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1. 发明授权

US4830083A Mold material and process for casting of pure titanium or titanium alloy 失效
标题翻译：用于铸造纯钛或钛合金的模具材料和工艺
公开(公告)号：US4830083A
公开(公告)日：1989-05-16
申请号：US97019
申请日：1987-09-16
申请人： Seizo Nakamura
发明人： Seizo Nakamura
IPC分类号： B22C1/00 , B22C1/18
CPC分类号： B22C1/18 , B22C1/00
摘要： The present invention relates to a mold material for casting pure titanium or a titanium alloy which comprises one or more chief materials selected from among silica-alumina mixtures, mullite and spinel and a hardening agent comprising a phosphate and a basic metal oxide and a process for casting pure titanium or a titanium alloy by the use of said mold material. This mold material forms a refractory structure having a melting point higher than that of pure titanium or a titanium alloy therein to enable pure titanium which is unstable in a molten state to be cast stably.
摘要翻译：本发明涉及一种用于铸造纯钛或钛合金的模具材料，其包含一种或多种选自二氧化硅 - 氧化铝混合物，莫来石和尖晶石的主要材料和包含磷酸盐和碱性金属氧化物的固化剂，以及用于通过使用所述模具材料铸造纯钛或钛合金。该模具材料形成熔点高于纯钛或其中的钛合金的耐火结构，以使熔融态不稳定的纯钛稳定地铸造。

2. 发明授权

US4830823A Dental titanium alloy castings 失效
标题翻译：牙科钛合金铸件
公开(公告)号：US4830823A
公开(公告)日：1989-05-16
申请号：US97785
申请日：1987-09-18
申请人： Seizo Nakamura
发明人： Seizo Nakamura
IPC分类号： C22C14/00 , A61K6/04
CPC分类号： A61K6/04
摘要： Dental titanium alloy castings have physical properties equal to physical characteristics incidental to a Ti-6Al-4 V alloy can be obtained by casting titanium alloys containing aluminium at a ratio of 1.5 to 4.0% by weight and vanadium at a ratio of 1.0 to 3.0% by weight.
摘要翻译：具有与Ti-6Al-4V合金附带的物理特性相同的物理性质可以通过以1.5〜4.0重量％的比例浇铸含有铝的钛合金和1.0〜3.0重量％的比例来获得，重量。

3. 发明授权

US5539355A Frequency-shift-keying detector using digital circuits 失效
标题翻译：使用数字电路的频移键控检测器
公开(公告)号：US5539355A
公开(公告)日：1996-07-23
申请号：US460653
申请日：1995-06-02
申请人： Seizo Nakamura
发明人： Seizo Nakamura
IPC分类号： H04L27/14 , H04L27/152
CPC分类号： H04L27/1525
摘要： A signal modulated by frequency-shift keying is input to a detector consisting of an instantaneous phase detection circuit that detects the instantaneous phase of the input signal, a differentiating circuit that differentiates the instantaneous phase to obtain the instantaneous frequency, and a baseband processing circuit that recovers clock and data signals from the instantaneous frequency. To detect the instantaneous phase, the instantaneous phase detection circuit compares the logic levels of the input signal and a clock signal, and filters the resulting bit stream with a digital low-pass filter. The detector consists entirely of digital circuits that are well suited for large-scale integration.
摘要翻译：通过频移键控调制的信号输入到检测输入信号的瞬时相位的瞬时相位检测电路，区分瞬时相位以获得瞬时频率的微分电路的检测器，以及基带处理电路，从瞬时频率恢复时钟和数据信号。为了检测瞬时相位，瞬时相位检测电路比较输入信号和时钟信号的逻辑电平，并用数字低通滤波器对结果比特流进行滤波。检测器完全由数字电路组成，非常适合大规模集成。

