US872804A - Drawing mechanism for spinning-machines. - Google Patents

Description

No. 872,804. I PATENTED DEC. 3, 1907. G." A. FARLBY.

DRAWING MECHANISM FOR SPINNING MACHINES. APPLICATION FILED MAY 2, 1907.

2 SHEETS-SHEET 1.

M'Znesses: 6 Y I [7206722071 GQA. FARLEY. DRAWING MECHANISM FOR SPINNING MACHINES.

APPLICATION FILED MAY 2, 1907.

PATENIED DEC. 3, 1907.

2 SHEETS-SHEET 2.

Wiin eases:

IIT

GEORGE AHFARLEY, OF LAIWRENOE, MASSACHUSETT8.

DRAWING: MECHANISM FGR SPINNING-MAGHINES;

are, erases.

Specification of Letters Patent;

Patented Dec. 3, Iii- 07.

Applicati fil d May 2, 1907. seen No. 371.402.

' nection with the accompanying drawings, is

a specification, like characters on the drawings representing like parts. I

In s inningframea-h'a'ving the usual three setso parallel drawing rolls, it is necessary to adi'ust the distance between the front and midd e drawing rolls according to the length of the staple. With certain adjustments of these rolls, much diliiculty is often expe- Iienced with what isjtermed as lap ing,

due to the breaking of the roving whi c it is being drawn out between the middle and the front rolls, and the subse uent winding of the broken end andsucceed ing roving about the lower middle roll. I have observed that the nearer the two lower rolls are adjusted, the less likely is this diiiiculty to occur, for the. reason that the front lower roll is more likely to pick up the broken end and. carry it along when it is running close to the lower. middle roll than when running at some distance therefrom. I have discovered that if the stretch or length 'of roving between the points at which it is hold is increased without increasing the distance between the lower rolls, the difliculty of lapping will be,

in a large measure, avoided.

'In practice the lower rolls are of steel and are ositively driven by gearing at their ends, whi e the upper rolls are of leather and run idle.- In order to vary the distance, therefore, between the lower rolls it is necessary to change the location of the driving gears, which is a matter of some difficulty and in-.

volves stopping the machine. while the adjustm'ent is being made.

The ordinary gang of drawing rolls is provided with a thread guiding means, usually drawing rolls at different points and prevent-' ing the tendency to wear grooves therein, which would otherwise becaused. In order rod should be held. from the rolls having been determined by experience, which distance must be maintamed-in order that satisfactory' results-may be secured.

The object of my invention is to provide means whereby the rolls may be relatively adjusted. for long or short stock without changing the relative positionsoi? the lower front and middle rolls, so that they may always be run. close together, and without varying the distance between the traverse bar and the point of engagement between-the r'ear rolls, and, further, without in any way disturbing the driving gears, or stopping the machine. I, accomplish this object by the means shown by the accompanying draw-- ing, in which,

Figure 1 is an end elevation of the drawing roll stand provided with my invention. Fig. 2 is a section on line 22 oi 3, showing the parts in a dilieront position of adjustment from Fig. 1. Fig. 3 is a plan view of a'series of drawing rolls including two ad acent stands provided with my in 'vention. Fig. 4 is a detail view of tie the lines 5- 5 and 66 of Fig. 3.

The stands a are of ordinary form having open bearings a formed therein for thelower front roll I), and. a bearing piece 6 is secured to the upper side of each stand a and may be made integral therewith, so far as my invention is concerned, and preferably is made in tegral therewith in most instances, although in some instances it may be desirable toad just it thereon. Each bearing piece 0 is provided with open bearings c, c for the middle and back lower rolls (1 and e respectively Said rolls 6, d and e are driven by in tel-mesh ing gears in the usual manner, as indicated in .Fig. 1. A bracket f, comprising a-flat plate,

having a transverse slot f at its. front end and a pivot slot f in the middle thereof, is

adjustably secured to the upper side of each .A thread guiding red as, alled the traverse rod, is sl'idably mounted in the slots; f" of brackets f. said rod being provided with the usual thread guiding apertiires cc and being disposed closely adjacent the rear rolls as shown. the rod is not substantially dill'erent from means already known in the art and com- T he means shown for reciprocating i prises a .pair of depending arms m 90 which are mounted on red at and engage opposite sides of a cam 3 mounted on a shaft .2, said shaft being journaled in an adjacent stand a,

and having a worm wheel to thereon which engages a worm 0 formed on the lower back' roll 0, so that when the roll 0 is'rotated said rod will be slowly reciprocated.

