公开(公告)号：US5027108A

公开(公告)日：1991-06-25

申请号：US487830

申请日：1990-03-05

申请人： Alden J. Gray

发明人： Alden J. Gray

IPC分类号： G01R31/02

CPC分类号： G01R31/025

摘要： A method and a device for use with horizontal boring equipment or excavating equipment while making an underground tunnel or digging near known or unknown electric power lines. The device indicates contact with the electrical conductors, whether the contact is momentary or continuous, by monitoring voltage gradients in the earth and activating an alarm if voltage is sensed.

摘要翻译： 一种用于水平钻孔设备或挖掘设备的方法和装置，同时在已知或未知的电力线附近进行地下隧道或挖掘。 该装置通过监测地球中的电压梯度，并且如果感测到电压，则启动报警，指示与导体的接触，触点是瞬时的还是连续的。

公开(公告)号：US4905743A

公开(公告)日：1990-03-06

申请号：US271212

申请日：1988-11-14

申请人： Alden J. Gray

发明人： Alden J. Gray

IPC分类号： B67D1/12 ,  B67D3/04

CPC分类号： B67D1/1238 ,  B67D3/043

摘要： A valve and coacting control circuitry for filling variously sized and shaped receptacles to an exact settable level with a relatively high impedance fluid such as maple syrup. Errors caused by bubbles are avoided by controlling the flow rate through a shaped orifice for essentially laminar flow. Dripping is eliminated by shaping the exit orifice to prevent gravitational emptying of the faucet cavity when the valve is closed. Sensing of the fluid is accomplished with a flexible wire probe, not sensitive to the receptacle shape but may be adjusted to a desired height, connected to a sensitive electronic circuit with a very high input impedance which allows sensing a voltage through the high impedance fluid. Once started, the filling process need not be monitored by an operator who is then free to do other tasks.

摘要翻译： 阀和共同控制电路，用于用相对高阻抗的流体（例如枫糖浆）将各种尺寸和形状的容器填充到具有可精确设置的水平。 通过控制通过成形孔的流速基本上层流来避免由气泡引起的错误。 通过成形出口孔来消除滴落，以防止阀关闭时龙头腔的重力排空。 流体的感测是通过对容器形状不敏感的柔性线探头实现的，但是可以将其调节到期望的高度，连接到具有非常高的输入阻抗的敏感电子电路，其允许感测通过高阻抗流体的电压。 一旦开始，填充过程不需要由随后可以执行其他任务的操作者来监视。