Electricity: motive power systems – Positional servo systems – Program- or pattern-controlled systems
Patent
1978-09-11
1980-06-03
Dobeck, B.
Electricity: motive power systems
Positional servo systems
Program- or pattern-controlled systems
318653, 21912434, G05B 1736
Patent
active
042063914
ABSTRACT:
Apparatus for tracking a seam between two work members comprising a sensor including a housing with an insulating mounting board therein carrying two first ferrite cores and two second ferrite cores on the upper surface thereof, the two first ferrite cores being each curved in planes normal to the board and each having the faces at the ends thereof lying in a common plane with the first ones of the faces thereof in alignment along a longitudinal axis in the board, the two second ferrite cores being each curved in planes normal to the board and each having a first one of the faces at the ends thereof lying in the common plane and spaced laterally of the longitudinal axis equidistantly, two first coils wound around the first cores and connected in series aiding relation to two second coils wound around the second cores, a signal generator connected to the coils and means for comprising the combined permeabilities in the flux paths of each first core and associated second core with the other first core and its associated second core to generate an error signal used to return the work element to a position overlying the seam.
REFERENCES:
patent: 2921179 (1960-01-01), Anderson
patent: 2971079 (1961-02-01), Sommeria
patent: 3141952 (1964-07-01), Preston
patent: 3201562 (1965-08-01), Anderson
patent: 3484667 (1969-12-01), Wofsey
patent: 4015101 (1977-03-01), Hannappel et al.
Dobeck B.
Gard, Inc.
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