Digital electronic calibrator for tennis racket stringing machin

Details Digital electronic calibrator for tennis racket stringing machin Digital electronic calibrator for tennis racket stringing machin

1988-06-29

1989-09-12

Noland, Tom

Measuring and testing

Dynamometers

Responsive to force

7386248, 73828, 273 73A, G01L 510

Patent

active

048648752

ABSTRACT:
A device for checking the calibration of tennis racket stringing machines, having an input rod to which a non-stretch cable is attached for attaching to the tension head of a stringing machine, a force lever system attached to the input rod for receiving the tension exerted on the rod, a strain transducer attached to the force lever system for converting the stresses in the lever system to electrical energy, and a microprocessor for receiving the output of the transducer and converting the same to an identifiable tension value.

REFERENCES:
patent: 3964291 (1976-06-01), Ogden
patent: 4590808 (1986-05-01), Lightfoot et al.

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