Electricity: motive power systems – Positional servo systems – Program- or pattern-controlled systems
Patent
1974-01-08
1976-10-05
Schaefer, Robert K.
Electricity: motive power systems
Positional servo systems
Program- or pattern-controlled systems
318571, 318676, 112220, 112158E, D05B 302, G05B 1910
Patent
active
039847454
ABSTRACT:
A system is disclosed for a sewing machine in which preselected stitch patterns may be formed automatically. Information related to the positional coordination of the needle penetration for each stitch of each pattern is stored in the sewing machine. Logic means are used to select and release said stitch information in timed relation with the operation of the sewing machine. The selected information is converted to positional analog signals which control closed-loop servo means including a moving-coil linear actuator which directly controls the position of conventional stitch-forming instrumentalities of the sewing machine to reproduce a pattern of stitches corresponding to the selected stitch information.
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Bell Edward L.
Falk Julian
Feldhaus John J.
Schaefer Robert K.
Smith Robert E.
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