公开(公告)号：US4153924A

公开(公告)日：1979-05-08

申请号：US841347

申请日：1977-10-12

申请人： Richard J. Moran

发明人： Richard J. Moran

IPC分类号： H02H1/04 ,  H02H3/093 ,  H02H3/347 ,  H02H3/08

CPC分类号： H02H3/347 ,  H02H1/043 ,  H02H3/093

摘要： An inrush current restraint circuit, for use with a typical overcurrent minimum pickup circuit of a power system switching device, such as a recloser or sectionalizer, for raising the initial overcurrent minimum pickup value upon closure of the switching device to a selected value, then linearly returning this pickup value to normal within a selected period of time. The minimum pickup circuit is actuated by the voltage drop across a current sensing resistor, through which a current signal proportional to current in the power system is passed. The initial pickup overcurrent value is increased by providing another current path in parallel with the current sensing resistor when the switching device is closed. A timing capacitor is discharged each time the switching device is open, then charged from a constant current source each time the switching device is closed. The voltage across this timing capacitor is applied to the input of an amplifier having a unity voltage gain and the output of this amplifier is connected in series with a second resistor across the current sensing resistor. When the timing capacitor is charged to a voltage higher than the voltage produced across the current sensing resistor, the amplifier is back biased to effectively open the additional current path through the second resistor, and return the minimum pickup current to its normal value.

摘要翻译： 一种浪涌电流限制电路，用于电力系统开关装置（例如重合器或分段器）的典型过电流最小拾取电路，用于在将开关装置关闭时将初始过电流最小启动值提高到选定值，然后线性 在所选择的时间段内将该拾取值恢复正常。 最小拾取电路由跨过电流感测电阻器的电压降启动，电流信号与电力系统中的电流成比例。 当开关装置闭合时，通过提供与电流感测电阻并联的另​​一电流路径来增加初始拾取过电流值。 定时电容器每当开关器件打开时放电，然后每当开关器件闭合时从恒定电流源充电。 该定时电容器上的电压被施加到具有单位电压增益的放大器的输入，并且该放大器的输出端与电流检测电阻器上的第二电阻器串联连接。 当定时电容器被充电到高于电流感测电阻器两端产生的电压的电压时，放大器被反向偏置以有效地打开通过第二电阻器的附加电流路径，并将最小拾取电流返回到其正常值。

公开(公告)号：US4138988A

公开(公告)日：1979-02-13

申请号：US853034

申请日：1977-11-21

申请人： James E. Hurley

发明人： James E. Hurley

IPC分类号： F24C15/02 ,  F23M7/00

CPC分类号： F24C15/023 ,  E05Y2900/308

摘要： A hinge assembly for removably mounting an oven door on the front wall of the cabinet of a food processing oven for movement between open and closed positions with respect to the oven cavity includes a hinge plate mounted in overlying relation with respect to the front wall at one side of the oven cavity, a hinge arm on which the oven door is removably mounted pivotally attached to the hinge plate, a support arm joined pivotally at one end to the hinge arm and extending into the oven cabinet alongside the oven cavity through an aperture in the hinge plate and an aligned aperture in the front wall of the oven cabinet and a spring attached at the opposite end of the support arm and cabinet frame, to bias the oven door to a "closed door" position. The hinge assembly includes the improvement of a permanently affixed stop to prevent damage to the front wall of the oven cabinet after the door is removed from the hinge arm, because of engagement by the hinge arm if the latter is pulled forcibly by the biasing spring toward the front wall. The stop includes a pin mounted on and extending transverse the support arm for engagement with the hinge plate prior to the hinge arm engaging the front wall of the cabinet. The stop pin is ineffective to engage the hinge plate when the oven door is mounted on the hinge arm.

