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98 条记录 (耗时 0.021 秒)

    Furnace for volatilizing materials
    61.
    发明授权
    Furnace for volatilizing materials 失效
    挥发材料炉

    公开(公告)号：US3739067A

    公开(公告)日：1973-06-12

    申请号：US3739067D

    申请日：1972-07-05

    申请人： UNIV IOWA STATE RES FOUND INC

    发明人： STAHR H ,  WUNDERLICH A

    IPC分类号： F27D11/06 ,  G01N1/00 ,  G01N21/74 ,  H05B5/12

    CPC分类号： G01N21/74 ,  F27D11/06 ,  G01N1/22

    摘要： An induction furnace for rapidly heating substances by induction to volatilize them includes a split cylindrical carbon susceptor spaced inwardly of a cylindrical outer wall and surrounding a carbon cup holding the substance for bringing the temperature of the hot zone up to as high as 2000*C. very rapidly. A metal-tometal seal is provided for sealing a tantalum rod holding the cup while permitting adjustment of the position of the cup axially of the cylindrical outer wall.

    Ground cover fruit harvesting machine
    62.
    发明授权
    Ground cover fruit harvesting machine 失效
    地盖水果收割机

    公开(公告)号：US3720051A

    公开(公告)日：1973-03-13

    申请号：US3720051D

    申请日：1971-11-26

    申请人： UNIV IOWA RES FOUND

    发明人： QUICK G

    IPC分类号： A01D46/00 ,  A01G19/00

    CPC分类号： A01D46/00

    摘要： A GROUND COVER FRUIT HARVESTING MACHINE CPMPRISES A WHEEL-MOUNTED SUPPORTING FRAME HAVING FORWARD AND REARWARD ENDS, AND HAVING A PLURALITY OF LATERALLY SOACED TOOTH ELEMENTS EXTENDING FORWARDLY THEREFROM. EACH OF THE TOOTH ELEMENTS HAS A LONGITUDINAL SLOT THEREIN. A PICKING ELEMENT IS MOUNTED FOR SLIDING MOVEMENT WITHIN EACH OF THE SLOTS OF THE TOOTH ELEMENTS, AND MEANS ARE PROVIDED FOR OSCILLATING THE OICKING ELEMENTS WITHIN THE SLOTS.

    D R A W I N G

    System for starting induction motors with self-excitation
    63.
    发明授权
    System for starting induction motors with self-excitation 失效
    自动启动感应电机系统

    公开(公告)号：US3646415A

    公开(公告)日：1972-02-29

    申请号：US3646415D

    申请日：1970-12-16

    申请人： UNIV IOWA STATE RES FOUND INC

    发明人： ROBB DAVID D

    IPC分类号： H02P1/26

    CPC分类号： H02P1/26

    摘要： A polyphase induction machine has a balanced polyphase shunt capacitor bank connected to the stator. In starting as a motor, the stator and capacitor bank are supplied with reduced line voltage by means of a transformer, and the motor is allowed to accelerate until it reaches maximum (and nearly) synchronous speed. Then, the motor is disconnected from the source and permitted to coast, whereupon there is a building up of stator voltage by self-excitation. When the phase and amplitude of the self-excited voltage are approximately equal to the phase and amplitude of the line voltage, the stator is connected directly to the line and the transformer and excitation capacitor are disconnected. The starting is accomplished with minimal dip in line voltage.

    Logical processing system
    64.
    发明授权
    Logical processing system 失效
    逻辑处理系统

    公开(公告)号：US3611309A

    公开(公告)日：1971-10-05

    申请号：US3611309D

    申请日：1969-07-24

    申请人： UNIV IOWA STATE RES FOUND INC

    发明人： ZINGG ROY J

    IPC分类号： G06F7/00 ,  G06K9/80

    CPC分类号： G06K9/80 ,  G06F7/00 ,  G06K9/38 ,  G06K9/44 ,  G06K9/64

    摘要： A number, M, of serial binary counters each having N bits are arranged so that individual bistable circuits of the counter define an M X N matrix. A number of shift registers, each adapted to temporarily store N+2 bits and to selectively shift a word up or down, are coupled via control circuitry to the counter matrix so that each counter is associated with a particular bit location in all of the registers for performing predetermined counting functions on that bit location. Control circuitry is provided for performing, in sequence, the steps: selectively shifting the contents of the registers, performing a predetermined logical function on the contents of the register, and then shifting the contents of the registers back to their original position. Any combinational Boolean function can be performed in parallel on the contents of the registers. Gating circuitry permits the selective transfer of the contents of any one counter in the matrix to a data bus, or the selective transfer of the contents of any one bit location of all of the counters to a data bus.

    Autorotating decelerating system for aerodynamic body
    65.
    发明授权
    Autorotating decelerating system for aerodynamic body 失效
    自动停机系统

    公开(公告)号：US3568961A

    公开(公告)日：1971-03-09

    申请号：US3568961D

    申请日：1969-02-26

    申请人： UNIV IOWA STATE RES FOUND INC

    发明人： IVERSEN JAMES D

    IPC分类号： B64C9/32 ,  B64D27/02 ,  F42B10/50

    CPC分类号： B64D27/023 ,  B64C9/32 ,  F42B10/50

    摘要： A system for decelerating an aerodynamic body includes at least two pair of rotor members mounted on the exterior of the body. Members of each pair are mounted at diametrically opposite locations on the body. The rotor members are adapted to rotate about axes perpendicular to the flight line of the body and thereby produce a drag on the body. By rotating the members to produce cancelling lift forces, a greatly increased drag force is induced on the body while maintaining its static stability. A modification is also disclosed for powering the rotor members.