Rock Drill.
Description:
Patent for a new and improved rock-drill. This design "is to construct a simple and efficient rock-drill in which the forward feeding and rotating of the drill are accomplished automatically" (lines 15-18). It consists in "the drill-rod, a tappet-plate placed loosely on the drill-rod, clutch mechanism connected with the tappet-plate for engaging the drill-rod, a spring for impelling the drill-rod, a cam provided with conical ends for lifting the tappet-plate, and the guide" (lines 20-26).
Date:
July 26, 1892
Creator:
Belt, Perley P.
Item Type:
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Patent