| 摘要 |
1,071,648. Machine tool details; indexing. STANDARD TELEPHONES & CABLES Ltd. Nov. 5, 1965 [Nov. 6, 1964], No. 45300/64. Headings B3B and B3C. [Also in Division H2] A work-table is positioned, rotationally or linearly, by a piezo-electric stepper motor (see Division H2), in which the active motion as well as the locking action between steps, are both performed by piezo-electric elements energized in a suitable sequence. |
