IE830440L - Security system using oscillator circuit - Google Patents

Security system using oscillator circuit

Info

Publication number
IE830440L
IE830440L IE44083A IE44083A IE830440L IE 830440 L IE830440 L IE 830440L IE 44083 A IE44083 A IE 44083A IE 44083 A IE44083 A IE 44083A IE 830440 L IE830440 L IE 830440L
Authority
IE
Ireland
Prior art keywords
oscillator circuit
security system
vehicle
tuned
crystal
Prior art date
Application number
IE44083A
Other versions
IE54433B1 (en
Original Assignee
Malcolm Macnaughton
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 Malcolm Macnaughton filed Critical Malcolm Macnaughton
Priority to IE44083A priority Critical patent/IE54433B1/en
Priority to GB8405403A priority patent/GB2136620B/en
Publication of IE830440L publication Critical patent/IE830440L/en
Publication of IE54433B1 publication Critical patent/IE54433B1/en

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
    • B60R25/01—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
    • B60R25/045—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 by limiting or cutting the electrical supply to the propulsion unit
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lock And Its Accessories (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

A security system for a vehicle comprises a crystal oscillator circuit with a crystal (10) which is located inside the vehicle and removable by the driver, a filter circuit (Fig. 2) tuned to the frequency of the oscillator circuit 1 and means such as a solenoid (Fig. 4) or relay (Fig. 8) for preventing starting of the vehicle except upon receipt of a signal from the oscillator circuit via the tuned filter circuit. The technique described may be used generally to disable apparatus against unauthorised use. [GB2136620A]
IE44083A 1983-03-02 1983-03-02 A security system IE54433B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
IE44083A IE54433B1 (en) 1983-03-02 1983-03-02 A security system
GB8405403A GB2136620B (en) 1983-03-02 1984-03-01 A security system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IE44083A IE54433B1 (en) 1983-03-02 1983-03-02 A security system
IE184883 1983-08-04

Publications (2)

Publication Number Publication Date
IE830440L true IE830440L (en) 1984-09-02
IE54433B1 IE54433B1 (en) 1989-10-11

Family

ID=26318897

Family Applications (1)

Application Number Title Priority Date Filing Date
IE44083A IE54433B1 (en) 1983-03-02 1983-03-02 A security system

Country Status (2)

Country Link
GB (1) GB2136620B (en)
IE (1) IE54433B1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8605794D0 (en) * 1986-03-10 1986-04-16 Norris D H Immobilising vehicle
GB2237602B (en) * 1988-04-14 1993-02-17 Liftsonic Ltd A security system
GB8819003D0 (en) * 1988-04-14 1988-09-14 Liftsonic Ltd Electrical apparatus
GB8808764D0 (en) 1988-04-14 1988-05-18 Main J T Security anti/theft device for vehicles
GB2248883B (en) * 1988-04-14 1993-02-17 Liftsonic Ltd A security system
EP0377816A3 (en) * 1988-12-01 1991-05-22 Werner Hauer Security device for motor vehicles with switching elements integrated in an engine accessory
DE3844377A1 (en) * 1988-12-30 1990-07-05 Griesemer Albert IGNITION SYSTEM FOR MOTOR VEHICLES
GB2286625A (en) * 1994-02-10 1995-08-23 Malcolm John Lowther Vehicle bonnet lock
GB2288848A (en) * 1994-04-22 1995-11-01 Hsiang Sheng Hsiang Vehicle anti-theft circuit
GB2297804A (en) * 1995-02-09 1996-08-14 Christopher Clifford Anti-theft vehicle engine fuel supply
GB2299829A (en) * 1995-04-13 1996-10-16 Ewan George Thompson Vehicle immobilizer
WO2010116201A1 (en) * 2009-04-07 2010-10-14 Techinvest Ltda Electronic speedometer assembly in safety electronic system for vehicle start blockage in general and redundant relays for vehicle operation in case of electronic system failures

Also Published As

Publication number Publication date
GB2136620A (en) 1984-09-19
GB2136620B (en) 1985-11-20
GB8405403D0 (en) 1984-04-04
IE54433B1 (en) 1989-10-11

Similar Documents

Publication Publication Date Title
IE830440L (en) Security system using oscillator circuit
CA2253461A1 (en) Multiple input frequency locked loop
CA2104215A1 (en) Radio receiver for forming a baseband signal of time-varying frequencies
AU586198B2 (en) A method and an apparatus for the demodulation of high frequency modulated signals by means of digital filters and digital demodulators, and the application of the method in a remote control receiver
NO873301D0 (en) PROCEDURE AND DEVICE FOR MEASURING DISTANCE.
JPS51151939A (en) Alarm for vehicle
DE3886531D1 (en) ARRANGEMENT FOR FILTERING AN FM VHF RECEPTION SIGNAL.
WO1998038769A3 (en) Frame alignment of test signals in a communication system
MX9800675A (en) Vehicle anti-theft system.
JPS5320240A (en) Connector for transmission of logic signal
AU527084B2 (en) Centre frequency tuning system for radiofrequency signal receiver
JPS57183131A (en) Method and device for locking phase locked loop at reference signal
EP0153835A3 (en) Radio receiver
CA2072474A1 (en) Radio receiver capable of suppressing a frequency drift in an intermediate frequency
AU3815689A (en) Process and apparatus for the filtration of gaseous or liquid dispersions
JPS51116609A (en) Initial connection system and apparatus for time division multiple acc ess communication system
JPS5359185A (en) Remote control signal system
IL88435A (en) Chirped backscatter filter
FR2539691B1 (en) WHEEL LOCKING DEVICE, IN PARTICULAR FOR FOLDABLE STROLLERS
EP0005127A3 (en) Improvement in systems of frequency translation of frequency-modulated signals
JPS5415235A (en) Device for warning forgotten starter switch key to be removed for vehicle
JPS55164536A (en) Alarming method for automobile
SE9100323L (en) METHOD FOR AUTHORIZING A CLOSE SYNCHRONIZATION PROCESS FOR A DOUBLE-DIRECT COMMUNICATION BETWEEN A TRANSPONDER AND AN INTERROGATOR WHERE DIFFERENT FREQUENCIES MAY BE USED BEFORE COMMUNICATION BETWEEN THE INTERROGATOR AND TRANSPORTER
BR9507791A (en) Process and apparatus for phase compensation in a vehicle control system
JPS5277337A (en) Remote-controlled monitoring system for construction vehicles

Legal Events

Date Code Title Description
MM4A Patent lapsed