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1. 发明授权

US3993942A Forced commutation chopper having current limit 失效
标题翻译：强制换向斩波器有电流限制
公开(公告)号：US3993942A
公开(公告)日：1976-11-23
申请号：US612537
申请日：1975-09-11
申请人： Harvey E. Schmidt , Michael H. Grace , Howard G. Murphy
发明人： Harvey E. Schmidt , Michael H. Grace , Howard G. Murphy
IPC分类号： H02P7/29 , H02P7/06
CPC分类号： H02P7/29 , Y10S388/919 , Y10S388/92
摘要： A forced commutation chopper control for regulating speed of a DC series tractive motor limits peak motor current by sensing the voltage across the commutation capacitor during the on-time of the current pulses and gating the commutation SCR on in response to a predetermined magnitude of sensed voltage to thereby terminate current pulses to the motor.
摘要翻译：用于调节直流串联牵引电动机的速度的强制换向斩波器控制通过在电流脉冲的接通时间期间检测换向电容器两端的电压来限制电动机电流峰值，并响应于预定的感测电压幅值来选通换向SCR 从而终止电动机的电流脉冲。

2. 发明授权

US3982161A Time-ratio control having bidirectional speed potentiometer 失效
标题翻译：具有双向速度电位器的时间比控制
公开(公告)号：US3982161A
公开(公告)日：1976-09-21
申请号：US502973
申请日：1974-09-03
申请人： Michael H. Grace
发明人： Michael H. Grace
IPC分类号： B60L11/18 , H02P7/29 , H02P7/08
CPC分类号： H02P7/29 , B60L11/1805 , Y02T10/646 , Y02T10/648 , Y02T10/7005 , Y02T10/7258
摘要： A vehicle is driven by a traction motor energized by pulses of current from a battery conducted by a power switch and has forward and reverse contactors to control motor direction and a variable time-ratio control for regulating motor speed including an RC timing circuit in series with a bidirectional speed potentiometer whose resistance element is provided with a midtap for selectively varying time duration of the pulses. The speed potentiometer wiper is coupled to a manual speed and direction selecting lever having a neutral position wherein the speed potentiometer wiper engages the midtap so that duty cycle of the pulses is minimum and neither contactor is energized, and actuation of the lever in either direction from neutral increases the time duration of the pulses and also energizes the forward or the reverse contactors to thereby control direction of vehicle travel.
摘要翻译：车辆由牵引电动机驱动，该电动机由电力开关传导的电池的电流脉冲驱动，并具有用于控制电动机方向的正向和反向接触器，以及用于调节电动机速度的可变时间比率控制，包括RC定时电路双向速度电位器，其电阻元件设置有中间选择器，用于选择性地改变脉冲的持续时间。速度电位计擦拭器耦合到具有中立位置的手动速度和方向选择杆，其中速度电位器刮水器与中间抽头接合，使得脉冲的占空比最小并且两个接触器都不被通电，并且杆在任一方向上的致动中性点增加脉冲的持续时间，并且还使正向或反向接触器通电，从而控制车辆行驶的方向。

3. 发明授权

US3954250A Remotely controlled crankcase oil drain valve 失效
标题翻译：遥控曲轴箱排油阀
公开(公告)号：US3954250A
公开(公告)日：1976-05-04
申请号：US541066
申请日：1975-01-14
申请人： Michael H. Grace
发明人： Michael H. Grace
IPC分类号： F01M11/04 , F16K31/46
CPC分类号： F01M11/0408 , F16K31/465 , Y10T137/6881
摘要： A two position drain valve or cock is installed permanently in the threaded drain plug opening of an automotive crankcase. The spherical rotary valve element is operated by a crank arm arranged exteriorly of the valve casing on a valve actuating rotary shaft. The crank arm is shifted between valve open and valve closed positions by a push-pull cable assembly including a manual lever pivoted to a mounting bracket which is installed under the hood of an automobile at a conveniently accessible location. Detent means is provided to lock the manual lever in a valve closed position. The shipping package containing the apparatus in kit form may be utilized to receive the dirty oil.
摘要翻译：两位排水阀或旋塞永久地安装在汽车曲轴箱的螺纹排水塞开口中。球形旋转阀元件由设置在阀壳体外部的阀驱动旋转轴上的曲柄臂操作。曲柄臂通过推拉电缆组件在阀打开和阀关闭位置之间移动，该推拉电缆组件包括枢转到安装支架的手动杆，该安装支架安装在便于接近的位置处的汽车的发动机罩下方。提供锁定装置以将手动杆锁定在阀关闭位置。包含试剂盒形式的装置的运输包装可以用于接收脏油。

