USRE10765E - merklen - Google Patents

Description

Y and 15.

the cutter-head.

shaft 11, while the gear-wheel h meshes by a pinion fixed theretowith a. gear-wheel, h of one of the lathespindles. By throwing the slotted standard h toward the screw-shaft until the gear-wheels intermesh and turning the hand-crank h motion is imparted from the screw-shait to the lathe-spindles and the blank to be carved, which is thereby slowly revolved, while it is at the same time acted upon by the revolving cutter-head 0. By applying diiferently-sizcd gear-wheels to the slotted standard h a quicker or slower motion is imparted to the blank, according to the pitch required. I

i In place of working the screw-sh aft by hand, itcan also be worked by power by means of pulleys and belt and a suitable belt-shifting device. j

The blank is adjusted axially in the lathecenters in the usual manner by locking the gear-wheel h? consecutively into difl'erent axial positions by'a spring-pin, h, which enters equi distant socket-holes of the gear-wheel.

The construction of the cutter-head G and v the shape of the cutting-knives are clearly shown in detail in Figs. 4, 5, 6, 8, 10,12, 14, The cutter-head C is screwed by its interiorly-threadedshank tightly upon the end of the cutter-shalt, and the cutting-knife clamped into position to one of the checks of The profile of the cutting knife is equal to the profile of one-half of the section of the pattern to be produced upon the work, so that by the rotations of the cutting-knife the full pattern is produced. The inner edge of the cutting-knife is exactly in line with the center of theeuttcr-head, which is faced by a detachable 'cap, 0', having the same profile as'the cutti rig-knife. is recessed in line with the inclined checks of the cutter-head to admit the setting of the knife so as to project somewhat beyond the The cap 0'? is placed accurately in position upon the cutter-head by means of a conremoved from its shaft.

centric shoulder, 'i, which fits into a concentric recess, i, of the cutter-head, as shown clearly in Fig. 5. The cap (3 is secured by an eccen-- trically-arranged screw-bolt, i, which passesv longitudinally through the cutter-head, and which can be removed after unscrewing, so as to release the face-cap after the cutterfhcad is The cap 0- The cutter-head '0' can be employed for cut ting a right or left hand spiral, according as the cuttingknife is secured to one check or p the other of the cutter-head.

\Vhen-thc revolving cutter-head is applied to the work, itproduc'es, by the inclined posi- 4 tion of the knife to the work, the simulaneous traversing motion of the cutter-shaft, and the slow turning motion ofthe blank, a spiral ornamental profile upon the baluster, or other article to be carved. is thus carved upon the baluste the carving attachment is returned to its'fstarling position, the baluster turned on its axis for the required distance, and a second spiral cut in the same manner, and so on. until the spiral ornamentation of the baluster or other article is (OIIlpleted.

Iii-this manner simple or compound profiles, channels, flutings, &c., may be carved spirally upon the article to be ornamented, also pearls, as shown in Figs-14, 15, and 16, whichlatter may be arranged in' circular or. spiral lines, as'desired.

The carving attachment liicilitatcs, the production of spiral ornamentation, as it is accomplished by power and dispenses with the tedious and expensive carving of this class of ornamentation by hand.

Having thus described myinveniimi, I claim as new and desire to secure by Letters Patcnt- In a lathe, the combination of a longitudinally-traversing carriage divided horizontally,

the upper part being adjustable transversely of the lathe on ways .of the lower part by means of a screw, a longitudinal screw-shatt for opcrating the carriage, a cutter-shaft mounted on said carriage at right angles to and in onevv plane with the axis of the work, a rotary cutter-head attached to the cutter-shaft, and mech anism for rotating thework simultaneously with the movement of the carriage and cut When one entire spiral 'ter-head, substantially as shown and described.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

VAlJEliTIN MERKLEN;

W'itnesses:

ALAN I). KENYON, OSCAR F. GUNZ.

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