Caliper for applying constant pressure to an object being measur

Details Caliper for applying constant pressure to an object being measur Caliper for applying constant pressure to an object being measur

1980-04-17

1982-02-16

Haroian, Harry N.

Geometrical instruments

Area integrators

Electrical

G01B 500

Patent

active

043153720

ABSTRACT:
A constant pressure caliper commonly used to measure the thickness of skin folds and wherein the caliper arms are separated by the actuation of a slide mechanism and are urged together by a constant force spring acting through a linkage that applies a constant force to the caliper arms regardless of the distance the arms are opened. The caliper arms are pivotally connected in a housing such that the lever arm of the force for closing the arms and the lever arm through which the constant tension spring is acting vary proportionally to maintain the closing force constant as the arms are separated different distances.

REFERENCES:
patent: 1320320 (1919-10-01), Crowley
patent: 1630505 (1927-05-01), Walther
patent: 2559170 (1951-07-01), Pickett
patent: 3008239 (1961-11-01), Lange
patent: 3140546 (1964-07-01), Bartlett
The Lancet: "Forceps for the Measurement of Skin-fold Thickness" 10/29/1960 p. 962.

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