Drive shield
    112.
    发明授权
    Drive shield 失效
    驱动屏蔽

    公开(公告)号:US4112696A

    公开(公告)日:1978-09-12

    申请号:US790813

    申请日:1977-04-25

    IPC分类号: E21D9/00 E21D9/06 E01G3/02

    CPC分类号: E21D9/005 E21D9/0692

    摘要: A drive shield for use in tunnelling operations includes a generally cylindrical cutting edge supported by a frame. A knife shield is telescoped together with the cutting edge, the knife shield having a plurality of elongate members (or planks). Each of the planks is extensible relative to the cutting edge in the direction of tunnel advance. In use, all the planks are advanced relative to the cutting edge which is then advanced in a follow-up sequence.

    Method of insulating rotor plates
    113.
    发明授权
    Method of insulating rotor plates 失效
    绝缘转子板的方法

    公开(公告)号:US3932691A

    公开(公告)日:1976-01-13

    申请号:US403754

    申请日:1973-10-05

    CPC分类号: H01B3/46 H02K1/04 H02K15/0012

    摘要: The invention relates to a method for insulating rotor plates for electric motors by coating the rotor plates with a solution containing organo-silicon compounds, drying the coated plates and thereafter contacting the coated plates with a steam atmosphere to form a blue iron-oxide film thereon.

    摘要翻译: 本发明涉及一种用于通过用含有机硅化合物的溶液涂覆转子板的方法来绝缘电动机的转子板,干燥涂覆的板,然后使其与蒸汽气氛接触以在其上形成蓝色氧化铁膜 。