US441411A - Stock-feeding device for screw-machines - Google Patents

Description

(No Model.) 3 Sheets-Sheet '1.

AJ. HARTNBS'S; STOCK PEEDING DEVICE PCR SCREW MACHINES.

Patented Nov. 25, 1890.

3 Sheets-Sheet 2.

(No Model.)

J. HARTNBSS.

STOCK PEBDING BB1/71GB FCR SCREW MACHINES.

No. 441,411. Patented. Nov. 25, 1890.

INVEMTDR fue "cams versus cu.. moro-Lamo., wAsumnrnu, u. c.

(N Model.)

' v 3 Sheets-fShet 3. J. HARTNBSS. STOCK FEBDING DEVICE FOR SCREW MACHINES.

No. 441,411. Patented Nov. 25, 1890.

MTM-:S555:

' l INVENTDR:

'lathe accompanying drawings, forming a n "ing and operating devices embodyingV my im- 'prcvementsthe front plate of said head being vremoved to show more Aclearly the internal parts. jFigxQ represents a section on lineI -'PATEENT FFICE.

` JAMES IIR'INESS, yOF SPRINGFIELD, VERMONT.

STOCK-FEEDING DEVICE FOR SCREW-MACHINS.

SPECIFICATION forming part of Letters Patent No. 441,411, dated November 25, 1890. A' "Apparition mea August 1s, 1890. serinrassasll. (No mode.) p,

To @ZZ whom t may concern:

Beit known that I,JAMES HARTNESS, of Springfield, in the county of 'Windsor and :Mechanism for ScreW-lVIachines, of which the following isa specification.

for feeding tated Aon their own axes while revolving, 'as

shownin Letters Patent of the United States: i5 n bld-,425,372 of date April S, 1890.

p art ofthis specification, Figure l'represents `a frontend elevation of the rotary head, the' y'feedlrolls therein, and the feed-roll support- `2 2, Fig. l. Fig. S'represents a section'on line 33, Fig. 1. Fig. represents a section on line i 4,' Fig. 2. Fig. 5 represents a section online 5 5, Fig.' 4. Fig, 6 represents aside view of the, annular worm'or scroll, hereinafter referredtd he same letters l same parts in all the figures.

Infthe drawings, a represents'a head or holder, whichmay be affixed yto theI tubular" 'spindle l2 of a lathe by any suitablemeans.

'i Vd @represent the feed-rollsV whi'ch'feed the stock, or, inother words, the rod orwire from c whichscrews or other'like articles are made by the mechanisnrwith which the machine to g which my improved feeding devices are applied is provided; The shafts e e, to which' The invention has for its object, first, to' provide simple, strong,`and eifective means?` for supporting'the feed-rollswithin the rotating head whichy containsv them; secondly,"t o Yprovide'improved means for simultaneously rotating said rolls' while they are I revolvingA about theaXis ofthe head, and, thirdly,1togi f provideimproved' means for adjusting` 'tlie ,rolls tothe sizeof the said bars, 1 ods,'orwi`res`. f To; theseendsjthe invention consists in the improvements whichA I will now proceed toi -describe and claim. I"

of reference indicate the f said feed-rolls are attached, are journaled in blocks ff', which are adapted to slide on suitable guides or ways inthe head a, the movement of said blocks being such that the feedi rolls, which are arranged at opposite sides of the axial center of the head, can move radially, and thus approach and recede from 'each other to accommodate stock of any diameter within the capacity of the machine.

g represents a scroll or worm, which is a ring tted to rotate on the exterior of the neck a of thehead, said ring being provided onone side with teeth g', which are cnt tangentially, each tooth being a tangent of a circle of lesser diameter than the interior of the ring, as shown in Fig. 6. 157th represent right and left hand Worms,

which are rigidly connected, and i represents a1 worin wheel or gear, which is located be tween saidworms and is rigidly connected therewith, said worms and Wheels being here shown as all formed in one piece and adapted to .rotate on'` a stud or bearing j, affixed to the head' a.' lThe said worm-wheel t' has its teeth formed to engage'the tangential teeth g of the scroll or' worm g, while the right and left worms 71. 7L' engage corresponding wo rin-wheels 7c 7s, aflixed to the shafts of the feed-rolls. The

said worm-gear i, worms h h, and worm-gears 7o k'constitute connections between the feedroll shafts and the annular worm or scroll g, whereby the feed-roll shafts may be simul- `taneously rotated in opposite directions when the head a is rotated and the annular worm or scroll is held stationary, the worm or scroll when thus held causing the gear l1J and Worms h h tov rotate on their common axis while they are being revolved about the center of the head by the rotation of the latter, while the worms impart rotary motion to the feed-roll shafts, each feed-roll being thus given aplanetary motion-viz., a revolution about the center of the head by the rotation of the latterand a rotary movement on its `own axis by the described connection with the annular worm or scroll. It will also be seen that the connection between the annular worm or scroll and the feed-roll shafts is equally oper- Aative under all adjustments of the feed-rolls,

IOO

sothat the rolls are rotated in the manner dei scribed in'any of the positions to which they may be adjusted.

Vlien the annular Worm or scroll is left loose or idle and permitted to rotate with-the head, there will be no independent rotation ot' the feed-rolls, and they will simply revolve idly about the center of the head without feeding the stock.

