| 摘要 |
1,079,755. Tapping device. SVENSKA PRECISIONSVERKTYG A.B. Aug. 21, 1964 [Aug. 22, 1963], No. 7279/67. Divided out of 1,079,754. Heading B3N. The description is identical to that of the parent Specification but the claims are directed to a screw-thread cutting apparatus having a slipping clutch drive formed by an input 112, Fig. 1, which drives a ring 132 through a ball 128, the ring having face cams which cooperate with similar cams 134 on a second ring 124 which drives a part 16 through a ball 120, rings 132, 124 being interconnected by a coupling 18. |
