Vehicle speed alarm

Claim 1

A vehicle speed alarm for use in a vehicle comprising: receiver means for receiving any of a plurality of transmitted signals originating outside said vehicle, each of said transmitted signals containing individualized frequency information corresponding to a different pre-established maximum vehicular speed; a plurality of filter means, each being tuned to a different frequency, for producing a filtered signal upon receipt of a transmitted signal having frequency information corresponding to the frequency to which said filter means are tuned; convertor means, coupled to said plurality of filter means for producing a predetermined strength signal upon receipt of said filtered signal; OR gate means coupled to said convertor means, for producing a reference signal upon receipt of any predetermined strength signal from said convertor means; generator means for producing a signal corresponding to the instantaneous speed of said vehicle; calibration means, coupled to said generator means, for producing a speed signal compatible, for comparison purposes, with said reference signal; and comparator means having a first input coupled to said OR gate means for receiving said reference signal, and a second input coupled to said calibration means for receiving said speed signal; said comparator producing a control signal only when said speed signal exceeds said reference signal, whereby the presence of said control signal indicates that the instantaneous speed of said vehicle exceeds said pre-established maximum vehicular speed.