Seam tracker

Details Seam tracker Seam tracker

1984-02-23

1985-10-15

Shaw, Clifford C.

Electric heating

Metal heating

By arc

318575, 228 45, B23K 912

Patent

active

045476535

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 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 and thus away from the mechanical null position. Means responsive to changes in position of the shaft from the electrical null position give an output to drive a control apparatus to correspond to changes in position of the probe as it tracks the seam, 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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