Geometrical instruments – Area integrators – Electrical
Patent
1974-08-28
1976-02-24
Aegerter, Richard E.
Geometrical instruments
Area integrators
Electrical
33178E, 33174L, G01B 728
Patent
active
039395677
ABSTRACT:
A method and apparatus for the measurement of the distance between two points along a circular arc having an unknown radius in which there is a measuring signal generated responsive to the distance between the two points along a straight line passing through them and a measurement of the bending radius of the arc effected on the basis of the distance of a third point on the arc from a straight line joining a fourth and fifth point on the arc. The apparatus includes a support for the arc of the material being measured, a first measuring head for measuring the distance along a straight line between the ends of the arc, a second measuring head provided with at least three feelers with one of the feelers being mobile with regard to the other two, for detecting the arc bending and a processing and indicating unit connected with the first and second measuring heads to determine the longitudinal development.
REFERENCES:
patent: 979248 (1910-12-01), Ayers
patent: 1417703 (1922-05-01), Waffenschmidt
patent: 2369909 (1945-02-01), Mestas
patent: 3221544 (1965-12-01), Gunkel
patent: 3420222 (1969-01-01), Noe et al.
patent: 3479744 (1969-11-01), Howland et al.
american Machinist, Dec. 2, 1948, p. 105, "Vernier Caliper Measures Radii of Partial Sections," by Clifford Bower.
Aegerter Richard E.
Finike Italiana Marposs, Soc. In Accomandita Semplice di Mario P
Thaler Michael H.
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