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1. 发明授权

US4126823A Magnetic field detection apparatus 失效
标题翻译：磁场检测装置
公开(公告)号：US4126823A
公开(公告)日：1978-11-21
申请号：US856013
申请日：1977-12-22
申请人： Murphy L. Dalton, Jr.
发明人： Murphy L. Dalton, Jr.
IPC分类号： G01R33/022 , G01R33/24 , G01R33/08
CPC分类号： G01R33/022 , G01R33/24
摘要： A magnetic field detector for determining the presence of a magnetic field disturbance in the vicinity of the apparatus senses the difference in magnetic fields at two spaced-apart locations. A pair of field sensors, each including a body of polarizable liquid and a probing coil, are connected in series and provide an output signal that is produced in the coils by the free precession of the protons of the liquid bodies in the earth's magnetic field. A timer circuit controls a relay to alternately connect the magnetometer coils to a source of polarizing current during a polarizing period, and to detection circuitry during a listening period. The detection circuitry includes a high gain signal channel comprising a multi-stage, high input impedance preamplifier and a bandpass amplifier tuned to the frequency range of the signals generated in the probing coils. The output signal from the high gain signal channel is applied to a rectifying circuit that rectifies the amplified free precession signals at a selected bias level to produce a signal that reduces to zero as the free precession signals in the coils decay. Filtering and amplifying of the rectified signal is provided, with the signal being finally applied to a meter operable to follow a low frequency beat signal and provide for the observation and timing of the length of the interval between the beginning of the listening period and the occurrence of the first subsequent minimum value of the beat signal. The time interval is marked by deflections of the meter movement and characterizes the size and distance of a detected object.
摘要翻译：用于确定设备附近存在磁场扰动的磁场检测器感测两个间隔开的位置处的磁场的差异。一系列场敏传感器，每一个都包括一个极化液体和一个探测线圈，它们串联连接，并通过地球磁场中液体质子的自由进动提供在线圈中产生的输出信号。定时器电路控制继电器，以在极化期间将磁力计线圈交替地连接到偏振电流源，并且在收听期间控制检测电路。检测电路包括高增益信号通道，其包括多级高输入阻抗前置放大器和调谐到在探测线圈中产生的信号的频率范围的带通放大器。来自高增益信号通道的输出信号被施加到整流电路，该整流电路以被选择的偏置电平对放大的自由进动信号进行整流，以产生随着线圈中的自由进动信号衰减而减小到零的信号。提供整流信号的滤波和放大，信号最终被施加到可操作以跟随低频拍频信号的仪表，并提供在听力周期开始和发生之间的间隔的长度的观察和定时的差拍信号的第一后续最小值。时间间隔由仪表运动的偏转标记，并表征被检测物体的大小和距离。

2. 发明授权

US4774383A Water tight seals for electronics package 失效
标题翻译：电子封装用水密封
公开(公告)号：US4774383A
公开(公告)日：1988-09-27
申请号：US781239
申请日：1985-09-27
申请人： Murphy L. Dalton, Jr.
发明人： Murphy L. Dalton, Jr.
IPC分类号： F16J15/00 , F16J15/02 , H05K5/06
CPC分类号： H05K5/062 , F16J15/002 , F16J15/028
摘要： Sealing assemblies (16, 18, 20) are disclosed for isolating electronic circuitry (14) within a magnetometer (12) from the effects of water intrusion when the magnetometer is used under water. The electronic circuitry (14) is positioned within an inner cylindrical member (24) and the ends of the inner cylindrical member are sealed by RTV rubber plugs (50, 52). Passages (54) through the plugs permit signal cables to extend from the electronic circuitry to the surface. The compression of the resilient plugs seals against the cable and the inner wall of the inner cylindrical member. Interior O-rings (46, 48) seal between the exterior of the inner cylindrical member and the inner wall of an outer cylindrical member (62) to seal the annular space therebetween. Couplings (66, 68) are secured at each end of the outer cylindrical member (62) and accept nipples (70, 72). Caps (78, 82) are slid over the nipples. Exterior O-rings (88, 90) are positioned on the outer surface of the nipples between facing chamfered seal surfaces on the coupling and cap and are squeezed into sealing engagement between the coupling, cap and nipple as exterior pressure is increased.
摘要翻译：公开了密封组件（16,18,20），用于当磁力计在水下使用时，将磁力计（12）内的电子电路（14）与水侵入的影响隔离。电子电路（14）位于内部圆柱形构件（24）内，并且内部圆柱形构件的端部被RTV橡胶塞（50,52）密封。通过插头的通道（54）可以使信号电缆从电子电路延伸到表面。弹性塞子的压缩件密封在电缆和内圆筒件的内壁上。内部O形环（46,48）在内部圆柱形构件的外部和外部圆柱形构件（62）的内壁之间密封，以密封其间的环形空间。联接器（66,68）固定在外圆柱形部件（62）的每个端部并接纳乳头（70,72）。帽（78,82）在乳头上滑动。外部O形圈（88,90）位于接头外表面上，位于联轴器和盖子上的倒角密封表面之间，并且当外部压力增加时，它们被挤压成联轴器，盖和接头之间的密封接合。

