公开(公告)号：US3864234A

公开(公告)日：1975-02-04

申请号：US35836973

申请日：1973-05-08

Applicant: SMITH CORP A O

Inventor： WASSON LOERWOOD C

IPC: B65D90/04 ,  C23F13/00 ,  C23F13/02 ,  F24H1/18 ,  F24H1/00 ,  F24H1/20

CPC classification number: C23F13/02 ,  Y10T403/52 ,  Y10T403/77

Abstract: A cathodically protected lined water heater tank in which zinc rich paint is employed between the tank of the water heater and fittings, threaded or otherwise secured to the tank. The zinc rich paint acts as a distributed or secondary anode to charge exposed metal at the location of the paint with a protective potential against corrosion and also as a sealant which increases in volume for increased sealing effect when products of corrosion are produced as the zinc rich paint reacts with the water in the water heater. The zinc rich paint is used in combination with a primary zinc anode extending within the fluid stored in the water heater.

Abstract translation: 一种阴极保护的内衬热水器箱，其中在热水器的罐和配件之间使用富锌涂料，螺纹或以其他方式固定到罐。 富含锌的涂料用作分散或次级阳极，以在涂料的位置对暴露的金属进行充电，具有防腐蚀的保护作用，并且还可以作为增加体积的密封剂，以增加密封效果，当腐蚀产物作为富锌产品时 涂料与热水器中的水反应。 富含锌的涂料与在储存在热水器中的流体中延伸的初级锌阳极组合使用。

公开(公告)号：US3668493A

公开(公告)日：1972-06-06

申请号：US3668493D

申请日：1970-05-20

Applicant: SMITH CORP A O

Inventor： MAYNARD JOHN T

IPC: H02P7/292 ,  H02P5/16

CPC classification number: H02P7/293 ,  Y10S388/907 ,  Y10S388/917

Abstract: A D.C. shunt motor has the armature connected to a three-phase supply through a pair of parallel connected full-wave rectifier bridges, each having silicon controlled rectifiers in each leg. A separate NOR logic circuit controls gating of each rectifier in accordance with the proper half cycle of the applied voltage and at the desired phase angle to establish a predetermined energization level. The firing is determined by an intercept detector having a separate channel for each phase. Each channel is connected through a lag filter and a lead filter directly to the corresponding phase winding of a reference transformer to supply to the channel a voltage directly derived from the lineto-line voltage applied to the corresponding rectifier. The input to each channel is connected across a center tapped reference transformer winding and the junction of a resistor and capacitor connected across the winding. A D.C. control voltage is applied to the channels to establish a control signal pulse at the proper phase angle of the rectifier-applied voltage.

Abstract translation: 直流分流电机的电枢通过一对并联连接的全波整流桥连接到三相电源，每个桥具有每个支路中的可控硅整流器。 单独的NOR逻辑电路根据所施加的电压的适当的半周期控制每个整流器的门控，并且以期望的相位角来建立预定的通电电平。 射击由具有用于每个相的单独通道的截距检测器确定。 每个通道通过滞后滤波器和引线过滤器直接连接到参考变压器的相应相绕组，以向通道提供直接从施加到相应整流器的线间电压导出的电压。 每个通道的输入通过中心抽头参考变压器绕组和连接在绕组两端的电阻和电容器的接点连接。 将直流控制电压施加到通道以在整流器施加的电压的适当相位角处建立控制信号脉冲。

公开(公告)号：US3646874A

公开(公告)日：1972-03-07

申请号：US3646874D

申请日：1969-11-03

Applicant: SMITH CORP A O

Inventor： HAMERSKI FRANK D

IPC: A01F25/16 ,  E04H7/22

CPC classification number: A01F25/16

Abstract: A storage unit having a gas generator connected to a generally sealed storage structure for supplying a controlled atmosphere gas to the structure. The generator is controlled by initiating generator operation when the storage structure pressure declines to a predetermined differential with the ambient, and by terminating generator operation when pressure in the storage structure builds to a second predetermined differential above the value of the first. A set of pressure switches in communication with storage pressure detect the predetermined differentials and start and stop the generator through an interlocking switching circuit connecting the switches to a generator control. The interlocking switching circuit includes a timer which precludes the pressure switches from frequent starting and stopping of the generator.

