Method and apparatus for determining tension and pressure

Details Method and apparatus for determining tension and pressure Method and apparatus for determining tension and pressure

1984-08-24

1986-05-27

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to force

73818, G01L 510

Patent

active

045908087

ABSTRACT:
A device and method for determining a tension factor in grids such as tennis rackets and the like, which have different sized string areas, the device including a frame structure defining a fixed, predetermined test area within a larger size racket string area and having a mechanism for relating two measurement components, a deflection component and a force component, an element for applying a first measurement component to the grid test area and an element for sensing the other component resulting from the application of the first component, and determining from the two components a tension factor in the strings forming the grid, the method including defining a predetermined test area within a larger grid area, applying one of two measurement components to a portion of the grid test area, determining the other component resulting from the application of the one component to the grid test area, and determining a tension factor in the strings forming the grid from the values of the two components; the apparatus also including a mechanism and method for determining the compressibility of balls such as tennis balls.

REFERENCES:
patent: 1630110 (1927-05-01), Cole
patent: 4055999 (1977-11-01), Cope
patent: 4245512 (1981-01-01), Saunders
patent: 4313289 (1982-02-01), Birdsong, Jr.

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