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. |
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| Date | published 1879 | ||||||
| Source | The American Cyclopædia, v. 3, 1879, p. 100 (Fig. 19). | ||||||
| Author | Unknown author | ||||||
| Permission (Reusing this file) |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:23, 25 March 2014 | | 481 × 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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