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    • 1. 发明授权
    • Transformer core-coil frame attachment and ground
    • 变压器铁芯线圈架附件和地面
    • US5684446A
    • 1997-11-04
    • US730624
    • 1996-10-21
    • Herbert S. AdkinsDennis J. StruemphDean I. ParkerThomas A. Ward
    • Herbert S. AdkinsDennis J. StruemphDean I. ParkerThomas A. Ward
    • H01F27/02H01F27/26H01F27/30
    • H01F27/02H01F27/266H01F27/306
    • A transformer core-coil frame attachment and ground. The core-coil is mounted on a metal frame with flanges extending along the bottom of the frame. Nonconductive support members in the form of channels are mounted on the flanges of the cross member to support the coil to relieve stresses and reduce the no-load electrical losses. The nonconductive support members have a profile shaped for ease in receiving and retaining the support members on the flanges of the cross member. The frame has an opening in the bottom for receiving a mounting boss protruding above the tank bottom of the transformer to locate the core-coil within the tank and resist movement of the core-coil within the tank in a horizontal plane. A compressible grounding structure is attached to the bottom of the core which allows for variation between the core and frame. Bracket structure is connected to the top of the frame and to brace structure secured to one of the sidewalls within the tank to limit movement of the core-coil in the vertical plane. This one point attachment keeps the unit from shifting during shipment.
    • 变压器铁芯线圈架附件和地面。 芯线圈安装在具有沿框架底部延伸的凸缘的金属框架上。 通道形式的非导电支撑构件安装在横梁的凸缘上,以支撑线圈以减轻应力并减小空载电损耗。 非导电支撑构件具有成形以便于容纳并将支撑构件保持在横梁的凸缘上的轮廓。 框架在底部具有开口,用于接收突出在变压器的罐底部上方的安装凸台,以将芯线圈定位在罐内,并阻止芯线圈在水平面内的槽中的运动。 可压缩的接地结构附接到芯的底部,其允许芯和框架之间的变化。 支架结构连接到框架的顶部并且固定到罐内的一个侧壁的支撑结构,以限制芯线圈在垂直平面中的移动。 这一点附件在装运过程中保持装置的移动。
    • 3. 发明授权
    • Flexible intumescent coating composition
    • US5070119A
    • 1991-12-03
    • US666951
    • 1991-03-11
    • Richard M. Nugent, Jr.Thomas A. WardPaul D. GreiggerJerome A. Seiner
    • Richard M. Nugent, Jr.Thomas A. WardPaul D. GreiggerJerome A. Seiner
    • C08K13/02C09D5/18C09K21/04C09K21/12
    • C09K21/12C08K13/02C09D5/185C09K21/04Y10S521/907
    • Disclosed is an intumescent curable composition which contains as a resinous binder a flexible polyepoxide resin. The polyepoxide is cured with an appropriate curing agent adapted for the particular resin. An additive component is present which contains a mixture of materials which provide a source of(i) zinc,(ii) boron,(iii) phosphorus, and(iv) an expansion gas upon thermal decomposition. The composition is capable of forming a carbonaceous char upon exposure to heat or flame, with the proviso that the cured, unburned composition has sufficient flexibility that it passes at least 10 continuous cycles of a cold cycle test without cracking. The cold cycle test involves the following steps; the composition is applied at a thickness of 0.5 inch (12.7 millimeters) to a 10 inch (0.254 meter) section of a 4W13 I-beam having two thermocouples attached to the surface, allowed to cure at ambient temperature for 16 hours, force cured for 5 days at about 60.degree. C. an subjected to the cold cycle test. For one cycle, the beam is placed in a freezer operating at a temperature between about 0.degree. F. (-18.degree. C.) and about -10.degree. F. (-23.degree. C.) for sufficient time for the steel to reach a temperature between about 0.degree. F. (-18.degree. C.) and about (-10.degree. F.) -23.degree. C. as determined by the two thermocouples attached to the surface of the beam beneath the coating, removed from the freezer and a 50 square inch area 0.0323 square meter) of the surface warmed as shown in FIGS. 1 and 2 by passing a heat gun (Model No. HG 50146, Alpha Division of Loral Corp, 14 amp; minimum temperature at tip 500.degree. F. (260.degree. C.) a distance of 0.5 inch (12.7 millimeter) from the surface, uniformly over the surface until the surface temperature reaches 110.degree. F. (43.degree. C.) within a 3 minute period, as determined by a thermocouple moved about the surface and allowed to stand for at least 2 hours at ambient temperature.
    • 7. 发明授权
    • Automatic arc welding with filler wire
    • 带焊丝自动电弧焊
    • US4935598A
    • 1990-06-19
    • US270862
    • 1988-11-14
    • Thomas A. Ward
    • Thomas A. Ward
    • B23K9/26
    • B23K9/26
    • Automatic metal inert-gas-shielded arc welding of such apparatus as large transformer casings with stainless steel welding filler wire fed to the work through a torch from a spool. A series of seam welds are produced on each casing. The torch and spool are mounted on a movable arm of an electrically operated robot. The robot has sensing means responsive to electrical conduction through the work and the wire to position the wire in the correct location for producing each weld. The tip of the wire is oxidized during each weld of the series precluding the electrical conduction necessary to locate the wire for the next weld of the series. In accordance with the disclosure, there is provided a wire cutter displaced from work. After each weld, the robot arm positions the wire in the cutter. This positioning of the wire automatically triggers a proximity switch which actuates a high speed rotary grinder to sever the oxidized tip of the wire. The grinder moves at right angles to the wire cutting the wire squarely so that there is no bend in the resulting end of the wire to militate against accurate location by the sensor for the next weld. The grinder is composed of electrically insulating material and is mounted on an insulated fixture so that it does not shut off the robot by grounding.
    • 自动金属惰性气体保护电弧焊,如带有不锈钢焊接填充焊丝的大型变压器外壳的设备,通过手柄从阀芯送入工件。 在每个外壳上产生一系列缝焊。 手电筒和线轴安装在电动机器人的可动臂上。 机器人具有响应于通过工件和导线的导电的感测装置,以将线定位在正确的位置以产生每个焊缝。 在该系列的每个焊接期间,线的尖端被氧化,阻止了为该系列的下一个焊缝定位电线所必需的电传导。 根据本公开,提供了从工作中移开的线切割器。 每次焊接后,机器人手臂将电线定位在刀具中。 线的这种定位自动触发接近开关,该接近开关致动高速旋转研磨机以切断电线的氧化尖端。 研磨机与直线切割线直线移动,使得线的最终端部没有弯曲,从而妨碍传感器进行下一次焊接的精确定位。 研磨机由电绝缘材料组成,并安装在绝缘夹具上,使其不会通过接地来切断机器人。