Refrigeration tubing joint
    44.
    发明授权
    Refrigeration tubing joint 失效
    制冷管接头

    公开(公告)号:US4693501A

    公开(公告)日:1987-09-15

    申请号:US888593

    申请日:1986-07-23

    摘要: A heat exchanger tube assembly having one end of a copper tube soldered to the end of an aluminum tube, and a method of minimizing galvanic corrosion at the soldered joint. The aluminum tube, having a roughened inner surface for enhanced heat transfer, fits inside the copper tube at the soldered joint. A heat shrinkable thermoplastic tube having a thermosetting adhesive inner coating is placed around the joint and then heated. The heat shrinks the thermoplastic tube, causing it to contract and to adhere tightly against and around the joint. The plastic tube with its adhesive inner coating protects the joint from atmospheric moisture and thus inhibits galvanic corrosion that would eventually create a leak in the tube joint.

    摘要翻译: 一种热交换器管组件,其具有焊接到铝管的端部的铜管的一端,以及使焊接接头处的电偶腐蚀最小化的方法。 铝管具有粗糙的内表面,用于增强热传递,适合焊接在铜管内部。 将具有热固性粘合剂内涂层的热收缩热塑性管放置在接头周围,然后加热。 热收缩热塑性管,使其收缩并紧密地粘合在接头周围。 具有粘合剂内涂层的塑料管可保护接头免受大气污染,从而抑制电偶腐蚀,最终导致管接头泄漏。

    Laser drilling system utilizing photoacoustic feedback
    45.
    发明授权
    Laser drilling system utilizing photoacoustic feedback 失效
    激光钻孔系统利用光声反馈

    公开(公告)号:US4504727A

    公开(公告)日:1985-03-12

    申请号:US454913

    申请日:1982-12-30

    摘要: A laser drilling control system utilizing photoacoustic feedback is described. The control system provides an accurate monitoring of the laser drilling of a multilayered printed circuit board thereby allowing uniform drilling through layers of different optical and photoacoustic properties by both analyzing the photoacoustic feedback signals received, and adjusting optimally the laser parameters such as pulse duration, wavelength, energy, pulse repetition rate, and the number of pulses, for each successive layer. The system also provides an end point detection which prevents underdrilling overheating, and overdrilling of underlying layers and associated damages. According to another aspect of this invention, the control system can be used as a sensitive misregistration detector for aligning the laser beam to a selected drill site for subsequent drilling at the selected drill site.

    摘要翻译: 描述了利用光声反馈的激光钻孔控制系统。 控制系统提供对多层印刷电路板的激光钻孔的精确监测,从而通过分析所接收的光声反馈信号来允许通过不同光学和光声特性的层的均匀钻孔,并且最佳地调整激光参数,例如脉冲持续时间,波长 ,能量,脉冲重复率和脉冲数,对于每个连续层。 该系统还提供了一个终点检测,可以防止过度钻井过热,以及下层破裂和相关破坏。 根据本发明的另一方面,控制系统可以用作敏感对准检测器,用于将激光束对准所选择的钻孔位置,用于随后在选定的钻孔位置进行钻孔。

    Oval bell concept
    46.
    发明授权

    公开(公告)号:US4135740A

    公开(公告)日:1979-01-23

    申请号:US858304

    申请日:1977-12-07

    摘要: This invention relates to apparatus for facilitating the construction of a heat exchanger, such as a condenser or evaporator employed in an air conditioning system, wherein exchanger tubes extending through a plate fin assembly are joined together by means of return bend connections or the like. The ends of the tube are provided with an oval shaped bell in which are telescoped the return bends. Diametrically opposed nibs are formed on the outer surface of the return bend connectors near the distal end thereof. The outside diameter over the nibs is slightly larger than the minor inside diameter of the oval bell. The nibs are inserted into the bell aligned along the minor diameter of the opening. The nibs are thus caused to ride in engagement against the wall of the bell to frictionally support the connector in assembly. The joint is then immersed in a molten solder bath whereby solder flows freely into the joint region along the major axis to create a highly reliable joint.

    Apparatus for manufacturing embryonic wire coils having noduled ends
    47.
    发明授权
    Apparatus for manufacturing embryonic wire coils having noduled ends 失效
    用于制造具有结节端部的胚胎线圈线圈的装置

    公开(公告)号:US3909583A

    公开(公告)日:1975-09-30

    申请号:US36536873

    申请日:1973-05-30

    摘要: The tangling of helically coiled wire articles during bulk handling and shipment is prevented by providing integral nodules or beads of fused metal at each end of the articles which enclose the severed ends of the wire. In the case of tungsten wire coils that are designed for use in electric lamps and similar devices and are wound on iron mandrels, the fused beads are composed of tungsten-iron alloy and are formed in situ during coil manufacture by melting the ends of the mandrel with a source of concentrated heat, such as a laser, focused electron beam, plasma torch, or oxy-hydrogen flame. The tungsten-iron alloy beads remain on the end turns of the coil during the subsequent mandrel-dissolving operation, are ductile and are formed without embrittling the tungsten wire. Apparatus for manufacturing such beaded-end coils on a mass production basis using a continuous mandrel-coil stock wire and a laser is disclosed.

    摘要翻译: 螺旋卷绕的丝线制品在大批量处理和装运期间的缠结是通过在包裹线的切断端的物品的每一端处提供整体的结块或熔融金属珠来防止的。 在设计用于电灯和类似装置并且缠绕在铁芯上的钨丝线圈的情况下,熔融珠由钨 - 铁合金组成,并且通过熔化心轴的端部在线圈制造期间原位形成 具有集中热源,例如激光,聚焦电子束,等离子体焰炬或氧 - 氢火焰。 在随后的芯棒溶解操作期间,钨 - 铁合金珠保持在线圈的端匝上,是延展性的并且不会使钨丝脆化而形成。 公开了使用连续的心轴线圈原料线和激光器在批量生产基础上制造这种串珠型线圈的装置。