Automotive security system
First Claim
1. Apparatus for deterring defeat of a multiple-position ignition switch of an automobile, the ignition switch adapted for turning successively through each of a plurality of positions in a predetermined sequence, each position enabling a respective one of a plurality of circuits in the automobile;
- the apparatus comprising;
means for receiving from a driver a numerical code;
means for matching the numerical code to a preset code and communicating a match signal indicative of a match; and
control means having a plurality of inputs each receiving from a respective one of a plurality of positions of a multiple-position automobile ignition switch a switch signal indicative of the position, and further having an output for providing a signal for enabling a circuit necessary for operation of the automobile;
wherein the control means includes means for generating the signal for enabling the circuit necessary for operation of the automobile in response to receiving the match signal and receiving the plurality of switch signals in a predetermined sequence, indicating that the switch signals are being produced by turning of the ignition switch through each of the plurality of positions in a predetermined sequence.
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Accused Products
Abstract
An anti-theft system for an automobile includes a microprocessor-based control module that enables operation of solenoids for the power circuits of the car only if a proper identification code is entered by a data entry device and the automobile'"'"'s ignition switch is sequenced through its positions. The anti-theft device further includes operating a serial switch placed in a critical electrical circuit for the engine, and data communications capability with electronic controls for the engine and other systems on the automobile so as to limit or to disable their function.
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Citations
21 Claims
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1. Apparatus for deterring defeat of a multiple-position ignition switch of an automobile, the ignition switch adapted for turning successively through each of a plurality of positions in a predetermined sequence, each position enabling a respective one of a plurality of circuits in the automobile;
- the apparatus comprising;
means for receiving from a driver a numerical code; means for matching the numerical code to a preset code and communicating a match signal indicative of a match; and control means having a plurality of inputs each receiving from a respective one of a plurality of positions of a multiple-position automobile ignition switch a switch signal indicative of the position, and further having an output for providing a signal for enabling a circuit necessary for operation of the automobile; wherein the control means includes means for generating the signal for enabling the circuit necessary for operation of the automobile in response to receiving the match signal and receiving the plurality of switch signals in a predetermined sequence, indicating that the switch signals are being produced by turning of the ignition switch through each of the plurality of positions in a predetermined sequence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- the apparatus comprising;
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11. Apparatus for deterring defeat of a multiple-position ignition switch of an automobile comprising:
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an automobile having a plurality of circuits, each circuit including means for completing the circuit in response to receiving a control signal; a multi-position ignition switch for turning successively through each of a plurality of positions corresponding to each of the automobile circuits in a predetermined sequence, the ignition switch, when turned to each position, asserting a switch signal for enabling completion of the corresponding one of the plurality of circuits; means for receiving from a driver a numerical code; means for matching the numerical code to a preset code and communicating a match signal indicative of a match; and control means having a plurality of inputs, each input receiving from a different one of the plurality of positions the respective switch signal, and further having an output for sending a control signal for enabling one of the plurality of circuits necessary for operation of the automobile; wherein the control means includes means for generating the control signal only in response first to receiving the match signal and then to receiving at its respective inputs each of the plurality of switch signals in a predetermined sequence, indicating that the switch signals are being asserted by turning of the ignition switch through each of the plurality of positions in a predetermined sequence. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. Apparatus for deterring defeat of a multiple-position ignition switch of an automobile the automobile including a multi-position ignition switch for turning successively through each of a plurality of positions corresponding to each of a plurality of automobile circuits in a predetermined sequence, the positions including "off," "accessory," "on" and "start," the switch in each position generating a predetermined switch signal;
- the apparatus comprising;
means for receiving from a driver a numerical code; means for matching the numerical code to a preset code and communicating a match signal indicative of a match; and control means having a plurality of inputs corresponding to each position of the automobile'"'"'s ignition switch, each input receiving, respectively, a signal switch indicating "off," "accessory," "on" and "start" positions of the ignition switch;
the control means further having an output for sending a control signal for enabling a circuit necessary for operation of the automobile;wherein the control means includes means for generating the control signal in response first to receiving the match signal and subsequently detecting at its respective inputs assertion of the switch signals in a predetermined sequence as follows;
first, "off" is asserted and all other switch signals are unasserted;
second, "accessories" is asserted and all other switch signals are unasserted;
third, "accessories" and "on" are asserted and "off" and "start" switch signals are unasserted; and
fourth, "accessories," "on" and "start" are asserted and "off" is unasserted.
- the apparatus comprising;
Specification