Bobbin winding actuation by presser foot up switch
    21.
    发明授权
    Bobbin winding actuation by presser foot up switch 失效
    绕线机通过压脚开关启动

    公开(公告)号:US4457245A

    公开(公告)日:1984-07-03

    申请号:US525909

    申请日:1983-08-24

    IPC分类号: D05B59/00 D05B69/02 D05B69/20

    CPC分类号: D05B59/00

    摘要: An apparatus and method for implementing bobbin winding in place in a looptaker of a sewing machine. When a presser foot lift lever is manipulated to elevate a presser foot, and the sewing machine motor is activated, a series of two or three endwise reciprocations of the sewing machine is effected to bring an upper thread to the lower thread carrying bobbin, after which further endwise reciprocation of the sewing needle is held in abeyance while actuation of the sewing machine motor is continued, to provide the least disturbance of upper thread passage to the lower thread bobbin. No other bobbin winding signaling steps are required.

    摘要翻译: 一种用于在缝纫机的收纳机中实现绕线筒的设备和方法。 当操作压脚提升杆以升高压脚并且缝纫机电动机被激活时,缝纫机的一系列两个或三个端部往复运动被实现以使面线带到下线轴承筒管上,之后 在缝纫机马达继续致动的同时,缝纫针的进一步的往复运动被保持起来,从而使上线通道对下线轴筒的扰动最小。 不需要其他的绕线信号步骤。

    Buttonhole paddle switch position sensing arrangement in a sewing machine
    22.
    发明授权
    Buttonhole paddle switch position sensing arrangement in a sewing machine 失效
    缝纫机切换位置感应装置在缝纫机中

    公开(公告)号:US4372231A

    公开(公告)日:1983-02-08

    申请号:US290892

    申请日:1981-08-07

    IPC分类号: D05B3/06 D05B3/24 D05B3/02

    CPC分类号: D05B3/24 D10B2501/062

    摘要: An electronically controlled multiple pattern sewing machine is provided with an arrangement which senses when the buttonhole paddle and buttonhole presser foot are not properly positioned at the time a buttonhole pattern is selected to be sewn. Under these circumstances, an alarm is activated and stitches are not formed even though the operator may attempt to sew.

    摘要翻译: 一种电子控制多模式缝纫机设置有一种装置,其可以在选择扣眼图案被缝制的时候感测到锁孔和扣眼压脚何时不适当地定位。 在这种情况下,即使操作人员可能尝试缝制,也会启动报警并且不会形成缝合。

    Low bobbin thread detection system including photodetector holder
shielded with plastic lens
    23.
    发明授权
    Low bobbin thread detection system including photodetector holder shielded with plastic lens 失效
    低底线检测系统,包括用塑料镜片屏蔽的光电检测器

    公开(公告)号:US4214542A

    公开(公告)日:1980-07-29

    申请号:US45539

    申请日:1979-06-04

    IPC分类号: B65H63/08 D05B59/02 B65H63/02

    摘要: A holder containing the light detector of the low bobbin thread detection system of a sewing machine and including a light admitting aperture through which light may pass to a photodetector is provided with a plastic tubular collar which extends over the aperture and serves both as a shield to keep lint out of the aperture and as a lens to focus light on a light sensitive surface in the photodetector.

    摘要翻译: 一种包含缝纫机的低底线检测系统的光检测器并且包括光可以通过光入射孔的光入射孔的保持器设置有塑料管状套环,其在孔上延伸并用作屏蔽 保持棉绒离开光圈并作为透镜将光线聚焦在光电检测器的光敏表面上。

    Motor control system incorporating digital top speed limiting arrangement
    24.
    发明授权
    Motor control system incorporating digital top speed limiting arrangement 失效
    电机控制系统采用数字最高速度限制装置

    公开(公告)号:US4199712A

    公开(公告)日:1980-04-22

    申请号:US010454

    申请日:1979-02-08

    IPC分类号: H02P7/295 H02P5/16

    CPC分类号: H02P7/295 Y10S388/919

    摘要: An SCR motor speed control system having a capacitor for triggering the SCR into conduction is provided with circuitry for limiting the top speed of the motor by sensing the time of a predetermined proportion of a motor revolution to determine the motor speed. When the time is below a predetermined time interval, indicative of motor speed above a desired top speed limit, a path is closed to bypass the charging path of the capacitor.

    摘要翻译: 具有用于将SCR触发导通的电容器的SCR电动机速度控制系统设置有用于通过感测电动机转速的预定比例的时间来限制电动机的最高速度来确定电动机速度的电路。 当时间低于预定时间间隔时,表示电机速度高于期望的最高速度限制,路径闭合以绕过电容器的充电路径。

    Method of buttonhole formation
    25.
    发明授权
    Method of buttonhole formation 失效
    扣眼形成方法

    公开(公告)号:US4188900A

    公开(公告)日:1980-02-19

    申请号:US36209

    申请日:1979-05-04

    IPC分类号: D05B3/06 D05B3/24 D05B93/00

    摘要: A method of forming a buttonhole including two spaced apart rows of zig zag stitches so that each row is formed in a like manner with the final overlaying stitches accomplished in the forward direction and which may be initiated by a barring stitch adjacent the edge of the garment followed by a straight stitch down the cutting space to the opposite end of the garment.

    摘要翻译: 一种形成扣眼的方法,包括两个间隔开的锯齿形针迹行,使得每排以类似的方式形成,其中最终的叠合线迹在向前方向上完成,并且可以通过邻近服装边缘的禁止缝合来启动 然后将切割空间直接缝合到衣服的另一端。