Radio capsule oscillator circuit
    62.
    发明授权
    Radio capsule oscillator circuit 失效
    无线电胶囊振荡器电路

    公开(公告)号:US3739279A

    公开(公告)日:1973-06-12

    申请号:US3739279D

    申请日:1971-06-30

    发明人: HOLLIS D

    摘要: This invention relates to a Colpitts oscillator circuit for a radio capsule of the type adapted to be swallowed by a patient for investigating a condition of the gastrointestinal tract. The circuit includes a transistor as the active element and a parallel resonant LC circuit including the series combination of a variable capacitance diode and first and second capacitors, the capacitance of the second capacitor being the larger of the two in order to provide the minimum amount of positive feedback required to cause stable oscillation. The capacitance of the first capacitor, which is connected between the diode and the transistor emitter, approximates that of the diode at the lowest voltage applied to the diode by a sensor device.

    摘要翻译: 本发明涉及一种用于无线电胶囊的Colpitts振荡器电路,该电路适于被患者吞咽以调查胃肠道的状况。 该电路包括作为有源元件的晶体管和包括可变电容二极管和第一和第二电容器的串联组合的并联谐振LC电路,第二电容器的电容为两者中的较大者,以便提供最小量的 需要积极的反馈才能引起稳定的振荡。 连接在二极管和晶体管发射极之间的第一电容器的电容接近传感器装置施加到二极管的最低电压时的二极管的电容。

    Glass-ceramic articles containing strontia-,yttria-,lanthana-,and/or tantala-bearing crystal species
    64.
    发明授权
    Glass-ceramic articles containing strontia-,yttria-,lanthana-,and/or tantala-bearing crystal species 失效
    含有STRONTIA,YTTRIA-,LANTHANA-和/或TANTALA-BEARY晶体的玻璃陶瓷制品

    公开(公告)号:US3732116A

    公开(公告)日:1973-05-08

    申请号:US3732116D

    申请日:1970-10-21

    发明人: READE R

    IPC分类号: C03C10/00 C03C3/22

    CPC分类号: C03C10/0027

    摘要: THIS INVENTION RELATES TO THE PRODUCTION OF GLASS-CERAMIC ARTICLES EXHIBITING VERY LOW COEFFICIENTS OF THERMAL EXPANSION AND EXCELLENT RESISTANCE TO CREEP AT TEMPERATURES UP TO 1000*C. MORE SPECIFICALLY, THIS INVENTION IS CONCERNED WITH GLASS-CERAMIC ARTICLES CONTAINING BETASPODUMENE SOLID SOLUTION AS THE PRINCIPAL CRYSTAL PHASE WHICH ARE CRYSTALLIZED IN SITU FROM GLASS COMPOSITIONS IN THE LI2O-AL2O3-SIO2 FIELD BUT WHICH ALSO CONTAIN MINOR, BUT NECESSARY, AMOUNTS OF SRO, Y2O3, LA2O3, AND/OR TA2O5.

    Tetrasilicic mica glass-ceramic method
    65.
    发明授权
    Tetrasilicic mica glass-ceramic method 失效
    TETRASILICIC MICA玻璃陶瓷方法

    公开(公告)号:US3732087A

    公开(公告)日:1973-05-08

    申请号:US3732087D

    申请日:1971-02-24

    发明人: GROSSMAN D

    IPC分类号: C03C10/16 C03B29/00 C03C3/22

    CPC分类号: C03C10/16

    摘要: THIS INVENTION RELATES TO THE PRODUCTION OF TETRASILICIC FLUORINE MICA GLASS-CERAMIC ARTICLES FROM THE CONTROLLED HEAT TREATMENT OF CRYSTALLIZABLE GLASSES CONTAINING, IN WEIGHT PERCENT ON THE OXIDE BASIS, 45-70% SIO2, 8-20% MGO, 8-15% MGF2, A TOTAL OF 5-35% (R2O+RO), WHEREIN R2O RANGES FROM ABOUT 5-25% AND CONSISTS OF ONE OR MORE OXIDES SELECTED IN THE INDICATED PROPORTIONS FROM THE GROUP CONSISTING OF 0-20% K2O, 0-23% RB2O AND 0-25% CS2O, AND WHEREIN RO RANGES FROM 0-20% AND CONSISTS OF ONE OR MORE OXIDES SELECTED FROM THE GROUP CONSISTING OF SRO, BAO AND CDO, A TOTAL OF 0-10% OF OXIDES SELECTED FROM THE GROUP CONSISTING OF AS2O5 AND SB2O5, AND TO ABOUT 5% OF GLASS COLORANTS. THESE TETRASILICIC MICA PRODUCTS EXHIBIT GOOD MACHINABILITY WITH STEEL TOOLS, GOOD MECHANICAL STRENGTH, MODERATE THERMAL EXPANSION AND GOOD CHEMICAL DURABILITY. THE USE OF THE OPTIONAL CONSTITUENTS AS2O5, SB2O5 AND THE GLASS COLORANTS PERMITS THE PRODUCTION OF TRANSLUCENT GLASS-CERAMICS AND GLASS-CERAMICS HAVING THE APPEARANCE OF MARBLE.

