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公开(公告)号：US20110031985A1
公开(公告)日：2011-02-10
申请号：US12721211
申请日：2010-03-10
Applicant: Timothy M. Johnson
Inventor： Timothy M. Johnson
IPC: G01R27/26
CPC classification number: G01R1/10 , G06F21/86 , G08B13/128 , G08B13/1418 , G08B13/1445 , H05K1/0215 , H05K1/0268 , H05K1/0275 , H05K1/0293 , H05K5/0208 , H05K7/1417 , H05K2201/10151 , H05K2201/10409
Abstract: An electronic device has a chassis, and a printed wiring board (PWB) having a hole. A fastener is installed in the hole thereby securing the PWB to the chassis. A pair of conductive traces is formed in the PWB. A cap, being an amount of conductive glue, covers a part of the fastener and fills an electrically insulating gap between the two traces, to thereby form a conductive path that connects the two traces. A sensing circuit is coupled to the traces, to detect a change in impedance of the path and signal a tamper event alert. Other embodiments are also described and claimed.
Abstract translation: 电子设备具有底盘和具有孔的印刷电路板（PWB）。 紧固件安装在孔中，从而将PWB固定到底盘。 在PWB中形成一对导电迹线。 作为导电胶的量的盖子覆盖紧固件的一部分并且填充两个迹线之间的电绝缘间隙，从而形成连接两个迹线的导电路径。 感测电路耦合到迹线，以检测路径的阻抗变化并发出篡改事件警报信号。 还描述和要求保护其他实施例。
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公开(公告)号：US06307292B1
公开(公告)日：2001-10-23
申请号：US09475539
申请日：1999-12-30
Applicant: David C. Brown
Inventor： David C. Brown
IPC: H02K516
CPC classification number: G01R5/14 , F16C25/08 , G01R1/10 , Y10S384/905 , Y10T29/49009 , Y10T29/49075
Abstract: A galvanometer unit comprises a limited-rotation motor, which has axial symmetry of the major motor components including axial placement of the bearings, stator drive coils, and stator back iron with respect to the magnetic center of the rotor, and which employs a cylindrical magnet having significantly uniform properties along its length. The galvanometer employs independently “hard” and “soft” preloaded bearings, which simultaneously minimize axial displacement and account for thermal expansion of the rotor assembly and which improve the overall efficiency of the galvanometer and extend the service life of the bearings.
Abstract translation: 电流计单元包括有限旋转电动机，其具有主要电动机部件的轴向对称性，包括相对于转子的磁中心的轴承，定子驱动线圈和定子后铁的轴向放置，并且采用圆柱形磁体 在其长度上具有显着均匀的特性。电流计采用独立的“硬”和“软”预加载轴承，同时最小化轴向位移并解决转子组件的热膨胀，并提高电流计的总体效率并延长使用寿命 的轴承。
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公开(公告)号：US4050021A
公开(公告)日：1977-09-20
申请号：US702457
申请日：1976-07-06
Applicant: Hans-Georg Flach , Bernhard Stier
Inventor： Hans-Georg Flach , Bernhard Stier
Abstract: A moving-coil measuring system with a large pointer deflection, utilizing a pole ring having a projection, a pole plate with a projection, a permanent magnet arranged between the projections, and a moving coil embracing the pole ring. The shaft of the coil rotates in two bushings which are concentric with respect to the pole ring. One of the bushings is mounted in the pole plate and the other bushing is mounted in a support fastened to the pole plate.
Abstract translation: 具有大指针偏转的动圈测量系统，利用具有突起的极环，具有突起的极板，布置在突起之间的永磁体和包围极环的运动线圈。 线圈的轴线以相对于极环同心的两个衬套旋转。 其中一个衬套安装在极板上，另一个衬套安装在固定在极板上的支撑件中。
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公开(公告)号：US3425392A
公开(公告)日：1969-02-04
申请号：US3425392D
申请日：1966-05-25
Applicant: AMES CO B C
Inventor： BOND ROBERT D
CPC classification number: G01R1/10
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公开(公告)号：US2886783A
公开(公告)日：1959-05-12
申请号：US65562157
申请日：1957-04-29
Applicant: ROMAN SICHO
Inventor： ROMAN SICHO
IPC: G01R1/10
CPC classification number: G01R1/10
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Patent Agency Ranking
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公开(公告)号：US919171A
公开(公告)日：1909-04-20
申请号：US1907366958
申请日：1907-04-08
Applicant: QUEEN & CO INC
Inventor： HODGE WILLIAM B
CPC classification number: G01R1/10
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