Speed limit passing indicator

Details Speed limit passing indicator Speed limit passing indicator

1975-05-19

1976-12-14

Waring, Alvin H.

Communications: electrical

Selective

Having indication or alarm

340263, 328140, 307 10R, 180106, B60Q 154

Patent

active

039978699

ABSTRACT:
A speed limit system providing a passing of a given limit is disclosed. The speed-limit indicator comprises a frequency-voltage converter receiving at its input a signal which is produced by a sensor indicative of vehicle speed. A detection circuit comprising a frequency-voltage converter and a comparator followed by a gate circuit and signaling means are provided. The comparator utilizes the output of the voltage from the converter and a reference voltage which represents the speed limit. The gate circuit is interposed between the output of the comparator and the signaling means. A control signal is provided to the gate circuit, and in accordance with the state of that control signal, the gate circuit transmits or blocks the output signal of the comparator to the signaling means.

REFERENCES:
patent: 3597730 (1971-08-01), McClellan, Sr. et al.
patent: 3794972 (1974-02-01), Van Ostrom

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