4. 发明授权

US3959608A Reel arrangement for electric wiring 失效
标题翻译：电线的卷轴布置
公开(公告)号：US3959608A
公开(公告)日：1976-05-25
申请号：US531291
申请日：1974-12-10
申请人： Thomas J. Finlayson , Michael H. Grace , George H. Smith
发明人： Thomas J. Finlayson , Michael H. Grace , George H. Smith
IPC分类号： B66F9/20 , H02G11/02 , H02G11/00
CPC分类号： B66F9/205 , H02G11/02 , Y10S414/131
摘要： The operator's station of a lift truck is optionally elevatable with the carriage and the electric control interconnection between the operator's station, and the truck main frame includes a novel reel mechanism for the multiple lead electric conduit which does not use slip rings. The reel mechanism includes two drums which rotate together on a stationary shaft secured to the main frame. One drum is for coiling a flexible multi-lead round conduit which has its free end connected to the electric control console at the operator's station. The other drum contains a multiple lead flexible ribbon having its outer end connected to the inner end of the round conduit. The ribbon is coiled about the stationary shaft with its radially inner end passing through a hollowed portion of the stationary shaft and thence to a point of connection to a terminal block on the main frame. As the operator's station is raised with the carriage the round conduit is reeled out from the primary drum thereby rotating it against the bias of a windup spring. As the round conduit is reeled out from the primary drum the secondary drum is coiling the loosely wound ribbon about the shaft thus increasing the number of turns of its coil. The use of ribbon type electric conduit in the loosely wound secondary drum obviates the binding and jamming incurred when round conduit is used.
摘要翻译：叉车的操作员站可任选地与托架和操作员站之间的电气控制互连升降，而卡车主框架包括不使用滑环的多引线电导管的新型卷轴机构。卷轴机构包括两个在固定在主框架上的固定轴上一起旋转的滚筒。一个滚筒用于卷绕一个柔性多导圆形导管，其自由端连接到操作员站的电控台。另一个鼓包括一个多引线柔性带，其外端连接到圆形导管的内端。带状物卷绕在固定轴上，其径向内端通过固定轴的中空部分，从而连接到主框架上的接线端子。当操作员站用托架升起时，圆形导管从初级滚筒卷出，从而使其克服着弹簧的偏压旋转。当圆形导管从初级滚筒卷出时，二次滚筒将松动卷绕的丝带卷绕在轴上，从而增加其线圈的匝数。在松散卷绕的二次滚筒中使用带状电导管可消除使用圆形导管时产生的捆扎和卡住。

5. 发明授权

US3947744A Electric truck having elevated load potential energy recovery with means to adjust rate of carriage descent 失效
标题翻译：具有升高的负载能量回收的电动车具有调整车辆下降速度的手段
公开(公告)号：US3947744A
公开(公告)日：1976-03-30
申请号：US516809
申请日：1974-10-21
申请人： Michael H. Grace , Arvin Karazija
发明人： Michael H. Grace , Arvin Karazija
IPC分类号： F15B21/14 , H02J7/14 , H02J7/00
CPC分类号： F15B21/14 , H02J7/14 , Y10S320/34
摘要： A lift truck energized from a battery to supply pressurized fluid to elevate a load-supporting carriage has an energy recovery system for converting kinetic energy of the elevated carriage into battery charging current including a fluid motor through which fluid from the lift ram is exhausted when the carriage is descending, an alternator driven by the fluid motor, a rectifier between alternator and battery, a transistor having its emitter-collector circuit in series with the field winding of the alternator, and a rate-of-descent adjusting potentiometer for selectively varying base drive to the transistor to thereby regulate field excitation of the alternator and the regenerative braking of the fluid motor.
摘要翻译：从电池供电以提供加压流体以提升负载支撑托架的升降机具有能量回收系统，用于将升高的托架的动能转换成电池充电电流，包括流体马达，当马达滑架下降，由流体马达驱动的交流发电机，交流发电机和电池之间的整流器，具有与交流发电机的励磁绕组串联的发射极 - 集电极电路的晶体管，以及用于选择性地改变基极的下降率调节电位器驱动到晶体管，从而调节交流发电机的励磁和流体马达的再生制动。

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