a motor vehicle the key switch of the previously described anti-theft device may be situated on the exterior of the vehicle in a hidden but accessible position such as the wheel arch, or behind a retractable licence plate. Conversely the key switch may be affixed inside the vehicle underneath the dash board, beneath the seats or any other secreted, accessible position. Upon leaving the vehicle for any length of time the driver inserts a key into the hidden key switch rotating it 90 in an anti-clockwise direction and then withdraws the key. This results in the breaking of the electrical circuit. Accordingly the obstruction in the form of a plunger, flap valve or the like, contained in the solenoid operated valve then moves into position across the fuel pipe line preventing any further supply of petrol to the engine. In the event of a theft the closure of the petrol supply line renders the vehicle immovable after all the residual petrol in the carburettor has been used. The thief would then probably choose to leave the vehicle rather than stay in close vicinity to the site of the theft. When the driver returns to the vehicle he inserts the key into the hidden key switch and rotates is 90 in a clockwise direction. This completes the electic circuit between the key switch, solenoid operated valve and the vehicle battery causing the retraction of the valve obstruction thereby allowing an unrestricted flow of petrol from the fuel tank to the carburettor. In further embodiments the anti-theft device may be in a kit form for installation in second hand vehicles. CLAIMS
1. An anti-theft device for motor vehicles comprising a key switch operated valve positioned in the petrol supply line, said key switch forming a circuit with and activated by a lock and key mechanism.
2. An anti-theft device for motor vehicles as claimed in claim 1 wherein the key switch operated valve is connected into the petrol supply line between the fuel tank and the carburettor fuel pumps carburettors.
3. An anti-theft device for motor vehicles as claimed in Claims 1 and 2 in which the valve is a solenoid operated valve.
4. An anti-theft device for motor vehicles as claimed in Claim 3 wherein the solenoid operated valve has a retractable obstruction in the form of a plunger, flap valve or the like for preventing the flow of petrol in the petrol supply line.
5. An anti-theft device for motor vehicles as claimed in Claims 1 and 4 in which the solenoid operated valves retractable obstruction is extended when the circuit between valve, key switch and vehicle battery is broken by insertion and turning of a key in the key switch.
6. An anti-theft device for motor vehicles as claimed in Claims 1,2 and 5 wherein the key switch is located on the exterior of the vehicle.
7. An anti-theft device for motor vehicles as claimed in Claims 1,25 and 6 as in which the key switch is located on the interior of the vehicle.
8. An anti-theft device for motor vehicles substantially as hereinbefore described with reference to and as illustrated in the accompanying drawing.
GB8309417A 1982-04-29 1983-04-07 Anti-theft apparatus for motor vehicles Withdrawn GB2119332A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8309417A GB2119332A (en) 1982-04-29 1983-04-07 Anti-theft apparatus for motor vehicles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8212470 1982-04-29
GB8309417A GB2119332A (en) 1982-04-29 1983-04-07 Anti-theft apparatus for motor vehicles

Publications (2)

Publication Number Publication Date
GB8309417D0 GB8309417D0 (en) 1983-05-11
GB2119332A true GB2119332A (en) 1983-11-16

Family

ID=26282691

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8309417A Withdrawn GB2119332A (en) 1982-04-29 1983-04-07 Anti-theft apparatus for motor vehicles

Country Status (1)

Country Link
GB (1) GB2119332A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2678227A1 (en) * 1991-06-25 1992-12-31 Aubry Alexandre Anti-theft supply device for internal-combustion engine vehicles

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB447904A (en) * 1934-11-14 1936-05-14 Charles James Evans Improvements in connection with thief-proof devices for, and means of preventing unauthorised use of motor vehicles
US3630306A (en) * 1969-12-17 1971-12-28 Victor Shur Ignition-controlled mechanism for blocking automotive fuel line
US3687216A (en) * 1970-03-18 1972-08-29 Richard A Tracy Vehicle anti-theft device
US3719201A (en) * 1971-03-12 1973-03-06 M Minks Automobile electrical system
US3756341A (en) * 1971-07-22 1973-09-04 Safetech Inc Vehicle anti-theft system
US3907060A (en) * 1973-04-23 1975-09-23 Cahs Inc Motor vehicle theft-prevention apparatus
US3968666A (en) * 1973-06-15 1976-07-13 Mackinnon Richard B Auto anti-theft device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB447904A (en) * 1934-11-14 1936-05-14 Charles James Evans Improvements in connection with thief-proof devices for, and means of preventing unauthorised use of motor vehicles
US3630306A (en) * 1969-12-17 1971-12-28 Victor Shur Ignition-controlled mechanism for blocking automotive fuel line
US3687216A (en) * 1970-03-18 1972-08-29 Richard A Tracy Vehicle anti-theft device
US3719201A (en) * 1971-03-12 1973-03-06 M Minks Automobile electrical system
US3756341A (en) * 1971-07-22 1973-09-04 Safetech Inc Vehicle anti-theft system
US3907060A (en) * 1973-04-23 1975-09-23 Cahs Inc Motor vehicle theft-prevention apparatus
US3968666A (en) * 1973-06-15 1976-07-13 Mackinnon Richard B Auto anti-theft device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2678227A1 (en) * 1991-06-25 1992-12-31 Aubry Alexandre Anti-theft supply device for internal-combustion engine vehicles

Also Published As

Publication number Publication date
GB8309417D0 (en) 1983-05-11

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)