Measuring and testing – Volumetric content measuring
Patent
1977-01-10
1978-03-07
Ruehl, Charles A.
Measuring and testing
Volumetric content measuring
G01L 508
Patent
active
040772560
ABSTRACT:
A rounded abutment member is mounted for reciprocative sliding movement in the normal direction with respect to the center of the face of a stringed racket, and hydraulic means is provided for automatically measuring the pressure required for the movement of the abutment member in the racket face abutting direction through a predetermined distance, such measurement being an indication of overall face string tension.
REFERENCES:
patent: 1322123 (1919-11-01), Larson
patent: 3149489 (1964-09-01), Schmaeng
patent: 3194063 (1965-07-01), McKean
Ruehl Charles A.
Schmidt Ernest H.
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