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    • 6. 发明专利
    • Improvements in or relating to spindle bearings
    • GB553390A
    • 1943-05-19
    • GB225542
    • 1942-02-20
    • RICHARD MICHELJULIAN GABRIEL TOMAS MICHEL
    • F16C17/08
    • 553,390. Bearings. MICHEL, R., and MICHEL J. G. T. Feb. 20, 1942, No. 2255. [Class 12 (i)] A cone, cup, or journal bearing of glass, plastic material or a jewel is made by inserting the bearing material in an unfashioned mounting and then shaping the bearing and the mounting with the same machine setting. The mounting may be shrunk on to the bearing or the bearing material heated and pressed into the mounting. In the latter case, a metal rod 3 with a central hole 2 is formed with a mouth 4 and undercut recess 5 and heated, a glass rod being pressed into the mouth until it softens and fills the recess. On cooling, the front is ground down for a distance l, the rod 3 is turned to its full diameter d and the exterior shaped such as by screw threads 11 and the bearing surface 12 is then fashioned. A hole 13 is then drilled from the rear, an end stone 14 and bush 15 inserted and the mounting is then parted off to its final length l 3 . The thermal coefficients of the mounting and bearing should be such that on cooling the bearing is firmly gripped without cracking.