| 摘要 |
630,410. Chucks. CHURCHILL & CO., Ltd., C., and MOULD, C. H. Oct. 24, 1947, No. 28473. [Class 83 (iii)] A collet-operating device comprises a plurality of pairs of reaction rollers 8 having their axes extending substantially radially from the collet axis, the rollers 8 being disposed in cages 16 between fixed and movable elements 9, 11 respectively, and each pair of rollers being contacted by a pressure roller 7 which is actuated by a cam 5, associated with a sliding sleeve 3, to force the rollers 8 further apart and cause axial movement of the element 11 with consequent movement of the collet tube 13. The cams 5 are operated in the reverse direction to release the grip by means of pins associated with the sliding sleeve 3. Specification 614,905 is referred to. |
