File:History of Inventions USNM 18 Drill.png
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English: No. 1. Cores of flakable stone, pointed for drilling. The grip may be finished
with pitch or wrapping 23,659, 18,302 No. 2. Chipped drills with slender bits and flattened or crutch-shape grip. This flattened portion could be inserted in a " saw cut " at the end of a handle 32,526, 13,721, 173,790, 19.500 No. 3. Drill bits of stone and metal, the last named driven into the end of a piece of antler with crutch-shape grip 181,655, 89,973 No. 4. Drill bits of copper ; useful in boring soft material without sand and hard material with sand. Method of hafting not knowTi 147,334, 147,345, 147,309(2) No. 5. Spindle drill. Bit of iron or stone. The shaft is held between the palms of the hands and driven by reciprocating motion or worked on the naked thigh with one hand 128,751 No. 6. Strap drill, consisting of spindle and bit, mouthpiece and socket, and driving strap of rawhide, wrapped once about the spindle and driven by the two hands holding of grips of bear's teeth at the ends 33,654 No. 7. Bow drill. Spindle of wood, bit of iron, bow from seal's rib, mouthpiece of wood with stone socket. Reciprocating circular motion is produced by the backward and forward motion of the bowstring 177,734 No. 8. Pump drill. (Model.) Its parts are spindle and stone bit, spindle whorl, horizontal grip pierced by the spindle, and string of buckskin for driv- ing. Reciprocating motion is given by the vertical movement of the grip 134,168 No. 9. Finland auger, consisting of bit inserted in the end of the stock ; handle fitted in a mortise through the stock ; socket of wood to fit against the breast, bolted to the upper end of stock 167,785 No. 10. Drill bits made from hardened steel, for boring steel and iron. No. 11. Steel bits for boring in wood and similar materials. In China and Japan such bits were worked in straight handles. No. 12. Steel center bit with gauge to regulate the size of the hole. No. 13. Common brace and center bit for boring. These braces have fixed connective joints, and bits all have the same size butt. No. 14. Brace with adjustable connective to fit the top of the bit. No. 15. Mechanical drill. Spindle a screw with long thread, pivoted in a fixed handle above, moved by a nut of wood forced up and down the spindle. |
| Date | |
| Source | Walter Hough (1922). Synoptic series of objects in the United States National Museum illustrating the history of inventions. Proceedings of the United States National Museum 60 (2404). 1-47, 56 pl. |
| Author | United States National Museum (Smithsonian Institution), Washington D.C. |
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