Method of discriminating kinds of golf balls

Details Method of discriminating kinds of golf balls Method of discriminating kinds of golf balls

1979-10-31

1981-09-15

Kreitman, Stephen A.

Measuring and testing

Vibration

By mechanical waves

273213, G01N 2900

Patent

active

042890322

ABSTRACT:
A method of discriminating solid golf balls from thread-wound golf balls which includes the steps of holding the golf ball to be discriminated between a transmitter coupled to an ultrasonic wave oscillator and a receiver coupled to an ultrasonic detector for detecting the ultrasonic wave received by the receiver, applying from the transmitter, the ultrasonic wave having a frequency which can propagate through the solid golf ball, but can not propagate therethrough, to the golf ball to be discriminated, and detecting presence of the ultrasonic wave reaching the receiver through the golf ball to be discriminated by the ultrasonic wave detector.

REFERENCES:
patent: 2175685 (1939-10-01), Dieterich
patent: 2667063 (1954-01-01), Cunningham, Jr.
patent: 4147064 (1979-04-01), Bond
H. J. McSkimin et al., "Water Immersion Tech. Measuring Attenuation and Phase Velocity of Longitudinal Waves in Plastics", J. Acous. Soc. Am., vol. 49, No. 3, (Part 2), pp. 713-722, Mar. 1971.

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