The annular Worin may be made operative to cause the above-described rotation of the feed-rolls in any suitable Way. For example, it may be prevented from rotating when it is desired to cause the feed-rolls to operate by means of a friction band or brake applied to the periphery of the ring Whichcompe'ses the annular Worm in the saine manner that the loose gear fm (shown in my patent above referred to) is held to operate the feed-rolls lshown in that patent. I have not illustrated saidV band and lthe devices that operate it in the .present case, becausev the application of the 'devices shown in my former 'patent to the annular Worin g will be perfectly obvious.A M-y invention is not limited, however, to the friction-band as the means for holding the annular yWorm g -nor to a normally-loose Worm and devices for holding the saine to make it inoperative. The same result may be pro-v duced by continuously or permanently holding the 'annular Worm so 'that vit. cannot 'ro-j tate and moving the 'same laterallyinto and out of engagement with the Worm-,gear i to make it operative and in pe`1`rative.

I do not limit myself to the devices here shown for imparting rotary motion to the feed-rolls While 'they are revolving about the center of the chuck, but may use any other suitable means adapted to operate the radi- 4ally-'adjustable feed-rolls in any of the posi-Y tions 'to which they may be adjusted, the feay ture of my invention toWh-ich I attach thel most importance being the feed-rollsand the feed-roll 'carrying-blocks 'adjustable radially on guides orways inthe rotary head.

For yadjustin-g the feed-rolls to the 'dia'me-'g ter of 'the stock have here shown 'a bolt o, which is 'screv'v-tl'i'readedV at one end and enf gaged atits 'screw-'threaded portion with the blockf. The unthreaded portion of the bolt: passes through the 'other block f', l'an'd'is provided jw'it'h a slotted head o', which permits vthe bolt to be turned rby `a suitable tool. A

spring 29in'terposed between fthe head yot' the bolt and the bottom of an enlargement of fthe socket in the block f', presses `said block against the ends of a pin @which is 'inserted -i'n the -loolt o between the blocks. 'lfhe lrota-l tion Aof :the bolt in one direction causes it to increase the distance between the'block's and feed-rolls, While a rotation of said bolt in the opposite direction decreases the distance b'e-g twee-n the blocks 4and feed-rolls. y

The feed-rolls [d d do not act to center 'the g 'stock Yin 'the head, the stock being held cen-- tral by a centering-bushing u, which lis re movably inserted in the 'face-plate @of the head d, and has an oriiice formed fto closelyl fit thestock, said orifice being at the axial,y center of the head. The bushing u, may be*y assisted, when heavy stock is used, bythe centering-screws c c` in the neck of the head a. A separate bushing is employed for each size of stock, the bushing being externally screwthreaded and screwed into an internallythreaded opening in the face-plate er.

The feed-rolls and their support-ing-blocks are loosely mounted in the head and conform to the position in which the stock is held by the centering devices.

I claiml.` The combination of a rotary head or helder, a plurality lof feed-rolls within the same arranged to bear simultaneously on the/ stock, which occupies the axial center of the head, blocks adapted to slide radially in the.y head and supporting the .shafts of the feedrolls, and means for simultaneously rotating said rolls, as set forth.

2. The combination of a lrot-ary head or holder, a normally-.loose annular Worm or scroll concentric with the axis of the head, `a plurality of feed-rolls in the lhead arranged to bear simultaneously on the stock, blocks adapted to slide radi-ally in the'head 'and supporting the 'feed-roll shafts, and connections between the said feed-rolls'hafts and annular Worm, whereby said rolls may be simultaneously rotated, as set forth.

3. The combination `ot" the rotary head or holder, a plurality of feed-rolls Within the same 'arranged to bear simultaneously 'on the stock, which occupies the Vaxial 'center of 'the head, blocks adapted to slide Vradially in the head and supporting the shafts of the Ifeedrolls, and 'adjusting devices whereby said blocks maybe moved toward or from each other to decrease or increase the distance between the feed-rolls, as set forth.

4. lThe combination ot' a rotary head or holder, a normally-loose annular Worm or scroll concentric With the axis of 'the head,-a

plurality of feedrolls in the head arranged to bear simultaneously lon the stock, blocks adapted to slide radiallyv in 'the head .and supporting the feed-roll shafts, the Worm-gear, and right and left `gears 4connected 'to rotate together in said head, said Worm-gear-mesh'- ing with the annular `Worm or scroll, and the worm-gears onf'the feed-roll shafts meshing with the said right and left Worms, asset for-th.

5. The combination of a rotary head or holder, a normally-loose annular Worm or scroll concentric with Vthe axis of 'the'head,a plurality of feed-rolls in the head arranged to bear simultaneously on the stock, blocks adapted to slide radial-lyin the head and supporting the feed-roll shafts, the Worm-gear,

and right and 'left gears connected to rotate together in said head, said worm-,gear meshing with the annular worm or scroll, the Worin-gears on theffeed-roll shafts meshing with the said right andleft'worm's,wandvdevices IOO for 'adjusting saidblocks to varythe distance p 'between the vfeed-rolls, as set forth.

6. The combination of the rotary head, the

blocks adapted to slide radially in said` head, the shafts journaled in said blocks, the feedrolls attached to the shafts, means for simultaneously rotating said shafts and rolls, and

5 the block-adjusting devices comprising the headed bolt having` a screw-thread connection with one block and a loose connection with the other, one or more projections on said bolt between the blocks, and a spring in- Io terposed between the head of the bolt and the block adjacent to said head, as set fort-h.

'7. The combination of the rotary head, the blocks adapted to slide radially in the head and loosely mounted therein, the shafts jour# July, A. D. 1890.

JAMES HARTNESS.

lVitnesses E. R. FELLoWs, T. CHYNOWETH.

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