Coating processes – Measuring – testing – or indicating – Thickness or uniformity of thickness determined
Patent
1991-09-16
1993-01-26
Padgett, Marianne
Coating processes
Measuring, testing, or indicating
Thickness or uniformity of thickness determined
427239, 427600, 427560, B05D 312, B05D 722
Patent
active
051821397
ABSTRACT:
A method for measuring the plating on the inside of a gun barrel, including he steps of providing ultrasonic pulses against a gun barrel to be plated, and plating the inside while monitoring the echoes from said waves from the inside and outside diameters of the barrel with a plurality of transducers aligned to reflect ultrasound waves from the outside and the inside surfaces of the gun barrel. Change in time for the return of waves from the inside surface indicates the change in thickness of plating on the inside of the barrel. The change is calculated by measuring the change in time for the wave to return to its source, and multiplying by the sound velocity.
REFERENCES:
patent: 4174410 (1979-11-01), Smith
patent: 4620984 (1986-11-01), Hoddinott
patent: 4702931 (1989-10-01), Falcoff
patent: 4800104 (1989-01-01), Cruickshank
Doxbeck Mark
Frankel Julius
Goldberg Edward
Lane Anthony T.
Padgett Marianne
Sachs Michael C.
The United States of America as represented by the Secretary of
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