Device for measuring the speed of an object traveling between tw

Details Device for measuring the speed of an object traveling between tw Device for measuring the speed of an object traveling between tw

1979-06-01

1982-09-28

Strecker, Gerard R.

Electricity: measuring and testing

Electrical speed measuring

Including 'event' sensing means

364565, G01P 366, G01B 900

Patent

active

043520642

ABSTRACT:
A hand-held electronic instrument to be used for timing target vehicles. The instrument has the ability to determine a comparison time-speed number by multiplication of a known speed of a setup vehicle by the length of time the setup vehicle takes to travel between two selected fixed points. The instrument has a memory for storing a comparison time-speed number, a timer, a manually operated first-fixed-point switch, a manually operated second-fixed-point switch, a divide circuit and a speed readout display. The first-fixed-point switch is pressed to start the timer when a target vehicle passes the first fixed point. When the target vehicle passes the second fixed point the second-fixed-point switch is pressed which stops the timer, and causes the instrument to divide the comparison time speed number by the output of the timer and to display the resulting speed.

REFERENCES:
patent: 3530382 (1970-09-01), Liston et al.
patent: 4022014 (1977-05-01), Lowdenslager
patent: 4220996 (1980-09-01), Scarcy

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