US322212A

US322212A - Lathe for turning cross-head pins

Info

Publication number: US322212A
Authority: US
Publication date: 1885-07-14
Anticipated expiration: 1902-07-14

Description

(No Model.) I 2 Sheets-Sheet 1.

2 N. THOMAS. LATHE FOR TURNING CROSS HEAD PINS. v 7 No. 322,212. Pate n tedJuly 14, 1885.

W'Z'Znesses:

java @72 (No Model.) 2 Shets-Sheet 2,

N.- THOMAS.

LATHE FOR TURNING GROSS HEAD PINS. No. 322,212. Patented July 14, 1885..

f M n 2 k ix /9 [0 ML w mm- In 2 6722 0]? Y 97/3/7144,

upon legs or standards/2, carries at its oppo- NITED STATES NICHOLAS THOMAS, 0

ATENT OFFICE.

F CHICAGO, ILLINOIS.

LATHE FOR TURNING CROSS-HEAD PINS.

fiPECIPICATION forming part of Letters Patent No. 322,212, dated July 14,1885.

, Application filed May To aZZ whom it may concern.-

Be it known that I, NICHOLAS THOMAS, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Lathes for Turning Cross- Head Pins, 8rd, of which improvements the following is a specification. I

The object of my invention is to provide effective and esirable means which may be rgadily appl-iedaolathesoiltjggprdinary cons'truc" ion for turning the pins ofbross-heads or other articles, which, by reason of their/relation to other parts of the structure with which they are connected, cannot be turned in lathes in the operation of which the spindle and the work carried thereby are continuously rotated.

To this end my improvements consistin certain novel devices and combinations, hereinafter fully set forth.

In the accompanying drawings, Figure 1 is a View in perspective of a lathe embodying my invention; Fig. 2, a side view in elevation of the same; Fig. 3, a plali or top View; Fig. 4, an end view as seen from the left; and Fig. 5, an end view as seen from-the right, with the tail-stock removed and the piece of work operated on shown in vertical section.

My improvements are herein illustrated as applied in a back-geared lathe which is otherwise of the present standard construction. The lathe bed or shears 1, which is supported site ends a head-stock, 3, and a tail-stock, 4E. The live-spindle 5 is mounted in bearings in the head-stockS/and a cone or stepped pu-lley, 6, to which isisecured a pinion, 7 is fitted to rotate freely upon said spindle; The pinion 7 meshes with a gear, 8, fixed upon the back gear-shaft,9, which carries a pinion, 10, said pinion being adapted either to mesh with a gear, 11, fixed upon the spindle 5, when it is desired to rotate said spindle continuously to operate the lathe in the ordinary manner, or to engage another gear, 12, and through the same and its connections to impart an oscillatory or partially rotativ e ypyenient to the spindle for the perfdifinanee of the class of work for which myimprovements are designed,

22, 1885. (No model.)

pinion ld is fitted to slide longitudinally upon face-plate 16 of the lathe, and a diametric slot,

17, is formedin the disk 15toreceive1a crankpin, I g which may be adjusted and fixed in positlon in said slot at such distance from the center of the shaft 13 as may be necessary to impart the degree of oscillatorymovement to the live spindle 5 which is'required by the character of the wdrk to be performed. A connecting-rod, 19, is coupled to the crank-pin 1 8 and to a wiist-pin 2Q, upon a segmental gear, 21, pivoted by a p'iiibr stud, 22, to the head-stock 3. The gear 21 meshes with apinion, 23, secured upon the spindle 5, and,when vibrated or oscillated by the connecting-rod 19 about the center of its pivot 22, imparts a corresponding vibratory or oscillatory movement to the spindle 5 and the Work carried upon the face-plate 16 thereof, the degree of such movement being regulated by the adj ustment of the crank-pin 18 in the slot 17 0f the disk 15.

It will be obvious that in lieu of employing asegmental gear, as described and shownin Figs. 2 to 5, a circular gear adapted to oscillate about its center, as shown in Fig. 1, maybe used with similar effect; but I deem the construction first referred to more convenient and desirablef The saddle or carriage 24 is fitted to slide longitudinally upon the bed 1 in the usual manner, and is moved by a feedscrew, 25, actuated intermittently by a ratchet attachment similar to that of a planing-machine, the feed-screw carrying a ratchet-pinion, 26, which is engaged by pawls 27, which are swung about a center by a connecting-rod, 28, coupled to a crank-disk, 29, on the spindle 5. The ordinary lathe feed gear may be readily substituted when a continuous feed is desired for performing the usual work of a p lathe.

