Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 341
1358. PORTABLE DRILL, rope trans,mission and flexible shaft. One continuousrope over driving pulley, two double sheavesanchored, and flexible shaft pulley; allow-ing the driving sheave of the flexible shaftto be anchored in any position, and fortightening the driving rope. 1359. MULTIPLE DRILLING… … 1360. MULTIPLE DRIL-LING MACHINE.—For drill-ing a number of holes in flangesat one time. The drill chucksare adjusted in a spider for anysize circle and connected to thedriving head with jointed rods.
Mechanical movements
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