Abstract translation: 一种具有气体发生器的存储单元，该气体发生器连接到大体上密封的存储结构，用于向该结构提供受控的气氛气体。 当存储结构压力下降到与环境的预定差值时，通过启动发电机操作来控制发电机，并且当存储结构中的压力建立到高于第一值的第二预定差分时终止发电机操作。 与存储压力通信的一组压力开关检测预定差速器，并通过将开关连接到发电机控制器的联锁开关电路来启动和停止发电机。 联锁开关电路包括一个定时器，其阻止压力开关频繁地起动和停止发电机。

公开(公告)号：US3630001A

公开(公告)日：1971-12-28

申请号：US3630001D

申请日：1969-04-21

Applicant: SMITH CORP A O

Inventor： HAMERSKI FRANK D

IPC: A01F25/16 ,  A23L3/3409 ,  B01D53/22 ,  A01F7/04

CPC classification number: A23L3/34095 ,  A01F25/163 ,  A01F2025/147 ,  B01D53/22

Abstract: A sealed storage system such as a silo having a breathing system including a flexible pressure-responsive member having one surface exposed to the pressure within the silo and the opposite surface exposed to atmospheric pressure. An atmosphere control apparatus is provided and includes a gas separator through which gas from the structure is circulated. The separator includes a series of membranes which selectively separate oxygen from the gas so that substantially oxygen-free gas is returned to the storage structure. The atmosphere control apparatus supplies the oxygen-free gas through a reservoir that also contains the silo breathing system.

公开(公告)号：US3624471A

公开(公告)日：1971-11-30

申请号：US3624471D

申请日：1970-04-22

Applicant: SMITH CORP A O

Inventor： JAPP LESLIE G ,  PHENIX JOHN F ,  SUTHERLAND ROBERT

IPC: H02P1/32 ,  H02P5/28

CPC classification number: H02P1/32

Abstract: A three-phase motor has three phase windings connected in a wye configuration for starting. Contactors are progressively and in timed sequence actuated to connect the wye windings into a delta configuration by varying the winding connection with at least one winding energized at all times. A circuit provides timed switching by selectively opening and then closing related contacts to selectively disconnect and connect one or more windings according to a preselected sequence to the powerlines. The timed switching minimizes current transients and establishes a smooth transition. The control circuit includes an incomplete sequence current-sensing element to disconnect the control circuit and thereby the phase windings in response to a selected excessive or extended intermediate sequence operation.

公开(公告)号：US3624343A

公开(公告)日：1971-11-30

申请号：US3624343D

申请日：1970-01-26

Applicant: SMITH CORP A O

Inventor： STJERNSTROM ERIK ,  BOLLINGER JOHN G

IPC: B23K9/02 ,  B23Q35/14 ,  G06M1/26 ,  B23K9/12

CPC classification number: B23K9/02 ,  B23Q35/14 ,  G06M1/26

Abstract: A welding electrode is positioned with a specific relationship to a horizontal plane at a constant resultant velocity. An X-axis drive motor and a Z-axis drive motor are connected to drive the electrode in mutually perpendicular directions. An angle drive motor angularly orients the electrode to the horizontal plane. A Z-axis tachometer provides a velocity signal as the input signal to an absolute function value generator, the output of which is applied to a quarter-circle signal generator. The latter includes an operational amplifier having a feedback circuit with a plurality of parallel paths each including a diode and a slope controlling resistor to successively vary the slope to produce a circle function output. This provides the proper input to the Xaxis drive. A Z-axis position transducer controls the Z-axis drive and also provides a stablilizing control input to the Xaxis drive and the angle drive.

