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9 条记录 (耗时 0.01 秒)

    Logging apparatus for vessels
    2.
    发明授权
    Logging apparatus for vessels 失效
    船舶用记录装置

    公开(公告)号：US3604260A

    公开(公告)日：1971-09-14

    申请号：US3604260D

    申请日：1969-12-24

    申请人： EASTERN CO

    发明人： OGG ROBERT D

    IPC分类号： G01C22/02 ,  G01C21/00

    CPC分类号： G01C22/02

    摘要： Apparatus for indicating the distance travelled by a vessel comprising a counter that operates cyclically and for periods of time during each cycle which is a linear function of the velocity of the vessel. The counter is operated with a control circuit which is energized in response to an electrical output signal that is substantially proportional and linear to the velocity of a vessel and a second electrical signal that varies linearly with time between two set values.

    Wind direction indicator synchro system
    5.
    发明授权
    Wind direction indicator synchro system 失效
    风向指示器同步系统

    公开(公告)号：US3646421A

    公开(公告)日：1972-02-29

    申请号：US3646421D

    申请日：1970-02-25

    申请人： EASTERN CO

    发明人： OGG ROBERT D

    IPC分类号： G05D3/12 ,  G05B1/06

    CPC分类号： G05D3/122

    摘要： A synchro system of simple and inexpensive structure is provided which is particularly suitable for use as a wind direction indicator on sailboats. A transistorized oscillator is provided generating a current which is fed to a synchro transmitter which in turn is connected to an indicator. The indicator generates an error signal based on the phase difference between the current fed to the synchro and the position of a second synchro in the indicator and this phase difference is detected and amplified and used to operate a motor to turn the indicator. Variable damping can be employed.

    Compass card with magnetic particles
    7.
    发明授权
    Compass card with magnetic particles 失效
    具有磁性颗粒的电子卡

    公开(公告)号：US3585728A

    公开(公告)日：1971-06-22

    申请号：US3585728D

    申请日：1969-06-02

    申请人： EASTERN CO

    发明人： OGG ROBERT D

    IPC分类号： G01C17/00 ,  G01C17/04

    CPC分类号： G01C17/00

    摘要： AN IMPROVED COMPASS CARD WHEREIN THE MAGNETIC PORTION OF THE CARD IS PROVIDED IN THE FORM OF SMALL MAGNETIC PARTICLES EITHER IN THE BODY OF THE CARD AS SUCH OR AS A LAYER APPLIED OVER AT LEAST ONE FACE OF THE CARD. THE MAGNETIC PARTICLES HAVE A MAGNETIZATION OF SUBSTANTIALLY THE SAME INTENSITY WHILE THEIR DIRECTION OF MAGNETIZATION IS AT AN ANGLE OF SUBSTANTIALLY 20* TO THE AXIS OF REVOLUTION

    OF THE CARD. A CARD SO CONSTRUCTED IS FREE OF THE GYRATIONAL MOTION WHICH CHARACTERIZES CARDS USED HERETOFORE AND WHEREIN SEPARATE MAGNETS WERE SUPPORTED UPON THE CARD.