Speed minder
OwnerSy Haeriinventor
Life of this patent
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Abstract
The present invention relates to a new and improved universal device for vehicles, especially motor vehicles which measures the speed of the vehicle and continuously displays the speed on a digital readout display located in the vicinity of the dashboard of said vehicle. A separate digital switch integrated into the circuitry of the device is used to pre-set a reference speed to a desired value. As the vehicle's actual speed exceeds this pre-set reference value, a buzzer sounds and/or the speed display flashes off and on to alert the driver that he has exceeded the pre-set speed. When the vehicle speed falls below the pre-set limit, the buzzer and flashing stops and the device acts as a regular digital speedometer. The device is adjustable, thus enabling it to be used on a wide variety of vehicles.
Claims19
A universal, digital speedometer and speed alarm system for vehicles which comprises:
- (A) means for generating a signal indicative of a vehicle's speed;
- (B) means for calibrating the signal generated in step (A) above;
- (C) display means for displaying the vehicle's actual speed;
- (D) means for pre-setting a reference speed for the vehicle;
- (E) a plurality of comparators responsive to both the vehicles actual speed and the vehicles pre-set reference speed;
- (F) an audio alarm responsive to an output signal from said comparators, wherein the audio alarm comprises a buzzer which sounds then stops and continues to repeat itself so long as the vehicle's actual speed exceeds the vehicle's pre-set, reference speed, the frequency of which increases per unit of time as the vehicle's actual speed increases in a linear progression above the pre-set reference speed;
- and
- (G) a visual alarm responsive to an output signal from said comparators.
A universal, digital speedometer and speed alarm system for vehicles which comprises:
- four magnets attached to a vehicle's drive shaft;
- a magnetic reed sensor connected to an electrical source and located in close proximity to the magnets wherein the magnetic reed sensor transmits a series of electrical pulses in response to the magnets as they rotate with the shaft of a moving vehicle;
- a debouncer to eliminate false signals from the reed sensor;
- a calibration unit for adjusting the frequency of the electrical pulses per unit of time emitted by the magnetic reed sensor;
- an internal clock and timing unit for said electrical impulses;
- a decimal counter to count the number of pulses transmitted by the reed sensor;
- a digital display driver responsive to a signal transmitted from the decimal counter, said digital display driver sending an electrical transmission to a digital display unit to provide a digital display of the vehicle's actual speed;
- a digital switch to provide a pre-set reference speed;
- and, a plurality of comparators responsive to signals of the actual speed and the pre-set speed of the vehicle, each of said comparators producing an output signal when the vehicle's actual speed exceeds the pre-set speed, said output signals activating an audio alarm and a visual alarm, wherein the audio alarm comprises a buzzer which sounds then stops and continues to repeat itself so long as the vehicle's actual speed exceeds the vehicle's pre-set, reference speed, the frequency of which increases per unit of time as the vehicle's actual speed increases in a linear progression above the pre-set reference speed.
A universal, digital speedometer for vehicles which comprises:
- four magnets attached to a vehicle's drive shaft;
- a magnetic reed sensor connected to an electrical source and located in close proximity to the magnets wherein the magnet reed sensor transmits a series of electrical pulses in response to the magnets as they rotate with the shaft of a moving vehicle;
- a debouncer to eliminate false signals from the reed sensor;
- a calibration unit for adjusting the frequency of the electrical pulses per unit of time emitted by the magnetic reed sensor;
- an internal clock and timing unit for said electrical impulses;
- a decimal counter to count the number of pulses transmitted by the reed sensor;
- and a digital display driver responsive to a signal transmitted from the decimal counter, said digital display driver sending an electrical transmission to a digital display unit to provide a digital display of the vehicle's actual speed;
- a digital switch to provide a pre-set reference speed;
- and, separate comparators responsive to signals fo the actual speed and the pre-set speed of the vehicle, each of said comparators producing an output signal when the vehicle's actual speed exceeds the pre-set speed, said output signals activating an audio alarm and a visual alarm;
- wherein the audio alarm comprises a buzzer which sounds then stops and continues to repeat itself so long as the vehicle's pre-set, reference speed, the frequency of which increases per unit of time as the vehicle's actual speed increases in a linear progression above the pre-set reference speed.
Dependencies are inferred from the claim text.