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公开(公告)号：US3845372A
公开(公告)日：1974-10-29
申请号：US32661273
申请日：1973-01-26
发明人： GEIERSBACH A , KAESER E , GILMORE T , RINGLAND W , NEUMANN M
CPC分类号： B60K17/145 , B60K17/046 , B60K17/356 , B60L11/08 , B60L2220/14 , F02B3/06 , H02P1/46 , Y02T10/646 , Y02T10/648 , Y02T10/70 , Y02T10/7077
摘要： The wheels of a vehicle are driven by synchronous motors energized from cycloconverters controlled by signals of selectively variable magnitude and phase and modulated at motor frequency. The signals for controlling the cycloconverters are generated in the output winding of a rotary vector adder having a pair of ninety-degree displaced energizing windings inductively linked to the output winding. Maximum motor torque is available at start and the displacement angle of the motor voltage is kept to zero and motor voltage is adjusted to a magnitude which will limit motor current to a value not exceeding 125 percent of full load by a current regulated starting circuit having a first operational amplifier which compares a current feedback signal proportional to motor current to a selectively variable power signal proportional to the desired output torque from the motor and set by a foot pedal, a current control amplifier which subtracts a speed signal proportional to motor r.p.m. from the power signal to derive a current control signal which sets maximum motor current, and a variable limit clamping emitter follower which receives the output from the first operational amplifier and provides an output voltage to only one energizing winding of the rotary vector adder and clamps the magnitude of said output voltage to an upper limit which varies with the current control signal so that the voltage applied to the vector adder energizing winding decreases as motor speed increases until the starting circuit output becomes zero at a predetermined motor speed.
摘要翻译： 车辆的车轮由同步电动机驱动，该电动机由循环变频器激励，该变频器由选择性可变的幅度和相位的信号控制，并在电动机频率下进行调制。 用于控制循环换流器的信号在具有感应地连接到输出绕组的一对九十位置的激励绕组的旋转矢量加法器的输出绕组中产生。 最大电动机转矩在起动时可用，电动机电压的位移角度保持为零，电动机电压被调整到一个大小，其将通过电流调节启动电路将电动机电流限制到不超过满负载的125％ 第一运算放大器，其将与电动机电流成比例的电流反馈信号与来自电动机的期望输出转矩成比例并由脚踏板设定的选择性可变功率信号进行比较;电流控制放大器，其减去与电动机转速成比例的速度信号 从电源信号导出设定最大电动机电流的电流控制信号，以及可变限幅钳位射极跟随器，其接收来自第一运算放大器的输出，并向只有一个驱动绕组的旋转矢量加法器提供输出电压，并钳位 所述输出电压的大小变化到随着电流控制信号而变化的上限，使得施加到矢量加法器激励绕组的电压随着电动机速度增加而减小，直到起动电路输出在预定电动机速度为零。
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2.发明授权Ported rotary kiln process for direct reduction of oxides of metallic minerals 失效用于直接还原金属矿物氧化物的旋转旋转工艺
公开(公告)号：US3753682A
公开(公告)日：1973-08-21
申请号：US3753682D
申请日：1970-09-18
发明人： KOHL R
CPC分类号： C22B5/00 , C21B13/08 , C22B1/2406 , C22B1/2413 , F27B7/00 , Y02P10/136 , Y02P10/143
摘要： A process is disclosed for prereducing metallic oxide and sulfide ores to a lower state of oxidation without passing through a liquid phase, at an accelerated rate. The ore particles are preheated to 1,800* or above. An unreformed hydrocarbon fuel such as natural gas (CH4) substantially free of any oxidizing agents is passed into a bed of such preheated ore particles to pyrolytically decompose and reform portions of the fuel into strong reducing agents while in intimate contact with the oxidic metal to be reduced. Such forming of reducing agents cause at least some ore to very quickly reduce to a lower state of oxidation with an attendant solid state reorientation of metal and/or sulfur and oxygen atoms. The atomic reorientation provides increased porosity, and greater surface area is exposed to the strong reducing agents for additional and continued reduction. Portions of as yet unreformed fuel in the bed are rapidly reformed by continued pyrolysis and by reacting with oxygen and/or sulfur from the ore, to provide additional quantities of strong reducing agents.
