| 摘要 |
1,044,355. Indexing. NATIONAL RESEARCH DEVELOPMENT CORPORATION. May 25, 1965 [May 27, 1964], No. 21983/64. Heading B3B. A vertical or horizontal indexing device comprises two relatively movable members 11. 12 having facing grooves 17, 18 containing balls 13, 14 which may be held in mesh by springs 24. To rotate the table 12, a lever 30 is operated to rotate an eccentric 28 and relieve the spring pressure. An intermediate member may be incorporated to provide a second pair of grooves containing a different number of balls to permit differential indexing. |