3. 发明授权

US4641094A Magnetometer circuit for measuring the period of beat frequency maxima 失效
标题翻译：用于测量拍频最大值周期的磁力计电路
公开(公告)号：US4641094A
公开(公告)日：1987-02-03
申请号：US600955
申请日：1984-04-16
申请人： Murphy L. Dalton, Jr.
发明人： Murphy L. Dalton, Jr.
IPC分类号： G01R33/022 , G01R33/24 , G01R33/20 , G01V3/14
CPC分类号： G01R33/022 , G01R33/24
摘要： A conventional magnetometer produces an output signal (10) which comprises a series of pulses (12, 14, 16). Each of these pulses has a beat frequency maximum. These pulses are input to a comparator (50) which makes a comparison to a threshold voltage V.sub.0 to produce a bi-level detected signal at a line (62). The detected signal is input to an integrator (52) which produces a series of pulses (78, 80, 82) corresponding respectively with the magnetometer output signal pulses (12, 14, 16). The two states of the detected signal corresponding to positive and negative integration. The time period for the positive integration is proportional to the beat frequency maximum time width period for the corresponding magnetometer output signal pulse. Thus the integrated pulses (78, 80, 82) have an amplitude which is a measure of the maxima time width periods for the corresponding magnetometer signal pulses.
摘要翻译：传统的磁力计产生包括一系列脉冲（12,14,16）的输出信号（10）。这些脉冲中的每一个具有最大的拍频。这些脉冲被输入到与阈值电压V0进行比较以在线（62）产生双电平检测信号的比较器（50）。检测到的信号被输入到积分器（52），该积分器产生分别对应于磁力计输出信号脉冲（12,14,16）的一系列脉冲（78,80,82）。检测信号的两个状态对应于正和负整合。正积分的时间周期与相应的磁力计输出信号脉冲的拍频最大时间宽度周期成比例。因此，积分脉冲（78,80,82）具有作为对应的磁力计信号脉冲的最大时间宽度周期的量度的幅度。

4. 外观设计

USD275025S Subsurface outrigger for the detection of magnetic fields 失效
公开(公告)号：USD275025S
公开(公告)日：1984-08-07
申请号：US417646
申请日：1982-09-13
申请人： Murphy L. Dalton, Jr.
设计人： Murphy L. Dalton, Jr.

5. 发明授权

US4260949A Magnetic field detection apparatus 失效
标题翻译：磁场检测装置
公开(公告)号：US4260949A
公开(公告)日：1981-04-07
申请号：US905480
申请日：1978-06-12
申请人： Murphy L. Dalton, Jr.
发明人： Murphy L. Dalton, Jr.
IPC分类号： G01R33/022 , G01R33/24 , G01R33/08
CPC分类号： G01R33/022 , G01R33/24
摘要： A magnetic field detector for determining the presence of a magnetic field disturbance in the vicinity of the apparatus senses the difference in magnetic fields at two spaced-apart locations. A pair of field sensors, each including a body of polarizable liquid and a probing coil, are connected in series and provide an output signal that is produced in the coils by the free procession of the protons of the liquid bodies in the earth's magnetic field. A timer circuit controls a relay to alternately connect the magnetometer coils to a source of polarizing current during a polarizing period, and to detection circuitry during a listening period. The detection circuitry includes a high gain signal channel comprising a multi-stage, high input impedance preamplifier and a bandpass amplifier tuned to the frequency range of the signals generated in the probing coils. The output signal from the high gain signal channel is applied through a bypassable earphone routing jack to a rectifying circuit that rectifies the amplified free precession signals in the coils decay. Filtering and amplifying of the rectified signal is provided, with the signal being finally applied to a meter operable to follow a low frequency beat signal and provide for the observation and timing of the length of the interval between the beginning of the listening period and the occurence of the first subsequent minimum, or of any minimum thereafter. The time interval is marked by deflections of the meter movement and characterizes the size and distance of a detected object. These beat signals can also be observed aurally by the earphones. A constant field bias coil reduces the time interval between the start of the listen period and first beat zero from infinity to a few seconds, an infinite time interval being the characteristic of open country with no search object influencing the magnetometer.
摘要翻译：用于确定设备附近存在磁场扰动的磁场检测器感测两个间隔开的位置处的磁场的差异。串联连接一对场敏感元件，每一个都包括一个极化液体和一个探测线圈，它们通过地球磁场中的液体质子自由流动而产生在线圈中产生的输出信号。定时器电路控制继电器，以在极化期间将磁力计线圈交替地连接到偏振电流源，并且在收听期间控制检测电路。检测电路包括高增益信号通道，其包括多级高输入阻抗前置放大器和调谐到在探测线圈中产生的信号的频率范围的带通放大器。来自高增益信号通道的输出信号通过可旁路耳机布线插孔施加到整流电路，整流电路对放大的线圈衰减中的自由进动信号进行整流。提供整流信号的滤波和放大，信号最终被施加到可操作以跟随低频拍频信号的仪表，并提供在听力周期开始和发生之间的间隔长度的观察和定时的第一个后续最低值，或其后的最小值。时间间隔由仪表运动的偏转标记，并表征检测到的物体的大小和距离。这些节拍信号也可以通过耳机听觉地观察。恒定场偏置线圈将听觉周期开始和第一节拍零从无穷到少秒的时间间隔缩短，无限时间间隔是没有影响磁力计的搜索对象的开放国家的特征。

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