File:AmCyc Boring - Ingersoll Drill.jpg

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Description
English: Woodcut/drawing of an Ingersoll rock drill. It is especially effective in excavating open cuts. c is the cylinder, s the steam or compressed air chest, h the pipe which supplies the compressed air, and p the screw for moving the drill forward, which may be done by the hand or by the rod g, which is turned by an automatic ratchet movement.
Date published 1879
Source The American Cyclopædia, v. 3, 1879, p. 100 (Fig. 19).
Author Unknown authorUnknown author
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Date/TimeThumbnailDimensionsUserComment
current18:23, 25 March 2014Thumbnail for version as of 18:23, 25 March 2014481 × 958 (136 KB)Library Guy{{Information |Description ={{en|1=Woodcut/drawing of an Ingersoll rock drill. It is especially effective in excavating open cuts.}} |Source =''The American Cyclopædia'', v. 3, 1879, p. 100 (Fig. 19). |Author =unknown artist |Date...

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