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1. 发明授权

US4182984A Magnetic damping assembly with temperature compensator for watthour meters 失效
标题翻译：电磁阻尼装配带瓦斯电度表的温度补偿器
公开(公告)号：US4182984A
公开(公告)日：1980-01-08
申请号：US903324
申请日：1978-05-05
申请人： John A. MacFadden , James E. Ramsey
发明人： John A. MacFadden , James E. Ramsey
IPC分类号： G01R11/10 , G01R1/14
CPC分类号： G01R11/10
摘要： A watthour meter damping assembly includes a U-shaped magnetic yoke and a pair of highly coercive and anisotropic permanent magnets projecting in facing relationship from the ends of the yoke. Opposing pole faces of the magnets form an air gap receiving a meter disc to be magnetically retarded. A single temperature compensator extends over the pole faces of the permanent magnets to form a compensating shunt flux path around the air gap. The compensator and magnetic yoke extend substantially parallel to each other from the inner and outer pole faces, respectively, of the magnet pair.
摘要翻译：电度表阻尼组件包括U形磁轭和从轭的端部以面对关系突出的一对高矫顽力和各向异性永久磁体。磁铁的相对的极面形成一个接收待测磁盘的仪表盘的气隙。单个温度补偿器在永磁体的极面上延伸以形成围绕气隙的补偿分流通量路径。补偿器和磁轭分别从磁体对的内极面和外极面彼此平行地延伸。

2. 发明授权

US4449094A Temperature compensated magnetic damping assembly for induction meters 失效
标题翻译：用于感应电表的温度补偿磁阻尼组件
公开(公告)号：US4449094A
公开(公告)日：1984-05-15
申请号：US272244
申请日：1981-06-10
申请人： John A. MacFadden , Joseph M. Keever , William J. Zisa
发明人： John A. MacFadden , Joseph M. Keever , William J. Zisa
IPC分类号： G01R11/10 , G01R11/185 , G01R1/14
CPC分类号： G01R11/185 , G01R11/10
摘要： A temperature compensated magnetic damping assembly for providing a braking torque on an electroconductive disk of an induction device includes a pair of permanent magnets each having an easy axis of magnetization. Each permanent magnet provides two easy flux paths parallel to the easy axis of magnetization and separated by a dead zone. The permanent magnets are juxtaposed about a predetermined space through which the disk rotates such that the easy flux paths are perpendicular to the disk, and are aligned such that the magnetic flux passes twice through the disk in opposite directions. Flux return plates are provided adjacent to each of the permanent magnets so as to provide a flux path parallel to the disk and linking the two easy flux paths of each of the permanent magnets. In this configuration, a highly-efficient, substantially square magnetic flux loop is provided. One of the flux return plates is movable relative to the adjacent permanent magnet so as to provide series adjustment of the damping torque. Finally, a temperature sensitive magnetic shunting member extends from the north to the south pole, across the dead zone, of each of the permanent magnets so as to provide temperature compensation.
摘要翻译：用于在感应装置的导电盘上提供制动转矩的温度补偿磁阻尼组件包括一对具有易磁化轴的永磁体。每个永磁体提供两个容易的磁通路径，平行于容易的磁化轴并且被死区分开。永久磁铁围绕盘旋转的预定空间并置，使得容易的磁通路径垂直于磁盘，并且对准，使得磁通量在相反方向上通过磁盘两次。与每个永磁体相邻设置磁通返回板，以提供平行于磁盘的磁通路径，并且连接每个永磁体的两个易磁通路径。在这种结构中，提供了一种高效的，基本上为方形的磁通回路。一个回流板相对于相邻的永磁体是可移动的，以便提供阻尼扭矩的串联调整。最后，一个温度敏感的磁分流元件从每个永久磁铁的北极向南极延伸穿过死区，以提供温度补偿。

3. 发明授权

US4238729A Magnetic damping system having low induction magnet 失效
标题翻译：具有低感应磁铁的磁阻尼系统
公开(公告)号：US4238729A
公开(公告)日：1980-12-09
申请号：US12915
申请日：1979-02-16
申请人： John A. MacFadden , Joseph M. Keever
发明人： John A. MacFadden , Joseph M. Keever
IPC分类号： G01D11/14 , G01R11/10 , G01R11/185 , G01R1/16
CPC分类号： G01D11/14 , G01R11/10 , G01R11/185
摘要： A magnetic damping system for induction devices having electroconductive disk armatures includes a low induction, high coercive force magnet that is vertically elongated and has a horizontal direction of magnetization parallel to the disk. Flux concentrating pole pieces adjoin the magnet pole faces for vertically directing two closely spaced braking magnetic fields from a pair of pole tips and into the disk. A temperature compensating arrangement covers the sides of the permanent magnet between the edges of the pole pieces to efficiently compensate for higher reversible temperature coefficients of magnet remanence.
摘要翻译：具有导电盘电枢的感应装置的磁阻尼系统包括垂直伸长并具有平行于盘的磁化水平方向的低感应高矫顽力磁体。磁通集中极片邻接在磁极面上，用于垂直地将两个紧密间隔的制动磁场从一对磁极尖端引导到磁盘中。温度补偿装置覆盖极片边缘之间永磁体的侧面，以有效地补偿磁体剩磁的更高的可逆温度系数。

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