摘要翻译： 用于将烤箱门可拆卸地安装在食物加工烘箱的机柜的前壁上的铰链组件，用于在相对于烤箱腔的打开和关闭位置之间运动，包括铰链板，该铰链板相对于前壁以一个上方的关系安装在一个 烤箱腔的一侧，铰接臂，烤箱门可拆卸地安装在该铰链臂上，铰链臂可枢转地附接到铰链板，支撑臂在一端枢转地连接到铰链臂，并通过孔中的孔插入烤箱中 铰链板和在烤箱柜的前壁中的对准的孔和附接在支撑臂和柜框架的相对端处的弹簧，以将烤箱门偏置到“关闭的门”位置。 铰链组件包括改进永久固定的止挡件，以防止在门从铰链臂移除之后损坏烤箱柜的前壁，因为如果铰链臂被偏压弹簧强制拉动则铰链臂的接合 前墙。 该止动件包括安装在支撑臂上横向延伸的销，用于在铰链臂与机壳的前壁接合之前与铰链板接合。 当烤箱门安装在铰链臂上时，止动销无法接合铰链板。

公开(公告)号：US4134094A

公开(公告)日：1979-01-09

申请号：US793844

申请日：1977-05-05

申请人： William J. Huber

发明人： William J. Huber

IPC分类号： H01H85/055 ,  H01H85/46 ,  H01H85/06 ,  H01H85/08

CPC分类号： H01H85/46 ,  H01H85/055

摘要： A fusible element for a current limiting fuse includes two silver ribbons, each provided with a plurality of holes spaced apart along the length thereof which define fusible points of reduced cross sectional area, one of these ribbons including a conventional "M" spot consisting of a body of low melting temperature alloy such as tin-lead solder, in intimate contact with the silver ribbon. One end of each of the silver ribbons is joined to a respective end of a centrally disposed tin wire element by a copper interconnecting member. This tin wire central portion of the fusible element has a melt I.sup.2 t which is equal to or greater than that of the silver ribbons in series with it. The time-current characteristics of this fusible element at high magnitude fault currents and at low magnitude overload currents are determined respectively by the fusible points of reduced cross sectional area of the silver ribbons and by the "M" spot of one of the silver ribbons in the same way as in the fusible elements of known current limiting fuses. However, at intermediate fault currents, the tin element initiates melting of the fusible element much faster than a fusible element using only a perforated silver ribbon and a conventional "M" spot.

摘要翻译： 用于限流熔断器的可熔元件包括两个银带，每个银带设置有沿着其长度间隔开的多个孔，其限定具有减小的横截面面积的可熔点，这些带中的一个包括常规的“M”点， 低熔点合金体如锡铅焊料，与银带紧密接触。 每个银带的一端通过铜互连构件连接到中心布置的锡线元件的相应端。 可熔元件的锡线中心部分具有与其与其串联的银带的熔体I2t等于或大于的熔体I2t。 这个易熔元件在高强度故障电流和低幅值过载电流下的时间 - 电流特性分别由银色带的横截面积减小的可熔点和银色带之一的“M”点确定 与已知限流熔断器的可熔元件相同。 然而，在中间故障电流下，锡元素比仅使用穿孔的银带和常规的“M”点的可熔元件快得多地启动可熔元件的熔化。

公开(公告)号：US4129277A

公开(公告)日：1978-12-12

申请号：US765934

申请日：1977-02-07

申请人： David M. Tenniswood

发明人： David M. Tenniswood

IPC分类号： F16G13/16 ,  H02G11/00

CPC分类号： F16G13/16 ,  H02G11/006

摘要： The effective movement range of a rolling support such as a flexible chain linkage for electrical conductors and/or fluid conduits is materially increased by the provision of one or more retractable roller supports for the elevated cantilevered section of the rolling support upstream from its lower anchored end. The retractable roller support allows the rolling loop portion of the rolling support to pass through the retractable roller support in either direction. The weight of the rolling support is utilized to bias the retractable roller support toward its active supporting position.

摘要翻译： 滚动支撑件的有效移动范围，例如用于电导体和/或流体导管的柔性链节的有效移动范围通过为其下锚定端上游的滚动支撑件的升高的悬臂部分提供一个或多个可缩回的滚柱支撑而大大增加 。 可伸缩辊支撑件允许滚动支撑件的滚动环部分沿任一方向通过可缩回的辊支撑件。 滚动支撑件的重量用于将可收回的辊支撑件偏压到其主动的支撑位置。

公开(公告)号：US4125916A

公开(公告)日：1978-11-21

申请号：US759655

申请日：1977-01-17

申请人： Joseph S. King ,  Robert L. Huber

发明人： Joseph S. King ,  Robert L. Huber

IPC分类号： B24B23/02 ,  H02G1/12 ,  A46B13/02

CPC分类号： H02G1/1285 ,  B24B23/02

摘要： A power-driven tool for cleaning insulation and corrosion from conductors is portable and applies a controlled pressure established by hand. The tool employs a motor-driven abrasive drum and a pressure pad movable toward and away from the abrasive drum, with the conductor being squeezed between the pad and the drum during operation. A control for the motor is activated by the motion of the pressure pad toward the drum beyond a preestablished point, and an adjustable stop estalishes a minimum spacing between the pressure pad and the abrasive drum. A shroud covers the drum at all points except for an exposed area between the drum and the pressure pad, and a bias spring urges the pressure pad away from the drum to stop the motor upon release by the operator.

