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1. 发明授权

US3915573A Variable-frequency interferometer resonance filter 失效
标题翻译：变频干涉仪谐振滤波器
公开(公告)号：US3915573A
公开(公告)日：1975-10-28
申请号：US43915474
申请日：1974-02-04
申请人： HEWLETT PACKARD GMBH
发明人： KNOLL DIETER B , SCHMID ALFONS
IPC分类号： G01J3/26 , G01N21/41 , G01N21/45 , G01B9/02
CPC分类号： G01N21/45
摘要： An apparatus for measuring the absorption index of a flowing liquid includes a measuring cell and a reference cell. Each cell is formed in the space between and confined by the reflectors of an interferometer of the spherical Perot-Fabry type. The cells are located in parallel in a common body and by means of a common piezo-electric tuning element the distance and thus the resonance frequency of each pair of reflectors can be uniformly varied in order to establish the resonance condition for each liquid in the cells. The voltage supplied to the piezo-electric tuning element for establishing the resonance condition is indicative of the relative absorption index of the liquid under test. The reference cell serves to compensate for unwanted disturbances by changes in temperature, in the flow rate and the like.
摘要翻译：用于测量流动液体的吸收指数的装置包括测量池和参考池。每个电池形成在球面Perot-Fabry型干涉仪的反射器之间的空间中并限制。电池平行地位于共同体中，并且通过公共压电调谐元件，每对反射器的距离和谐振频率可以被均匀地变化，以便建立电池中每种液体的共振条件。提供给压电调谐元件以建立共振条件的电压表示被测液体的相对吸收指数。参考单元用于通过温度变化，流量等来补偿不期望的干扰。

2. 发明授权

US3787774A Filter circuitry 失效
标题翻译：滤波电路
公开(公告)号：US3787774A
公开(公告)日：1974-01-22
申请号：US3787774D
申请日：1972-08-28
申请人： HEWLETT PACKARD GMBH
发明人： TIETZE U , COURTIN E , TRAUB S
IPC分类号： H03H11/12 , H03B1/04
CPC分类号： H03H11/1217
摘要： Circuitry for filtering a distinct variable spectral component includes a band-rejection filter formed by a summing amplifier with a feedback loop and a bandpass-filter connected to one of its inputs. The summing amplifier is connected to form the difference between the unfiltered spectrum at one of its inputs and the spectrum component to be suppressed at another of its inputs. The summing amplifier delivers the filtered signal spectrum at its output. A control circuit locks the common center frequency of the bandpass and band-rejection filters to the frequency of the spectral component to be suppressed.
摘要翻译：用于对不同可变频谱分量进行滤波的电路包括由具有反馈回路的求和放大器和连接到其输入之一的带通滤波器形成的带阻滤波器。该相加放大器连接以形成其输入端之一的未滤波频谱与待抑制在另一输入端的频谱分量之间的差值。求和放大器在其输出端提供滤波后的信号频谱。控制电路将带通和带阻滤波器的公共中心频率锁定到待抑制的频谱分量的频率。

3. 发明授权

US3916878A Circuit arrangement for producing a pulse sequence corresponding to a foetal cardiac rhythm 失效
标题翻译：用于产生对应于胎儿心律的脉冲序列的电路装置
公开(公告)号：US3916878A
公开(公告)日：1975-11-04
申请号：US47447474
申请日：1974-05-29
申请人： HEWLETT PACKARD GMBH
发明人： COURTIN ERICH , TRAUB STEFAN
IPC分类号： A61B5/0444 , H03K5/156 , A61B5/04
CPC分类号： A61B5/4362 , A61B5/0444 , A61B5/7203 , H03K5/156
摘要： The present invention relates to a circuit arrangement for producing a pulse sequence corresponding to a foetal cardiac rhythm from a composite signal of an electrocardiogram which includes signals produced by the mother and other sources in addition to the desired foetal signals. The composite signal is conditioned to be within a predetermined dynamic amplitude range and applied to a noise filter. The noise filtered composite signal is applied to two signal processing channels which produce pulse sequences corresponding to the time interval between recurring maternal and foetal QRS complexes.
摘要翻译：本发明涉及一种电路装置，用于根据心电图的复合信号产生对应于胎儿心律的脉冲序列，该脉冲序列除了所需的胎儿信号之外还包括由母体和其他来源产生的信号。复合信号被调节为在预定的动态幅度范围内并且被施加到噪声滤波器。噪声滤波的复合信号被应用于两个信号处理通道，其产生对应于重复的母体和胎儿QRS复合体之间的时间间隔的脉冲序列。

