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    • 3. 发明授权
    • Control circuit for shuttle car
    • 班车控制电路
    • US4118658A
    • 1978-10-03
    • US790304
    • 1977-04-25
    • John P. SalvaGregory M. MudzinskiJohn A. MillsShashi B. Dewan
    • John P. SalvaGregory M. MudzinskiJohn A. MillsShashi B. Dewan
    • H02P7/00H02P7/29H02M7/68
    • H02P7/29H02P7/05
    • A control circuit for use with a shuttle car used in mining operations and circuitry associated therewith. The control circuit generally comprises a chopper circuit in series with a reversing circuit and a traction motor which drives the shuttle car. The chopper circuit essentially comprises two separate current paths each through a separate set of silicon controlled rectifiers or SCRs and a common capacitor. A logic circuit controlled by the operator alternately gates the sets of SCRs thereby placing voltage across the traction motor. The magnitude of this voltage and hence the speed of the motor are directly proportional to the frequency of the gating pulses. The reversing section also employs two sets of SCRs and a common field inductance. The operator, through the logic circuit, triggers one set of SCRs and current flows through the field inductance in a forward direction causing the traction motor to operate in a forward mode. When the second set of SCRs are triggered, the current through the field inductance is reversed, and accordingly, the current through the motor will also be reversed causing it to reverse direction. Consequently, the chopper circuit controls the car's speed while the reversing circuit controls its direction. The control circuit is also provided with a power circuit which creates the voltage for the logic circuit as well as a pump motor circuit which controls the car's hydraulics and a conveyor motor circuit which controls the loading and unloading functions.
    • 用于采矿作业中使用的穿梭车和与其相关的电路的控制电路。 控制电路通常包括与反转电路串联的斩波电路和驱动梭车的牵引电动机。 斩波电路基本上包括两个单独的电流路径,每个电流路径分别通过一组单独的可控硅整流器或SCR和公共电容器。 由操作者控制的逻辑电路交替地浇注SCR组,从而将电压跨越牵引电动机。 该电压的大小以及因此电动机的速度与门控脉冲的频率成正比。 反向部分还采用两组SCR和一个公共场电感。 操作员通过逻辑电路触发一组SCR和电流在正向上穿过励磁电感,使牵引电动机以正向模式工作。 当第二组SCR被触发时,通过场电感的电流反转,因此,通过电动机的电流也将反转,使其反向。 因此,当逆变电路控制其方向时,斩波电路控制汽车的速度。 该控制电路还具有电源电路,其产生用于逻辑电路的电压以及控制汽车液压的泵电机电路和控制加载和卸载功能的输送机电机电路。
    • 4. 发明授权
    • Manufacture of ventilated cigarettes
    • 制造通风香烟
    • US4665930A
    • 1987-05-19
    • US655440
    • 1984-09-28
    • Hugh M. ArthurJohn A. MillsGodfrey A. Wood
    • Hugh M. ArthurJohn A. MillsGodfrey A. Wood
    • A24C5/00A24C5/60B26D7/08B26F1/24
    • B26F1/24A24C5/607B26D7/086
    • Cigarettes are perforated by being rolled along a row of pins which are excited, for example by being vibrated. Vibration may be towards and away from the cigarettes so that the pins penetrate as a result of the vibration; the depth of penetration may be varied to control the size of the perforations. Alternatively the vibration may be in a direction transverse to the axes of the pins. In either case the pins may be mounted on a flexible member having a resonant frequency equal to the frequency of vibration. The vibratorary drive may be an electro magnetic device or a piexoelectric crystal. An alternative form of excitation of the pins involves passing compressed air through the pins and into the cigarettes, the pins being tubular for that purpose.
