Bass reflex tube for a loudspeaker
    132.
    发明授权

    公开(公告)号:US10681456B2

    公开(公告)日:2020-06-09

    申请号:US16097350

    申请日:2016-04-29

    IPC分类号: H04R1/28 H04R1/02

    摘要: The present invention refers to a loudspeaker, in especially to a bass reflex tube for a loudspeaker. Commonly, said loudspeakers include at least one woofer driver, by which an electric audio signal is transduced via a voice coil and a diaphragm into soundwaves of medium to low frequency. A bass reflex tube for a loudspeaker should be provided, which enables said loudspeaker to produce an acoustic signal according to an electrical signal, wherein the acoustic signal shows optimized an improved quality characteristics, in especially with regards to quality and accuracy of the conversion of electrical signal into the acoustic signal. The problem mentioned above is solved by a bass reflex tube for a loudspeaker, wherein said bass reflex tube is at least partially made of a ceramic material. Further, the bass reflex tube comprises a tubular portion, which is extending in an axial direction of a longitudinal axis of the bass reflex tube.

    Electromagnetic actuator as well as actuating system

    公开(公告)号:US10607758B2

    公开(公告)日:2020-03-31

    申请号:US16061838

    申请日:2016-11-23

    申请人: ETO Magnetic GmbH

    IPC分类号: H01F7/16 H01F7/08 H01F7/13

    摘要: An electromagnetic positioning device (1), having a stationary spool unit (9), having a moveably guided anchor (2), which forms a positioning section (14) and which can be axially displaced along a displacement axis (V) in response to supplying the spool unit (9) with current, as well as having a one-part cup-shaped yoke-core element (3), which receives the anchor (2) and which includes a core section (5) as well as a yoke section (6) and which has a yoke-core bottom (4) extending perpendicular to the displacement axis (V) and a yoke-core sheath extending perpendicular to the yoke-core bottom (4) along the displacement axis (V), a longitudinally cut transition area (8) reduced in thickness and arranged between the core section (5) and the yoke section (6) being realized in the yoke-core sheath. It is intended that a guide pin (17) for the anchor (2) is fixed, preferably pressed in, in a, preferably centric, guide pin recess (18) in the yoke-core bottom (4) and protrudes axially into a, preferably centric, guide opening (13) of the anchor (2) and can be displaced relative to the anchor (2) during its displacement movement.

    Electronic payment system for operating automated machine

    公开(公告)号:US10559155B2

    公开(公告)日:2020-02-11

    申请号:US15442988

    申请日:2017-02-27

    摘要: An electronic payment system is provided to comprise a mobile terminal 10 for emitting remotely operable signals, and a printing machine 11 that comprises a communications device 5 for receiving the remotely operable signals emitted from mobile terminal 10 to drive automated machine 1, an automatic payment device 6 connected to communications device 5 and a financial database 7 of a banking depository system, and a printer 51 connected to communications device 5 for printing information on a record radium for the real-time electronic transaction without credit transaction to offer goods, services or amusement to users from automated machine 1 and to dispense recording medium for users to confirm the transaction fee amount that was withdrawn from the account at financial database 7.

    Air pressure measuring device for a vehicle tire and method for assembling the air pressure measuring device

    公开(公告)号:US10543723B2

    公开(公告)日:2020-01-28

    申请号:US15561125

    申请日:2016-01-13

    发明人: Renato Palaoro

    IPC分类号: B60C23/04 B60C29/00 B60C29/02

    摘要: Air pressure measuring device (10) for a vehicle wheel (2), having a valve body (11) which constitutes a first element (31) and which can be inserted in a through-hole (5) in a vehicle wheel rim (1), having a cap nut (30) which constitutes a second element (32) for axially tensioning valve body (11) on the vehicle wheel rim (1), wherein when the air pressure measuring device (10) is in the installed state a threaded connection (35) is created between the valve body (11) and the cap nut (30), consisting of a thread (40) formed on the valve body (11) and a thread (41) formed on cap nut (30), wherein, in order to create one of the two threads (40, 41) both elements (31, 32) are made from materials of different hardnesses, a self-cutting thread (40) is produced in the element (31) that is made of the harder material, and a deforming section (39) is produced in the element (32) that is made of the softer material, in and in which the other thread (41) can be created by cooperation with the self-cutting thread (40).