4. 发明授权

US3916226A Method and circuitry to control the deflection of a piezoelectric element 失效
标题翻译：控制压电元件偏转的方法和电路
公开(公告)号：US3916226A
公开(公告)日：1975-10-28
申请号：US44814474
申请日：1974-03-04
申请人： HEWLETT PACKARD GMBH
发明人： KNOLL DIETER BERTRAM
IPC分类号： H03B5/30 , B23Q1/34 , G05D3/00 , G05D3/10 , G05D3/20 , H01L41/00 , H01L41/04 , H01L41/09 , H03B5/32 , H01L41/08
CPC分类号： G05D3/10 , B23Q1/34 , G05B2219/41352 , G05D3/00 , G05D3/20 , H01L41/042
摘要： A piezoelectric tuning element for precisely controlling the distance between two components has a pair of electrodes each located at opposing sides thereof and is supplied with a constant current over a predetermined first time interval establishing a charge of one polarity which is then completely withdrawn during a second time interval. Thereby a linearly increasing deflection from a predetermined initial value to a second precisely predetermined deflection value is caused during the first time interval, and a return to the initial value is achieved precisely, without appreciable hysteresis at the end of the second time interval. The initial level and polarity of the current at the beginning of the second time interval and the final level of the current and its polarity at the end of the second time interval are equal and correspond to the constant level of the current during the first time interval. Thereby a smooth transition from the deflection in one direction to the deflection in the other direction is caused.
摘要翻译：用于精确控制两个部件之间的距离的压电调谐元件具有一对电极，每个电极分别位于相对的两侧，并且在预定的第一时间间隔内被提供恒定电流，从而建立一个极性的电荷，然后在第二时间段内完全撤出时间间隔。从而在第一时间间隔期间引起从预定初始值到第二精确预定偏转值的线性增加的偏转，并且在第二时间间隔结束时没有明显的迟滞而精确地实现返回到初始值。

5. 发明授权

US3905395A Mixing chamber 失效
标题翻译：搅拌室
公开(公告)号：US3905395A
公开(公告)日：1975-09-16
申请号：US42641773
申请日：1973-12-19
申请人： HEWLETT PACKARD GMBH
发明人： HUPE KLAUS PETER
IPC分类号： B01F5/00 , B01F5/02 , B01F5/04 , B01F5/06
CPC分类号： B01F5/04
摘要： A chamber for forceably mixing two streams of liquid under pressure comprising two continuous, parallel, pressure-resistant grid walls having an inlet means for each liquid stream to be mixed and an outlet means for the mixed liquid stream. Each grid wall is a metal screen having a grid aperture in the micron, Mu , range. The distance between the grid walls is in the mm-range and is at least five times less than the diameter of each grid wall. The flow resistance of the grid walls provides uniform distribution of each liquid over each grid wall. Owing to the negligible volume of the mixing chamber, forceable mixing of the liquids, partial volume per partial volume, is achieved with minimum time delay.
摘要翻译：一个用于在压力下强制混合两股液体流的腔室，包括两个连续的，平行的，耐压网格壁，其具有用于待混合的每个液体流的入口装置和用于混合液体流的出口装置。每个格栅壁是具有微米，微米范围的网格孔的金属屏。网格壁之间的距离在mm范围内，并且比每个格栅壁的直径小至少五倍。网格壁的流动阻力提供了每个网格壁上的每种液体的均匀分布。由于混合室的体积可忽略不计，液体的有力混合，部分体积的部分体积以最小的时间延迟实现。

6. 发明授权

US3840343A Flame detector 失效
标题翻译：火焰探测器
公开(公告)号：US3840343A
公开(公告)日：1974-10-08
申请号：US28717072
申请日：1972-09-07
申请人： HEWLETT PACKARD GMBH
发明人： RIEDMANN M , VOGT J
IPC分类号： G01N21/72 , G01N27/62 , G01N31/12
CPC分类号： G01N27/626
摘要： In a flame detector a gas mixture to be analyzed is supplied to a flame jet and ionized. The signal derived from the ions or photons emanating from the flame are used to identify specific gas components. The signal to noise ratio with this kind of detector may be improved by surrounding the top of the flame nozzle with a annular electrode to which a negative potential relative to the potential of the nozzle is applied. It is supposed that the improved performance results from the absorption of positive carbon containing ions of organic components which otherwise would cause background noise.

