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公开(公告)号：US4320366A
公开(公告)日：1982-03-16
申请号：US916292
申请日：1978-06-16
摘要： A carrier frequency communication transmission system has a premodulation band above the transmission position of the base primary group of 60-108 kHz and utilizes mechanical filters as channel filters and also a common group filter in order to filter out the primary group band. Bending resonators having longitudinal coupling are utilized as the mechanical filters. The frequency range of the premodulation band at its lower limit is determined by a frequency spacing of at least 4 kHz from the upper band limit of the primary group band and the upper limit of the frequency range is determined in that the interfering natural oscillations, inasmuch as they occur in the lower stop band of the channel filter, lie at least 12 kHz below the lower limit of the primary group band. Highly stabilized piezo ceramics is used as the electromechanical transducer material.
摘要翻译： 载频通信传输系统具有高于60-108kHz的基本主组的传输位置的预调制频带，并且使用机械滤波器作为信道滤波器，并且还使用公共组滤波器来滤除主组频带。 具有纵向耦合的弯曲谐振器被用作机械滤波器。 在其下限处的预调制频带的频率范围由与主要组频带的上限频带之间的至少4kHz的频率间隔确定，并且由于干扰自然振荡确定频率范围的上限，因此， 因为它们出现在通道滤波器的较低阻带上，位于低于主要组带的下限以上至少12kHz。 高稳定的压电陶瓷被用作机电换能器材料。
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公开(公告)号：US4241321A
公开(公告)日：1980-12-23
申请号：US12390
申请日：1979-02-15
申请人： Yoshihiko Kasai , Takashi Gounji , Yoshio Katsube
发明人： Yoshihiko Kasai , Takashi Gounji , Yoshio Katsube
CPC分类号： H03H9/50
摘要： An electromechanical filter having minimum attenuation deviation in the pass band frequency range. The filter includes a plurality of mechanical resonators arranged substantially parallel to each other in one plane and mechanical couplers of longitudinal resonance characteristics which are disposed substantially transverse to the plurality of resonators for coupling the resonators together. The couplers have lengths which are between the first and second, and second and third oscillation modes of the longitudinal resonance characteristics. By virtue of the above structure, the couplers can be formed in a single mechanical coupling wire.
摘要翻译： 在通带频率范围内具有最小衰减偏差的机电滤波器。 滤波器包括在一个平面中基本上彼此平行布置的多个机械谐振器和纵向谐振特性的机械耦合器，其基本上横向于多个谐振器设置，用于将谐振器耦合在一起。 耦合器具有在纵向谐振特性的第一和第二和第二和第三振荡模式之间的长度。 通过上述结构，可以在单个机械耦合线中形成耦合器。
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公开(公告)号：US3984790A
公开(公告)日：1976-10-05
申请号：US487680
申请日：1974-07-11
申请人： Toshiharu Tanaka
发明人： Toshiharu Tanaka
摘要： An electromechanical reed filter has a pair of mechanically resonant reed elements each having an electromechanical transducer. The transducer coupled to a terminal by means a connecting lead is applied with a shock-absorbing member such as resilient adhesive in a position anywhere between the contact point thereof with the transducer and the terminal so that variations in the natural frequency and Q value of the reed elements caused by deformation of the connecting leads due to abnormal shock or other ambient conditions are effectively eliminated.
摘要翻译： 机电式簧片过滤器具有一对机械谐振簧片元件，每个都具有机电换能器。 通过连接引线耦合到端子的传感器在其与换能器的接触点和端子之间的任何位置处施加有诸如弹性粘合剂的减震构件，使得固有频率和Q值的固有频率和Q值的变化 由于异常冲击或其他环境条件引起的连接引线的变形引起的簧片元件被有效地消除。
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公开(公告)号：US3953662A
公开(公告)日：1976-04-27
申请号：US537313
申请日：1974-12-30
CPC分类号： H03H9/1014 , H03H9/50
摘要： A container for a mechanical filter is provided in which the internal pressure is reduced to prevent propagation in the air of sound waves to thereby prevent deterioration of the filter characteristics. A recess with an aperture therethrough is formed in one of the walls of a metal casing which constitutes the container. Further, an adhesive tape-like member is disposed on the surface of the recess in such a manner as to cover the aperture. After the casing has been evacuated through the aperture, hermetic sealing means is provided on the adhesive tape-like member within the recess.
