中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

1191 records (took 0.019 seconds)

    Welding apparatus
    81.
    发明授权
    Welding apparatus 失效

    公开(公告)号：US3581051A

    公开(公告)日：1971-05-25

    申请号：US3581051D

    申请日：1968-07-29

    Applicant: NAT RES DEV

    Inventor： BROWN KENNETH WILLIAM

    IPC: B23K9/10

    CPC classification number: B23K9/10

    Abstract: In a consumable electrode arc welding process different combinations of the various parameters (open circuit arc voltage, wire feed speed, series inductance, shielding gas) are stored on a plug board by interconnecting each input bus with preselected output buses. The input buses are connected through a selector switch to a voltage source. As the selector switch is moved through its different positions a voltage is applied to the different input buses in turn. The output buses are connected to relays which control the selection of the different parameters.

    High pressure containers for cyclically varying pressures
    82.
    发明授权
    High pressure containers for cyclically varying pressures 失效
    用于周期性压力的高压容器

    公开(公告)号：US3563080A

    公开(公告)日：1971-02-16

    申请号：US3563080D

    申请日：1967-08-11

    Applicant: NAT RES DEV

    Inventor： ALEXANDER JOHN MALCOLM ,  LENGYEL BELA

    IPC: B01J3/04 ,  B21C23/00 ,  B21C27/00 ,  F15B21/00

    CPC classification number: B01J3/04 ,  B21C23/007 ,  B21C23/008 ,  B21C27/00 ,  F15B21/00

    Abstract: A HIGH PRESSURE CONTAINER, FOR EXAMPLE FOR HYDROSTATIC EXTRISON HAS A PLUNGER FOR GENERATING HIGH HYDROSTATIC PRESSURE IN THE CONTAINE AND ALSO HAS A MOVABLE WALL PORTION DEFINED BY A SURFACE OF A FLOATING MOVABLE MEMBER. AN OPPOSITE SURFACE OF THE FLATING MEMBER OF LARGER AREA FORMS A MOVABLE WALL SURFACE IN A LOWER PRESSURE CHAMBER. CONSEQUENTLY, THE PRESSURE IN THE LOWER PRESSURE CHAMBER IS ALWAYS LESS THAN BUT PROPORTIONAL TO THE PRESSURE IN THE HIGH PRESSURE CHAMBNER. THE LOWER PRESSURE THUS GENERATED IS APPLIED AROUND THE OUTER CYLINDRICAL WALL SURFACE OF THE HIGH PRESSURE CHAMBER. IN THIS WAY, TENSILE HOOP STRESSES IN THE CYLINDRICAL WALL CAN BE ELIMINATED THROUGHOUT A WORKING CYCLE WITHIN THE HIGH PRESSURE CHAMBER. THE LIFE OF THE HIGH PRESSURE CHAMBER IS INCREASED SINCE THE RISK OF FATIGUE FAILURE IS REDUCED.

    Machine tool control systems
    83.
    发明授权
    Machine tool control systems 失效

    公开(公告)号：US3561301A

    公开(公告)日：1971-02-09

    申请号：US3561301D

    申请日：1968-01-19

    Applicant: NAT RES DEV

    Inventor： SHARP ROYDS ,  BATH MALCOLM

    IPC: B23Q15/00 ,  B23B25/06

    CPC classification number: B23Q15/00 ,  Y10T82/25 ,  Y10T82/2531 ,  Y10T82/2541

    Abstract: A CONTROL SYSTEM FOR A MACHINE TOOL COMPRISING A MOTOR BY WHICH THE TOOL CAN BE MOVED RADIALLY TOWARDS AND AWAY FROM THE AXIS OF ROTATION OF A WORKPIECE AT SUCH A SPEED THAT IN USE THE TOOL CAN MAINTAIN THE CIRCULARITY OF THE WORKPIECE EVEN IF THE WORKPIECE IS SOMEWHAT ECCENTRIC FROM THE AXIS OF ROTATION, THE SYSTEM INCLUDING FIRST AND SECOND MEASURING GAUGES AND CONTROL MEANS FOR THE MOTOR ARRANGED TO COMBINE THE OUTPUTS OF THE FIRST AND SECOND GAUGES AND TO CONTROL THE MOTOR AND SO THE RADIAL POSITION OF THE TOOL IN SUCH A MANNER THAT THE DIAMETRICAL DISTANCE BETWEEN THE PART OF THE WORKPIECE OPPOSITE THE SECOND GAUGE AND THE PART OF THE WORKPIECE ACTED ON BY THE TOOL REMAINS SUBSTANTIALLY CONSTANT.

    Electronic pulse duration modulation devices using travelling field domain phenomena
    84.
    发明授权
    Electronic pulse duration modulation devices using travelling field domain phenomena 失效
    电子脉冲持续时间调制装置使用旅行领域域名

    公开(公告)号：US3559069A

    公开(公告)日：1971-01-26

    申请号：US3559069D

    申请日：1968-12-06

    Applicant: NAT RES DEV

    Inventor： HARTNAGEL HANS LUDWIG

    IPC: H03K7/08

    CPC classification number: H03K7/08

    Abstract: IN A PLUSE DURATION MODULATION DEVICE TRAVELLING DOMAINS ARE NUCLEATED BY THE GUNN EFFECT OR THE LIKE AND THE PATH LENGTHS OF THE DOMAINS ARE VARIED TO VARY THE DURATION OF SIGNAL PULSES DERIVED FROM THE DOMAINS. IN ONE FORM THE DOMAINS ARE NUCLEATED IN RESPONSE TO PERIODIC

    TRIGGER PULSES AND THE DURATION MODULATED SIGNAL PULSES ARE UTILISED IN A PULSE PHASE MODULATOR DRIVING A PHASED AERIAL ARRAY.

Patent Agency Ranking