Sewing machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 19, 1988
Grant Date -
N/A
app pub date -
Feb 25, 1986
filing date -
Feb 28, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to an improvement in the home point detection of a motor for a sewing machine wherein the motor is used to rotate a cam into a predetermined feed pitch formed on the cam, and change in the quantity of work piece feeding that corresponds to such feed pitch is transferred to a feed dog through a linkage means. Respective feed pitches are formed in each of the regions of the cam, whereas the detecting position of home point of the motor is set in a suitable position. Moreover, the rotating direction of the cam toward the detecting position of home point is reversed in accordance with each of the regions. Accordingly, the returning speed of the motor back to the detecting position of home point is made fast and only one home point detector is used.
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Family
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Cited Art Landscape
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