摘要翻译： 提供了一种用于机械过滤器的容器，其中减小内部压力以防止声波在空气中的传播，从而防止过滤器特性的劣化。 在构成容器的金属外壳的一个壁中形成有通孔的凹部。 此外，以覆盖孔的方式在凹部的表面上设置胶带状构件。 在壳体已经通过孔抽真空之后，气密密封装置设置在凹部内的胶带状构件上。
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公开(公告)号：US3949326A
公开(公告)日：1976-04-06
申请号：US553711
申请日：1975-02-27
CPC分类号： H03H9/703 , H03H2250/00
摘要： Electromechanical filters of the type having a plurality of resonators coupled to each other by couplers which make it possible to provide a transmission frequency characteristic with finite-attenuation poles are disclosed. The filters have a first resonator disposed on the input side and a second resonator disposed on the output side of the filter. A plurality of third resonators, at least two in number, are disposed between the first and second resonators. The third resonators are coupled mechanically in parallel to the first and second resonators by a plurality of couplers so that one of the first and second resonators is in reverse phase relationship with one of the third resonators. Also, the coupling coefficients between the couplers differ from each other.
摘要翻译： 公开了具有通过耦合器彼此耦合的多个谐振器的类型的机电滤波器，其使得可以提供具有有限衰减极点的传输频率特性。 滤波器具有设置在输入侧的第一谐振器和设置在滤波器的输出侧的第二谐振器。 在第一和第二谐振器之间设置有至少两个数量的多个第三谐振器。 第三谐振器通过多个耦合器并联机械地耦合到第一和第二谐振器，使得第一和第二谐振器中的一个与第三谐振器之一处于反相位关系。 此外，耦合器之间的耦合系数彼此不同。
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公开(公告)号：US3931600A
公开(公告)日：1976-01-06
申请号：US472987
申请日：1974-05-24
CPC分类号： H03H9/50
摘要： In a mechanical filter, a pair of transducer elements of truncated circular cross-section are disposed at the input and output sides respectively, and they are mechanically connected in cascade to each other by means of a coupler member. The areas of the truncated cross-section of the transducer elements are made different from each other. Between said pair of transducer elements may be provided one or more resonator elements each provided with a recess and connected to each other and to said transducer elements by said coupler member. Each of the transducers and resonators are mounted on a mount base plate by means of a bent wire-like support member having a pair of legs. The foregoing mechanical filter is accommodated in a container which is pressure-reduced and hermetically sealed.
摘要翻译： 在机械滤波器中，分别在输入侧和输出侧设置一对截面圆形横截面的换能器元件，并且它们通过耦合器部件彼此级联地机械连接。 换能器元件的截面横截面的区域彼此不同。 在所述一对换能器元件之间可以设置有一个或多个谐振器元件，每个谐振器元件设置有凹部并且通过所述耦合器构件彼此连接到所述换能器元件。 每个换能器和谐振器通过具有一对腿的弯曲的线状支撑构件安装在安装基板上。 上述机械过滤器被容纳在减压和气密密封的容器中。
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47.发明授权
公开(公告)号：US3842294A
公开(公告)日：1974-10-15
申请号：US41371873
申请日：1973-11-07
申请人： NIPPON ELECTRIC CO
摘要： A torsional mode electromechanical transducer comprises a pair of rectangular ceramic pieces poled longitudinally and made integral, with a longer side surface of one of the ceramic pieces attached to a similar surface of the other and with the residual polarization directed antiparallel. A mechanical resonator having a planar surface may be used as one or each of the electrodes for exciting the transducer, with the ceramic pieces attached to the planar surface.
摘要翻译： 扭转模式机电换能器包括一对矩形陶瓷片，其纵向极化并制成一体，其中一个陶瓷片的较长侧表面附接到另一个陶瓷片的相似表面，并且剩余极化反向平行。 具有平坦表面的机械谐振器可以用作用于激发换能器的一个或每个电极，陶瓷片附接到平坦表面。
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公开(公告)号：US3823470A
公开(公告)日：1974-07-16
申请号：US18340471
申请日：1971-09-24
申请人： SIEMENS AG
发明人： ALBSMEIER H , GUNTHER A
CPC分类号： H03H9/50 , F15B15/14 , H03H3/013 , Y10T29/49004
摘要： Mechanical filters composed of mechanical resonators previously individually trimmed to design resonance frequencies, which are coupled to each other in succession by mechanical coupling elements, are subjected to trimming after assembly as determined by measurement of the coupled oscillations of the completed filter. This measurement is carried out under control of a computer appropriately linked by other equipment to the filter transducers. The computer identifies the frequencies of coupled oscillations and their differences from design values, and calculates the variation from design values of one or more elements of the corresponding filter matrix. By these values the computer develops settings for a trimming device for successively trimming elements of the filter such as resonators, or coupling elements, or both. In the most simplified arrangement and method, only variations of the null condition of one matrix element are considered, and the derived corrections are applied in equal parts to each of symmetrically disposed paired coupling elements.
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公开(公告)号：US3486136A
公开(公告)日：1969-12-23
申请号：US3486136D
申请日：1968-03-29
申请人： SIEMENS AG
发明人： TRAUB KARL
CPC分类号： H03H9/50
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