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    Electric sewing machine driving apparatus
    41.
    发明授权
    Electric sewing machine driving apparatus 失效
    电动缝纫机驱动装置

    公开(公告)号：US4403563A

    公开(公告)日：1983-09-13

    申请号：US287075

    申请日：1981-07-21

    Applicant: Nozomu Shinozaki ,  Shigeo Neki ,  Takashi Dohi

    Inventor： Nozomu Shinozaki ,  Shigeo Neki ,  Takashi Dohi

    IPC: D05B69/18 ,  D05B69/26 ,  G05D3/00 ,  H02P3/04 ,  D05B69/22

    CPC classification number: D05B69/26

    Abstract: An electric sewing machine driving apparatus includes a clutch coil of an electromagnetic clutch for transmitting a driving motor torque to a sewing machine, a brake coil of an electromagnetic brake for braking the sewing machine, a needle position signal generator for generating a signal indicative of a position where a needle of the sewing machine is to stop, a DC power supply for energizing the clutch coil and the brake coil, voltage generating means for generating a DC voltage higher than the supply voltage of the DC power supply and a capacitor disposed to be charged by the voltage generated by the voltage generating means, whereby an electric charge stored in the capacitor discharges through the brake coil in response to the needle position signal from the needle position signal generator, thereby improving the needle positioning accuracy of the sewing machine.

    Abstract translation: 一种电动缝纫机驱动装置，其特征在于，包括：电动离合器的离合器线圈，用于将缝纫机的驱动电机转矩传递到所述缝纫机的制动线圈;用于产生指示所述缝纫机的信号的针位置信号发生器; 缝纫机的针停止的位置，用于对离合器线圈和制动线圈通电的直流电源，用于产生高于直流电源的电源电压的直流电压的电压产生装置和设置为 由电压产生装置产生的电压充电，由此存储在电容器中的电荷响应于来自针位置信号发生器的针位置信号而通过制动线圈放电，从而提高缝纫机的针定位精度。

    Electric motor driven vehicles
    42.
    发明授权
    Electric motor driven vehicles 失效
    电动机动车

    公开(公告)号：US4132934A

    公开(公告)日：1979-01-02

    申请号：US736605

    申请日：1976-10-28

    Applicant: John Morton ,  Keith D. Stevens

    Inventor： John Morton ,  Keith D. Stevens

    IPC: B60L7/12 ,  B60L15/20 ,  H02P3/12 ,  H02P7/29 ,  H02P3/04

    CPC classification number: H02P7/2913 ,  B60L15/2009 ,  B60L7/12 ,  H02P3/12 ,  Y02T10/645 ,  Y02T10/7275

    Abstract: A control arrangement is described for dynamically braking a vehicle driven by an electric motor having a single field winding. The control arrangement comprises means for controlling the supply of power to the motor, a permanent magnet generator for mechanically coupling to the motor, and circuit closure means arranged to complete a circuit between the output of the generator and the field winding to dynamically brake the motor when the motor is de-energized by the controlling means.

    Abstract translation: 描述了用于动态地制动由具有单个场绕组的电动机驱动的车辆的控制装置。 控制装置包括用于控制向电动机供电的装置，用于机械耦合到电动机的永久磁铁发生器以及设置成完成发电机的输出与励磁绕组之间的电路以动态制动电动机的电路闭合装置 当电动机被控制装置断电时。

    Protective device in a motor-operated sewing machine
    43.
    发明授权
    Protective device in a motor-operated sewing machine 失效
    电动缝纫机的保护装置

    公开(公告)号：US4104978A

    公开(公告)日：1978-08-08

    申请号：US806154

    申请日：1977-06-13

    Applicant: Tadashi Takahashi ,  Shigeki Morinaga ,  Kuniaki Kubokura

    Inventor： Tadashi Takahashi ,  Shigeki Morinaga ,  Kuniaki Kubokura

    IPC: D05B69/36 ,  D05B69/22 ,  H02P3/04

    CPC classification number: D05B69/22

    Abstract: In a protective device for controlling a sewing machine at a predetermined number of revolutions by a motor equipped with a clutch mechanism and a brake mechanism which are electromagnetically actuated, a protective device is constructed comprising a detector to detect substantially the rotation of the driving shaft of the sewing machine, and a detector to detect the voltage of a control circuit with an output from the detectors being compared with a reference value representative of a predetermined driving state for the sewing machine, so that when the output of the detector becomes lower than the reference value, the operation of the control circuit is terminated, whereby safe operation is provided for the apparatus and an operator.

