VIBRO-ACOUSTIC TRANSDUCER
    1.
    发明申请

    公开(公告)号:US20180279987A1

    公开(公告)日:2018-10-04

    申请号:US15471812

    申请日:2017-03-28

    发明人: Geoffrey A. BOYD

    摘要: In various embodiments, vibro-acoustic transducer arrangements in accordance herewith are optimized for sensing and transducing acoustic phenomena occurring within a patient's body, and manifesting themselves at the skin surface with frequencies ranging from 0.001 Hz to 10 kHz. Strategies for effectively coupling to the skin include judicious mismatching of mechanical impedance, the use of impedance-matching gels or liquids, a shaped (e.g., domed) pickup, material selection, and/or a peripheral leaf-spring arrangement permitting relative movement between inner and peripheral diaphragm portions. The spring stiffness or spring compliance of the leaf springs may be selectively chosen to optimize the frequency response of the sensor.

    DC induction motor driven by a unidirectional current induced in to a rotor ring

    公开(公告)号:US10720817B1

    公开(公告)日:2020-07-21

    申请号:US16154687

    申请日:2018-10-08

    发明人: Geoffrey A. Boyd

    摘要: A motor is disclosed. The motor includes a stator with a stator coil to generate a periodic unidirectional field current flowing through the stator coil and a rotor. An air gap is disposed between the stator and the rotor. The rotor has at least one rotor ring, a portion of the rotor ring is disposed in the air gap. Due to the unidirectional magnetic field, a periodic electric current is induced in the rotor ring. The electric current flowing through the portion of the rotor ring disposed in the air gap flows in a first direction to rotate the rotor relative to the stator.

    System and method for a loudspeaker with a diaphragm

    公开(公告)号:US10560778B2

    公开(公告)日:2020-02-11

    申请号:US15985408

    申请日:2018-05-21

    摘要: A loudspeaker is disclosed. The loudspeaker includes a diaphragm with a fixed portion and a movable portion. The fixed portion is attached to the movable portion by a plurality of leaf springs disposed between the fixed portion and the movable portion of the diaphragm. A coil is disposed over the diaphragm in the movable portion of the diaphragm. A magnet assembly is operatively disposed relative to the coil, wherein upon flow of current through the coil, the movable portion of the diaphragm moves relative to the fixed portion.

    DC induction motor with stator coil driven by a unidirectional field current

    公开(公告)号:US10097070B1

    公开(公告)日:2018-10-09

    申请号:US14468315

    申请日:2014-08-25

    发明人: Geoffrey A. Boyd

    IPC分类号: H02K3/00 H02K17/02 H02K3/47

    摘要: A motor is disclosed. The motor includes a stator with a stator coil to generate a periodic magnetic field and a rotor. An air gap is disposed between the stator and the rotor. The rotor has at least one rotor ring, a portion of the rotor ring is disposed in the air gap. Due to the magnetic field, a periodic current is induced in the rotor ring. The current flowing through the portion of the rotor ring disposed in the air gap flows in a first direction to rotate the rotor relative to the stator.

    Speaker with voice coil and field coil
    10.
    发明授权
    Speaker with voice coil and field coil 有权
    扬声器带音圈和励磁线圈

    公开(公告)号:US09538292B1

    公开(公告)日:2017-01-03

    申请号:US14622837

    申请日:2015-02-14

    发明人: Geoffrey A. Boyd

    IPC分类号: H04R1/00 H04R9/04 H03F3/181

    摘要: An electromagnetic voice coil actuator comprises a pot core magnet structure having a magnetic flux conductive core, a field coil within the pot core magnet structure for generating magnetic field through the magnetic flux conductive core and across an air gap, a voice coil disposed within the air gap. The voice coil and the field coil are each driven by an amplified signal derived from the audio input signal to create an actuation force, wherein the pot core magnet structure uses a soft magnet core.

    摘要翻译: 一种电磁音圈致动器包括一个具有磁通量导体芯的罐芯磁体结构,位于该磁芯磁体结构内的一个励磁线圈,用于通过该磁通导电芯产生磁场,并穿过气隙,一个位于空气中的音圈 间隙。 音圈和励磁线圈分别由从音频输入信号得到的放大信号驱动以产生致动力,其中,所述盆芯磁体结构使用软磁芯。