发明名称 |
Electrical automatic pattern stitching sewing machine |
摘要 |
The needle-shifting zig-zag unit and the work feeding unit are moved to different positions, when necessary, for successive stitches, to form a stitching pattern. Each unit is powered by the main rotating drive shaft of the sewing machine. However, each unit is provided with a respective stepper motor. Each stepper motor changes the setting of an adjuster in a reciprocating-motion generator driven by the main drive shaft. When one of these adjusters is in a constant setting, its respective reciprocating-motion generator continually generates reciprocating motion of constant corresponding amplitude, for an unlimited time, so long as the drive shaft rotates. The needle-penetration coordinates for the stitching pattern are established by continually changing the amplitude of the reciprocations performed by the two reciprocating-motion generators. A static memory is read out, in synchronism with sewing, to furnish information commanding the stepper motors to move the amplitude adjusters of the reciprocating-motion generators from one amplitude setting to another, very quickly, to in this way establish all the successive needle-penetration coordinates for even complex stitching patterns.
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申请公布号 |
US4145982(A) |
申请公布日期 |
1979.03.27 |
申请号 |
US19770760948 |
申请日期 |
1977.01.21 |
申请人 |
JANOME SEWING MACHINE CO., LTD. |
发明人 |
KUME, TOSHIAKI;KAKINUMA, TOSHIHIDE;MAKABE, HACHIRO;WATANABE, KAZUO;TAKENOYA, HIDEAKI |
分类号 |
D05B3/02;D05B19/14;D05B27/22;(IPC1-7):D05B3/02 |
主分类号 |
D05B3/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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