7. 发明授权

US3872723A Method and apparatus for measuring the average liquid flow of a reciprocatory pump 失效
标题翻译：用于测量重复泵的平均液体流量的方法和装置
公开(公告)号：US3872723A
公开(公告)日：1975-03-25
申请号：US42641673
申请日：1973-12-19
申请人： HEWLETT PACKARD GMBH
发明人： BUSCH ULRICH
IPC分类号： G01F1/36 , G01D1/02 , G01F1/00 , G01F1/38 , G01F1/72 , G01F3/20 , G01F15/02 , G01F15/06 , G01F13/00
CPC分类号： G01F15/024 , G01F1/00 , G01F1/72 , G01F15/063
摘要： A liquid storage means and a flow passage resistant means are connected between a reciprocatory pump and the input to a liquid chromatography system. The pressure variations caused by the pumping action induce proportional variations of the storage volume of the liquid storage means. These pressure variations are sensed and supplied to a signal processing means which includes a differentiating circuit. The movement of the plunger of the pump is scanned in order to derive timing signals related to a certain portion of the pump cycle. These timing signals control the signal processing means such that output signals are obtained which are related to the pressure drop of the liquid storage means during said portion of the pump cycle. The output signals are indicative of the average liquid flow being pumped.

8. 发明授权

US3868598A Combined potentiometer and amplifier circuitry 失效
标题翻译：组合电位器和放大器电路
公开(公告)号：US3868598A
公开(公告)日：1975-02-25
申请号：US46676174
申请日：1974-05-03
申请人： HEWLETT PACKARD GMBH
发明人： FALKE REINHARD
IPC分类号： H03G3/04 , H03H7/24 , H03K6/00 , H03G3/22
CPC分类号： H03H7/24 , H03G3/04 , H03K6/00
摘要： A combined potentiometer and amplifier circuitry contains a gain controlled amplifier having its gain control input connected to a potentiometer circuit via a subtraction network. The potentiometer circuit is provided with two slidable tapping elements linked to separate actuating members and with a movable frame which limits the relative maximum distance the two actuating members can have at the same time. Thereby the dynamic range of the potentiometer output and thus of the gain controlled amplifier can be adjusted. Furthermore, a DC offset signal is derived from the output signals of the potentiometer and is combined with the output signal of the gain controlled amplifier to obtain a composed output signal the waveform whereof has a constant rise time and is not distorted relative to the waveform at the input of the gain controlled amplifier.

9. 发明授权

US3822399A Circuitry for detecting maximum values of a signal sequence 失效
标题翻译：用于检测信号序列的最大值的电路
公开(公告)号：US3822399A
公开(公告)日：1974-07-02
申请号：US28431572
申请日：1972-08-28
申请人： HEWLETT PACKARD GMBH
发明人： TRAUB S , ZEEB H , GRUND K , COURTIN E
IPC分类号： A61B5/024 , H03K5/1532 , G01R19/16
CPC分类号： H03K5/1532 , A61B5/024
摘要： Circuitry for the determination of the instants of, and the time intervals between, maximum values of signals of varying amplitude and wave form includes an idealized diode connected to a capacitor. A discriminator responsive to the termination of the charging current to the capacitor actuates a delay circuit. If no greater amplitude appears during the delay period, a switch activates a pulse generator to deliver an impulse indicative of the instant the maximum value appeared.
摘要翻译：用于确定变化幅度和波形的信号的最大值的时刻和时间间隔的电路包括连接到电容器的理想二极管。响应终止到电容器的充电电流的鉴频器启动延迟电路。如果在延迟期间没有出现更大的幅度，则开关激活脉冲发生器以输出指示出现最大值的瞬间的脉冲。

10. 发明授权

US3677709A Flame ionization detection apparatus and method 失效
标题翻译：火焰离子检测装置和方法
公开(公告)号：US3677709A
公开(公告)日：1972-07-18
申请号：US3677709D
申请日：1970-07-02
申请人： HEWLETT PACKARD GMBH
发明人： RIEDMANN MANFRED , EICHNER MARTIN
IPC分类号： G01N27/62 , G01N30/68 , G01N31/12
CPC分类号： G01N30/68 , Y10T436/16 , Y10T436/19
摘要： A FLAME IONIZATION DETECTOR FOR USE IN GAS CHROMATOGRAPHY INCLUDES A COLLECTOR RING WHICH IS POSITIONALLY ADJUSTABLE WITH RESPECT TO A FLAME NOZZLE. THE COLLECTOR RING SUPPORTS ONE OR MORE PIECES OF SALT IN AN INTERCHANGEABLE MANNER, EACH SALT BEING OPERABLE TO AMPLIFY IONIC CURRENT IN A DIFFERENT SUBSTANCE. PESTICIDE COMPONENTS SUCH AS PHOSPHORUS AND NITROGEN ARE DISTINGUISHED FROM HYDROCARBONS AND CHLORINATED SUBSTANCES BY THE DIFFERENCES IN MAGNITUDE AND POLARITY OF THE CORRESPONDING PEAKS OBTAINED ON A CHROMATOGRAM. THIS IS ACHIEVED BY OPTIMIZING THE COLLECTOR IONIC CURRENT AND GRADUALLY INCREASING THE QUANTITY OF COMBUSTIBLE GAS SUPPLIED TO THE DETECTOR.

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