摘要翻译： 公开了一种用于将金属氧化物和硫化物矿石预先还原成较低氧化态而不通过液相的加速速率的方法。 矿石颗粒预热至1800°或更高。 基本上不含任何氧化剂的天然气（CH4）等未改性烃类燃料进入这种预热的矿石颗粒床，以将燃料的部分热分解并重整成强还原剂，同时与氧化金属紧密接触 减少 这种还原剂的形成导致至少一些矿石非常迅速地降低到较低的氧化状态，伴随着金属和/或硫和氧原子的固态重新定向。 原子重新取向提供了增加的孔隙率，并且更大的表面积暴露于强还原剂以进行额外的和持续的还原。 通过继续热解和与来自矿石的氧和/或硫反应，迅速地改变床中尚未再成型的燃料的一部分，以提供额外量的强还原剂。
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公开(公告)号：US3734821A
公开(公告)日：1973-05-22
申请号：US3734821D
申请日：1970-12-14
发明人： CURTIS D
摘要： A headbox is disclosed having vertical flow chamber connected to a curved a tapered nozzle which defines a slice opening for jetting paper stock from the flow chamber along a that having both horizontal and vertical components and into a nip above a cylindrical forming roll and beneath a felt tangentially engaging an upper portion of the forming roll. The headbox nozzle has an upper and lower lip projecting into the nip. an adjusting mechanism is provided for the upper lip which includes a plurality of adjusting arms each connected on one end to the top of the upper lip proximate to the slice opening. the arm projects from the slice opening toward the flow chamber end of the nozzle and diverges from the upper lip to define a generally wedge-shaped space between the arm and the upperlip. A horizontal pivot is connected to the arm intermediate the ends thereof. A journal is connected to the pivot and has a like portion which spans the space between the adjusting arm and the upper lip and is connected to the upper lip. The adjusting arm is made up of a first and a second section pivotally connected by a horizontal pin at a location between the journal and the flow chamber end of the adjusting arm. The section that comprises the slice opening end of the arm has a portion projecting around the pin with a terminal end of this portion vertically spaced above the other of the section. A vertically adjustable link connects this terminal end portion of the one section, to said other of the section, to said other of the section, to provide for holding the two sections of each arm in variable preselected angular positions relative to each other for warping the upper slice lip to provide a desired profile to the upper lip. A horizontal rotatable drive shaft is mounted on the headbox adjacent the flow chamber end of the adjusting arm and this shaft has a horizontal pin attached to the periphery of the shaft which projects into a slot defined in the adjacent end which projects into a slot defined in the adjacent end of the arm. Rotation of the drive shaft raises and lowers the connected end of the adjusting arm about the pivot and bends the upper lip to vertically adjust the position of the slice opening end of the upper lip relative to the lower lip.
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公开(公告)号：US3725219A
公开(公告)日：1973-04-03
申请号：US3725219D
申请日：1965-05-04
发明人： WESOLOSKI H
IPC分类号： C25D5/10 , H01H33/668 , C23B5/52
CPC分类号： H01H33/6683 , C25D5/10
摘要： A PROCESS FOR PLATING AN ARTICLE WITH A SILVER-PALLADIUM ALLOY COMPRISES THE STEPS OF: PROVIDING THE ARTICLE WITH A CONVENTIONAL SILVER STRIKE, ELECTROPLATING THE ARTICLE IN A SILVER CYANIDE SOLUTION AT A CURRENT DENSITY OF ABOUT 10 AMPERES PER SQUARE FOOT FOR ABOUT 20 MINUTES, ELECTROPLATING THE ARTICLE IN AN AGITATING PALLADIUM CHLORIDE AND AMMONIUM CHLORIDE ACIDIC SOLUTION AT A CURRENT DENSITY OF ABOUT 4 AMPERES PER SQUARE FOOT FOR ABOUT 8 HOURS, AND HEATING THE ARTICLE AT A TEMPERATURE OF ABOUT 300 TO 400*C. FOR ABOUT 8 HOURS TO ALLOY THE SILVER AND PALLADIUM THEREON.
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公开(公告)号：US3711665A
公开(公告)日：1973-01-16
申请号：US3711665D
申请日：1971-02-16
发明人： DETHLEFSEN R
IPC分类号： H01H33/664 , H01H33/66
CPC分类号： H01H33/6643
摘要： In a vacuum type circuit interrupter having a pair of relatively movable contacts, each contact comprises a contact stud to which a relatively wider copper contact body or disk is attached. Magnetically permeable, highly resistive arc propelling means are embedded in the contact body. These means comprise a circular center portion of the same or larger diameter as the contact stud and from which (or from near which) a plurality of spirally shaped arms or vanes radiate towards the periphery of the contact. The arc propelling means create a looped current path in the contact body during contact closed position to intensify outwardly radiating magnetic forces upon contact opening to improve arc rotation thereby aiding in arc extinguishment.
