Concentricity gage

Details Concentricity gage Concentricity gage

1982-01-07

1984-07-24

McGraw, Vincent P.

Optics: measuring and testing

With plural diverse test or art

324 61R, 356237, 425169, G01N 2189, G01R 2726, B29F 310

Patent

active

044615698

ABSTRACT:
A non-contact measuring apparatus for determining errors in concentricity between an elongated electrically conductive core such as a wire and an insulation coating thereon is disclosed. An optical scanning section produces an electrical signal proportional to the position of the coating at the same time that a capacitance section produces an electrical signal proportional to the position of the core. A comparator compares the two signals to yield a difference or error signal proportional to the error of concentricity and the result is continuously displayed to show the axis and magnitude of the error.

REFERENCES:
patent: 3748577 (1973-07-01), Jones, Jr.
patent: 4086044 (1978-04-01), Sikora
patent: 4086528 (1978-04-01), Walton
patent: 4395119 (1983-07-01), Nakata et al.

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