摘要翻译： 用于清洁导体绝缘和腐蚀的电力驱动工具是便携式的，并且应用手动建立的受控压力。 该工具采用电动磨轮和可移动朝向和离开研磨滚筒的压力垫，导体在操作期间被挤压在垫和滚筒之间。 马达的控制通过压力垫朝向滚筒的运动超过预先建立的点而被激活，并且可调节的止挡器在压力垫和研磨滚筒之间获得最小间距。 除了鼓和压力垫之间的暴露区域之外，护罩在所有点处覆盖鼓，偏压弹簧促使压力垫远离鼓，以在操作者释放时停止电动机。

公开(公告)号：US4124790A

公开(公告)日：1978-11-07

申请号：US555948

申请日：1975-03-06

申请人： David G. Kumbera ,  John A. Bordak

发明人： David G. Kumbera ,  John A. Bordak

IPC分类号： H01H33/666 ,  H01H33/66

CPC分类号： H01H33/666 ,  H01H2033/66246

摘要： A vacuum contact enclosure has end contact assemblies within contact enclosures specially formed to distribute the high voltage field and eliminate high stress in an encapsulating solid insulation. A non-tracking guide tube extends concentrically of a movable contact rod. A solid, dry, high voltage insulation wall intimately attaches to the vacuum and contact enclosures. The wall has an opening through which the contact rod extends with a planar end wall surface abutting a submersible operating housing. A clamp engages the wall and housing and draws the wall surface into sealing engagement with the housing. The operating mechanism includes a pivoted lever assembly connected to a spring-loaded linkage member secured to the contact operating member and a spaced drive lever and pin assembly. A toggle assembly is pinned between the assemblies and includes a releasable latch member. An extension spring is connected at opposite ends to the lever assemblies to rapidly open the contacts upon release of the latch member. A separate closing spring is connected to the lever and pin assembly. A trip-free operating handle has a reset arm engaging a pivoted arm for pivoting the lever and pin assembly to reestablish the toggle latch and simultaneously stress the both extension springs. The reset arm disengages and releases the mechanism and the closing spring pivots the reset toggle mechanism to close the contacts.

摘要翻译： 真空接触外壳具有专门形成以分布高电压场并消除封装固体绝缘体中的高应力的接触外壳内的末端接触组件。 非追踪引导管与活动接触杆同心地延伸。 牢固，干燥，高压绝缘墙与真空和接触外壳密切相连。 壁具有开口，接触杆通过该开口延伸有与潜水操作壳体邻接的平面端壁表面。 夹具接合壁和壳体，并将壁表面与壳体密封接合。 操作机构包括枢转杆组件，其连接到固定到接触操作构件的弹簧加载的联动构件和间隔开的驱动杆和销组件。 肘节组件被固定在组件之间并且包括可释放的闩锁构件。 拉伸弹簧在相对的端部连接到杠杆组件，以在释放闩锁构件时快速地打开触点。 单独的闭合弹簧连接到杠杆和销组件。 无跳闸操作手柄具有接合枢转臂的复位臂，用于枢转杠杆和销组件以重新建立肘节闩锁并且同时对两个延伸弹簧施力。 复位臂解除并释放机构，并且闭合弹簧枢转复位肘节机构以闭合触点。

公开(公告)号：US4113291A

公开(公告)日：1978-09-12

申请号：US777050

申请日：1977-03-14

申请人： Gordon Cameron

发明人： Gordon Cameron

IPC分类号： E05B13/02 ,  E05B67/38 ,  E05C1/06

CPC分类号： E05B67/383 ,  Y10S411/989 ,  Y10S70/63 ,  Y10T292/0844 ,  Y10T292/31 ,  Y10T70/5858 ,  Y10T70/796 ,  Y10T70/7977

摘要： A combination door handle and security locking system in which the conventional door latch is actuated by turning the five-sided head of an operating shaft with a special socket wrench. A hinge plate having a slot for a padlock bail and a flat index tab on its inner surface is rotated to cover the operating shaft head. The tab must fit against one side of the operating shaft head to allow the hinge plate to be fully closed so that a padlock can be inserted in the bail. The latching mechanism is designed so that this tab will fit against one side of the operating head when the door is fully latched, to thus prevent rotation of the latching mechanism. The free end of the hinge plate has an offset portion which serves both as a sleet hood for the padlock and as a handle for opening the door.

