Automotive continuous protection anti-theft system
First Claim
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1. A security device capable of integration with a self-propelled vehicle and operative to disrupt the propulsion of said vehicle, comprising:
- (a) a transmitter of limited range carried by the operator of said vehicle producing a coded broadcast signal pulse of selected frequency and duration, with a time delay of selected duration between pulses;
the transmitter comprising oscillator means, means to regulate power output, means to manually tune the oscillator means to a desired frequency, signal encoding means, plural diodes to pass an output signal to a pulse duration interface switch means for turning the transmitter on/off, the pulse duration interface switch means comprising timer means for supplying a square wave output, means for adjusting a time delay period, and LED means for visually indicating that the transmitter is actively transmitting;
(b) a receiver, located in the vehicle, receiving pulsed signals from the transmitter unit and converting those pulsed signals to a continuous signal;
the receiver comprising power regulation means, amplification means, LC filter means resonating at the transmitter frequency, receiver tuning means, demodulation means, and means for determining if a received encoded signal matches a transmitter signal;
(c) an interface unit, integrated with the vehicle propulsion system, disabling said vehicle propulsion system in the event a transmitted signal is not received from the transmitter after a predetermined time duration;
the interface unit comprising pulse detector processing means, and means for energizing and de-energizing a relay coil to enable and disable the vehicle'"'"'s electrical system.
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Abstract
An automotive security device of the type consisting of: (a) a portable unit and (b) a central unit. The portable unit consisting of a transmitter circuit and a pulse duration circuit being capable of transmitting specified signal pulses at periodic intervals over a limited distance. The central unit, which is mounted in the vehicle, consisting of a receiver circuit and an interface circuit being capable of receiving these signals and activating the vehicle electrical system upon receiving said signal and deactivating the vehicle electrical system upon the absence of said signal.
16 Citations
1 Claim
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1. A security device capable of integration with a self-propelled vehicle and operative to disrupt the propulsion of said vehicle, comprising:
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(a) a transmitter of limited range carried by the operator of said vehicle producing a coded broadcast signal pulse of selected frequency and duration, with a time delay of selected duration between pulses;
the transmitter comprising oscillator means, means to regulate power output, means to manually tune the oscillator means to a desired frequency, signal encoding means, plural diodes to pass an output signal to a pulse duration interface switch means for turning the transmitter on/off, the pulse duration interface switch means comprising timer means for supplying a square wave output, means for adjusting a time delay period, and LED means for visually indicating that the transmitter is actively transmitting;(b) a receiver, located in the vehicle, receiving pulsed signals from the transmitter unit and converting those pulsed signals to a continuous signal;
the receiver comprising power regulation means, amplification means, LC filter means resonating at the transmitter frequency, receiver tuning means, demodulation means, and means for determining if a received encoded signal matches a transmitter signal;(c) an interface unit, integrated with the vehicle propulsion system, disabling said vehicle propulsion system in the event a transmitted signal is not received from the transmitter after a predetermined time duration; the interface unit comprising pulse detector processing means, and means for energizing and de-energizing a relay coil to enable and disable the vehicle'"'"'s electrical system.
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Specification
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Current AssigneeBrian H. Twohig, Christopher J. Dortenzio
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Original AssigneeBrian H. Twohig, Christopher J. Dortenzio
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InventorsDortenzio, Christopher J., Twohig, Brian H.
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Primary Examiner(s)Swarthout, Brent
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Application NumberUS08/265,828Time in Patent Office477 DaysField of Search340/426, 340/430, 340/428, 340/429, 340/825.31, 340/825.72, 180/287, 307/10.2, 307/10.3US Class Current340/426.11CPC Class CodesB60R 25/04 operating on the propulsion...