4. 发明授权

US4700769A Casting apparatus for titanium or titanium alloy 失效
标题翻译：钛合金或钛合金铸造设备
公开(公告)号：US4700769A
公开(公告)日：1987-10-20
申请号：US746101
申请日：1985-06-18
申请人： Isao Ohara , Seizo Nakamura
发明人： Isao Ohara , Seizo Nakamura
IPC分类号： B22D21/00 , B22D27/02
CPC分类号： B22D21/005 , B22D27/02
摘要： Improved casting of titanum or alloy of titanium is obtained by using a crucible and a mold made of high-purity magnesium oxide and/or zirconium oxide. It is also possible for only the interior portion of the crucible to be made of such high-purity material, or for the mold to be made of copper or an alloy of copper. The mold and crucible can be used in a centrifugal-type casting machine or a compression-type casting machine. In either machine, discharge vents must be provided in the mold to connect the casting chamber with the outer atmosphere. An argon electric arc generated between a pivotable, tiltable cathode and an anode may be used for melting the titanium in the crucible. A high-frequency electric current can also be used to melt the titanium. By using the above apparatus, it is possible to obtain castings which are dimensionally accurate and do not have an external layer of fragile metal oxide or rough cavities.
摘要翻译：通过使用坩埚和由高纯度氧化镁和/或氧化锆制成的模具，可以获得钛或钛合金的改进铸造。坩埚的内部部分也可以由这种高纯度材料制成，也可以由铜或铜合金制成。模具和坩埚可用于离心式铸造机或压缩型铸造机。在任一机器中，必须在模具中提供排气口以将铸造室与外部大气连接。在可枢转的可倾斜阴极和阳极之间产生的氩电弧可用于熔化坩埚中的钛。也可以使用高频电流来熔化钛。通过使用上述装置，可以获得尺寸精确并且不具有脆弱的金属氧化物或粗糙空腔的外部层的铸件。

5. 发明授权

US5654987A Clock recovery circuit with reduced jitter 失效
标题翻译：时钟恢复电路，抖动减小
公开(公告)号：US5654987A
公开(公告)日：1997-08-05
申请号：US457440
申请日：1995-06-01
申请人： Seizo Nakamura
发明人： Seizo Nakamura
IPC分类号： H04L27/22 , H03L7/08 , H04L7/00 , H04L7/033 , H04L27/227
CPC分类号： H03L7/0807 , H04L7/0334
摘要： A clock recovery circuit has at least two comparators that detect timings at which a digitally modulated signal crosses different levels, and generate level crossing signals at these timings. A classifying circuit classifies sequences of these level crossing signals and issues corresponding classification signals. A timing control circuit generates timing pulses from certain combinations of the level crossing signals and classification signals. A digital phase-locked loop outputs a clock signal synchronized to these timing pulses.
摘要翻译：时钟恢复电路具有至少两个比较器，其检测数字调制信号跨越不同电平的定时，并在这些定时产生电平交叉信号。分类电路将这些电平交叉信号的序列分类并发出相应的分类信号。定时控制电路从电平交叉信号和分类信号的某些组合产生定时脉冲。数字锁相环输出与这些定时脉冲同步的时钟信号。

6. 发明授权

US5537442A Instantaneous phase detecting circuit and clock recovery signal generating circuit incorporated in differential demodulator 失效
标题翻译：瞬时相位检测电路和时钟恢复信号发生电路并入差分解调器
公开(公告)号：US5537442A
公开(公告)日：1996-07-16
申请号：US307632
申请日：1994-09-20
申请人： Seizo Nakamura , Yuji Iguchi , Akinobu Kodama
发明人： Seizo Nakamura , Yuji Iguchi , Akinobu Kodama
IPC分类号： H03D13/00 , H04L7/033 , H04L7/04 , H04L25/06 , H04L27/22 , H03D3/22 , H03D3/24 , H04L7/00
CPC分类号： H03D13/002 , H03D13/00 , H04L25/061 , H04L27/22 , H04L7/0331 , H04L7/04 , H04L7/046
摘要： A clock recovery signal generating circuit for generating a clock recovery signal includes a plurality of detection axis cross detectors varied in magnitude of detection axis admitting a phase difference signal, for detecting the time at which the phase difference signal crosses the detection axis of a prescribed magnitude. A locus sorter discriminates and sorts the locus of a change in the phase difference signal based on the data of timing obtained by the detection axis cross detectors and generates a timing adjusting signal in conformity with the result of the sorting. Timing control generates a clock recovery signal by correcting the data of timing obtained by one of the plurality of detection axis cross detectors designated by the timing adjusting signal with the time designated by the timing adjusting signal.
摘要翻译： PCT No.PCT / JP93 / 01904。 371日期1994年9月20日 102（e）1994年9月20日PCT 1993年12月27日PCT公布。出版物WO94 / 17618 PCT 日期：1994年8月4日。一种用于产生时钟恢复信号的时钟恢复信号发生电路包括多个检测轴交叉检测器，该检测轴交叉检测器在允许相位差信号的检测轴的大小上变化，用于检测相位差信号与检测轴为规定的大小。轨迹分类器基于由检测轴交叉检测器获得的定时数据，对相位差信号的变化轨迹进行鉴别和排序，并根据分选结果产生定时调整信号。定时控制通过校正由定时调整信号指定的多个检测轴交叉检测器之一获得的定时数据与定时调整信号指定的时间来产生时钟恢复信号。

