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公开(公告)号:US4268410A
公开(公告)日:1981-05-19
申请号:US58542
申请日:1979-07-17
CPC分类号: C10L1/328 , B01F17/0028 , C08G63/66 , Y10S514/941 , Y10S516/01 , Y10S516/06 , Y10S516/918
摘要: Surfactants of a defined formula, typically prepared by reacting an alkoxylated hexitol fatty acid ester with a di- or tri-basic acid to induce a low degree of polymerization. The surfactants exhibit a higher viscosity in aqueous solution and in admixture with other conventional surfactants than the unpolymerized material.
摘要翻译: 通常通过使烷氧基化己糖醇脂肪酸酯与二 - 或三 - 碱性酸反应以制备低聚合度制备的定义的配方的表面活性剂。 与未聚合的材料相比,表面活性剂在水溶液中表现出较高的粘度和与其它常规表面活性剂的混合物。
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公开(公告)号:USD354058S
公开(公告)日:1995-01-03
申请号:US932043
申请日:1992-08-19
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公开(公告)号:US4985926A
公开(公告)日:1991-01-15
申请号:US161877
申请日:1988-02-29
申请人: Richard G. Foster
发明人: Richard G. Foster
CPC分类号: B06B1/0625 , H04R17/00
摘要: An improved bimorph piezoelectric transducer provides higher input impedance and allows operation at higher operating voltages. First and second piezoelectric elements have opposing electrode patterns which define a plurality of capacitors connected in series. This allows such transducers to be directly connected to high voltage audio distribution systems without the need for an impedance matching circuit.
摘要翻译: 改进的双压电晶片压电传感器提供更高的输入阻抗,并允许在较高工作电压下工作。 第一和第二压电元件具有限定串联连接的多个电容器的相对电极图案。 这使得这种传感器可以直接连接到高压音频分配系统,而不需要阻抗匹配电路。
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公开(公告)号:US4447907A
公开(公告)日:1984-05-08
申请号:US338782
申请日:1982-01-11
CPC分类号: H04B1/707
摘要: A spread spectrum modulator and a method therefor wherein a plurality of binary code generators each being at the same fraction of a desired modulation frequency and all being at equal relative phase angles are used to serially bi-phase modulate an unspread carrier signal.
摘要翻译: 一种扩展频谱调制器及其方法,其中使用多个二进制码发生器,每个二进制码发生器各自处于所需调制频率的相同分数,并且全部处于相等的相对角度,用于串行双相调制未扩展的载波信号。
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