Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Content or effect of a constituent of a liquid mixture
Patent
1975-09-30
1977-01-18
Woodiel, Donald O.
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Content or effect of a constituent of a liquid mixture
G01N 2900
Patent
active
040032442
ABSTRACT:
An electrical circuit incorporated in a receiver circuit of an ultrasonic pulse-echo thickness and/or velocity measuring apparatus causes the entrant surface and rear wall responsive video signals to be of equal magnitude and in phase with each other. The provision of echo responsive video signals having equal amplitude and phase results in a measuring apparatus exhibiting improved accuracy while requiring fewer and less expensive circuit components.
REFERENCES:
patent: 2418538 (1947-04-01), Yetter
patent: 3048031 (1962-08-01), Beaujard et al.
patent: 3576126 (1971-04-01), Weighart
patent: 3690153 (1972-09-01), Matay
patent: 3774717 (1973-11-01), Chodorow
O'Brien Patrick M.
Pittaro Richard J.
Walker Philip A.
Feig Philip J.
Krautkramer-Branson Incorporated
Kreitman Stephen A.
Steinberg Ervin B.
Woodiel Donald O.
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