Measuring and testing – Dynamometers – Responsive to force
Patent
1988-06-13
1989-10-31
Orsino, Joseph A.
Measuring and testing
Dynamometers
Responsive to force
7386247, G01L 506
Patent
active
048769002
ABSTRACT:
An improved tennis racket string tension tester of enhanced accuracy and convenient adaptability to rackets of varying configuration and string spacing. To provide for strings of varying diameter and grid spacing, a series of interchangeable washers are provided which exactly fit a centrally disposed interstice and a string grid defined by two horizontal and two transversely extending strings. Deflection of a known type strain gauge is indicated by a liquid crystal readout.
REFERENCES:
patent: 4590808 (1986-05-01), Lightfoot et al.
patent: 4794805 (1989-01-01), Carney et al.
Carney Donald P.
Carney William P.
Chen Hollis T.
Orsino Joseph A.
Temko Charles E.
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