The great number of mechanical tools which have, and are, daily taking the place of the rude hand tools used by our ancestors, is a demonstration of the progress of the age ; and nlthough many are but mechanical con- trivances attached to the old took, and still intended to be operated by hand, yet they have gained much in convenience, aceuracy, and speed. One of these is the tool we are about to describe, invented by Jonas Bosen- bury, of Cherryville, N. J., and patented by him April 11, 1857. Fig. 1 is a perspective view of the tool, set so as to bore a hole perpendicularly. A is the stuff to be bared, grasped by clamps, C, and the movable rack operated by the wheel shown in the foreground. D are two fractional screws, which move the boring frame to any position on the stuff, and E is ths frame, having ways, F, running at right angles to it. On these ways fits the piece, G, provided with a quadrant, H, in which the tool is held at any angle by the set screw, b. This piece, G, can be secured to any position on the ways, F, by set screw, ;, I I are two uprights, having cross pieces, J J, provided with journals, in which the auger-holder, P, rotates, carrying the auger, Q. These journal pieces, J, can slide up and down I, and can be pressed down to keep the auger in the stuff, by tho lever, M, and link, L ; and when not required, or not in use, the tool is kept up by the spring catch, K. N is the handle which rotates the bevel wheel, 0, and so gives motion to the auger. The advantages of this machine are, that it can bore at any anglo, it can be easily and accurately adjusted to any position on the stuff, and by means of the lever, E, great power can be given the tool. Fig. 2 is a front view, with the handle or crank removed. The inventor will furnish any further particulars, if addressed as above.
This article was originally published with the title "Bosenbury's Boring Machine" in Scientific American 13, 28, 220 (March 1858)