    Compression sagging of sheet glass
    66.
    发明授权
    Compression sagging of sheet glass 失效
    压缩玻璃的压缩

    公开(公告)号:US3728097A

    公开(公告)日:1973-04-17

    申请号:US3728097D

    申请日:1971-04-09

    发明人: BOGNAR L

    CPC分类号: C03B23/0258 C03B29/08

    摘要: The surface characteristics of as=drawn glass sheet are provided with improved flatness uniformity by positioning such sheet between a pair of precision ground fused silica slabs and subjecting such assembly to controlled radiant heat energy for a predetermined period so as to compressibly sag the sheet between the fused silica slabs and thereby provide improved surface flatness not heretofore obtainable.

    Glass-ceramic body
    67.
    发明授权
    Glass-ceramic body 失效
    玻璃陶瓷体

    公开(公告)号:US3720526A

    公开(公告)日:1973-03-13

    申请号:US3720526D

    申请日:1971-08-12

    发明人: DUKE D MAC DOWELL J

    IPC分类号: C03C10/00 C03C3/22

    CPC分类号: C03C10/0018 C03C10/0054

    摘要: This invention relates to the manufacture of dense, fine-grained glass-ceramic articles having compositions within the Na2O and/or K2O-Al2O3-SiO2 field which are nucleated with TiO2 and/or ZrO2 and/or SnO2 and wherein the principal crystal phase is a nepheline-type crystal, i.e., a nepheline and/or kaliophilite solid solution.

    摘要翻译: 本发明涉及制造具有在TiO 2和/或ZrO 2和/或SnO 2中成核的Na 2 O和/或K 2 O-Al 2 O 3 -SiO 2场内的组成的致密的细粒玻璃陶瓷制品,其中主晶相为 霞石型晶体,即霞石和/或紫苏石固溶体。

    Quantitative chemical analysis by x-ray emission spectroscopy
    70.
    发明授权
    Quantitative chemical analysis by x-ray emission spectroscopy 失效
    X射线发射光谱的定量化学分析

    公开(公告)号:US3703726A

    公开(公告)日:1972-11-21

    申请号:US3703726D

    申请日:1970-12-31

    CPC分类号: G01N23/223 G01N2223/076

    摘要: In X-ray emission spectrometry a quantitative chemical analysis of the elements in an unknown sample is obtained. A standard, or standards, whose composition has previously been accurately established is used to determine the first order approximation to the original intensity of the most efficient excitation energy for each element being determined. The most efficient excitation energy is defined as that energy which is just greater than the energy of the absorption edge of the characteristic X-ray emission line employed in the analysis. Using the computed original intensity of the most efficient excitation energy for each element in the standard(s), the observed X-ray intensities measured on the unknown, and an assumed chemical composition of the unknown, the expected characteristic X-ray intensity for each element in the unknown is computed. The assumed chemical composition of the unknown is then adjusted by a self-consistent iterative procedure until the expected and observed X-ray intensities for each element being determined agree. In this manner the best estimate of the chemical composition of the unknown is determined.

    摘要翻译: 在X射线发射光谱法中,获得未知样品中元素的定量化学分析。 其组成以前已经准确建立的标准或标准用于确定针对确定的每个元件的最有效的激发能的原始强度的一阶近似。 最有效的激发能量被定义为刚好大于分析中使用的特征X射线发射线的吸收边的能量的能量。 使用对于标准中的每个元素的最有效的激发能的计算的原始强度,在未知物上测量的观察到的X射线强度和未知的假设化学成分,每个的预期特征X射线强度 计算未知中的元素。 然后通过自我一致的迭代程序调整未知物的假设化学成分,直到确定每个元素的预期和观察到的X射线强度是一致的。 以这种方式,确定未知物的化学成分的最佳估计。