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    Piano key covers formed of ivory substitute and pianos having same
    71.
    发明公开
    Piano key covers formed of ivory substitute and pianos having same 失效
    Abdeckung aus imitiertem Ivorfüreine Pianotaste und diese Abdeckung enthaltendes钢琴。

    公开(公告)号：EP0457619A2

    公开(公告)日：1991-11-21

    申请号：EP91304488.9

    申请日：1991-05-17

    申请人： STEINWAY MUSICAL PROPERTIES, INC. ,  RENSSELAER POLYTECHNIC INSTITUTE

    发明人： Calabrese, Salvadore J. ,  Scarton, Henry A. ,  Murray, Frank S. ,  Ettles, Christopher M. ,  Kennedy, Warren C. ,  Dinc, Saim ,  Jlidi, Bessem ,  Strong, William Y.

    IPC分类号： G10C3/12

    CPC分类号： G10C3/12 ,  B44F9/06

    摘要： A piano key cover having a body of synthetic material pigmented to resemble natural ivory defines a top playing surface having a random orientation of peak-to-valley texture and a multiplicity of fine pores to replicate a surface of natural ivory. A multiplicity of the pores have diameters generally in the range of 0.0002 to 0.0012 inch (0.005 to 0.030 mm). The synthetic material is selected from the group consisting of acrylic polymer, polyurethane, epoxy and the like. A method for forming such a piano key cover and a piano having key covers of the invention are also described.

    摘要翻译： 具有着色为类似于天然象牙的合成材料的主体的钢琴键盖限定了具有峰 - 谷纹理的随机取向和多个细孔的顶部游戏表面，以复制天然象牙的表面。 多个孔具有通常在0.0002至0.0012英寸（0.005至0.030mm）范围内的直径。 合成材料选自丙烯酸聚合物，聚氨酯，环氧树脂等。 还描述了用于形成这种钢琴键盖和具有本发明的键盖的钢琴的方法。

    LIGHT EMITTING APPARATUS USING MULTIPLE COLORED RADIATION EMITTING SOURCES AND A DOWN CONVERSION, DIFFUSER ELEMENT
    75.
    发明公开
    LIGHT EMITTING APPARATUS USING MULTIPLE COLORED RADIATION EMITTING SOURCES AND A DOWN CONVERSION, DIFFUSER ELEMENT 审中-公开

    公开(公告)号：EP3531007A1

    公开(公告)日：2019-08-28

    申请号：EP19166740.1

    申请日：2007-05-29

    申请人： Rensselaer Polytechnic Institute

    发明人： NARENDRAN, Nadarajah ,  GU, Yimin

    IPC分类号： F21K9/64 ,  H01L33/50 ,  F21Y115/10 ,  H01L25/075 ,  H01L33/58

    摘要： A light emitting apparatus (710) includes: a substrate (703); a plurality of multiple colored radiation emitting sources (701) on the substrate; a down conversion material layer (706) on the plurality of multiple colored radiation emitting sources for receiving at least a portion of the multiple colored radiation emitted by the plurality of sources (701) and converting the radiation into forward transferred light radiation, or transmitted light radiation, and back transferred light radiation, or reflected light radiation; and an optic device (704) disposed on the plurality of multiple colored radiation emitting sources and coupled to the down conversion material layer. The down conversion material layer (706) of said light emitting apparatus (710) includes a plurality of down conversion materials (706A, 706B, 706C, 706D) distributed in segments having densities different from each other.

    METHODS TO FORM AND OPERATE MULTI-TERMINAL POWER SYSTEMS
    77.
    发明授权
    METHODS TO FORM AND OPERATE MULTI-TERMINAL POWER SYSTEMS 有权

    公开(公告)号：EP3072199B1

    公开(公告)日：2018-07-11

    申请号：EP14802264.3

    申请日：2014-10-31

    申请人： Rensselaer Polytechnic Institute

    发明人： SUN, Jian

    IPC分类号： H02J3/38 ,  H02J3/00 ,  H02M7/04 ,  H02M7/44

    CPC分类号： H02J3/383 ,  H02J3/00 ,  H02J3/38 ,  H02J3/386 ,  H02M7/04 ,  H02M7/44

    摘要： A method for forming and operating a multi-terminal power system, includes: connecting multiple sending terminals to a network of a power system; and local control of each sending terminal to behave as a constant-power source such that both output voltage and output current of the sending terminal may simultaneously vary in response to changing external circuit conditions while maintaining constant a product of the output voltage and the output current of the sending terminal. At least one sending terminal may include a capacitive output converter having a capacitor connected between two output terminals and a controlled current source connected in parallel to the capacitor, or an inductive output converter having an inductor connected to an output terminal and a controlled voltage source connected in series with the inductor.