7. 发明授权

US4709741A Mold material and process for casting of pure titanium or titanium alloy 失效
标题翻译：用于铸造纯钛或钛合金的模具材料和工艺
公开(公告)号：US4709741A
公开(公告)日：1987-12-01
申请号：US803447
申请日：1985-12-02
申请人： Seizo Nakamura
发明人： Seizo Nakamura
IPC分类号： B22C1/00 , B22C1/18
CPC分类号： B22C1/18 , B22C1/00
摘要： The present invention relates to a mold material for casting pure titanium or a titanium alloy which comprises one or more chief materials selected from among silica-alumina mixtures, mullite and spinel and a hardening agent comprising a phosphate and a basic metal oxide and a process for casting pure titanium or a titanium alloy by the use of said mold material. This mold material forms a refractory structure having a melting point higher than that of pure titanium or a titanium alloy therein to enable pure titanium which is unstable in a molten state to be cast stably.
摘要翻译：本发明涉及一种用于铸造纯钛或钛合金的模具材料，其包含一种或多种选自二氧化硅 - 氧化铝混合物，莫来石和尖晶石的主要材料和包含磷酸盐和碱性金属氧化物的固化剂，以及用于通过使用所述模具材料铸造纯钛或钛合金。该模具材料形成熔点高于纯钛或其中的钛合金的耐火结构，以使熔融态不稳定的纯钛稳定地铸造。

8. 发明授权

US5703914A Clock recovery circuit employing delay-and-difference circuit and pulse-sequence detection 失效
标题翻译：采用延迟和差分电路和脉冲序列检测的时钟恢复电路
公开(公告)号：US5703914A
公开(公告)日：1997-12-30
申请号：US508045
申请日：1995-07-27
申请人： Seizo Nakamura
发明人： Seizo Nakamura
IPC分类号： H04L27/22 , H04L7/027 , H04L7/033 , H04L7/04 , H04L25/06 , H04L27/227 , H04L7/00
CPC分类号： H04L25/06 , H04L7/0334 , H04L7/046
摘要： A clock recovery circuit receives an input signal having an eye pattern and takes differences at certain intervals to generate a differential signal. A set of comparators detect timings at which the differential signal matches different levels, and generate pulse signals at these timings. A gate-signal generating circuit detects timing relationships among these pulse signals, and activates a gate signal when pulse sequences having certain timing relationships are detected. A delay circuit delays one of the pulse signals to create a delayed signal. A gate circuit outputs the delayed signal as a timing signal when the gate signal is active. A phase-locked loop generates a clock signal synchronized to the timing signal.
摘要翻译：时钟恢复电路接收具有眼图的输入信号，并以一定间隔进行差分以产生差分信号。一组比较器检测差分信号与不同电平匹配的定时，并在这些定时产生脉冲信号。门信号发生电路检测这些脉冲信号之间的定时关系，并且当检测到具有某些定时关系的脉冲序列时激活门信号。延迟电路延迟一个脉冲信号以产生延迟信号。当门信号有效时，门电路输出延迟信号作为定时信号。锁相环产生与定时信号同步的时钟信号。

