EP0385800A1 - Dispositif antivol - Google Patents

Dispositif antivol Download PDF

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Publication number
EP0385800A1
EP0385800A1 EP90302242A EP90302242A EP0385800A1 EP 0385800 A1 EP0385800 A1 EP 0385800A1 EP 90302242 A EP90302242 A EP 90302242A EP 90302242 A EP90302242 A EP 90302242A EP 0385800 A1 EP0385800 A1 EP 0385800A1
Authority
EP
European Patent Office
Prior art keywords
cable
housing
alarm
sensing means
detector
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Withdrawn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
EP90302242A
Other languages
German (de)
English (en)
Inventor
James Molohon
Oyvind Baarsten
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.)
Molohon Kari
Original Assignee
Molohon Kari
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 Molohon Kari filed Critical Molohon Kari
Publication of EP0385800A1 publication Critical patent/EP0385800A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/14—Mechanical actuation by lifting or attempted removal of hand-portable articles
    • G08B13/1445—Mechanical actuation by lifting or attempted removal of hand-portable articles with detection of interference with a cable tethering an article, e.g. alarm activated by detecting detachment of article, breaking or stretching of cable
    • G08B13/1454—Circuit arrangements thereof
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/12—Mechanical actuation by the breaking or disturbance of stretched cords or wires
    • G08B13/126—Mechanical actuation by the breaking or disturbance of stretched cords or wires for a housing, e.g. a box, a safe, or a room
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/26—Electrical actuation by proximity of an intruder causing variation in capacitance or inductance of a circuit

Definitions

  • This invention relates to anti-theft devices, for example devices for securing vehicles, for example bicycles, motor bikes and the like.
  • the invention is also suitable as an intrusion detector, for example for detecting unauthorised entry into a room, as a personal alarm or, as an anti-theft device for luggage or merchandise.
  • the present invention aims to provide an improved anti-theft device and accordingly there is provided an anti-theft device, comprising a housing, a cable attached at one end to the housing, the cable being arranged for looping around or through an object to be secured and having a free end detachably connectable with the housing, sensing means operable when the free end of the cable is attached to the housing for sensing whether the cable has been cut or the device approached and for generating a signal in response thereto, and an alarm for activating an audible or visual alarm in response to a signal from the sensing means.
  • a device embodying invention has the advantage that it not only responds to attempts to cut the cable but also to contact or approach.
  • the sensing means comprise a proximity detector which is preset to activate the alarm when an approacher is within a predetermined distance of the device, for example 5cms.
  • the proximity detector comprises an internal aerial.
  • the invention is also applicable to protection of items other than two wheeled vehicles, for example it be used as a luggage or merchandise alarm.
  • the device may be used as a door or window alarm in which case it is desirable to include an external antenna in the proximity detector in order that the alarm may be activated from a greater distance.
  • the cable is not necessary for all applications of the invention and a further aspect provides an anti-theft device, comprising a housing, sensing means for detecting approach of the device by a party and for generating a signal indicative thereof, the sensing means comprising an antenna located inside the housing, and an alarm for emitting an audible or visual alarm in response to signal from the sense means.
  • the sensing means also include a delay which prevents an alarm signal being generated for a short period after the device is touched or approached so that the operator may set and disable the device without the alarm sounding.
  • the invention also resides in a proximity detector which may be hung on a door or otherwise arranged to detect the approach of a malefactor to a room.
  • the device suitable for use as an anti-theft device for a bicycle may be used as the proximity detector.
  • the device be hung over the door handle by the cable and an external antenna attached to the proximity detector so that the alarm will sound even though the potential intruder is a long way from the device.
  • the device comprises a chain or cable 1 to be passed around the frame of, for example, a bicycle.
  • the cable is fixed in a housing 2 at its one end 3 and is removably connectable to the housing at its other free end 4.
  • the free end 4 ( Figure 4) comprises a male terminal which can be inserted into an entrance 5 in the housing and held in position by a key operated lock 6 which clamps a reduced thickness portion of the terminal preventing withdrawal of the cable from the housing.
  • the cable is made from any suitable material and may for example be braided steel cable.
  • a proximity detector 10 Inside the housing is mounted a proximity detector 10, a cable-cut detector 12 and an alarm device 18,20 (Figure 2), all of which are activated by a switch 8 mounted on the housing.
  • the switch may disable the device (position 0) activate the touch detector alone (position II) or activate both cable-cut and touch detectors (position I).
  • the lock and switch may be incorporated so that the unlocked state corresponds to position 0 of the switch and the key may turn the lock to two locked states correponding to positions I and II.
  • two further switch positions are added.
  • Position III activates the cut detector alone and position IV is a test position.
  • the cable-cut detector 12 When position I of the switch 8 is selected, the cable-cut detector 12 is coupled to a power supply (not shown). The detector 12 is also coupled to an amplifier 20 and a loudspeaker 18. The detector is connected to one of the supply rails via a pair of wires which extend along the length of the cable terminating in a resistance 24. While this connection is intact, no current will be passed to the loudspeaker 18. However, when the cable is severed, and with it the wires 22, the loudspeaker will be energised and an audible signal emitted. The wires 22 and the resistor are arranged such that they extend along the whole length of the cable and into the housing when the cable is clamped so that the circuit will always be broken if the cable is cut irrespective of where the cut is.
  • FIG. 3 shows the cable-cut detector 12 in more detail.
  • the detector comprises an operational amplifier 30 connected to positive and negative voltage rails 32, 34 and having High and Low inputs H and L.
  • the low input is set with respect to positive and negative voltage rails 32, 34 by bias resistors 36, 38 and the high level is set by bias resistors 40, 42.
  • the gain of the amplifier is controlled by feedback resistor 44.
  • the high (H) and low inputs to the amplifier 30 are the wires 22 of the cable.
  • the two wires are joined by the terminating resistor 24 and the broken line 1 represents the cable casing 1.
  • Broken line 2 represents the detector casing 2.
  • the wires 22 and resistor 24 short circuit the inputs to the amplifier 30 and there is no output to the amplifier 20.
  • the H and L inputs assume their values determined by the values of the biasing resistors 36 and 42 and there will be an output from the cut-detector. This output will be amplified by amplifier 20 and then form the input to loudspeaker 18.
  • the proximity detector 10 is connected in position I. As the proximity detector causes a signal to be passed to the speaker when the device is approached, it is desirable to include a delay 26 in the circuit to enable the operator to enable and disable the device without activating the loudspeaker.
  • the proximity detector includes an internal antenna 28 which is shown schematically in Figure 2. In practice it is preferred to include the antenna inside the cable casing 1 as illustrated in Figure 4. The delay may be set to a convenient time, for example, five seconds. The delay may also be incorporated into the cable-cut detector 12 although this is not shown in Figure 2.
  • the proximity detector is shown in Figure 5 and is a modification of a standard Siemens touch pad circuit, for example one sold under the circuit indentification code S576.
  • the circuit is modified such that the sensor input 100 is the internal antenna input, thus converting a touch detector to a proximity detector.
  • a threshold detector in the circuit detects whether the level has fallen below a given level, and, if so, allows an output signal to be passed from the detector via the amplifier to the loudspeaker.
  • a switch (not shown) may be included. This switch is coupled to the cable-cut detector and is set when the device is mounted on the frame of the bicycle. An attempt to remove the device will trip the switch and cause the cable-cut detector to transmit a signal to the loudspeaker.
  • An additional tamper switch may be included to prevent unauthorised removal of the back cover of the casing so that a malefactor cannot remove the battery and so disable the device.
  • the embodiment described provides an anti-theft device that will sound an alarm when an attempt to cut the cable lock is made. Furthermore, the alarm can be set to sound if the device is approached or tampered with.
  • An external antenna may be fitted to the proximity detector. This makes the device, with or without the cut-detector fitted, especially suitable for use as a door alarm.
  • the device may hung by the cable or any other attachment which may be fitted on the door of, for example, a hotel room.
  • the external antenna may be fed under the door into a corridor so that the alarm sounds on approach of a malefactor.
  • the device could be positioned anywhere within a room provided that a sufficiently long antenna is used.
  • the sensitivity of the device is preset but may at the manufacturing stage be varied by adjusting the threshold detector to suit the prevailing conditions and to compensate for losses that will be present if a long external antenna cable is used.
  • the alarm will be activated, regardless of the external antenna, by a hand on the door handle on the other side of the door, provided that the door handle is made of metal.
  • the intruder acts as an earth which triggers the alarm. This is not the case where the door handle is non-conducting.
  • the invention may be adapted for use as an anti-theft device in any situation without departing from the scope of the invention.
  • the device having a cut detector and cable may be used with any two-wheeled vehicle or with a car, in which case the cable could be extended for extension through the steering wheel.
  • the device could be adapted for use with merchandise or luggage or for use not only as a door alarm but to detect unauthorised entry or approach at any part of a building or vehicle.
  • the device could be used as a window alarm in a building or as a general alarm for a car or the like.
  • the device could be used as a personal alarm.
  • Other uses and modifications within the scope of the invention will occur to the reader skilled in the art.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
EP90302242A 1989-03-02 1990-03-02 Dispositif antivol Withdrawn EP0385800A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8904730 1989-03-02
GB898904730A GB8904730D0 (en) 1989-03-02 1989-03-02 Anti-theft device

Publications (1)

Publication Number Publication Date
EP0385800A1 true EP0385800A1 (fr) 1990-09-05

Family

ID=10652571

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90302242A Withdrawn EP0385800A1 (fr) 1989-03-02 1990-03-02 Dispositif antivol

Country Status (2)

Country Link
EP (1) EP0385800A1 (fr)
GB (1) GB8904730D0 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0667601A4 (fr) * 1993-08-31 1996-03-27 Kubota Kk Dispositif antivol.
EP0710939A1 (fr) * 1994-11-04 1996-05-08 Casio Computer Company Limited Dispositif d'alarme de petites dimensions
US5712623A (en) * 1994-11-04 1998-01-27 Casio Computer Co., Ltd. Small-sized alarm device
US5767773A (en) * 1994-07-29 1998-06-16 Kubota Corporation Theft preventive apparatus and radio wave receiving signaling device
US5844484A (en) * 1993-08-31 1998-12-01 Kubota Corporation Theft preventive apparatus having alarm output
US5959532A (en) * 1994-07-29 1999-09-28 Kubota Corporation Theft preventive apparatus and radio wave receiving signaling device
DE102004029666A1 (de) * 2004-06-18 2006-01-05 Förtig, Bernd Absperrvorrichtung für eine Tür oder ein Fenster
EP1749955A1 (fr) * 2005-08-03 2007-02-07 S.A.A.A. Sas Systemes D'automatismes D'alarmes Automatiques Détecteur lasso verrouillable pour système antivol
CN115021176A (zh) * 2022-07-07 2022-09-06 中航天建设工程集团有限公司 一种智能电缆挂钩

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3772645A (en) * 1972-01-20 1973-11-13 T P S Inc Costa Mesa Vehicle alarm system
US3896425A (en) * 1973-10-16 1975-07-22 Tyco Laboratories Inc Proximity detector
GB2066536A (en) * 1979-01-04 1981-07-08 Bajius T Alarm Device
GB2148248A (en) * 1983-10-25 1985-05-30 James Kerr Dunlop Anti-theft device
US4621258A (en) * 1983-08-22 1986-11-04 Campman James P Proximity detecting apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3772645A (en) * 1972-01-20 1973-11-13 T P S Inc Costa Mesa Vehicle alarm system
US3896425A (en) * 1973-10-16 1975-07-22 Tyco Laboratories Inc Proximity detector
GB2066536A (en) * 1979-01-04 1981-07-08 Bajius T Alarm Device
US4621258A (en) * 1983-08-22 1986-11-04 Campman James P Proximity detecting apparatus
GB2148248A (en) * 1983-10-25 1985-05-30 James Kerr Dunlop Anti-theft device

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0667601A4 (fr) * 1993-08-31 1996-03-27 Kubota Kk Dispositif antivol.
US5610587A (en) * 1993-08-31 1997-03-11 Kubota Corporation Theft preventive apparatus having an alarm output device
US5844484A (en) * 1993-08-31 1998-12-01 Kubota Corporation Theft preventive apparatus having alarm output
US5767773A (en) * 1994-07-29 1998-06-16 Kubota Corporation Theft preventive apparatus and radio wave receiving signaling device
US5959532A (en) * 1994-07-29 1999-09-28 Kubota Corporation Theft preventive apparatus and radio wave receiving signaling device
US6020819A (en) * 1994-07-29 2000-02-01 Kubota Corporation Radio wave receiving signaling device
EP0710939A1 (fr) * 1994-11-04 1996-05-08 Casio Computer Company Limited Dispositif d'alarme de petites dimensions
US5712623A (en) * 1994-11-04 1998-01-27 Casio Computer Co., Ltd. Small-sized alarm device
DE102004029666A1 (de) * 2004-06-18 2006-01-05 Förtig, Bernd Absperrvorrichtung für eine Tür oder ein Fenster
EP1749955A1 (fr) * 2005-08-03 2007-02-07 S.A.A.A. Sas Systemes D'automatismes D'alarmes Automatiques Détecteur lasso verrouillable pour système antivol
CN115021176A (zh) * 2022-07-07 2022-09-06 中航天建设工程集团有限公司 一种智能电缆挂钩

Also Published As

Publication number Publication date
GB8904730D0 (en) 1989-04-12

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Effective date: 19910306