Anti-theft ignition system
First Claim
1. In a system for a vehicle having a switch means which is key operable from a first position to a second position for energizing the electrical system of the motor means of said vehicle, the combination comprising:
- means for detecting momentary actuations of said switch means for generating serial pulses;
means operable in response to the last pulse of a number of sequentially entered pulses for indicating completion of a word;
means for providing a vehicle condition-sensing signal;
means for providing a plurality of words indicative of a given code;
means for enabling an electrical component of the vehicle for permitting the starting of the motor means; and
means responsive to said signal and to proper sequential entry of at least a portion of said plurality of words for setting said system for permitting subsequent energizing said enabling means only in response to proper sequential entry of all of said words for operating said motor means.
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Accused Products
Abstract
An anti-theft ignition system including a generally tamper-proof canister or housing substantially covering the solenoid of the starter motor with a portion thereof covering the ignition switch terminal of the solenoid. The housing includes a compartment for receiving electronic circuitry including an encoded circuit coupled to or forming a part of a microcomputer operable in response to proper sequential actuation of the ignition key for energizing a silicon controlled rectifier in series relation with the ignition switch.
95 Citations
44 Claims
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1. In a system for a vehicle having a switch means which is key operable from a first position to a second position for energizing the electrical system of the motor means of said vehicle, the combination comprising:
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means for detecting momentary actuations of said switch means for generating serial pulses; means operable in response to the last pulse of a number of sequentially entered pulses for indicating completion of a word; means for providing a vehicle condition-sensing signal; means for providing a plurality of words indicative of a given code; means for enabling an electrical component of the vehicle for permitting the starting of the motor means; and means responsive to said signal and to proper sequential entry of at least a portion of said plurality of words for setting said system for permitting subsequent energizing said enabling means only in response to proper sequential entry of all of said words for operating said motor means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. In an ignition system for a vehicle having a starter solenoid actuable through a terminal thereof connected for electrical conduction through an ignition switch operable from a first position to a second position for completing the circuit to said solenoid terminal, the combination comprising:
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a housing member configured for mating engagement with the solenoid housing and for substantially surrounding the switch terminal, said housing including a compartment; and electronic means within said compartment electrically coupled to said terminal and to the second position contact of said ignition switch for completing the circuit between said contact and said switch terminal only in response to a predetermined number of momentary actuations of said ignition switch to said contact in predetermined time relation indicative of a predetermined preset code within said electronic means. - View Dependent Claims (13, 14, 15, 16)
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17. In a system, the combination comprising:
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an electrically operable component; key-operated switch means operable from a first to a second position; means coupled to said system for providing a condition sensing signal; means for receiving a series of pulses generated by momentary actuation of said switch means from said first to said second position; means for providing a predetermined code having a plurality of words of information; means for detecting the timing of the pulses entered by said switch means for enabling said receiving means to distinguish between words; means coupled to said electrically operable component and operable only in response to entry of all of said words in proper sequence for energizing said electrically operable component; and means responsive to said condition sensing signal and to said receiving means receiving a predetermined number of said words for setting said means coupled to said electrically operable component. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 37)
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28. In an ignition system for a vehicle having motor means, the combination comprising:
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an electrically operable component coupled for enabling starting of said motor means; key-operated switch means operable from a first to a second position; a generally tamper-proof housing member configured for generally surrounding said component and for substantially surrounding an electrical terminal thereof, said housing including a compartment; electronic means within said compartment electrically coupled to said component terminal and to said switch means for completing the circuit between said component and a voltage source only in response to a predetermined number of momentary actuations of said switch means from said first to said second positions in predetermined relation indicative of a predetermined preset code within said electronic means. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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35. In an ignition system for a vehicle having motor means rotated by a starter motor having a solenoid electromechanically coupled thereto, the solenoid coil being actuable through a terminal thereof connected for operation through the battery of the vehicle in response to movement of an ignition means operable from a first position to a second position, the combination comprising:
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a housing member configured for generally surrounding the solenoid housing and for substantially surrounding the switch terminal thereof; means on said housing member for securing said housing member to a part of said motor means; a compartment within said housing member; electronic means within said compartment electrically coupled to said terminal and to said switch means for circuit completion in said second position, said electronic means including; code means operable only in response to a predetermined number of series of pulses in predetermined time relation, each series of pulses being indicative of a predetermined word; means coupled to said switch means for detecting the number and time relation of momentary actuations of said switch means from said first position to said second position; means coupling said detecting means to said code means; means coupled in circuit relation with said component for selectively completing the circuit thereto; and means operable in response to actuation of at least two of said code means for rendering said means in circuit relation with said component operable only in response to actuation of all of said code means. - View Dependent Claims (36, 38, 39, 40)
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41. In a key-operated system having a key actuable from a first position for momentary actuation, with a switch contact at a second position for normally energizing a system, the combination comprising:
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means for providing a digital code having a plurality of words; means for receiving a series of pulses from momentary actuation of said key to said second position; means responsive to the last of the so-entered pulse of said series of pulses for enabling said receiving means to distinguish between words; means for providing a condition sensing signal; means responsive to said signal and to said receiving means receiving a predetermined code for setting other means operable only in response to entry of all of said words in proper sequence for subsequent energization of said system. - View Dependent Claims (42, 43, 44)
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Specification