Pocket-sized, direct-reading ultrasonic thickness gauge

Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Content or effect of a constituent of a liquid mixture

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G01N 2900

Patent

active

040331768

ABSTRACT:
This invention relates to a method and apparatus for measuring the time interval between two or more sequential signals. One particular application is measuring the time interval between pulses in non-destructive ultrasonic testing. A time-variable gate is used to effectually span the time interval between signals, the interval of the gate corresponding to the time interval between signals.

REFERENCES:
patent: 2562450 (1951-07-01), DeLano, Jr.
patent: 3238767 (1966-03-01), Clynes
patent: 3256733 (1966-06-01), Carlin
patent: 3262306 (1966-07-01), Henry
patent: 3427866 (1969-02-01), Weighart
patent: 3690154 (1972-09-01), Wells et al.
patent: 3748895 (1973-07-01), Kummer et al.

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