| 摘要 |
In a sewing machine a rotary shaft (5) provides lift motion for a feed dog through an eccentric (34) and connecting members (71, 31) and also provides feed motion through the intermediary of an oscillating shaft (7) driven by an eccentric (43) which is radially adjustable on the rotary shaft (5). The eccentric (43) is frictionally clamped between two members (42, 45) secured to the shaft and is adjustable by means of a screw (60, 81) located in the member (45) and engaging threads in a shoulder portion (78) of the eccentric. <IMAGE> |
