Method and apparatus for adjusting the operating diameter of a p

Details Method and apparatus for adjusting the operating diameter of a p Method and apparatus for adjusting the operating diameter of a p

1994-03-23

1996-08-27

Snow, Walter E.

Electricity: measuring and testing

Magnetic

With compensation for test variable

324238, 324262, G01N 3700, G01N 2772, G01R 3312

Patent

active

055504680

ABSTRACT:
A method and apparatus for testing an elongate product for faults and defects, which comprises a rotatable testing head which permits the elongate product to be passed coaxially therethrough and which mounts a pair of testing probes so as to permit adjustment of their operating diameter. In order to automatically adjust the positions of the probes to accommodate elongate products of different sizes, there is provided an external adjustment unit, which stops the testing head in a predetermined angular position. The adjustment unit contains an external adjustment drive and when the rotation of the testing head has stopped, the external adjustment drive is advanced into operative engagement with the adjustable mounting of the testing probes. A measuring pin is also advanced into contact with the mounting of the testing probes so as to monitor the exact position of the probes, and during the repositioning of the probes a signal from the measuring pin is fed back to a control device to assure the precise positioning of the probes.

REFERENCES:
patent: 3612987 (1970-04-01), Placke et al.
patent: 4554496 (1985-11-01), Rudiche, Jr. et al.
patent: 4596953 (1986-06-01), Nagasaka et al.
patent: 4641532 (1987-02-01), Rohrer
patent: 5023550 (1991-06-01), Yamazaki et al.
patent: 5187435 (1993-02-01), Geweke
"Messwertgeber zur analogen and digitalen Winkel- und Wegmessung", TWK Inmation 14/85, pp. 6 & 7 (no translation).

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