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公开(公告)号：US06242707B1
公开(公告)日：2001-06-05
申请号：US09386778
申请日：1999-08-31
申请人： Hemant K. Mody , Anil R. Duggal
发明人： Hemant K. Mody , Anil R. Duggal
IPC分类号： H01H930
CPC分类号： H01H9/302
摘要： A current limiting device for protecting electrical circuits has a case and a pair of separable electrodes disposed within the case. Each electrode has a plurality of openings with an ablative member abutting the openings at an outer surface of the electrode. A spring is disposed between each ablative member and the case for urging the electrodes together. When the electrical current exceeds a predetermined setpoint the electrodes separate and an arc is created between the electrodes. The arc heats the ablative member causing expulsion of gasses which further increase the gap resistance and cool the arc to thereby quenching the arc. In a second embodiment of the current limiting device, one of the electrodes is a fixed electrode. The ablative member is disposed about a surface of the moveable electrode with a plurality of legs passing through a plurality of openings of the moveable electrode and in contact with an inner surface of the fixed electrode. A plurality of ablative member springs urges the ablative member against the fixed electrode and a plurality of electrode springs urge the movable electrode against the fixed electrode. In the second embodiment the efficiency of the expulsion of gasses is increased because the legs of the ablative member are positioned within the arc.
摘要翻译： 用于保护电路的限流装置具有设置在壳体内的壳体和一对可分离电极。 每个电极具有多个开口，其中烧蚀构件邻接电极外表面处的开口。 每个烧蚀构件和用于将电极一起推动的壳体之间布置有弹簧。 当电流超过预定的设定点时，电极分离并在电极之间产生电弧。 电弧加热烧蚀构件导致气体排出，这进一步增加间隙电阻并冷却电弧，从而淬火电弧。 在限流装置的第二实施例中，电极之一是固定电极。 烧蚀构件围绕可动电极的表面设置，多个腿穿过可移动电极的多个开口并与固定电极的内表面接触。 多个烧蚀构件弹簧将可消除构件推向固定电极，并且多个电极弹簧将可动电极推向固定电极。 在第二实施例中，由于烧蚀构件的腿位于弧内，所以排出气体的效率增加。
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公开(公告)号：US5866864A
公开(公告)日：1999-02-02
申请号：US891970
申请日：1997-07-14
CPC分类号： H01H9/446 , H01H9/36 , H01H2009/365 , H01H2009/367 , H01H33/596 , H01H9/342 , H01H9/443
摘要： An electric arc extinguishing mechanism is provided for an electric current switching apparatus of the type having a pair of contacts which selectively engage to complete an electric circuit. The mechanism includes a plurality of splitter plates located adjacent to the contacts and formed of electrically conductive material. Each splitter plate has a body of electrically conductive material, and a casing with a pair of planar portions on opposite sides of the body and connected by the curved edge portion. The edge portion is adjacent the contacts with the planar portions extending from the edge portion in an open loop having a gap. Any arc introduced between adjacent splitter plates moves around the open loop before being extinguished thereby not residing in one spot long enough to cause gross melting and associated erosion of the splitter plate.
摘要翻译： 为具有选择性地接合以完成电路的一对触点的电流开关装置提供一种电弧消除机构。 该机构包括多个分隔板，其位于邻近触点并由导电材料形成。 每个分离板具有导电材料体，以及具有一对平面部分的壳体，该壳体在主体的相对侧上并由弯曲的边缘部分连接。 边缘部分与具有间隙的开环中从边缘部分延伸的平面部分的触点相邻。 在相邻的分隔板之间引入的任何电弧在熄灭之前围绕开环移动，从而不会在足够长的时间内驻留在一个点中，从而导致分流板的大量熔化和相关的侵蚀。
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公开(公告)号：US4847726A
公开(公告)日：1989-07-11
申请号：US132731
申请日：1987-12-14
申请人： Hemant K. Mody
发明人： Hemant K. Mody
CPC分类号： H01F7/1646 , H01F7/122
摘要： A magnetic actuator is disclosed in which a member formed of a magnetic material is movable relative to a frame along a predetermined path. Magnets are located on the frame at opposite ends of the path. In order to keep the mass of the movable member as small as possible, no magnetic elements are located on the member. Permanent magnets function with the magnets at opposite ends of the path to move the member, support the member along one degree of freedom, and hold the member in a rest position.
摘要翻译： 公开了一种磁性致动器，其中由磁性材料形成的构件可相对于沿预定路径的框架移动。 磁铁位于路径两端的框架上。 为了保持可动部件的质量尽可能小，部件上没有磁性元件。 永磁体与磁体在路径的相对端处起作用以移动构件，沿着一个自由度支撑构件，并将构件保持在静止位置。
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公开(公告)号：US4724452A
公开(公告)日：1988-02-09
申请号：US926616
申请日：1986-11-03
申请人： Hemant K. Mody , David L. White , Ashok Murthy
发明人： Hemant K. Mody , David L. White , Ashok Murthy
CPC分类号： G03B9/36
摘要： A shutter is disclosed for use as a high-speed shutter in a camera or an electronic device. The shutter comprises a planar aperture blade which is mounted for reciprocative movement. The aperture blade includes a coil which is part of an electromagnetic actuator. A permanent magnet is mounted adjacent the blade for interaction with a magnetic field produced by the coil. In order to provide for a low-friction support, the aperture blade is supported on flexible connectors located on opposite sides of the blade. A current of one polarity is supplied to the coil to move the aperture blade in one direction, and the polarity of the current is reversed to move the blade in the opposite direction.
摘要翻译： 公开了一种用于相机或电子设备中的高速快门的快门。 快门包括安装成往复运动的平面孔径叶片。 光圈叶片包括作为电磁致动器的一部分的线圈。 永久磁铁安装在刀片附近，与线圈产生的磁场相互作用。 为了提供低摩擦支撑，光圈叶片被支撑在位于叶片相对侧上的柔性连接器上。 一个极性的电流被提供给线圈以沿一个方向移动孔径叶片，并且电流的极性反转以沿相反方向移动叶片。
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