9. 发明授权

US5668838A Instantaneous phase detecting circuit and clock recovery signal generating circuit incorporated in differential demodulator 失效
标题翻译：瞬时相位检测电路和时钟恢复信号发生电路并入差分解调器
公开(公告)号：US5668838A
公开(公告)日：1997-09-16
申请号：US621646
申请日：1996-03-26
申请人： Seizo Nakamura , Yuji Iguchi , Akinobu Kodama
发明人： Seizo Nakamura , Yuji Iguchi , Akinobu Kodama
IPC分类号： H03D13/00 , H04L7/033 , H04L7/04 , H04L25/06 , H04L27/22 , H03D1/00 , H04L27/06
CPC分类号： H03D13/002 , H03D13/00 , H04L25/061 , H04L27/22 , H04L7/0331 , H04L7/04 , H04L7/046
摘要： An instantaneous phase detecting circuit for detecting the phase of a digital phase modulation wave signal which includes first and second logic circuits, first and second phase detecting circuits, and a third logic circuit. The first and second logic circuits receive the modulation wave signal, the first logic circuit receives a first carrier signal, and the second logic circuit receives a second carrier signal, the phase of the second carrier signal being delayed by a fixed period with respect to the phase of the first carrier signal. The first and second logic circuits generate first and second arithmetic outputs which are received by the first and second phase detecting circuits which detect the phases of the first and second arithmetic outputs to generate first and second detection output signals respectively. The third logic circuit receiving the first and second detection output signals and compares a periodic deviation of the first and second detection output signals to detect the phase of the modulation wave signal.
摘要翻译：一种用于检测包括第一和第二逻辑电路，第一和第二相位检测电路以及第三逻辑电路的数字相位调制波信号的相位的瞬时相位检测电路。第一和第二逻辑电路接收调制波信号，第一逻辑电路接收第一载波信号，第二逻辑电路接收第二载波信号，第二载波信号的相位延迟相对于第一载波信号的相位。第一和第二逻辑电路产生由第一和第二相位检测电路接收的第一和第二运算输出，其检测第一和第二运算输出的相位，以分别产生第一和第二检测输出信号。接收第一和第二检测输出信号的第三逻辑电路，并比较第一和第二检测输出信号的周期性偏差，以检测调制波信号的相位。

10. 发明授权

US5036297A High-speed digital PLL device 失效
标题翻译：高速数字PLL器件
公开(公告)号：US5036297A
公开(公告)日：1991-07-30
申请号：US578555
申请日：1990-09-06
申请人： Seizo Nakamura
发明人： Seizo Nakamura
IPC分类号： H03L7/06 , H03L7/081 , H03L7/099 , H03L7/183 , H04L7/033
CPC分类号： H03L7/0991 , H03L7/0814 , H03L7/183 , H04L7/0337
摘要： In a device for producing a signal in synchronism with the phase of an input signal, a tapped delay timer produces a plurality of signals which have phases different from each other, a selection circuit selectively outputs the output signals of the tapped delay circuit, a frequency divider frequency-divides the output signal of the selection signal, a phase comparator compares the phases of the input digital signal and the output signal of the frequency divider, and a control circuit controls the selection circuit in accordance with the output of the phase comparator, so as to make the phase of the output signal of the frequency-divider to coincide with the input digital signal. A low-pass filter is provided to remove the hazard that is generated in the selection circuit. A waveform shaping circuit is provided to shape the waveform of the output signal of the low-pass filter into rectangular waveform.
摘要翻译：在用于与输入信号的相位同步产生信号的装置中，抽头延迟定时器产生具有相互不同相位的多个信号，选择电路选择性地输出抽头延迟电路的输出信号，频率分频器分频选择信号的输出信号，相位比较器比较输入数字信号的相位和分频器的输出信号，控制电路根据相位比较器的输出控制选择电路，以使分频器的输出信号的相位与输入的数字信号一致。提供低通滤波器来消除在选择电路中产生的危险。提供波形整形电路以将低通滤波器的输出信号的波形成形为矩形波形。

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