Standard surface assembly for calibrating a variable speed frict

Details Standard surface assembly for calibrating a variable speed frict Standard surface assembly for calibrating a variable speed frict

1978-09-26

1979-11-13

Woodiel, Donald O.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

73 8, 73 9, 73146, G01L 2500

Patent

active

041738853

ABSTRACT:
The present invention relates to a standard surface assembly that may be used in conjunction with a pendulum type variable speed friction skid tester for calibrating the same. The standard surface assembly includes a standard surface specimen, such as aluminum oxide, and, in use, is positioned below a pendulum swing arm with a rubber tire secured about the lower remote end thereof. The standard surface assembly is positioned with respect to the pendulum such that the rubber tire passes generally tangential to the upper surface thereof, and because the rubber tire is locked it will skid across the upper surface of the standard surface. For any particular swing of the pendulum arm, the energy lost in friction by the skidding wheel against the standard surface is known and consequently the variable speed friction tester can be calibrated to reflect this energy loss.

REFERENCES:
patent: 3721115 (1973-03-01), Kearns

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