US40994A - Improvement in turning-lathes - Google Patents

Description

UNITED STATES PATENT OrErcE.

IMPROVEMENT IN TU RNING-LATH ES.

Speciticat'on forming part of Letters Patent No. 0,994, dated December 2Q, 1863.

To aZZ whom it may concern:

Be it known that I, REUBEN J. COLE, of Poultney, in the county of Rutland and State of Vermont, have invented an improved turnin gvlathe, particularly adapted to turning and finishing articles of wood which require to be bored in the center, either partly or entirely through, and which I design especially to be used for turning, iinishing, and boring currycomb handles; and I do hereby declare that the following is a full and exact description thereof, reference bein ghad to the accompanying drawings, making part of this specification- Figure 1 being a plan of the lathe Fig. 2, a longitudinal vertical section thereof (together with the table or stand on which it rests) in the plane of the axes of its head and foot stocks; Fig. 3, a transverse vertical section of the same in a plane indicated by the line a: fr, Figs. l and 2.

Like letters designate corresponding parts in all of the figures.

I make a stock of cast-iron, the structure of which is as follows A base-plate, A, of suitable dimensions, has cast upon each end permanent head and foot stocks a a a a. Between the head and foot stocks, respectively, is a movable table, B, resting and also sliding upon two parallel anges or ways, ff, cast or otherwise affixed on the head and foot stocks. The table also is held in place by hooked flan ges b b, working under those on the head and foot stocks. This table is drawn forward to the work by a foot-lever, D, and chain or cord O, or their equivalent, and thrown back by a spring,-E, or its equivalent. To the table is attached and moving with it the knife or cuttin g-edge G, made to form the exact outline or shape ofthe article to be turned. In the head- Stock is fitted the revolving spindle H, and pulley h for the driving-belt. The spindle is bored to receive a center, g, which sustains and revolves the block or piece to be turned. This center I make of a peculiar structure. It is fitted to the spindle with the usual tapering shank, but the outer end is a tube, i, projecting beyond the spurs j j, which surround and are attached to it. The advantages sought, and which I fully obtain by this peculiar center, are important and of great value in saving material and labor. The projecting tube i serves two very important purposes: First,

when a handle or any article is to be bor( d through, the end of the bit will enter the projecting tube withoutl being exposed to injury, and will save the time and cost ofchanging to any other machine for boring quite through second, the projecting tube z' supports the end of the block without :revolving it, while adjusting the opposite end, before forcing the block forward to the spursjj, which put it in motion, and it thus enables me to get a perfeet center, with a great saving of stock and time. In the foot-stock is the deadspindle I, which does not revolve. This spindle also is of peculiar construction. Onits upper side are a number oftceth or cogs, m. Alever, L, havin gacircular end with corresponding teeth, ZZ, is arranged to work into the teeth on the spindle, by which it is thrown forward and back t-o suspend the block or article to be turned,and release it when completed. This spindle is bored quite throughthe ccnter,-and its under side is slotted through to the center bore, k, the slot n extending from the rear end of the spindle forward as far as required. Forward of this slot n is another slot, or forming a continuation of the same, also cutting through to the central bore of the spindle, and extending nearly or quite to the forward end of said spiudle,in the under side thereof. These slots or portion of one slot, as described, form, irst, an outlet for the escape oi chips when boring the handle or other article turned. Into the forward end of the spindle I is firmly fitted a tubular center, p, which moves forward and back with the spindle, and sustains the end of the block to be turned and bored, but does not revolve. Working within the central bore, 7c, of this spindle, and through it by separate power, (that is, by a power not necessary to any other operation of the lathe,) is a bit-stock, M, and bit N, formed for boring parallel with the grain of the wood, and placed with its concave side down to allow the chips to fall out through the said opening or slot n in the spindle and center before described, which may also be slotted in the under side, if desired. Second, attached to the under side of the bitstock M is a projection, r, which works through the said slot or portion of slot a in the under side of the spindle. To this projection or ear is fastened a chain or cord, R, that extends over two sheaves or pulleys, s t, at the two ends respectively, one end of which chain or spindle H, the saine pr jecting beyond and in cord is made fast to a foot lever, Q, and to the other end is suspended a Weight, T. By this arrangement I introduce power through theV slot n in the spindle I, and a forward and backward motion is givtn to thebit-stock and bit-forward by the foot of theattendant, and backward by the Weight T.

With this lathe, aS described, I am enabled to save a very large item of the expense ot' turning, finishing, and borinb)` curry-comb handles and other articles of wood which "require to be both turned and bored in the center.

What I claim as my invention, and desire. to secure by Letters l atc it, is-

l. The tubular centen' in the live or moving combination with the spurs jj, in a lathe designed to bore thror gh the article to bc turned.

2. The slotted sp nde I in the foot-stock of a lathe, (for turning curry-con1b handles or other articles of wood requiring to be. bored in the center,) through which power isintroduced to operate a bit-stock and bit Working in the center of the spindle, in combination with the bit stock and bit, substantially as described.

3. The employment of an opening or slot, n, in the under side of the spindle ot' the footstock, and in its tubular center, if necessary, for the discharge of chips, in combination with a bit-stock and bit working` within the hollow spindle, substantially as described.

The above specification ofniy improvements in turning-lathes signed by me this 22d day of September, F63.

REUBEN J. COLF.

Witnesses:

HENRY RUGGLEs, H. I. RUGGLES.

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