Pneumatic Rock Drill

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It consists of a steam cylinder and piston and its rod, and to the rod is firmly secured a steel rock-drill. The cylinder is supported upon a heavy tripod that may stand in any position and present the point of the drill in any direction. The steam or compressed air is conveyed to the cylinder through a hose, and when ready for work it delivers its tremendous thundering blows upon the rock in rapid succession.


Charles Barnard Tools and Machines (New York, NY: Silver, Burdett and Company, 1903)


TIFF (full resolution)

1619×2400, 1.4 MiB

Large GIF

690×1024, 146.9 KiB

Medium GIF

431×640, 72.6 KiB

Small GIF

215×320, 24.6 KiB