Seam tracker

Details Seam tracker Seam tracker

1984-02-27

1985-04-16

Shaw, Clifford C.

Electric heating

Metal heating

By arc

228 45, 318575, B23K 912

Patent

active

045117853

ABSTRACT:
A seam tracker in which a shaft containing a position-indicator-member, e.g., a ferromagnetic portion, is attached to a probe, and is mounted on a ball joint and the ball joint is pivotally mounted on a pin the ends of which extend through slots in a housing. Spring means urge the pin ends against one end of the respective slots. A mechanical null position spring urges the shaft to a mechanical null position off of the longitudinal axis of the housing. A means responsive to changes in position of the shaft from an electrical null position along the longitudinal axis of the housing gives an output to drive a control apparatus to correspond to changes in position of the probe represented by changes in position of the shaft.

REFERENCES:
patent: 3171012 (1965-02-01), Morehead
patent: 3408475 (1968-10-01), Fier
patent: 3457484 (1969-07-01), Shimizu et al.
patent: 3997757 (1967-12-01), Cecil et al.
patent: 4151394 (1979-04-01), Cecil

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