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11.发明授权
公开(公告)号：US4479448A
公开(公告)日：1984-10-30
申请号：US550165
申请日：1983-11-09
CPC分类号： D05B69/22
摘要： An electronically controlled household sewing machine includes an arrangement for needle positioning. The machine responds to a tap of the foot controller for stopping the sewing machine at the next change of state of the armshaft timing signal.
摘要翻译： 电子家用缝纫机包括针定位装置。 机器响应脚踏控制器的水龙头，用于在下一次更换臂轴定时信号时停止缝纫机。
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公开(公告)号：US4323024A
公开(公告)日：1982-04-06
申请号：US141879
申请日：1980-04-21
申请人： Gary D. Jones , Manfred R. Laidig , William Weisz
发明人： Gary D. Jones , Manfred R. Laidig , William Weisz
CPC分类号： D05B29/02
摘要： A hollow bushing (22 or 54) that guides a presser bar (21) to move in a longitudinal direction is threaded at one end (29 and 30). The outer surface of that end is round and, below the thread (59), fits closely but rotatably in a channel (32) in the head (16) of a sewing machine. The bushing is not fixedly held in place in the channel (32). Instead, a tension spring (33) screwed onto the threaded end and onto a threaded member (37) attached to the end of the presser bar (21) within the head (16) pulls the presser bar downwardly so that its foot (24) normally presses against the work (46) and simultaneously pulls the bushing (22 or 54) toward the head (16). A shoulder surface (27 or 58) at a certain location on the bushing (22 or 54) acts as a stop to limit the extent that the cylinder can be drawn into the head. The spring (33) is fully screwed onto the threaded sleeves (30 and 36) until the ends of the spring butt against surfaces (34 and 40), eliminating operator-adjusted presser foot pressure and simiplying the presser foot pressure mechanism.
摘要翻译： 引导压杆（21）沿纵向移动的中空衬套（22或54）在一端（29和30）处是螺纹的。 该端部的外表面是圆形的，并且在线（59）下方紧密但可旋转地配合在缝纫机的头部（16）中的通道（32）中。 衬套没有固定地保持在通道（32）中的适当位置。 相反，拧在螺纹端上并连接到头部（16）内的压杆（21）的端部上的螺纹构件（37）上的拉伸弹簧（33）将压脚向下拉，使得其脚部（24） 通常压靠工件（46）并同时将衬套（22或54）拉向头部（16）。 在衬套（22或54）上的某个位置处的肩部表面（27或58）用作止挡件，以限制气缸能够吸入头部的程度。 弹簧（33）完全旋拧到螺纹套筒（30和36）上，直到弹簧的端部对接表面（34和40），消除了操作者调节的压脚压力并且使压脚压力机构变形。
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