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    • 11. 发明申请
    • Linear Motor With Patterned Magnet Arrays
    • 带图形磁铁阵列的线性电机
    • US20100052437A1
    • 2010-03-04
    • US12203523
    • 2008-09-03
    • Thomas A. FroeschleStephen J. MaguireMark A. HaynerRichard Tucker CarlmarkRajiv Suri
    • Thomas A. FroeschleStephen J. MaguireMark A. HaynerRichard Tucker CarlmarkRajiv Suri
    • H02K41/03
    • H02K41/031H02K1/2726
    • An armature for a linear motor is described. The armature includes a first of a pair of magnetic structures comprising a first plurality of maglettes each having a magnetic polarity vector; an angle between two adjacent magnetic polarity vectors in the first plurality of maglettes having a first magnitude; and a second of the pair of magnetic structures comprising a second plurality of maglettes each having a magnetic polarity vector; an angle between two adjacent magnetic polarity vectors in the second plurality of maglettes having a second magnitude, the first plurality of maglettes including a first outer maglette that is adjacent to a second outer maglette of the second plurality of maglettes, an angle between the magnetic polarity vectors of the first and second outer maglettes having a third magnitude that is different than at least one of the first and the second magnitudes.
    • 描述了用于线性电动机的电枢。 电枢包括一对磁性结构中的第一个,包括具有磁极性矢量的第一多个小磁体; 所述第一多个小磁珠中的两个相邻磁极性矢量之间的角度具有第一量值; 并且所述一对磁性结构中的第二个包括具有磁极性矢量的第二多个小磁体; 所述第二多个小磁珠中的两个相邻磁极性矢量之间的角度具有第二大小,所述第一多个小磁体包括与所述第二多个小磁珠的第二外部小磁体相邻的第一外部小磁体,所述磁极性 第一和第二外部小磁体的矢量具有不同于第一和第二幅度中的至少一个的第三幅度。
    • 13. 再颁专利
    • Loudspeaker enclosure with acoustical compliance resonating with port
mass at frequency below system resonance
    • 扬声器外壳具有声音符合性,与端口质量谐振,频率低于系统谐振
    • USRE31679E
    • 1984-09-18
    • US344353
    • 1982-02-01
    • Thomas A. FroeschleWilliam P. Schreiber
    • Thomas A. FroeschleWilliam P. Schreiber
    • H04R1/28
    • H04R1/2819H04R1/227H04R1/2826H04R1/2834H04R3/12
    • A multiple driver loudspeaker system comprises two angularly spaced rear rectangular baffles each nearly filled with four closely spaced full-range small loudspeakers with a port tube passing through the center of each rear baffle and the junction therebetween. A front baffle carries a small centrally located loudspeaker. The front loudspeaker is backed by a cavity that is vented through the port tube at the intersection between the rear baffles. Each of the remaining loudspeakers is backed by a cavity with the four cavities associated with each rear baffle being vented through the associated port tube through channels located at the front of each cavity. Two bullets are cantilevered from the front baffle rearward and essentially concentric within the respective centrally located ports. The volume of each of the nine cavities is substantially the same. The nine loudspeakers are connected in phase and in series and energized through an active equalizer having a sharp low-frequency cutoff that prevents the loudspeakers from being energized with appreciable energy much below the port tube and cavity resonance of each ported enclosure, typically 40 Hz while coacting with the loudspeakers to provide substantially uniform acoustic power radiation over substantially the full audio frequency range. In an alternative embodiment of the invention there is a common cavity behind eight drivers, and a pair of port tubes include damping material inside to lower the Q of the resonant elements comprising the cavity and port tubes. .Iadd.