公开(公告)号：US4110496A

公开(公告)日：1978-08-29

申请号：US735020

申请日：1976-10-22

申请人： John Lapp ,  Fred S. Sadler

发明人： John Lapp ,  Fred S. Sadler

IPC分类号： H01G4/22 ,  B32B27/08

CPC分类号： H01G4/221 ,  H01G4/222 ,  Y10T428/31855 ,  Y10T428/31917

摘要： An improved dielectric system for an electrical apparatus. The dielectric system includes a polymeric film impregnated with low molecular weight polybutene having an average number molecular weight in the range of 300 to 500. The dielectric system has improved dielectrical properties and the polybutene is biodegradable which minimizes the pollution of the atmosphere if the dielectric liquid is exposed to the atmosphere. Further extended service life can be achieved by the addition of a cyclohexyl amine to the liquid dielectric.

公开(公告)号：US4090225A

公开(公告)日：1978-05-16

申请号：US761011

申请日：1977-01-21

申请人： Clyde Gilker ,  Arland D. Lamke

发明人： Clyde Gilker ,  Arland D. Lamke

IPC分类号： G01R31/00 ,  G05F1/147 ,  H01F27/40 ,  H01F29/02 ,  H02H7/055 ,  H02H7/22 ,  H02P13/04

CPC分类号： H01F29/02 ,  G01R31/00 ,  G05F1/147 ,  H01F27/402 ,  H02H7/055 ,  H01H2009/0061

摘要： A tap-changing transformer system, utilized for voltage regulation of the line potential applied to a load from a source of energy, has a non-arcing switch to protect tap contacts during a tap change. A fail-safe circuit is utilized to determine that the non-arcing switch and its associated circuitry are operating properly before a movable tap contact is transferred from one stationary tap to another. In the event that the fail-safe circuit detects an improper operation of the non-arcing switch, the source is connected directly to the load to preclude the passage of any load current through the tap-changing transformer. A particular form of transfer switch useful in effecting the connection of the source directly to the load employs a current-limiting impedance arrangement.

摘要翻译： 用于对来自能源的负载施加的线路电位的电压调节的分接变压变压器系统具有非起弧开关以在分接变换期间保护抽头接触。 使用故障安全电路来确定非起弧开关及其相关联的电路在可移动的分接触头从一个固定接头传送到另一个固定接头之前正常工作。 在故障安全电路检测到非起弧开关的不正确操作的情况下，源直接连接到负载，以阻止任何负载电流通过分接变换变压器。 用于实现源极与负载的连接的特定形式的转换开关采用限流阻抗布置。

公开(公告)号：US4070876A

公开(公告)日：1978-01-31

申请号：US707061

申请日：1976-07-20

申请人： Richard D. Thompson ,  Douglas Thompson ,  Micheal G. Beeley

发明人： Richard D. Thompson ,  Douglas Thompson ,  Micheal G. Beeley

IPC分类号： D06B1/00 ,  D06B3/30 ,  D06F73/02 ,  D06M11/54 ,  D06M13/14

CPC分类号： D06M13/127 ,  D06B3/30 ,  D06F73/02 ,  D06M11/54 ,  B65G2201/0229

摘要： Apparatus for and method of vapor phase treating garments of natural protein or cellulosic fibers such as of cotton, wool, or synthetic blends thereof each hung in substantially wrinkle-free condition on a form, with moisture, formaldehyde and an an acidic catalyst like sulfur dioxide, comprising a series of separate cabinets each having an access opening and a conveyor system through the cabinets, and means for indexing successive generally equal sized batches of such forms with garments thereon sequentially through the cabinets for simultaneous exposure of the batches in the respective cabinets to different stages of the treatment and sequentially to exposure of each batch to all stage of the treatment.