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    • 2. 发明授权
    • Inverted keyboard instrument and method of playing the same
    • US09024165B2
    • 2015-05-05
    • US13066588
    • 2011-04-18
    • Ravi Sharma
    • Ravi Sharma
    • G10C3/12G10H1/34
    • G10H1/34G10H2220/221
    • An electronic keyboard instrument is provided and methods of playing and assembling the same. The instrument comprises a controller for enabling activation of electronic signals having audible, visible, amplifiable, recordable and/or like characteristics, and a power source for operating the controller. A first keyboard is provided having a first selected length and being oriented in a first direction such that (i) audible notes of music from at least one internal sound module and/or at least one external sound module, (ii) recordable data to be enhanced or modified by an external sequencer or program controlled apparatus, (iii) photoelectric signals, and (iv) processes or mechanisms, triggered or controlled by external signals or data, for controlling machines, video playback or lighting, and/or the like may be generated and/or activated using a first hand of one or more users. A second keyboard with a second selected length is generally coextensive with and oriented generally opposite to the first such that (i) audible notes of music from at least one internal sound module and/or at least one external sound module, (ii) recordable data to be enhanced or modified by an external sequencer or program controlled apparatus, (iii) photoelectric signals, and (iv) processes or mechanisms, triggered or controlled by external signals or data, for controlling machines, video playback or lighting, and/or the like may be generated and/or activated using a second hand of the one or more users. In addition, an interface connects the controller to at least one external device having sound module, and/or sequencing and signal enhancement functions. A plurality of peripheral devices operatively connected thereto permit interactive control and manipulation of the signals. Finally, a wearable support is mounted to the instrument for suspending the first and second keyboards from the user's body during instrument operation. Alternatively, the instrument is suspended by a support structure in a generally horizontal fashion for simultaneous operation by multiple users.
    • 8. 发明授权
    • Assisted drop-on-demand inkjet printer
    • 辅助按需喷墨打印机
    • US06527357B2
    • 2003-03-04
    • US09911260
    • 2001-07-23
    • Ravi SharmaJohn A. Lebens
    • Ravi SharmaJohn A. Lebens
    • B41J2938
    • B41J2/14B41J2/005
    • A droplet generator is provided that is particularly adapted for generating micro droplets of ink on demand in an inkjet printhead having a plurality of nozzles. The droplet generator includes a droplet separator formed from the combination of a droplet assistor and a droplet initiator. The droplet assistor is coupled to ink in each of the nozzles and functions to lower the amount of energy necessary for an ink droplet to form and separate from an ink meniscus extending across the nozzle outlet. The droplet assistor may be, for example, a heater or surfactant supply mechanism for lowering the surface tension of the ink meniscus. Alternatively, the droplet assistor may be a mechanical oscillator such as a piezoelectric transducer that generates oscillations in the ink sufficient to periodically form convex ink meniscus across the nozzle outlets, but insufficient to cause ink droplets to separate from the outlets. The droplet initiator cooperates with the droplet assistor and selectively causes an ink droplet to form and separate from the ink meniscus. The droplet initiator may be, for example, a thermally-actuated paddle. The droplet separator increases the speed and accuracy of ink micro droplets expelled from the printhead nozzles.
    • 提供了一种液滴发生器,其特别适于在具有多个喷嘴的喷墨打印头中根据需要生成墨滴微滴。 液滴发生器包括由液滴组合物和液滴引发剂的组合形成的液滴分离器。 液滴组合器耦合到每个喷嘴中的油墨,并且用于降低墨滴形成并与从喷嘴出口延伸的油墨弯液面分离所需的能量的量。 液滴组合器可以是例如用于降低油墨弯液面的表面张力的加热器或表面活性剂供给机构。 或者,液滴组合器可以是诸如压电换能器的机械振荡器,其产生足以周期性地形成穿过喷嘴出口的凸形墨水弯月面的墨水中的振荡,但不足以使墨滴与出口分离。 液滴引发剂与液滴组合物配合,并选择性地使油墨液滴形成并与油墨弯液面分离。 液滴引发剂可以是例如热致动桨。 液滴分离器增加从打印头喷嘴排出的墨微滴的速度和精度。
    • 10. 发明授权
    • Deformable micro-actuator with grid electrode
    • 具有栅电极的可变形微致动器
    • US06498711B1
    • 2002-12-24
    • US09708353
    • 2000-11-08
    • Ravi Sharma
    • Ravi Sharma
    • H02N200
    • G02B26/0825
    • A micro-actuator includes a body of deformable elastomer material having opposed first and second surfaces spaced apart by a predetermined at-rest dimension. A charge mechanism is coupled to one of the opposed surfaces for applying an electrical charge across the body in a first direction. The charge is spatially varied in a second direction substantially normal to the first direction so as to create spatially varied mechanical forces across the body such that body exhibits spatially varied growth in the first direction. A rigid member is associated with the second opposed surface of the body so as to move in the first direction in response to growth of the body. The charge mechanism may include a grille electrode connectable to an electrical potential source. An electrically conductive flexible layer is provided on the second surface between the second surface and the rigid member, and is connectable to the electrical potential source so as to induce a force between the flexible layer and the grille electrode upon application of an electrical field. A stationary rigid substrate is provided between the first surface and the grille electrode to establish a rigid mechanical boundary at the first surface.
    • 微致动器包括具有相对的第一和第二表面的可变形弹性体材料体,其间隔开预定的静止尺寸。 充电机构耦合到相对的表面中的一个,以在第一方向上跨过身体施加电荷。 电荷在基本上垂直于第一方向的第二方向上在空间上变化,从而在身体上产生空间上变化的机械力,使得身体在第一方向上呈现空间上变化的增长。 刚性构件与身体的第二相对表面相关联,以便响应于身体的生长而在第一方向上移动。 充电机构可以包括可连接到电位源的格栅电极。 导电柔性层设置在第二表面和刚性构件之间的第二表面上,并且可连接到电位源,以便在施加电场时在柔性层和格栅电极之间引起力。 在第一表面和格栅电极之间设置固定的刚性基底,以在第一表面建立刚性机械边界。