US61166A - black - Google Patents

Description

T. J. OURRIER & ,A. M BLACK.

TOOL BEST FOR LATHES.

Patented Jan. 15, 1867.

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To ALL WHOM IT MAY concnan;

T. J. CURRIER 7 AN D A. M. BLACK, OF WORCESTER, MASSACHUSETTS Letters Patent No. 61,166, dated January 15, 1867.

IMPROVEMENT 1N TOOL-RESI'S FOR LATHES.

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Be .it known that we, T. J. GURRIER and A. M. BLACK, both of the city and county of Worcester, and

Commonwealth of Massachusetts, have invented certain new and useful improvements in Tool-Rests for Engine Lathes and other purposes; and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, in which- Figure 1 represents a perspective view of ourinvention.

Figure 2 represents a cross-section on line A Rig. 1; and

Figure 3 represents a longitudinal central section on line C and D, fig. l.

Tc'enable those skilled in the art to make and use our invention, we will proceed to describe it.

In the drawings, A represents what is generally termed the poppet-block, which fits and works upon the slide-rest of the lathe in the ordinary manner. B represents the tool-post; the tool; D the tool-rest, and E the set-sc'rew'by which the tool is held in place. The usual mode of elevating or lowering the point a of the tool C is to loosen-the screw E and place something under either the front or rear end of the tool-the rest part D not being made adjustable for that purpose in machines heretofore made. There is a great objection to this mode of adjusting the tool, since in the operation the tool is very liable to slip either forward, back, or laterally. We obviate all these objections by making the part D, upon which thetool O rests, in circular and dove-tailed form to fit a'groove of corresponding'shape in the part A, aszfully shown in the drawings. Upbn the outer surface of the dove-tailed part F of the part I) is cut a section of a screw-thread, 6, into which the screw G works, the latter being placed upon the end of a spindle or shaft, H, which is arranged to operate as fully shown in the drawings. The screw G 'is-fi rst slipped up into the slot 1: in the part D, when the shaft or spindle H is run in through the screw, the latter having a groove, d, to receive the spline or stay-pin 'on shaft G. J is ahandle or crank by which shaft H is turned. By turning shaft H screw G will cause the part D to move toelevate or depress the point of cutter C, depending upon the direction in which the shaft is moved. In fig. 3 the point of the cutter is shown in red lines turned up to illustrate the operation of our invention. To keep the part D from having any lateral play a metal packing, f, is placed in one of the dove-tailed grooves and forced against the part F by screws, 9 g g.' 'The end of shaft H maybe made to receive a pipe-wrench if the crank-or handle J is found objectionable. It will be seen that by our invention the point of. the tool can be adjusted up or down with great precision, while screw G will always hold it in position, when once adjusted, until the position of the parts is changed again by the movement of the shaft H. The invention is applicable to any machine where there is a necessity for elevating or lowering the point of the tool-creaser, polisher, or other similar devices.

Having described our invention, what we claim therein as new, and desire to secure by LettersPatent, is- The combination with the poppet-block A. of the tool-rest D, shaft H, and screw G, substantially as set forth.

T. J. CURRIER, A. M. BLACK.

Witnesses:

Tnos. H. Dunes, DJL. MILLEn.

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