    • 卷烟沿着一排销被穿孔,这些销被激发,例如通过振动。 振动可以朝向和远离香烟,使得销由于振动而穿透; 可以改变穿透深度以控制穿孔的尺寸。 或者,振动可以在横向于销的轴线的方向上。 在任一情况下,销可以安装在具有等于振动频率的谐振频率的柔性构件上。 振动驱动器可以是电磁装置或压电电晶体。 引脚的另一种形式的激励涉及将压缩空气通过销引入到香烟中,这些销用于此目的是管状的。
    • 6. 发明授权
    • Articulated drafting device for drawing perspectives
    • 用于绘制视角的铰接牵伸装置
    • US5632094A
    • 1997-05-27
    • US515819
    • 1995-08-16
    • John A. Mills
    • John A. Mills
    • B43L13/14
    • B43L13/145
    • A portable drafting device and learning tool for laying out perspective drawing lines to enhance the realism of standard 30 degree base line isometric drawings and other similar drawings with different base line angles. The device comprises a rectangular drawing board including a plurality of holes disposed linearly in the upper corner portions thereof for pivotally mounting a plurality of articulated arm members in functional relationship with the drawing surface. The articulated arms comprise upper arm portions which are pivotally coupled to straight-edge members, each being disposed at approximately thirty degrees to horizontal. Upper arm portions are provided with a plurality of adjustment holes for alternate placement of pivot pins, or a slot to effect vertical adjustment of the articulated arms in relation to the drawing surface. Straight-edge members may be pivoted at varying angles in relation to upper arm members to enable selective adjustment of the desired vanishing point distance. The drafting apparatus includes a set of perspective scalers which are selectively utilized as measurement guides for adding perspective enhancement to the vertical and horizontal features of the drawings. The invention is of particular benefit to the student draftsperson or artist who does not possess the skill necessary to produce precise perspective drawings.
    • 一种便携式绘图装置和学习工具,用于布置透视图,以增强标准30度基线等轴测图和其他类似图形的不同基线角度的现实性。 该装置包括:矩形绘图板,其包括在其上角部分中线性设置的多个孔,用于可枢转地安装与绘图面成功能关系的多个关节臂构件。 铰接臂包括枢转地联接到直边构件的上臂部分,每个直立部件以水平方向大约三十度设置。 上臂部分设置有多个用于枢转销的交替放置的调节孔或者用于实现铰接臂相对于拉伸表面的垂直调节的槽。 直边构件可以相对于上臂构件以不同的角度枢转,以便能够选择性地调节所需的消失点距离。 牵伸装置包括一组透视缩放器,其被选择性地用作用于将透视增强添加到附图的垂直和水平特征的测量引导件。 本发明对于不具备产生精确的透视图所必需的技能的学生素描者或艺术家特别有益。
    • 7. 发明授权
    • Trigonometric teaching aid
    • 三角教学
    • US07278217B1
    • 2007-10-09
    • US11309738
    • 2006-09-20
    • John A. Mills
    • John A. Mills
    • B43L7/10
    • G09B23/04G01B3/563G09B19/02
    • A trigonometric teaching aid for providing students with real life applications for the principles of trigonometry includes a transit assembly having a sight tube with cross hairs, a level and an upper protractor pivotally connected to an upper end of a vertical scale, and a base assembly including a lower protractor pivotally connected to a lower end of the scale member. By leveling the transit assembly and measuring the angles of inclinations at the protractors, student using trigonometric formulas, tables and classroom lessons can determine physical measurements of real life objects.
    • 用于为学生提供三角学原理的现实生活应用的三角教学辅助装置包括具有十字线的视线管的转接组件,可枢转地连接到垂直刻度的上端的水平仪和上量角器,以及包括 枢轴连接到刻度件的下端的下量角器。 通过平整运输组件和测量量角器的倾斜角度,学生使用三角公式,表格和课堂课程可以确定现实生活中物体的物理测量。
    • 8. 发明授权
    • Perspective view drafting device
    • 透视图起草装置
    • US07204028B1
    • 2007-04-17
    • US11163321
    • 2005-10-14
    • John A. Mills
    • John A. Mills
    • B43L13/14
    • B43L5/00B43L7/00B43L13/141
    • A drafting device creating perspective views from horizontal base lines with remote horizontal vanishing points and with a remote skyline vanishing point. The drafting device includes articulated arm assemblies on opposite sides of the board. Each arm assembly includes a lower straight edge that is pivotally connected by primary and secondary arms to a pivot arm pivotally mounted at opposed sides of the drawing board, thereby establishing an adjustable four-bar linkage that allows the straight edge to be oriented at vertically varying horizontal base lines with horizontal vertical vanishing points remote from the drawing board and variable perspective angles. In combination with ordinary drafting tools and scales, the drafter can create three dimensional objects as viewed from a horizontal base line perspective.
    • 起草设备从水平基线创建具有远程水平消失点和远程天际线消失点的透视图。 牵伸装置包括在板的相对侧上的铰接臂组件。 每个臂组件包括下直直边缘,其通过主臂和次臂枢转地连接到可枢转地安装在绘图板的相对侧处的枢转臂,由此建立可调节的四杆连杆,其允许直边沿垂直变化 水平基线与水平垂直消失点远离绘图板和可变的透视角度。 与普通起草工具和秤相结合,起草者可以从水平基线的角度来看,创建三维物体。