the ture of the invention consists in a certainarrange- opened, allow the bar to fall. The next half formed step, m, descends from the central hand, which, moving in an arc, throws the ment and mode of operating two sets of revolution of the cranks will cause the wrist of STONE DRILLING MACHINE.… … ard, R, which is secured to the base, B} behind the head, L, of the gripper rod, M, consequent, taching the harness to the straps, and greater point in the slot, and allows the crank-wrist the drill bar. ly the rod is not moving. Both sets of grippers protection to the heddles, his claim has an im-…
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