摘要翻译： 在具有一对相对可动的触点的真空型断路器中，每个触点包括接触柱，相对较宽的铜接触体或盘被附接到触头螺柱。 磁性可渗透，高电阻的电弧推进装置嵌入在接触体中。 这些装置包括与接触柱相同或较大直径的圆形中心部分，并且多个螺旋形的臂或叶片（或从其附近）向接触件的周边辐射。 电弧推进装置在接触闭合位置期间在接触体中产生环路电流路径，以加强接触开口处的向外辐射磁力，以改善电弧旋转，从而有助于灭弧。
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公开(公告)号：US3706060A
公开(公告)日：1972-12-12
申请号：US3706060D
申请日：1971-05-14
发明人： GOODMAN ERNEST A
CPC分类号： H01F29/02
摘要： AN ELECTRICAL TRANSFORMER HAVING A PLURALITY OF UNTAPPED PRIMARY WINDING SECTIONS CONNECTABLE IN EITHER SERIES OR IN PARALLEL FOR ALTERNATIVELY EITHER A HIGHER PRIMARY VOLTAGE RATING OR A LOWER PRIMARY VOLTAGE RATING, A TAPPED PRIMARY WINDING SECTION CONNECTED IN SERIES WITH THE PLURALITY OF UNTAPPED WINDING SECTIONS IN BOTH THE SERIES AND IN THE PARALLEL CONNECTION THEREOF AND PERMITTING ADJUSTMENT BY A TAP CHANGER SWITCH OF THE EFFECTIVE
NUMBER OF PRIMARY TURNS, WHEREBY TO ADJUST ALTERNATIVELY EITHER THE HIGHER PRIMARY VOLTAGE RATING OR THE LOWER PRIMARY VOLTAGE RATING OF THE TRANSFORMER.-
公开(公告)号：US3706012A
公开(公告)日：1972-12-12
申请号：US3706012D
申请日：1971-05-26
发明人： PFLANZ HERBERT M
CPC分类号： H01F7/1805
摘要： AN IMPROVED DIRECT CURRENT ELECTRICAL CIRCUIT IN WHICH ANY NUMBER OF ELECTRICAL DEVICES MAY BE ENERGIZED IN PARALLEL WITH EACH OTHER TO MOMENTARILY PROVIDE A HIGHER STATE OF ENERGIZATION OF THE DEVICES, OR IN WHICH THE DEVICES MY BE ENERGIZED IN SERIES WITH EACH OTHER TO PROVIDE A LOWER STATE OF ENERGIZATION OF THE DEVICES, WITH THE CIRCUIT AUTOMICALLY REVERTING FROM THE PARALLEL ENERGIZATION STATE TO THE SERIES ENERGISATION STATE.
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公开(公告)号：US3695145A
公开(公告)日：1972-10-03
申请号：US3695145D
申请日：1970-10-27
发明人： HORN JOHN M
CPC分类号： F15B9/12
摘要： A device is disclosed which maintains the preset position of a reciprocating fluid servomotor. The device includes a spool valve with the spool connected to the servomotor piston rod. Any drifting of the servomotor piston causes the spool to open a port directing pressure fluid to the servomotor to return the piston to its preselected position.
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公开(公告)号：US3678559A
公开(公告)日：1972-07-25
申请号：US3678559D
申请日：1970-10-02
发明人： ZILKALNS JURIS
CPC分类号： F04D29/628 , Y10T29/53983
摘要： A split casing pump is provided with a bracket which pivotally supports a lifting bar. The casing half which is desired to be removed is attached to a hanger which rolls on the lift bar. After the casing half is released from the stationary portion of the pump, it is swung out of the way on the bar so that the wearing parts of the pump can be replaced. For reassembly, the removed casing half is rotated back to its original position; and because the hanger can be rolled on the lift bar, it can be eased into proper bolting position.
摘要翻译： 分体式套管泵设置有枢转地支撑提升杆的支架。 希望被去除的外壳半部分附接到在提升杆上滚动的衣架。 在壳体半部从泵的静止部分释放之后，它被摆放在杆上，使得可以更换泵的易损件。 为了重新组装，拆下的外壳半部分旋转回原来的位置; 并且因为衣架可以在升降杆上滚动，所以可以缓解到适当的螺栓位置。
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10.发明授权High voltage electrical circuit breaker with preinsertion resistor during closing 失效高压电路断路器在封闭期间使用预压电阻
公开(公告)号：US3676621A
公开(公告)日：1972-07-11
申请号：US3676621D
申请日：1971-05-28
发明人： PFLANZ HERBERT M
IPC分类号： H01H33/14 , H01H33/16 , H01H33/666
CPC分类号： H01H33/666 , H01H33/14 , H01H33/166
摘要： A high voltage circuit breaker assembly adapted to reduce voltage surges which occur on prestriking of the switch during the closing stroke, such as when switching a capacitor bank onto a high voltage distribution line. The breaker assembly includes a first and a second breaker connected in parallel paths. Each breaker may be a vacuum interrupter. An operating mechanism causes the first breaker to close in series with a resistor during the closing stroke of the operating mechanism and during a later phase of the closing operation the operating mechanism causes closing of the second breaker to bypass the resistor. The operating mechanism includes means for maintaining the first breaker which is in series with the resistor open during the opening operation of the circuit breaker assembly, whereby to insure that the resistor is not in circuit during the opening operation so that the circuit is opened by the second breaker.
摘要翻译： 一种高压断路器组件，其适于在闭合行程期间减少在开关的预起动时发生的电压浪涌，例如当将电容器组切换到高压配电线路上时。 断路器组件包括以并行路径连接的第一和第二断路器。 每个断路器可以是真空断路器。 操作机构使得第一断路器在操作机构的闭合行程期间与电阻器串联闭合，并且在关闭操作的稍后阶段期间，操作机构使第二断路器闭合以绕过电阻器。 操作机构包括用于在断路器组件的打开操作期间保持与电阻器断开串联的第一断路器的装置，从而确保在打开操作期间电阻器不在电路中，使得电路被打开 第二个断路器。
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