GB1420593A - Anti-theft warning systems for road vehicles - Google Patents

Anti-theft warning systems for road vehicles

Info

Publication number
GB1420593A
GB1420593A GB6096371A GB6096371A GB1420593A GB 1420593 A GB1420593 A GB 1420593A GB 6096371 A GB6096371 A GB 6096371A GB 6096371 A GB6096371 A GB 6096371A GB 1420593 A GB1420593 A GB 1420593A
Authority
GB
United Kingdom
Prior art keywords
sensing circuit
transistor
switch
dec
alarm
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.)
Expired
Application number
GB6096371A
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.)
Lucas Electrical Co Ltd
Original Assignee
Lucas Electrical Co Ltd
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 Lucas Electrical Co Ltd filed Critical Lucas Electrical Co Ltd
Priority to GB6096371A priority Critical patent/GB1420593A/en
Publication of GB1420593A publication Critical patent/GB1420593A/en
Expired legal-status Critical Current

Links

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
    • B60R25/10—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles actuating a signalling device

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

1420593 Preventing unauthorized use of vehicles LUCAS ELECTRICAL CO Ltd 19 Dec 1972 [31 Dec 1971] 60963/71 Heading F1B [Also in Division G4] An anti-theft warning system for a road vehicle comprises a sensing circuit 26-38 for giving an alarm or effecting a control such as disabling the ignition if an unauthorized entry into the vehicle is attempted, a switch 39 for rendering the circuit 26-38 operative and a warning lamp 19 operable when the ignition switch 20 is opened for indicating that the sensing circuit has not been set. The electrical system includes apart from the sensing circuit an alternator 11, rectifiers 12, 13, 16, a voltage regulator 18, a battery 9 and a control transistor 21. When the driver turns off the ignition switch 20, transistor 21 remains conducting for lighting up the indication lamp 19. Depression of the manual switch 39 turns off transistor 21 and also sets the sensing circuit including a microphone 28. Noises resulting from attempted entry are amplified at 26, 31 for turning on a thyristor 37 and activating a relay 38 for energizing the alarm, e.g. a horn, preferably intermittently.
GB6096371A 1971-12-31 1971-12-31 Anti-theft warning systems for road vehicles Expired GB1420593A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB6096371A GB1420593A (en) 1971-12-31 1971-12-31 Anti-theft warning systems for road vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6096371A GB1420593A (en) 1971-12-31 1971-12-31 Anti-theft warning systems for road vehicles

Publications (1)

Publication Number Publication Date
GB1420593A true GB1420593A (en) 1976-01-07

Family

ID=10486376

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6096371A Expired GB1420593A (en) 1971-12-31 1971-12-31 Anti-theft warning systems for road vehicles

Country Status (1)

Country Link
GB (1) GB1420593A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2210486A (en) * 1987-09-30 1989-06-07 Shiroki Corp Theft alarm device for automobiles
GB2278637A (en) * 1993-05-11 1994-12-07 Alan Graham Richmond Anti-theft vehicle engine fuel supply
GB2279404A (en) * 1993-06-28 1995-01-04 David John Page Vehicle anti-theft device
GB2283377A (en) * 1993-10-29 1995-05-03 Gardiner Technology Ltd Burglar alarm apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2210486A (en) * 1987-09-30 1989-06-07 Shiroki Corp Theft alarm device for automobiles
GB2278637A (en) * 1993-05-11 1994-12-07 Alan Graham Richmond Anti-theft vehicle engine fuel supply
GB2278637B (en) * 1993-05-11 1997-05-07 Alan Graham Richmond Vehicle security system
GB2279404A (en) * 1993-06-28 1995-01-04 David John Page Vehicle anti-theft device
GB2283377A (en) * 1993-10-29 1995-05-03 Gardiner Technology Ltd Burglar alarm apparatus
GB2283377B (en) * 1993-10-29 1998-03-04 Gardiner Technology Ltd Burglar alarm apparatus

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee