Abstract: A security system for monitoring a protected area and sounding an alarm including a plurality of sensors arranged about a protected area for sensing incoming threat, device for generating at least one pulse for each sensor activated by the incoming threat to the area, an alarm controller for receipt of the pulses and sounding of an alert, and a single wire connecting outputs of the sensors to the controller for transmitting the pulses generated by the plurality of sensors to the controller.

Abstract: A vehicle security system and methods for triggering alarms, including a controller responsive to entry of a security code via the keypad which matches a particular security code to disengage an starter blocking relay. The controller is further responsive to determining that the ignition switch is turned to the "on" position without prior entry of a matching security code to start a timer which times out after a predetermined period of time, whereby in response to non-entry of a matching security code before expiration of the predetermined period of time, the controller generates an alarm signal for transmission via the wireless transceiver to a central monitoring station. If the controller determines that the ignition switch is turned to its off position after the timer is started, it disengages the starter blocking relay so as to enable ignition of the vehicle.

Abstract: A car radio with an electronic anti-theft device, which device includes circuitry for electrically detecting the removal of the car radio from its build-in recess, and by which the function of the car radio is blocked as long as the anti-theft device is not deactivated after the removal. A simple arrangement with a highly reliable mode of operation is obtained in that the circuitry for electrically detecting the removal of the car radio includes a monitoring circuit, by which the presence of a connection from the car radio to at least one loudspeaker is monitored continuously, and by which the anti-theft device is activated immediately after the interruption of this connection.

Abstract: An alarm operation is activated by closing all vehicle doors (S11). When all doors are locked (S12), an active alarm awaiting state is set (S13) and, when all doors are not locked (S12), a passive alarm awaiting state is set (S16). When all the doors are locked after a passive alarm awaiting state was set (S17), the passive alarm awaiting state shifts to an active alarm awaiting state. Then, whether or not all doors are unlocked is judged (S14). If they are unlocked, the alarm awaiting state is released (S15). If the alarm mode is preserved intact, without shifting to be in an active alarm mode, the alarm awaiting state is released (S15) by turning on an ignition or accessory switch within fifteen seconds after a door was opened (S18).

Abstract: An electronic ignition and alarm system for motorcycles. An electronic circuit for reading a coded signal emitted by a code-generating integrated circuit inside the ignition key, can be connected inductively or by electric contact means to a microcontroller programmed to enabling the operation of the ignition circuit of the engine after identification of the coded-signal. The coded-signal reader and the microcontroller are fed by a power source comprising a capacitor for storing the energy supplied by the voltage generator of the ignition circuit of the motorcycle.

Abstract: An add-on, or after-market, remote-control vehicle security system expander allows auxiliary remote-control functions to be added to previously-installed remote-control systems. Using complementary remote control functions for multiple actuation encoding permits auxiliary function codes to be transmitted without a change of state in the underlying function. Signal validation by coincidence timing and voltage comparison are used to prevent inadvertent local actuation of the auxiliary remote-control functions. Decoding is also limited to a time-window to reduce electrical interference.

Abstract: An electrical anti-theft security system for a motor vehicle includes an immobilising device for inhibiting power supply to the starter of the vehicle so long as the motor, incorporated in the anti-theft system and arranged to drive a blocking member, such as a steering lock, has not reached the unlocked position. The immobilising device is also arranged to prevent the system from being locked unless the vehicle is at rest.

Abstract: An antitheft system installed on a motor vehicle has an electronic control unit connected to a localization information detector and to a telephone apparatus, so that the control unit can produce a voice message and then transmit it directly to the police and/or to a security organization by means of the telephone apparatus, when a plurality of sensors detect certain conditions such as the theft of the vehicle. The message may also be sent by the system to a person authorized to use the motor vehicle by means of a transmitter-receiver radio and a portable transceiver radio. Voice messages are contained in a first mass memory unit, localization information derived from a second mass memory unit, the message selected on the basis of satellite signals received and decoded by the system.

Abstract: A security system for monitoring a protected area and sounding an alarm including a plurality of sensors arranged about a protected area for sensing incoming threat, device for generating at least one pulse for each sensor activated by the incoming threat to the area, an alarm controller for receipt of the pulses and sounding of an alert, and a single wire connecting outputs of the sensors to the controller for transmitting the pulses generated by the plurality of sensors to the controller.

Abstract: In a vehicle alarm system, as one feature circuitry is provided which can be attached to detect an input from a door pin input switch, and which can detect the opening and closing of the door if the door pin input switch is either a positively triggered pin switch or a negatively triggered pin switch. Furthermore, a specific structure of a piezoelectric disk sensor and detecting circuitry associated therewith is provided. The piezoelectric disk sensor has a weight mounted off a central axis at a distance of approximately a radius of the piezoelectric disk from a rigid mounting area. The associated circuitry evaluates all information from a shock sensing signal detected by the piezoelectric disk sensor.

Abstract: An alarm device of an anti-theft system for a vehicle is composed of a microcomputer ordinary connected by a power-supply wire to a vehicle battery, an electric-sound-generator driven by the microcomputer, a wire-disconnection-detecting-circuit for detecting disconnection of the power-supply-wire of the alarm device from a vehicle battery, an integrated auxiliary battery connected to the microcomputer and the sound-generator, a transistor for cutting power supply to the microcomputer from the auxiliary battery when the anti-theft system is not on the watch, sensors for detecting access to the vehicle compartment and an outside controller connected to the sensors to turn on the transistor when the system is on the watch and turns off the transistor when the system is not on the watch. If the access to the vehicle compartment or wire-disconnection is detected while the anti-theft system is on the watch, the microcomputer drives the sound-generator to give the alarm.

Abstract: A vehicle security device of the present invention comprising of a remote control, a receiver/decoder section, a CPU, and an amplifying section. It has been designed to arm in two ways--by remote control, and by timer. By pressing the button #1 of the remote control, the vehicle security device will be armed. The vehicle security device has two separate counters--the 10 minute counter, and the 30 second counter. No matter doors are close or open, the 10 minute counter will start counting after turning off ignition and will continue counting even if a door is opened while the 30 second counter will only start counting if any door of the car is opened and closed (provided all the remaining doors are close) but will stop counting if any door of the car is opened. The vehicle security device will arm itself if any of the two counters finished counting (whichever finished first). However, if the ignition is turned on during countdown, the car can be started and both counters will stop counting.

Abstract: A vehicular automatic occupant sensing anti-carjacking system primarily designed to automatically and continuously protect a vehicle from carjacking and to provide preventive protection to the authorized occupant of the vehicle from being taken hostage in their own vehicle and to facilitate the recovery of a vehicle during a carjacking regardless, whether the vehicle is occupied or unoccupied, regardless, whether the vehicle is attended or unattended, regardless, whether the ignition is on or off and regardless, whether the engine is running or not running. The system includes an electronic Command Control Unit which communicates with a plurality of sensors to provide the necessary input signals to the command control unit. The system has a means for automatically monitoring and determining the occupancy status of the vehicle via pre-programed occupancy status instructions.

Abstract: This data communication system employing carrier currents comprises a power supply (4), to which are connected supply lines (2, 3) to which supply lines are connected functional devices (6) of the vehicle communicating with one another. These functional devices (6) comprise a communication interface (10) and an associated application equipment (12) communicating with other functional devices (6) through its communication interface (10), the communication interface (10) comprising means for testing the validation of at least one predetermined criterion and means commanding control means of the power supply of the associated application equipment (12) for commanding, as a function of the validation of the predetermined criterion, the feeding or otherwise of the associated application equipment (12) by the supply lines (2, 3).

Abstract: An anti-hijack security system which automatically protects the vehicle with anti-hijack after the ignition has been turned off for a predetermined long period of time or after the ignition has been turned off and a door has been opened and closed for a predetermined short period of time. Thus, ensuring the owner to have anti-hijack protection when he returns to his vehicle. The anti-hijack protection system also makes sure that, once triggered, it will perform the anti-hijack trigger sequence even if a door sensing device is damaged or if a door is not closed properly. The system also makes sure that once anti-hijack trigger sequence is in it's last few stages, it cannot be disarmed by simply pressing the arm/disarm switch but can only be disarmed by entering a security code.

Abstract: An anti-hijack system which includes a nozzle arranged to be normally hidden from view mounted on the front section of a vehicle in the window well of the front windshield in such manner that the spray therefrom will impinge upon a person outside the vehicle and in the vicinity of the driver's door. As an alternative this can also be for both the driver's side and the passenger's side. The nozzle includes a diverter positioned to provide both cone and flat patterns of spray according to the arrangement thereof, and a spiral fluid director is positioned to effect the fluid spray as it ejects from the nozzle. There is a reservoir of incapacitating fluid adapted for mounting on a vehicle and hidden from view and a pump for forcing fluid from the reservoir through the nozzle under pressure to spray the fluid outwardly of the nozzle. If desired, a hot cap type capacitor can be used to provide voltage regulation so that vehicle voltage is always available for energizing the pump.

Abstract: A removable security device for a vehicle is provided, having at least one portion adapted to be inserted into a cigar/cigarette lighter of the vehicle. A terminal receives power produced by an external power supply, and a signal modifier modifies a characteristic of the power produced by the external power supply to produce a verification signal. A reader detects a presence of the verification signal, and an enabler enables the vehicle to be driven when the presence of the verification signal is detected.

Abstract: A security system or preventing unauthorized removal of a vehicle accessory such as a radio from a mounted position on the vehicle comprises a dispensing container containing a pressurized protective material such as a pepper gas and having a dispensing valve displaceable from a closed position to an open position in which the protective material is dispensed from the container. A valve actuating member is responsive to displacement of the accessory from its mounted position to displace the dispensing valve from the closed to the open position whereby the protective material is dispensed from the container.

Abstract: If agreement between an identification code transmitted from a transmitter 111 installed in a door key 11 and a predetermined identification code is detected in an immobilizing ECU 12, a variable code including a predetermined key word is transmitted from the immobilizing ECU 12 to an engine ECU 13, and the variable code is decoded in the engine ECU 13. If the decoded key word does not agree with the predetermined key word, the starting of the engine is inhibited.According to another aspect of this invention, a variable code is transmitted from the engine ECU 13 to the immobilizing ECU 12, a returning variable code is calculated based on a predetermined key function in the immobilizing ECU 12, and it returns to the engine ECU 13. If an agreement with returned variable code and a reference variable code determined in the engine ECU 13 is detected for the predetermined period, the starting of the engine is inhibited.

Abstract: When a key is inserted into a key cylinder and a key insertion switch switches from an open state to a closed state, a signal is provided to a main relay controller. This main relay controller provides a low level signal to a base of a first transistor to actuate a coil. Therefore, a contact point is closed and power is supplied to an anti-theft controller and an engine controller. Thus, these controllers do not consume power until the key insertion switch is closed and thus, their construction can be made simple since there is no need to operate them in a sleep mode.

Abstract: The present invention relates to an auxiliary control circuit for vehicle lights with a theft prevention function. The control circuit comprises a transmitter, a receiver, a CPU, an acoustic pickup, and actuating circuits. The CPU receives signals from loads such as hazard lights, brake lights, door locks and enters into preset functions such as a theft prevention function, a brake warning function, and a hazard light warning function.

Abstract: An electrical anti-theft security system for a motor vehicle includes an anti-theft security switch for controlling starting of the engine of the vehicle and for the supply of power to various electrical circuits of the vehicle. This anti-theft switch comprises a key interruptor and a multiple position control interruptor for controlling, in sequence, the power supply to various electrical circuits of the vehicle, including those for the ignition and the starter. The system also includes interruptors for the power supply of the electric motor of the anti-theft system, together with an immobilizing device for preventing the supply of power to at least one electrical circuit of the vehicle when the anti-theft system is not in its unlocked condition.

Abstract: A car security system capable of sending out an alarm when a car door is opened by an unauthorized person comprises a power stabilizing circuit for providing working DC power for the security system, a signal amplifying circuit for detecting small voltage change signals in the car battery and for generating therefrom an amplified signal, an alarm circuit including a buzzer and a controlling transistor, a microprocessor for receiving and then evaluating the amplified signal. In operation, when a car door is opened, a voltage change signal is produced, which is then detected for evaluating whether the opening of car door is authorized. If a voltage change signal is detected during conditions other than the car door opening, it is identified as a false alarm.

Abstract: An engine control system in which control of an engine can be performed after there has been a momentary power disconnection of a power supply, such as the vechicle battery, from an engine control unit of an electronic circuit which executes an anti-theft function. A power supply detecting circuit detect a connecting of the power supply to the engine control unit. A further circuit determines on the basis of the vehicle speed and the RPM whether or not the vehicle is running. When a connecting of the power supply to the engine control unit is dectected, a determination is made whether or not the power supply connecting has occured after a preceding momentary power disconnection if the further circuit determines that the vehicle is running. The anit-theft function of the electronic circuit is disable when it is determined that there has been a preceding momentary power desconnection.

Abstract: A glazing unit security system has an electrically conductive strip of polymeric material self-adhered to the surface of a tempered glass pane. Security means electrically connected to the conductive strip senses and responds to a loss of electrical continuity of the conductive strip. The conductive strip is non-self-integral, such that it would not survive with electrical continuity a fracture of the underlying glass panel. Since a fracture of the tempered glass panel will result in overall fracturing of the panel, it would cause loss of electrical continuity of the conductive strip. The security system further includes an alarm or other device responsive to a loss of electrical continuity of the conductive strip. When installed in a motor vehicle, the security system may include disabling means to prevent normal operation of the motor vehicle in response to loss of electrical continuity of a conductive strip.

Abstract: A control circuit for an automobile having an ignition switch with an ACC position and a start position, a starter motor, and an ignition coil which includes a pager circuit for receiving a digital signal from a telephone company resulting from a telephone call made thereto, a control code register connected with the pager circuit for storing the control codes from the pager circuit, a power circuit for supplying the electric power required by the control circuit, an alarm driving circuit, an activating circuit of an automobile door for receiving a signal from the control code register and activating the alarm driving circuit when the door is opened by an unauthorized person, a starter motor controlling circuit for turning off the starter motor when it receives an activating signal therefrom and when the ignition switch is in the ACC position and activating the alarm driving circuit when the ignition switch is in the start position, an ignition coil cut-off circuit for cutting off the ignition coil, and a cen

Abstract: A security system for preventing unauthorized removal of a vehicle accessory such as a radio from a mounted position on the vehicle comprises a dispensing container containing a pressurized protective material such as a pepper gas and having a dispensing valve displaceable from a closed position to an open position in which the protective material is dispensed from the container. A valve actuating member is responsive to displacement of the accessory from its mounted position to displace the dispensing valve from the closed to the open position whereby the protective material is dispensed from said container.

Abstract: An anti-theft protection system comprises a battery having a series of cells and at least one terminal. The series of cells and the at least one terminal have an electrical connection therebetween, which connection is subject to activation and deactivation. A mechanical contact device is positioned in the battery for physically connecting and disconnecting the series of cells and the at least one terminal for activating and deactivating the electrical connection. At least one of a control unit, an intruder alert system, and a battery load sensor is provided with the system. A control circuit is also provided for controlling the mechanical contact device to cause activation and deactivation of the electrical connection. The control circuit is adapted to receive at least one command signal from at least one of the control unit, the intruder alert system, and the battery load sensor.

Abstract: A display unit for presenting messages from a motor vehicle in which messages are selected for presentation based upon the number of interruptions in the power supplied to the display unit. A power supply provides power to an interrupter, which produces, within a first predetermined time frame, interruptions in the power. The power interruptions are sensed and counted, and a timer measures the first predetermined time frame in which the interruptions in the power occur. A message storage means is provided, in which is stored at least one message to be presented. A controller selects one of the stored messages for presentation, based on the number of interruptions sensed in the power and the first predetermined time frame during which the interruptions occurred, and the message is presented on a display panel. In a preferred embodiment the controller ceases the presentation of the message after a second predetermined time frame, which is most preferably about three seconds.

Abstract: A system (10) and method for monitoring usage of current immediately available from the traction batteries (12) of an electric vehicle includes a means (18) for generating a signal representative of the current being drawn from the batteries (12); a means (20) for generating a signal representative of the maximum current available from the batteries (12) for immediate use; and a means (22) responsive to the drawn-current signal and the maximum-available-current signal for generating a usage signal representing the ratio of drawn current to maximum-available current. A display, such as an analog meter (24) responsive to the usage signal and calibrated from zero-percent to one-hundred-percent available current usage, displays the transitory current usage as a percentage of maximum-available current.

Abstract: An automobile anti-theft device connected to the electrical system and fuel line of a vehicle. A control unit is positioned proximate to an operator of an automobile. The control unit has a first display and a key-pad for the generation of a personal access code for transmission to a circuit unit. The circuit unit includes a programmable read-only memory which compares the personal access code to a stored keyed access. The circuit unit generates a second signal upon acceptance of the personal access code by the programmable read-only memory. The second signal is received by a silicon control rectifier which opens a valve attached to the fuel line of an automobile permitting fuel passage to the engine. The control unit includes a locked retractable penetrating adapter which may be retrieved for modification of the stored key access within the programmable read-only memory.

Abstract: An automobile onboard television system by which a normal television picture is displayed only when the automobile is stopped, as a safety feature. An image display condition of the television is switched over in response to an image display switching signal from a microcomputer. Information as to setting of the automobile parking brake, information about the accessory input in the automobile, and information indicating a time-out of a timer circuit are supplied to the microcomputer. The microcomputer determines the logical product of this information, to supply an image display switching signal for displaying a normal picture on the television only when particular logical products are output. The driver is therefore kept from watching the television while driving, and hence from driving carelessly.

Abstract: A fault tolerant automotive serial communication network includes a central communication node directly connected to a plurality of automotive electronic devices through corresponding interface circuitry including fault tolerant circuitry for detecting a serial communication fault in the corresponding device and for rapidly and substantially unintrusively removing the device from the network for the duration of the detected fault to minimize the impact of the fault on network operation.

Abstract: An antitheft apparatus for an automotive vehicle comprises: a transponder (1) buried in an ignition key to store an ID number thereof; a receive unit (2) to receive the ID number of the ignition key inserted into the ignition key cylinder; an immobilizer unit (3) for outputting an engine start enable signal when the received ID number matches one of the stored ID numbers and not outputting the engine start enable signal when does not match; and an engine control unit (5) for enabling an engine drive in response to the reception of the engine start enable signal but disabling the engine drive in response to no reception of the engine start enable signal. In particular, the engine drive unit (5) keeps the immobilizer unit (3) inoperative for a predetermined time duration when the engine cranking operation is detected and allows the immobilizer unit (3) to be operative after the predetermined time has elapsed.

Abstract: A protective device for a lighting system to be used for a motor vehicle constituting a power supply and a light source energized with the power from the power supply. The power to be supplied to the light source is controlled by a driver. The driver is input with either a signal from a PWM pulse generator or a signal from a fixed duty pulse generator for the control of power to be supplied to the light source, and the changeover of these pulse generators is operated based on a detection signal from a voltage detector which monitors the voltage of the power supply.

Abstract: The present invention relates to a device for shutting off an engine remotely and sounding off an alarm locally and which includes an alarm motor, a module for activating the alarm motor, a key switch for turning the module on and off, a siren connected to the alarm motor, and a battery with an alternator terminal.

Abstract: Apparatus for use in thwarting an attempted hijacking of a vehicle utilizes a fluid chemical agent which irritates living human tissue upon contact. The fluid is contained in a reservoir, and is flowed under pressure to spray nozzles via tubes. The nozzles are located relative to the vehicle to spray the agent onto a hijacker so as to produce discomfort and disorientation. An automatic actuation system sprays fluid out of the nozzles when the system is enabled, the vehicle is running, and one of the vehicle's windows has been broken. Agent may also be sprayed by manually actuating an override switch into an energized position.

Abstract: An anti-hijacking and anti-theft vehicle security protection system is designed to permit, in the anti-hijacker function, the hijacker to drive off with the vehicle but within about two minutes the engine will be partially disabled to permit maneuvering the vehicle out of traffic to the side of the road. A few minutes later, the engine will be totally disabled and signalling devices can be activated. The system employs two overlapped timers under control of a sensor relay. A reset button under control of an authorized user can deenergize the sensor relay to return the system to normal. Also included within the design is anti-theft protection for an unattended vehicle which can be selected to function in any one of 3 conditions, one condition being the anti-hijacking function. In the second condition, operation of the vehicle is first partially disabled and then completely shut off. In the third condition, the vehicle cannot be started, and hazard lights and alarm are activated.

Abstract: A system of the present invention for signaling panic braking of a vehicle at or above a preset rate. The vehicle has a brake pedal movable from a nondepressed position to a depressed position for braking the vehicle. The nondepressed and depressed positions correspond to open and closed positions, respectively, of a brake light switch. The vehicle energizes at least one brake light when the brake light switch is in its closed position. The system of the invention includes a mercury switch for detecting a deceleration rate of the vehicle and generates a signal representative of panic braking when the deceleration rate of the vehicle reaches or exceeds the preset panic braking rate.

Abstract: A motor vehicle having an engine and drive train is protected by a security system including a sensor, a sequencer and an interrupter. The sensor can detect motion of the motor vehicle to provide a motion signal. The sequencer is coupled to the sensor and responds to the motion signal for providing a disable signal after production of the motion signal. The interrupter is coupled to the engine for disabling it in response to the disable signal. Thus the motor vehicle is disabled only after its motion is detected.

Abstract: A motor vehicle carjacking defense apparatus comprises a double pole switch which actuates at least one solenoid controlling at least one valve which interconnects a nozzle to a pump connected to a pressurized tank containing a non-toxic and non-corrosive irritant. The switch also overrides the vehicles electric window system, the alarm system, and the air flow system simultaneously sealing the windows and the air flow system and energizing the alarm system. Alternatively, the switch located inside the vehicle actuates an infrared heat detector connected to said solenoid wherein upon actuation of the detector, the detector energizes the solenoid from an electrical power supply. A plurality of nozzles and infrared heat detectors are arrayed around the vehicle whereby when the detector is armed it detects the presence of a carjacker and causes a spray of a pressurized, non-toxic and non-corrosive irritant and smoke towards the would-be carjacker.

Abstract: An anti-theft battery system for vehicles includes a control circuit which is connected in the starting circuit and responds to a starting current which exceeds a set point value to interrupt the starting circuit, thereby disconnecting the starter motor from the battery preventing starting of the vehicle, a reset circuit responsive to the control circuit which resets the control circuit after a delay interval to permit the starter motor to be connected to the vehicle battery, and an override circuit for generating an override signal for overriding the control circuit for a preselected interval of time to permit an authorized operator to start the vehicle, the override circuit including a small portable transmitter adapted to be carried by the vehicle operator and a receiver connected to the control circuit.

Abstract: A motorized vehicle anti-theft system which is passive by being automatically armed (i.e., does not require a vehicle occupant to set the system). Once power has been turned on to the vehicle, detection of an attempt to start the vehicle motor or the opening of a vehicle door starts a predetermined time cycle. If a first reset signal is not received before the end of the time cycle, a vehicle disabling circuit is set. After that, a detection of actuation of the vehicle brake will cause the disabling circuit to only permit the vehicle engine to operate properly near the engine idling speed, and set off an alarm. Only proper generation of the first and a second reset signal will allow the vehicle to be operated properly again.

Abstract: An alarm system for detecting glass breakage has a switch having an input terminal, output terminal, and control terminal. The input terminal is electrically connected to a power source such as a battery. An electrically conductive trace is formed on glass, and is electrically connected to the output terminal of the switch. A controller is electrically connected to the control terminal of the switch and controls the operation of the switch between conducting and non-conducting states. The controller measures and compares a reference output terminal voltage of said switching means while said switching means is in the conducting state, a second output terminal voltage while the switch is in the non-conducting state and a third output terminal voltage of the switch while the switching is in the conducting state. The controller generates a control signal in response to a comparison of said measured voltages.

Abstract: A new and improved automobile anti-theft switch is installed in series with ignition circuitry for the automobile. The apparatus includes a relay assembly which includes a relay-controlled switch. The relay-controlled switch is in series with the ignition circuitry for the automobile. A relay driver assembly is connected to the relay assembly and controls the relay-controlled switch. A timer assembly is connected to the relay driver assembly and controls operation of the relay driver assembly and the relay assembly. A disguised first switch assembly is connected to the timer assembly. When the disguised first switch assembly is in the closed state, it controls initialization of the timer assembly. On the other hand, when the disguised first switch assembly is moved to the open state, it permits discharge of the timer assembly.

Abstract: An antitheft system for use with a vehicle. The vehicle used with the system has a battery for providing a constant voltage source and a ground reference, and an electrically-controlled operational feature, wherein activation of the feature is necessary for operating the vehicle. The system includes a first harness connector with a plurality of contacts for connecting to a second harness connector having corresponding contacts. The second harness connector is connected to a security module having antitheft functions. The plurality of contacts of the first harness connector includes a first contact for connecting to circuitry in the vehicle for providing an activating signal to activate the operational feature. Also included is a second contact connected to a terminal of the electrically controlled operational feature, where the terminal is for receiving the activating signal to activate the operational feature.

Abstract: A solid state computer circuit system is provided that senses the state of the ignition switch, setting a lock out circuit to prevent the car from being started if a hidden switch (or other enabling circuit) is not activated. There is a solid state timing circuit locking out the ignition system automatically after a predetermined time when the ignition switch is turned off (typically thirty seconds). The system is actuated with a hidden switch (or an electronic device like a garage door opener or a digital key pad with an alarm circuit sounding an alarm if the wrong code is input or a foreign item is used in an effort to wrongfully enable the basic system circuit).

Abstract: A vehicle security system includes at least one sensor, a controller and at least one output device driver. The sensor has a rest state and a tripped state. The controller has an armed state and a disarmed state. The first output device driver transitions from its quiescent to its alarm state in response to the first sensor transitioning from its rest state to its trip state and the controller is in its armed state and furthermore when the ignition circuit is off. The first output device driver will remain in the quiescent state independently of the present state of the sensor if the ignition circuit is on and the controller is in its armed state. If the controller is in the disarm state, any activity by the sensor will not have any effect on the system.

Abstract: A vehicle security system has a combination lock type switch which controls engine starting and at least one other critical engine function; activates an alarm; and which causes an incapacitating substance, such as tear gas, to be introduced to the vehicle interior. The combination lock type switch controls appropriate solenoid valves and switches to accomplish the above purposes. This combination switch, a replenishing port, and a visible alarm are the only visible components. The remaining components are concealed behind the dashboard or beneath the floor of the vehicle.

Abstract: A microprocessor controlled automobile security system provides several features for enhanced operability. The system allows a receiving unit to learn a plurality of operating codes from a plurality of uniquely coded transmitters with which it can operate, thereby allowing each transmitting unit to be sold separately from each receiving unit. The system also allows for an operator to personally set the threshold at which a signal detected by a shock detector will result in an alarm being triggered. The system is further selectively operable in either a manual arming mode or a passive arming mode. The system also allows selective operation in either a full current sensing mode in which either a detected shock above an absolute threshold or a .DELTA. threshold, or current flow above a predetermined level, will trigger an alarm system or operation in a shock and current integration mode in which if a detected current exceeding a predetermined threshold and a shock above an absolute or .DELTA.