公开(公告)号：US3614602A

公开(公告)日：1971-10-19

申请号：US3614602D

申请日：1968-12-20

Applicant: SMITH CORP A O

Inventor： CIOTTI GEORGE A

IPC: G01R5/28 ,  G01R29/12

CPC classification number: G01R5/28

Abstract: The present disclosure relates to an apparatus for measuring the charge in a flowing liquid. A pair of apertured metal discs are coaxially mounted adjacent to the peripheral portion of the main liquid stream. One disc is driven from a synchronous motor to provide an electrostatic charge-sensing device. The motor contained in an explosion proof housing, is releasably coupled to the disc assembly and includes a switch housing. A reed switch is disposed within the switch housing with an actuating permanent magnet axially spaced from the switch. A shutter is interconnected to the motor-driven shaft and extends between the switch and the magnet. The configuration of the shutter corresponds to an apertured disc. The reed switch connects the discs in an output circuit.

公开(公告)号：US3596352A

公开(公告)日：1971-08-03

申请号：US3596352D

申请日：1968-04-16

Applicant: SMITH CORP A O

Inventor： ISLER EDUARD W

IPC: H01H69/01 ,  H01H11/00 ,  H01H11/02 ,  H01H65/00

CPC classification number: H01H69/01 ,  Y10T29/49004 ,  Y10T29/49105 ,  Y10T29/49771

Abstract: This disclosure relates to a thermal bimetal operator for a multiple line control switch unit and to the method of construction. A switch housing is provided with a series of small cavities in one end wall. A bimetal strip includes an L-shaped tab which projects into the recess. A thermoset resin is disposed within the respective cavities and the bimetal strips are resiliently clamped with the outer end of the bimetal element disposed outwardly of a set position. A U-shaped trip bar is pivotally mounted within the housing with the base engaging the free ends of the bimetal strips and with an outer arm aligned with a switch blade. The switch is a snap action overcenter variety having the compensating switch arm or blade projecting laterally parallel to the trip bar and interengaged by the depending arm of the trip bar. The switch includes an adjustment screw connected to a pivot support to control the snap action position. The assembly is placed in a fixture having a support pin extending through a housing opening to support the outer arm and an adjustable tool spring loaded rod extending through an opposite housing opening into engagement with the switch blade to position the components including the bimetal strips. the fixture and assembly are placed in a curing oven which is raised to the curing temperature. Prior to the setting of the resin and after the operating temperature is established, the switch adjustment is made. The curing step is then completed.

公开(公告)号：US3592995A

公开(公告)日：1971-07-13

申请号：US3592995D

申请日：1968-11-18

Applicant: SMITH CORP A O

Inventor： HINRICHS JOHN F

IPC: H01J37/18 ,  B23K15/00

CPC classification number: H01J37/18

Abstract: This disclosure relates to an electron beam welding apparatus having a cylindrical outer housing. A plurality of equally circumferentially spaced chambers are secured to a central rotating support and project outwardly into sealing engagement with the outer housing. Operating stations are located about the assembly and include a loading station, a pair of vacuum pumping stations, a welding station and an unloading station. The welding station includes an opening through which an electron beam gun is secured to the outer portion of the housing in alignment with the opening. The gun is mounted to rotate to establish a circular weld.

公开(公告)号：US3585351A

公开(公告)日：1971-06-15

申请号：US3585351D

申请日：1969-08-25

Applicant: SMITH CORP A O

Inventor： HINRICHS JOHN F

IPC: B23K15/00 ,  B23K20/04

CPC classification number: B23K20/04 ,  B23K15/006 ,  B23K2201/06

Abstract: A tubular metal blank having two longitudinally opposed edges welded to form a seam by a process and apparatus therefor including heating the edges to a welding temperature at a first station and pressing the edges together at the first station to initially weld the edges thereof and provide extruded metal outwardly of the seam provided by the weld. Then the weld seam and extruded metal is electron beam welded at a second station with the initial weld being refined by the electron beam welding and undercutting in the weld being prevented by the formation of the extruded metal from the weld area. Additional metal may be added prior to the electron beam welding station to provide additional material at the weld seam to overcome the problem of undercutting.