公开(公告)号：US3946410A

公开(公告)日：1976-03-23

申请号：US490220

申请日：1974-07-19

申请人： Osamu Maida

发明人： Osamu Maida

IPC分类号： G03B17/42 ,  G03B17/46 ,  G03B21/50 ,  G03B1/18

CPC分类号： G03B17/42 ,  G03B17/46 ,  G03B21/50

摘要： A capacitor-energized electromagnetic trigger device controls the energization of a camera motor which drives a film transport and shutter mechanism. For one-frame photography the motor is de-energized after a predetermined number of revolutions and then the transport and shutter mechanism is immobilized by a restraining device. For continuous photography the motor continues to operate and the restraining device is maintained ineffective. For repetitive one-frame photography, the capacitor is recharged after a one-frame cycle and the cycle is repeated. Embodiments are disclosed having different types of switching circuits, including different arrangements of transistor switches, SCR switches, mode selection switches, reset switches, and starting and holding coils.

摘要翻译： 电容器通电电磁触发装置控制驱动胶片传送和快门机构的相机电机的通电。 对于一帧拍摄，电机在预定转数之后被断电，然后传输和快门机构被限制装置固定。 为了连续拍摄，电机继续运行，并且限制装置保持无效。 对于重复的单帧摄影，电容器在一帧周期后进行充电，并重复该周期。 公开了具有不同类型的开关电路的实施例，包括晶体管开关，SCR开关，模式选择开关，复位开关和启动和保持线圈的不同布置。

公开(公告)号：US3934178A

公开(公告)日：1976-01-20

申请号：US463246

申请日：1974-04-23

申请人： Osamu Maida

发明人： Osamu Maida

IPC分类号： H03K17/28 ,  H01H47/18

CPC分类号： H03K17/28

摘要： For the purpose of assuring the holding latching relay in a nonconductive situation whenever an operator turns off a power switch, this invention provides a circuit for generating a signal for a predetermined time interval after the power switch is opened. The circuit includes a power switch, a capacitor charge only when the power switch is closed, a transistor and means for applying a terminal voltage of the capacitor to the transistor in order to render it conductive when the power switch is opened. A rectifier may be provided to prevent a reverse current and the capacitor maybe charged through the rectifier.

摘要翻译： 为了在操作者关闭电源开关时，在不导电的情况下确保保持闭锁继电器的目的，本发明提供一种用于在电源开关断开之后以预定的时间间隔产生信号的电路。 该电路包括电源开关，电容器仅在电源开关闭合时才产生电容器电荷，晶体管和用于将电容器的端子电压施加到晶体管的装置，以便在电源开关断开时使其导通。 可以提供整流器来防止反向电流，并且电容器可以通过整流器充电。