A series of gap bars are pivotally mounted in the slots f of brackets f by means of pivot bolts 7L which rest therein. The cap-bar, shown in Fig. 3, is shown as comprising a series of three roll holding arms 71, if, 7?, al-

- though five arms are frequently employed,

the end arms i, i being provided at their adjacent sides, and said middle bar '11 at each Y side with bearing slotsi, each slot being open at its upper end and adapted to.receive loosely the .m'iddle and back upper rolls and for a short staple,'that is, the front and mid dle lower rolls are so held that they runtogether as closely as practicable, and, when they are adjusted in this position, practically no dillieulty from lapping is experienced. In this position the upper rolls bear on the corresponding lower rolls at approximately the.

points of common tangency, so that the thread or roving 1' is drawn straight as it passes from the rear to the front rolls. is desired to adjust the two front sets of rolls for alonger staple, that'is,- to increase the length ofthe roving between the point at which it is held and the'point at which the drawing pull is applied, so that single fiberswill not be simultaneously engaged and consequently broken, the clamping bolts 9 of each of the brackets f are loosened and pushed back, carrying the cap-bars and toprolls with them, to the extent which it is desired to increase said length. The top rolls will then no longer bear upon the lower rolls at the points of common tangency, but on points in the rear thereof, so that, to make this adjustment eil'ective, the extension pieces m, m, m are then adjusted forwardly, so that the front upper rolls are held in the position of common tangency again, and the adjusted parts are in..the position of Fig. 2. The middleand back upper rolls will be in a lower position with relation to the cap-bar, when in the position of Fig. 2, than when in that of Fig. 1, but the length of roving drawn at one time or the distance between the points of rolling contact of the middle and front rolls Ifit' parallel series of u is thus increased to the desired extent with out changing the positions of the lower rolls, so that, inlthis position of adjustment, if the roving should break the broken end portion will be picked up by the lower front roll.

.The rearward adjustment of the bracket f also carries the traverse rod 00 rearwardly, its driving connection with the lower rear roll not being interfered with by this movement, as the fin ers w, .11, may be moved transversely of t e face of the cam y for some distance without being moved out of engagement therewith. The result isthat the thread is guided at the same distance from the points of rolling contact. between the upper and lowerrear rolls, as it was before the parts were adjusted, so that the roving will be guided back and forth between these rolls as advantageously as it was before. Moreover thetraverse rod is necessarily located so close to the rear rolls that adjustment to an extent which is usuall necessary would carry the upper roll bac against the traverse rod or so close thereto as to interfere with the pro er working thereof, so limiting the range of adjustment that the above described adjusting means would otherwise be of little practical value.

It will be understood that all of the capbars on one side of a frame will be adjusted practically together, so that adjustment of the brackets will move the wholeseries of 4: parallel series of u per and. ower drawing rolls, bearings in w ch said lower rolls aremounted, andmeans for driving said lower rolls, cap-bars for holding the u er rolls in osition over said lower rolls, sai bars hav m extensible portions between said upper ro ls to permit relative transverse adjustment thereof, a thread guiding rod, and brackets to which said cap-bars are pivotally connected and in which said guiding rod is slidably mounted, said brackets being mounted onsaid support and having an adjustable connection therewith permitting adjustment thereof transversely of the rolls, substantially as described.

2; The combination of a su port having a rolls, bearings in w ich said lower rolls are mounted, and means for driving said lower rolls, cap-bars for holding the upper rolls in er and ower drawing position over said lower rolls, said bars havlng-extensible portions between said upper rolls to permit relative transverse ad uStment thereof, a thread'guiding rod, brackets to neotion therewith permitting adjustmentthereof transversely of the rolls, and means for reciprocating said rod permitting transverse adjustment thereoi, substantially asdescribed.

Intestim'ony whereof, I have signed my name to this specification, in the presence of 15 two subscribing Witnesses.

GEORGE A. FARLEY.

\Vitnesses L. H. HARRIMAN, H. B. DAVIS.

Images