US36942A - Makersj lathes - Google Patents

Description

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OF OTTAVA, ILLINOIS.

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T0 f//ZZ schont may concern:

Beit known that l, FDWAnD J. CHPIN, of Ottawa. in the county of La Salle and State ol" lllinois,haveinveuted a new and Improved Lathe for Yil'atnh-Maltersl Use; and Ido hereby declare that the following is a t'ull, clear, and exact descriijition et' the saine, reference being` had to the accompanying drawings, niaking a part ot' this spccilication, in which- Figures l, 2, 3. i, and 5 are elevations ot' 1ny invention, the latter being a sectional elevation taken in the line .c a. Fig. G isa plan or top view ot' the same. Figs. 7 and S are detached sectional views of parts pertaining to the saine, Fig. 7 heilig taken in the line y y, Fig. l, and Fig. 8 in the liue e z, Fig. 6; Fig. 9, a detached perspective view ot' a part pertaining to the saine.

Similar letters of reference indicate corresponding parts in the several figures.

The object ot' this invention is to combine a number ot' parts in such a manner that all the different lathes used by watch-makers may be obtained and used with a single bed-piece and with but one driving mechanism, the device, as a whole, being at the saine time eX- tremely simpleand capable of being adjusted and operated with equally as great facility as the ordinary lathes in use. Y

To enable those skilled in the art to fully understand and construct myinvention, I will proceed to describe it.

A represents a bench or table on which the lathe is placed, I3 the wheel by which the mandrel oi" the lathe is driven or rotated, and C the treadle,which is connected by a rod, D, with a crank, E, at one end of the shaft ot' wheel B.

Fis a spring, one end of which is connected to the crank E and the opposite end to the underside o l'the bench A. rlhis spring serves to equalize the rotation of wheel B and assist the crank Il in passing its centers.

In the top ot' the bench or table A there is made a hole or opening l'or the band ot' wheel I3 to pass through, and on the top ofthe bench or table there is permanently secured an annular way,\},' which is of metal and has tit-ted upon it a bell-shaped metal base, H, as shown clearly in 7. rlhis base II serves as a support i'or the bedpiece I of the lathe, the latter being attached permanently to the for- Clhe base is secured on its Way G by means ol' a hook, (I, which is Iitted on a screw, K, within the base H, and extends down through the top ofthe bench or table, and has a pin, L, passing horizontally through it. This inode ot' securing the base II to its way G admits ot' the former being turned on the latter. rlhe screw Ii may be turned a greater or less distance up within the base H,to insure a snug adjustment ofthe base on the way.

rEhe bed-piece I of the lathe is ot rectangular torni in its transverse sectioinainl is curved upward at its back end,and has a screw, a., passing horizontally through it, a janrnut, b, being on the screw, the latter receiving the back center ot' the mandrel J. The bed-piece I also has a vertical bar, c, attached to or cast with it,in the upper part of which is the front bearing ofthe mandrel. (See Figs. 2, 3, and 4.)

\Vhen the invention is used as an ordinary turning-lathe, a rest, Ii, is placed on the bedpiece Land also a head,L, as shown in Fig. 3, the band of wheel B passing through the hole or openingin the top ot' the bench or table and around a pulley, d, on the mandrel J.

Vhen the invention is used t'or t'acing off work. the rest K and head L are removed from the bed-piece I, a chuck, M, secured to the mandrel J, and a sliderest, N, titted on the bedpiece, as shown in Fig. 2.

When the invention is used as a Swiss lathe,77 as they are commonlyl termed, the head L is removed and the rest K placed on the bed'piece, asshown in Fig. 4.

O is a mandrel, which is provided with a dividing-plate or counter-wheel, I), (see Figs.

l, 5, and 6,) and also provided withv a chuckplate, Q, to which wheels are connected for cutting gear thereon; and It is a slide which is fitted on the bed-piece I when the mandrel O is used.

On the upper surface ofthe slide R there is secured a dovetail guide, e, which, when the slide It is adjusted on the bed-piece I, is parallel with the latter. On this guide@ there is titted a plate, j', which is allowed to slide freely back and. forth, and has a frame, S, attached to it by center points, g g, so that it may work or swing freely up and down,the extent ofthe downward movement being determined or regulated by a set-screw, 7L. In this frame S there is fitted a mandrel, T, on which a burrcutter, U,is placed, and also a pulleya'. rlhese latter described parts-to wit, those connected with the frame S-form a gear-cutting device, and in usingit the bed-piece I is turned around one-quarter of a revolution, so as to be in a vertical plane which is parallel with theplane of the Wheel B and at right angles to its former position. rlhe band of the wheel B is also fitted over the pulley t' ofthe mandrel O. and the latter, and consequently the Glitter U, rotated thereby. The gears are eut by moving forward the frame S, the cutter acting on the lower part of the wheel and the depth of the eut regulated by the set-screw h. After each cut the gear-Wheel is turned a properhdistance to receive the succeeding cut, the extent ofthe movement being determined by the dividing plate or counter-wheel I? and a pointer stop, j, attached to the bar c of the be l-piece. By this arrangementgears may be eXpedienlly cut.

The device, as a whole, is extremely simple and ei'eient, and may be adapted to all the different lathe-Work required to be done by a Watch-maker or repairer.

I do not claim the rest K nor the head L, nor the slide-rest N nor chuck M, for these are old and Well-known devices; but

I do claim as new, and desire to secure by Letters Patentl. The inode ofattaching the bed-piece I to the table or bench A,as shown and described to wit, by means of the bell-shaped base H, fitted on the annular Way G,and secured thereto by the screw K, hook J, a-nd pin L, all arranged, as shown, to admit of the turning or adjusting of the bed-piece I on the table or bench.

2. The gear'cutting frame S, provided with the mandrel T, cutter U, and set-screw h, and connected to the sliding plate f by center points,g g,to admit of the rising and falling of said frame and its proper adjustment relatively with the wheel to be cut, as set forth.

3. The combination of the mandrels J O with the bed-piece I, restsK N, chuck M, and gear-cutting frame S,all arranged as described, to form a new' and useful lathe, for the purpose herein specified.

EDWARD J. CHAPIN.

Witnesses:

Trios. ORTON, F. B. HoY'r.

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