Method of joining optical fiber preforms and apparatus therefor
    2.
    发明申请
    Method of joining optical fiber preforms and apparatus therefor 审中-公开
    连接光纤预制棒的方法及其设备

    公开(公告)号:US20050223748A1

    公开(公告)日:2005-10-13

    申请号:US10814388

    申请日:2004-03-30

    摘要: A method of joining optical fiber preforms is disclosed wherein the optical fiber preforms are butt-welded by heating the opposing endfaces of the preforms with a heat source comprising an electric arc formed across a gap between the opposing endfaces, the electric arc being formed between at least two opposing electrodes, and thereafter contacting the opposing endfaces to join the preforms and form an elongated optical fiber preform. The elongated optical fiber preform may then be drawn into an optical fiber. Also disclosed is an apparatus for joining optical fiber preforms, and an optical fiber draw tower including the joining apparatus.

    摘要翻译: 公开了一种连接光纤预成型件的方法,其中通过用包括在相对端面之间的间隙上形成的电弧的热源加热预成型件的相对端面而将光纤预制件进行对接焊接,电弧形成在 至少两个相对的电极,然后接触相对的端面以连接预制件并形成细长的光纤预制件。 然后可以将细长的光纤预制件拉制成光纤。 还公开了一种用于连接光纤预制棒的装置和包括接合装置的光纤拉制塔。

    Exercise rowing machine
    3.
    发明授权
    Exercise rowing machine 失效
    锻炼划船机

    公开(公告)号:US4743011A

    公开(公告)日:1988-05-10

    申请号:US882785

    申请日:1986-07-07

    申请人: Calvin Coffey

    发明人: Calvin Coffey

    摘要: An exercise rowing machine uses a flywheel as a resistance member and has cam sector arms which are pivoted to rotate with the machine's oars. A bicycle-type chain is pulled to drive a sprocket drive on the flywheel when the oars are stroked. The arcuate shape of the cam sector arms provides a constant resistance force to the stroke of the oars over the oar sweep. The position of the foot stretcher plate is adjustable. A shroud for the flywheel has an adjustable throttle or shutter to control air flow and thus adjust the amount of resistance.

    摘要翻译: 运动划艇机使用飞轮作为阻力构件,并具有枢转以与机器的桨旋转的凸轮部分臂。 当桨被抚摸时,自行车链条被拉动以驱动飞轮上的链轮驱动器。 凸轮扇形臂的弓形形状在桨桨上提供了桨的行程的恒定阻力。 脚踏板的位置可调。 飞轮的护罩具有可调节的节气门或快门来控制气流,从而调节阻力。