Vehicle speed alarm

• US 4,229,727 A
• Filed: 04/23/1979
• Issued: 10/21/1980
• Est. Priority Date: 04/23/1979
• Status: Expired due to Term

• Current Assignee: Robert Gilhooley
• Original Assignee: Robert Gilhooley
• Inventors: Gilhooley, Robert
• Primary Examiner(s): Waring, Alvin H.
• Application Number:
  US06/032,532
• Time in Patent Office: 547 Days
• Field of Search: 340/53, 340/62, 340/670, 180/170, 180/171, 180/172, 455/68
• US Class Current: 340/905
• CPC Class Codes: B60Q 1/54 for indicating speed outside of the vehicle
• CPC Class Codes: G01P 1/103 by comparing the value of the measured signal with one or several reference values in general G01R17/00

Abstract

A vehicle speed alarm is used to alert a driver of a vehicle that the instantaneous speed thereof has exceeded a pre-established maximum vehicular speed. The speed alarm produces a reference signal upon receipt of a transmitted signal containing information corresponding to the pre-established maximum vehicle speed. This reference signal is compared with a speed signal which corresponds to the instantaneous speed of the vehicle. When the instantaneous speed of the vehicle exceeds the pre-established maximum speed, a control signal is developed to alert the driver of that condition.

Claims

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.

2. The vehicle speed alarm defined in claim 1 further includes alarm means, coupled to said comparator means, for producing sensory information upon receipt of said control signal.