Measuring and testing – Hardness – By penetrator or indentor
Patent
1997-02-11
1998-11-17
Noland, Thomas P.
Measuring and testing
Hardness
By penetrator or indentor
73818, 73860, G01N 342, G01N 348, G01N 368
Patent
active
058378898
ABSTRACT:
A pressure gauge for tennis balls and the like, comprising a rigid clamp arm pivotally connected to a flexible clamp arm for squeezing a ball between them. The rigid clamp arm has a socket for holding the ball. The flexible clamp arm preferably has a probe which extends into the socket and depresses the ball when said two clamp arms are rotated toward each other in a clamping action. A pointer arm is journalled to the fulcrum of the clamp arms and is attached to the flexible clamp arm near the fulcrum with a screw, which can be loosened for calibration. A scale adjacent the free end of the pointer indicates the pointer displacement when the two clamp arms are pivoted together. The pointer provides high sensitivity to distinguish small differences in ball pressure.
REFERENCES:
patent: 1376413 (1921-05-01), Fairholme et al.
patent: 1771858 (1930-07-01), Mohr
patent: 2278416 (1942-04-01), Atti
patent: 2626522 (1953-01-01), Brown
patent: 2628496 (1953-02-01), Wick
patent: 3138951 (1964-06-01), Scott
patent: 3376734 (1968-04-01), Ether
patent: 4136554 (1979-01-01), Larson
patent: 4590808 (1986-05-01), Lightfoot et al.
patent: 5222391 (1993-06-01), Reenstra
patent: 5291774 (1994-03-01), Putnam
patent: 5511410 (1996-04-01), Sherts
patent: 5567870 (1996-10-01), Harris
patent: 5639969 (1997-06-01), D'Adamo
Patent Abstracts of Europe "Test device for a tennis ball" (DE 03627359A1) Feb. 18, 1988 Ingo Kern et al.
Patent Abstracts of Japan "Measuring Method for Internal Pressure of Tennis Ball" (O6-229864) Aug. 19, 1994 Yoshiyuki Hirocke et al.
Noland Thomas P.
Stewart John V.
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