US1075246A - Lathe. - Google Patents

Description

J. FEIGE.

v LATHE.

APPLICATION FILED MAY 23, 1912.

Patented Oct. 7, 1913.

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A TE 6 INVENTOK JOSEF' FEIGE ATTORNEY J. FEIGE.

LATHE.

APPLICATION FILED MAY 23, 1912.

1,075,246. Patented 0011731913.

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E L J F'GLS- \NVENTOK JosEF FElG-E ATTORNEY COLUMBI A PLANDGRAPH c0.. WASHiNa'roN, D. c.

JOSEF FEIGE, OF LUDWIGSDORF, GERMANY.

LATHE.

Application filed. May 23, 1912.

To all whom it may concern Be it known that I, Josnr FEIGE, a subject of the German Emperor, and resident of Ludwigsdorf, Neurode district, Germany, have invented certain new and useful Improvements in Lathes, of which the following is a specification.

The subject matter of the invention is a dividing device capable of attachment to any lathe, by means of which the periphcry of circular workpieces can be divided into as many equal parts as desired and worked step by step at the dividing points without special aids such as ratchets, counter-shafts and the like. This is accomplished by fastening to a worm-shaft mounted on the head stock and capable of swinging about its foot a worm wheel which, for the purpose of step by step rotation of the lathe shaft, can be engaged in the toothed rim of the cone pulley and se cured in its engaged position, while to regulate the steps of rotation a disk provided with circular graduation is attached to the movable mounting of the worm crank shaft, above which disk extends an indicator fastened to the worm-shaft, so that the workpiece fastened to the lathe shaft can, at each step divided ofi' be worked with a cutting device to be clamped to the tool-carrier, without the necessity of marking the dividing points of the work-piece. The graduated disk is provided with a graduation as fine as desired and is arranged horizontally. Moreover, an auxiliary indicator, is provided adjustable in advance of and opposite the main indicator connected with the worm shaft, whereby it is made possible to carry out quickly and safely with the same graduated disk the most diverse intermediate divisions as fine as may be desired, without the fear of error.

One form of construction of the invention is shown in the drawing.

Figure l is a front view. Fig. 2 is a plan view. Fig. 3 is a side view. Fig. 4 shows an auxiliary disk and Fig. 5 the tables above the auxiliary disks necessary to the various divisions.

On the head stock 5 of the lathe is fastened a fast head stock 0, in which a pedestal h is displaceably arranged, which is secured Specification of Letters Patent.

Patented Oct. '7, 1913.

Serial No. 699,195.

in the disengaged end position by a spring pressed snap bolt resting on a flat spring m. In the pedestal is mounted a vertical shaft a which rests below upon a point cl, so that it can follow the movements of the upper pedestal h. The shaft carries a worm wheel 6 which can be brought into engagement with the toothed rim c" of the cone pulley or a gear provided in place of the latter and is secured in this position by a spring 70 acting upon the shaft a. The tension of the spring can be regulated by a screw Z.

Upon the upper portion h of the shaft pedestal h is fastened a disk 9, which is provided with circular graduation, for in stance from 0-96 and subordinate divisions between the main dividing points. The shaft a passes through the disk and carries, above the same, a horizontal handle f, which is continued in its opposite part into an indicator f which upon rotation of the handle runs over the circular disk g. The handle is held in its position by a screw 9.

Adjustable upon the shaft a and under neath the handle is attached an auxiliary indicator 0 by means of a set screw 8, which auxiliary indicator can be set in advance of the main indicator and in carrying out uneven divisions shows the point at which the main indicator must come to a stop at the end of each divisional step. On the handle f is attached another auxiliary indicator 29 which is diametrically opposite the main indicator f and indicates at the end of each divisional step the stopping place of the main indicator upon half rotations of the handle. Beneath the auxiliary indicator 0 a screw nut r rests upon the shaft a, which when auxiliary disks are employed serves to fasten same upon the main graduated disk.

