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    • 1. 发明授权
    • DC ground fault detecting apparatus with an auto-null circuit and method
    • 具有自动归零电路和方法的直流接地故障检测装置
    • US5530363A
    • 1996-06-25
    • US331672
    • 1994-10-31
    • John GaughanRobert G. Ward
    • John GaughanRobert G. Ward
    • G01R31/02
    • G01R31/025
    • To locate ground faults in a normally ungrounded DC circuit a centertapped voltage divider is connected across the positive and negative buses. An oscillator controlled switch is connected between the centertap and ground which when operating modulates the ground fault currents with a square wave having a repetition rate no greater than 3 hertz. A Hall probe including a field nulling coil is clamped successively along the conductors under test. A capacitive storage circuit maintains the energization of the nulling coil at the level that provided a null indication immediately prior to actuation of a test button. The Hall probe is connected to a read-out oscilloscope which indicates the presence or absence of the square wave modulation. Fault currents as small as 1 ma can be detected.
    • 为了在通常不接地的直流电路中定位接地故障,正压和负母线之间连接有一个分压器。 振荡器控制开关连接在centertap和ground之间,当使用不大于3赫兹重复频率的方波来对接地故障电流进行调制时, 包括场零线圈的霍尔探头沿着被测导体依次夹紧。 电容性存储电路将零线圈的通电维持在紧接着测试按钮致动之前提供空指示的水平。 霍尔探头连接到一个指示方波调制存在或不存在的示波器。 可以检测到小至1ma的故障电流。
    • 3. 发明授权
    • Method and apparatus for producing optical illusions
    • 用于产生视觉错觉的方法和装置
    • US07762896B2
    • 2010-07-27
    • US11639470
    • 2006-12-14
    • John Gaughan
    • John Gaughan
    • A63J5/00A63G31/00
    • A63J5/02A63J21/00
    • A method and apparatus for use in connection with a theatrical stage presentation for rendering an actor or object located on the stage visible or invisible at will. The apparatus used to create the illusion includes a strategically located, selectively transparent screen and a large, generally vertically extending mirror. In carrying out the method of the invention, the mirror is controllably moved across the stage at a location intermediate a rear wall and the selectively transparent screen from a first position out of sight of the audience to a second position wherein the mirror is disposed between the rear wall and the selectively transparent screen.
    • 一种用于与戏剧舞台演示相关联的方法和装置,用于呈现位于舞台上的演员或物体,其可视或不可见。 用于创造幻觉的装置包括一个战略位置,选择性透明的屏幕和一个大的,大致垂直延伸的镜子。 在实施本发明的方法时,镜子可控地移动跨越舞台,位于后壁和选择性透明屏幕之间的位置处,从观众的视线以外的第一位置移动到第二位置,其中反射镜设置在 后墙和选择性透明屏幕。
    • 5. 发明申请
    • Method and apparatus for producing optical illusions
    • 用于产生视觉错觉的方法和装置
    • US20080146356A1
    • 2008-06-19
    • US11639470
    • 2006-12-14
    • John Gaughan
    • John Gaughan
    • A63J5/02
    • A63J5/02A63J21/00
    • A method and apparatus for use in connection with a theatrical stage presentation for rendering an actor or object located on the stage visible or invisible at will. The apparatus used to create the illusion includes a strategically located, selectively transparent screen and a large, generally vertically extending mirror. In carrying out the method of the invention, the mirror is controllably moved across the stage at a location intermediate a rear wall and the selectively transparent screen from a first position out of sight of the audience to a second position wherein the mirror is disposed between the rear wall and the selectively transparent screen.
    • 一种用于与戏剧舞台演示相关联的方法和装置,用于呈现位于舞台上的演员或物体,其可视或不可见。 用于创造幻觉的装置包括一个战略位置,选择性透明的屏幕和一个大的,大致垂直延伸的镜子。 在实施本发明的方法时,镜子可控地移动跨越舞台,位于后壁和选择性透明屏幕之间的位置处,从观众的视线以外的第一位置移动到第二位置,其中反射镜设置在 后墙和选择性透明屏幕。
    • 7. 发明授权
    • Levitation apparatus
    • 悬浮装置
    • US5354238A
    • 1994-10-11
    • US72886
    • 1993-06-07
    • John Gaughan
    • John Gaughan
    • A63J5/12
    • A63J5/12
    • An apparatus for use in performing levitation type illusions in which the performer appears to be raised and moved about in apparent defiance of gravity. The performer is safely supported within a novel harness assembly which, in turn, is supported by a pair of wire arrays made up of a plurality of fine wires which are substantially invisible to the audience. Each of the support wires is spring loaded so as to evenly distribute the weight of the performer among the support wires which make up the arrays. The harness assembly is connected to the wire arrays in a manner that permits several degrees of movement by the performer during lifting and movement relative to the stage so that the movements by the performer appear smooth, natural and graceful.
    • 一种用于执行悬浮式幻觉的装置,其中表现者似乎在显着地不受重力的影响下升高和移动。 表演者安全地支持在一个新颖的线束组件中,该组件又由一对由阵列基本上不可见的精细线构成的线阵列支撑。 每个支撑线都是弹簧加载的,以便在构成阵列的支撑线之间均匀地分配演奏者的重量。 线束组件以允许执行者在相对于舞台的提升和移动期间几度运动的方式连接到线阵列,使得演奏者的运动显得平滑,自然和优雅。