| 摘要 |
572,254. Making cages for roller bearings. HOFFMANN MANUFACTURING CO., Ltd., and BROWN, A. K. Jan. 27, 1944, No. 1559. [Classes 83 (ii) and 83 (iv)] Forging-machines.-Cages, for roller bearings, of the type in which a pair of rings b are connected by spacers, have their bars, formed originally with straight sides as at a, shaped to concave roller-retaining form at a<1> by pressure applied simultaneously on opposite sides by dies d<2> that may be operated by twin cams or toggles, but as shown are mounted on levers e pivoted at f. |
