Method and apparatus for testing railroad wheels

Details Method and apparatus for testing railroad wheels Method and apparatus for testing railroad wheels

1976-10-18

1977-09-27

Queisser, Richard C.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Content or effect of a constituent of a liquid mixture

73 678S, G01N 2904

Patent

active

040502929

ABSTRACT:
An ultrasonic pulse-echo apparatus tests railroad wheels passing through a test zone by sending ultrasonic energy into the rim of the wheels. Sensing means are disposed to discern the type of wheel e.g. locomotive wheel or freight car wheel to be tested and provide a corresponding control signal which adjusts the sensitivity of the test apparatus. This arrangement causes the apparatus to be conditioned for registering relatively small defects in locomotive wheels, but passing over small defects in other wheels which are stressed to a lesser extent, e.g. freight car wheels. Hence, the sensitivity of the test apparatus is continuously responsive to the wheel category undergoing test.

REFERENCES:
patent: 3266300 (1966-08-01), Graboski
patent: 3349609 (1967-10-01), Ryzhov-Nikonov et al.
patent: 3367173 (1968-02-01), Uphoff
patent: 3596503 (1971-08-01), Gay et al.
patent: 3978712 (1976-09-01), Cowan et al.

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