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    • 7. 发明授权
    • Counterforce spring assembly for printed circuit board test fixtures
    • 用于印刷电路板测试夹具的反力弹簧组件
    • US5698990A
    • 1997-12-16
    • US677920
    • 1996-07-10
    • James R. AussantRobert A. MorinJohn M. Winter
    • James R. AussantRobert A. MorinJohn M. Winter
    • G01R1/073G01R31/02
    • G01R1/073
    • A counterforce spring assembly for printed circuit board test fixtures is provided. A number of counterforce spring assemblies are provided in an array between the top plate and probe plate of the test fixture. Each counterforce spring assembly includes a support cup residing in an aperture through the probe plate. A compression spring resides in the support cup and provides spring-biasing of the top plate to the probe plate during the UUT testing cycle. Each counterforce spring assembly includes a circumferential flange to limit downward travel of the top plate toward the probe plate. Each assembly is small enough to fit between probe apertures corresponding to component leads of the UUT. The counterforce spring assemblies can be freely placed underneath the top plate to provide even spring-biasing thereof to prevent bowing and bending of the top plate which often causes errors in the testing of printed circuit boards.
    • 提供了一种用于印刷电路板测试夹具的反力弹簧组件。 在测试夹具的顶板和探针板之间的阵列中设置有多个反力弹簧组件。 每个反力弹簧组件包括位于穿过探针板的孔中的支撑杯。 压缩弹簧驻留在支撑杯中,并且在UUT测试周期期间将顶板弹簧偏置到探针板。 每个反作用力弹簧组件包括周向凸缘,以限制顶板朝向探针板的向下移动。 每个组件足够小以适合与UUT的元件引线相对应的探针孔之间。 反力弹簧组件可以自由地放置在顶板下方以提供均匀的弹簧偏置,以防止顶板的弯曲和弯曲,这通常会导致印刷电路板的测试误差。
    • 10. 发明授权
    • Electronic circuit breaker with withstand capability
    • 具有耐受能力的电子断路器
    • US4906967A
    • 1990-03-06
    • US249240
    • 1988-09-26
    • John M. Winter
    • John M. Winter
    • H01H77/10
    • H01H77/101H01H2071/507
    • An electronic circuit breaker having withstand capability. When the fault current exceeds the required withstand level, the mechanism force trips the circuit breaker. The forces generated by a blow-on contact loop are exerted on the various components of the operating mechanism, including the quick trip latch and secondary latch. As the fault current exceeds the required withstand level, the forces on the operating mechanism exceed the spring force holding together the quick trip latch and secondary latch. These two components rotate as one assembly during a trip operation initiated by energizing the trip coil. In the force trip operation, these two components separate unlatching the mechanism and opening the circuit breaker contacts.
    • 具有承受能力的电子断路器。 当故障电流超过要求的耐受水平时,机构的力会跳闸。 由吹塑接触回路产生的力被施加在操作机构的各个部件上,包括快速跳闸闩锁和辅助闩锁。 当故障电流超过所需的耐受水平时,操作机构上的力超过弹簧力,将弹簧力保持在一起。 在通过激励跳闸线圈启动的跳闸操作期间,这两个部件作为一个组件旋转。 在力跳闸操作中,这两个部件分开解锁机构并打开断路器触点。