    Abstract translation: 在通过具有电磁致动装置的离合器机构和制动机构的电动机以预定转数来控制缝纫机的保护装置中，构成了保护装置，该保护装置包括检测器，用于基本上检测驱动轴的旋转 缝纫机和检测器，用于检测来自检测器的输出的控制电路的电压与代表缝纫机的预定驱动状态的参考值进行比较，使得当检测器的输出变得低于 参考值，终止控制电路的操作，由此为设备和操作者提供安全操作。

    Control circuits for electromagnetic clutch-brake driving devices
    44.
    发明授权
    Control circuits for electromagnetic clutch-brake driving devices 失效
    电磁离合器制动装置的控制电路

    公开(公告)号：US3609495A

    公开(公告)日：1971-09-28

    申请号：US3609495D

    申请日：1969-12-05

    Applicant: SINGER CO

    Inventor： SEESSELBERG HENRY A

    IPC: H01F7/18 ,  H02H3/247 ,  H02P3/04 ,  H02P3/06

    CPC classification number: H01F7/1805 ,  H02H3/247

    Abstract: A circuit which does not require mechanical relays is disclosed using silicon-controlled rectifiers (SCR''s) for controlling manually and/or automatically the starting and stopping of a clutch-brake motor having an electromagnetically actuated clutch and brake. Each clutch turnoff brake winding is connected to a source of full wave rectified AC voltage through its own SCR and selective turnoff is effected by capacitor commutation. Momentary overexcitation of both windings is provided by alternative initial discharge therethrough of energy previously stored in respective capacitors. These capacitors are charged through separate individual SCR''s from an AC voltage of a value higher than the normal DC energizing voltage used for continuously exciting the coils. The four SCR''s are turned on in pairs, one SCR of each pair closes a circuit connecting the respective winding to the previously charged capacitor and thereafter to the normal DC energizing bus. Diode gates prevent adverse interaction between the capacitors and the DC bus and provide properly timed energy flow from the DC bus to the winding as soon as the capacitor voltage drops to a value slightly below the bus voltage so that there is no discontinuity in the winding excitation. The trigger pulse which turns on one SCR to energize one winding also turns on the other SCR of the pair, which latter SCR connects the capacitor for charging or storing energy which is later released for initially energizing the other winding. A no-voltage release circuit employs a unijunction transistor (UJT) as a relaxation oscillator connected to a DC supply having a large capacitor. This oscillator provides triggering pulses to the gate of the SCR which controls excitation of the brake winding. Normally, however, with full line voltage, a transistor base-biased to saturation, has its emitter-collector circuit connected across the timing capacitor of the UJT oscillator, thus normally shorting the capacitor and preventing oscillation. Upon failure of line voltage, the transistor turns off due to loss of base bias and the timing capacitor charges from the energy in the large capacitor, and the oscillator supplies a triggering pulse to the SCR for energizing the brake coil. The voltage of the previously charged capacitor now connected to the brake winding will, even in the absence of line voltage, supply a high impulse of energy to the brake coil to bring the load quickly to standstill.

    Clutch motor
    45.
    发明授权
    Clutch motor 失效
    离合器电机

    公开(公告)号：US3582986A

    公开(公告)日：1971-06-01

    申请号：US3582986D

    申请日：1969-05-09

    Applicant: MITSUBISHI ELECTRIC CORP

    Inventor： YOKOYAMA MASAHIRO

    IPC: D05B69/12 ,  D05B69/22 ,  H02K7/10 ,  H02P3/04

    CPC classification number: D05B69/22

    Abstract: A clutch motor for a sewing machine comprising a flywheel on the motor shaft and two concentric clutch wheels connected with one another through reducing gearing and alternatively engageable with the same face of the flywheel. One of the clutch wheels being on an output shaft which is thereby driven at a speed dependent on which clutch wheel is engaged. A lever arrangement makes it possible to stop the sewing machine selectively in different positions as desired.

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