If the worm wheel 6 is brought into engagement with the toothed rim 2" of the cone pulley i, then by rotation of the handle with the aid of the indicator f which runs over the disk graduation, and in certain cases with the aid also of the two auxiliary indicators 0 and 20, the cone pulley can be moved forward step by step for any desired number of tooth lengths and the periphery of the work piece fastened to the lathe shaft can be divided into a definite number of equal parts. If, for instance, the toothed rim of the cone pulley has 96 teeth and the disk 9 a division of 96 lines, the rotations of the handle necessary for each divisional step of a work piece into, say, 2, 3, 4:, 6, 8, 12, 16, 24, 32, 48, 96 parts, is established by dividing the desired number of divisions into the number 96. Hence if it is desired to divide the work piece in 12 parts, for instance, the handle must be rotated 8 times for each divisional step, with 24 parts four times, etc. But if a division is required the number of which does not go into 96, in addition to a certain number of complete revolutions of the handle, a fraction of a rotation is also necessary. In order to determine this easily upon the disk 9 during the process of dividing, the auxiliary indicator 0 is placed in advance of the main indicator f by the space of the necessary partial rotation. Then after each division carried out, it indicates on the disk 9 the final position which the main indicator must occupy in the following division. Thus, for instance, the division of a work piece into 60 parts requires 1% rotations of the main indicator for each divisional step. In this case the auxiliary indicator 0, after the loosening of its set screw 8, is placed at the graduation mark which is distant from the indicator f and then for the first divisional step the handle is given one complete rotation, the graduation mark is noted on which the auxiliary indicator 0 now stands, and the main indicator f is rotated to the position vacated by the auxiliary indicator 0, whereby the first 1/60 divisional step is completed. The further steps follow in the same manner. The adjustment of the auxiliary indicator 0 is not necessary for rotations, since the auxiliary indicator p, diametrically opposite to the main indicator f automatically indicates the semi-rotations.

In order not to be obliged, when carrying out uneven divisions, to compute the proportion of division each time in advance, whereby mistakes and errors arise, it is expedient to use auxiliary graduated disks t (Fig. i) of paper or cardboard which are provided with the desired uneven division and must be attached to the main graduated disk before work is commenced. For this purpose the screw 9, the handle f and the auxiliary indicator 0 as well as the screw nut r are removed from the shaft a, the auxiliary disk is placed upon the graduated disk 9 and is fastened by raising the screw nut r to the main disk g. Then the auxiliary indicator 0 and the handle f are re-attached to the shaft a and the connection is secured by the screw nut q. The auxiliary disk shown in Fig. t is divided into 59 parts. Since the cone pulley 2" has 96 teeth, to carry out one divisional step the handle I) must take 96/59 or 1 and 37/59 rotations, This number is noted on the disk, so that without previous computation the auxiliary indicator 0 can be immediately placed upon the graduation line 37 of the auxiliary disk and it then states the positions which the main indicator must occupy as a final position in carrying out one divisional step. Provided the graduation of the auxiliary disk shows no primary'figures, intermediate divisions also can naturally be carried out with the auxiliary disks. Thus, for instance, with the auxiliary disk divided into 11 parts the divisions 22, 33, 14 and 66 can also be carried out. In order to be able to determine immediately the auxiliary disk necessary for a certain division, the auxiliary disks are provided with serial numbers which are noted in a table (Fig. 5) together with the number of divisions. In this table column I gives the number of divisions and column II the disk number belonging to it. Thus, for instance, for carrying out the division 7 the auxiliary disk 3 is necessary, for carrying out the division 59 the auxiliary disk 22.

By the spring 70 acting upon the shaft (1 the worm wheel a is secured in its position of engagement with the toothin i of the cone pulley i, so that the work plece stands immovable at each divisional step and can be at once out without the use of special locking devices, while the locking of the worm wheel in the position of rest is effected by the locking bolt 92 engaging the displaceable pedestal h.

I claim:

1. In a lathe, the combination, with the head stock, of a pedestal swingingly mounted at its foot on the head stock; a vertical worm shaft in said pedestal, a worm mounted on said shaft; a worm wheel fixed on the head stock shaft and engaged by said worm for rotating the head stock shaft step-bystep; a horizontally disposed graduated disk mounted on the upper end of the pedestal; a main indicator attached to the worm shaft and having its end disposed over the graduations of the main disk; means for rotating the worm shaft; a limiting indicator capable of being adjusted in advance of the main indicator and to limit the movement thereof; and means for rigidly securing the limiting indicator to the main indicator so that they move together.

2. In a lathe, the combination, with the head stock, of a pedestal swingingly mounted at its foot on the head stock; a vertical worm shaft in said pedestal; a worm mounted on the said shaft; a worm wheel fixed on the head stock shaft and engaged by said worm for rotating the head stock shaft stepby-step; a main horizontally disposed graduated disk mounted on the upper end of the pedestal; a main indicator attached to the worm shaft and having its end disposed over the graduations of the main disk; means In testimony whereof I have hereunto set for rotating the Worm shaft; an auxiliary my hand in the presence of two subscrlblng indicator arranged diametrically opposite to the main indicator a limiting indicator Witnesses. capable of being adjusted in advance of the J OSEF FEIGE. main indicator, and means for rigidly se- Witnesses:

ALFRED GABEL,

curing the limiting indicator to the main FRANK Gr. Por'rs.

indicator so that they move together.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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