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    Apparatus for measuring the refractive index of a solution in rotating centrifuge cells
    3.
    发明授权
    Apparatus for measuring the refractive index of a solution in rotating centrifuge cells 失效
    用于测量旋转中心细胞中解决方案的折射率的装置

    公开(公告)号：US3615140A

    公开(公告)日：1971-10-26

    申请号：US3615140D

    申请日：1969-11-07

    Applicant: STAMICARBON

    Inventor： DOORNEKAMP JOHAN G F ,  SIESWERDA BAUKE S

    IPC: G01P3/486 ,  H02P5/52 ,  G01N21/24

    CPC classification number: G01P3/486 ,  H02P5/56

    Abstract: AN APPARATUS FOR MEASURING THE REFRACTIVE INDEX OF A SOLUTION IN A ROTATING CENTRIFUGE PROVIDED WITH A MULTICELL ROTOR AND WITH A SELECTOR CIRCUIT FOR OBSERVING A GIVEN CELL WITH APPLICATION OF A LIGHT SOURCE CONTINUOUSLY OMITTING RADIATION AND A MOTOR-OPERATED ROTARY DISC, SERVING AS A GATE, WHOSE SPEED OF REVOLUTION IS DERIVED FROM THAT OF THE ROTOR, BOTH THE ROTOR AND THE DISC BEING EQUIPPED WITH MEANS FOR THE GENERATION OF PULSES WITH A FREQUENCY THAT IS DIRECTLY PROPORTIONAL TO THE NUMBER OF REVOLUTIONS AND WHEREIN USE IS MADE OF AN ELECTRONIC CONTROLLER WHICH FEEDS THE DISC DRIVE WITH PULSES OF A FREQUENCY EQUAL TO THAT OF THE ROTOR PULSES, UNLESS SAID MOTOR IS ROTATING AT TOO HIGH A SPEED, WHILE IN THE CASE OF A SYNCHRONOUS OR LAGGING SPEED OF REVOLUTION THE TIME DURATION OF THE PULSES TO BE FED TO THE MOTOR IS REDUCED BY THE PULSES GENERATED BY THE DISC IN SO FAR AS THE LATTER PULSES COME WITHIN THE TIME DURATION OF THE PULSES TO BE FED TO THE MOTOR, AND THE DISC IS COUPLED WITH A DAMPER FOR THE SUPPRESSION OF ROTATIONAL VIBRATIONS.

    Balance
    5.
    发明授权
    Balance 失效
    平衡

    公开(公告)号：US3610354A

    公开(公告)日：1971-10-05

    申请号：US3610354D

    申请日：1969-01-27

    Applicant: STAMICARBON

    Inventor： SIESWERDA BAUKE S

    IPC: G01G3/10 ,  G01G7/04 ,  G01G3/14

    CPC classification number: G01G7/04 ,  G01G3/10 ,  Y10S177/05

    Abstract: A balance having a rotatably suspended balance arm connected to a horizontally disposed tension wire; the tension wire is mechanically linked to a barrel-shaped coil holder which is rotatably mounted in a casing; a permanent magnet is fixed to the casing to extend within the coil holder; conducting coils are arranged on the exterior of the coil holder to cooperate with the magnets to restore the balance arm to an equilibrium position; the current supplied to the coils to restore the balance arm being a measure of the weight of the object placed on the balance arm.

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