| 发明名称 |
Adjustable thread tensioning device for a sewing machine |
| 摘要 |
A thread tensioning device for a sewing machine is provided with a rigid beam which pivots on an adjustable fulcrum in engagement with a mounting plate. The device includes an adjustable tension selector movable along the plate and beam for varying the tension on needle thread disposed between the plate and beam.
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| 申请公布号 |
US4372502(A) |
申请公布日期 |
1983.02.08 |
| 申请号 |
US19810246531 |
申请日期 |
1981.03.23 |
| 申请人 |
THE SINGER COMPANY |
发明人 |
LARSEN, ROBERT H.;GIAIMO, ANTHONY |
| 分类号 |
D05B47/00;(IPC1-7):D05B47/02;B65H59/22 |
主分类号 |
D05B47/00 |
| 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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