The cross-head 30, or other piece of work to as presently to be described. To this end the be operated on, may be chucked on the faceplate or supported between the live and dead centers 31 32 in the ordinary manner, andtwo tools or cutters, 33, are by preference employed, said tools being secured in tool-posts 34', each of which is fixed in a slide-block, 35, hung to the saddle, as in a planer, so that the tool may lift from its work when the traverse of the work is reversed. Each of the slideblocks 35 is operated by an independent cross feed-screw, 36, having either a right or left hand thread, and carrying a pinion, 37, one or both of said pinions,being fitted to slide longitudinally upon its feed-screw, so that the tools may be set independently one of the other. After setting the tools,the pinions are slipped into gear with each other, and the two tools will then be caused to simultaneously advance to or recede from the center line of the spindle. It will be seen that this construction is advantageously applicable in facilitating the employment of two tools in any class of work on an ordinary lathe.

In the operation of the lathe in turning up a cross-head pin, the crank-pin 18 being adjusted to effect the desired amountof traverse, and the piece of work to be operated on being chucked on the face-plate or secured between the centers 31 a fiat spot is formed on the cross-head pin other member to be turned for the commencement of the cut of one of the tools, which is set, and a half-revolution of the spindle made. 'lhbthbftbol'fi thenset exactly simil'anto the first, and the pinions 37 placed in gear, upon which the tools will be simultaneously operated, and will out alternately, each turning one-half of the circumference of the pin as the same is vibrated about its center by the connecting-rod 19, so that no time is lost and the cuts of the t wo tools join to make a true circle.

WVhen it is desired to use the lathe in the ordinary manner, the segmental gear is disconnected, the pinion 10 moved into engagement with the gear 11, and the usual lathe-feed substituted for that shown, the two posts being retained, or a single tool-holder employed, as may be desired. 1

While the employment of the intermediate gears, 21 23, for transmitting movement t'o the spindle from the connecting-rod may in most cases be found desirable, the same is not essential, and said gears can under my invention be dispensed with, and the connectingrod be coupled directly to the face-plate or spindle.

I claim as my invention and desire to secure by Letters Patent- 1. The combination of a lathespindle, a crank-shaft fitted to rotate in bearings in the head-stock or supporting-head of said spindle, and an intermediate connection whereby vibratory movement is imparted to the spindle from the crank-shaft, substantially as and for the purpose set forth.

2. The combination of a lathe -spindle, a crank-shaft mounted on the headstock or supporting-head of said spindle, a gear adapted to vibrate about an axis on the head-stock, a connecting-rod coupled to a pin on the crankshaft and to said gear, and a pinion secured upon the spindle and meshing with said gear, substantially as set forth.

3. The combination of a lathe-spindle, a cone-pulley fitting freely thereon, a crankshaft mounted in bearings in the head-stock or supportinghead of the spindle, gearing for rotating said shaft from the cone-pulley, a gear adapted to vibrate about an axis on the head-stock, a connecting-rod coupled to a pin on the crank -shaft and to said gear, and a pin ion secured upon the spindle and meshing with said gear, substantially as set forth.

4. The combination of a lathespindle, a cone-pulley fitting freely thereon, a back gearshaft and a supplemental crank-shaft, each mounted in bearings on the head-stock or supporting-head of the spindle, gearing for rotating the back gear-shaft from the cone-pulley, a pinion fitted to slide longitudinally on the back gearshaft and to engage either a gear on the crank-shaft or a gear fixed upon the spindle, a gear adapted to vibrate about an axis on the head stock, a connecting rod coupled to a pin on the crank-shaft and to said gear, and a pinion secured upon the spindle and meshing with said gear, substantially as set forth.

5. The combination of a lathe-spindle, a lathe carriage or saddle, two tools or cutters, each mounted in an independent slide-block on the carriage, two feed-screws, each governing the movement of one of said slide-blocks toward and from the center line of the spindle, and two pinions, each mounted upon one of said feed-screws, either of said pinions being fitted to slide longitudinally upon its feedscrew, so'that said pinions may beiengaged or disengaged to enable either coincident or independent movement of the slide-blocks and tools to be effected, substantially as set forth.

NICHOLAS THOMAS.

WVitnesses:

N. J. BASSETT, M. E. WHITE.

IIO