REFERENCE FREQUENCY GENERATOR DEVICE

    公开(公告)号:EP2437395B1

    公开(公告)日:2018-10-31

    申请号:EP10780376.9

    申请日:2010-04-15

    摘要: The disclosed is a reference frequency generating device (11), which includes a GPS receiver (21), a PLL circuit (31), a detector (28), a memory unit (29), and a controller (22). The PLL circuit (31) controls the digitally controlled oscillator (26) based on a synchronizing control signal acquired based on a reference signal from the GPS receiver (21). The memory unit (29) stores a correspondence relation between a control value of the synchronizing control signal, and a voltage value and a temperature at that time. When the reference signal is not acquired, the controller 22 determines a holdover control signal based on the correspondence relation, and the voltage and temperature detected by the detector 28, and controls the digitally controlled oscillator (26).

    DYNAMIC BACKUP RING ASSEMBLY
    7.
    发明授权
    DYNAMIC BACKUP RING ASSEMBLY 有权
    动态备份环组件

    公开(公告)号:EP2906857B1

    公开(公告)日:2017-11-22

    申请号:EP13845674.4

    申请日:2013-10-11

    摘要: A seal backup ring assembly is provided that eliminates fluid differential pressure acting radially on the backup ring, preventing collapse of the backup ring against a shaft. The backup ring is assembled so that the initial clearance (extrusion gap) between the backup ring and relatively rotating member is not affected by the differential pressure acting across the assembly. This allows for an initially small extrusion gap to be present throughout the differential pressure range.