US786242A

US786242A - Sliver-evening device for drawing-frames.

Info

Publication number: US786242A
Application number: US21035104A
Authority: US
Inventors: Valorus S Westcott; Frank W Potter
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-05-31
Filing date: 1904-05-31
Publication date: 1905-03-28
Anticipated expiration: 1922-03-28

Description

No. 786,242. PATENTED MAR. 28, 1905. V. SFWESTGOTT 6: P. W. POTTER.

SLIVER EVENING DEVICE FOR DRAWING FRAMES.

- APPLIUATION FILED MAY 31,1904.

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No. 786,242. PATENTED MAR. 28, 1905.

- V. S. WESTOOTT. & F. W. POTTER.

SLIVER EVENING DEVICE FOR DRAWING FRAMES.

APPLIOATION FILED MAY 31, 1904.

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No. 786,242. PATENTED MAR. 28, 1905.

v.3. WESTGOTT & F. w. POTTER. SL'IWEQZEV'ENING DEVICE FOR DRAWING FRAMES.

APPLIOATION FILED MAY 31, 1904.

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UNITED STATES Patented March 28, 1905.

PATENT OFFISIE.

VALORUS S. VVESTCOTT, OF PAWTUCKET, AND FRANK W. POTTER, OF CENTRAL FALLS, RHODE ISLAND.

SLlVER-EVENING DEVICE FOR DRAWING-FRAMES.

SPECIFICATION forming part of Letters Patent No. 786,242, dated. March 28, 1905.

Application filed May 31, 1904. Serial No. 210,351.

To all whom it may concern.-

Be it known that we, VALoRUs S. Vl' ns'rcor r, a resident of Pawtucket, and FRANK WV. POT- TER, a resident of Central Falls, in the county of Providence and State of Rhode Island, citi- Zens of the United States of America, have invented certain new and useful Improvements in Sliver Evening Devices for Drawing- Frames, of which the following is a specification.

Our invention relates to certain improvements in sliver-evening devices for drawingframes and kindred machines; and it consists in the novel construction and combination of parts hereinafter set forth and claimed. The object we have in view is to produce an evener, so called, possessing a greater degree of efficiency and capable of being actuated with less power than devices of this class as usually constructed.

By means of our invention the Work or output is materially increased, the sliver produced being at the same time more uniform or homogeneous throughout. These advantageous results are attained through the medium of the instrumentalities forming the subject of the present application for Letters Patent.

In the accompanying three sheets of drawings, Figure 1 is a plan view of a drawingframe provided with our improvements, some of the minor details being omitted. Fig. 2 is a corresponding side elevation. Fig. 3 is an end view in partial transverse section, some of the driving mechanism, &c., being omitted, the plane of said section being taken on lines 1: w of Fig. 1; and Fig. 4 is a side view showing a modified form of the evener-roll and the fellow rolls or wheels cooperating therewith.

It may be stated that in railway-heads or drawing-frames as usually constructed the sliver-eveningoperation is effected at the front side of the headthat is, intermediate the front drawing-rolls and the calender-rolls. In

our invention we employ evener-rolls located,

at the back of the drawing-rolls, whereby any appreciable variations in the thickness of the moving slivers operates through the novel d evice to automatically change the speed of the back drawing-rolls slower or faster, as the case may require, thereby delivering the sliver to the positively-driven front and calender rolls in a uniform manner.

In carrying out our invention the front drawing-rolls '2' and calender-rolls s of the drawing-frame may be mounted and driven in any wellknown way. In the drawings herewith the said rolls '1 are rotated by a shaft (4, adapted to run at a uniform rate of speed by a belt a, driving a pulley a secured to said shaft, the calender rolls being positively driven by means of gearing, &c., as usual. The said rolls 9', shaft 0/, &c., and also the back drawing-rolls 1" and evener-roll m are mounted in suitable bearings secured to a base or table a, as clearly shown. To the front end of said shaft a is secured a driving-disk (Z, from which power is transmitted through an interposed friction-wheel c to an oppositelydisposed friction-disk cl, secured to a yielding or endwise-movable shaft 6, revolubly mounted in bearings b I). The said rolls r and m are driven by means of suitably-arranged gear-trainsf, f, and f connected therewith and with the variably-driven shaft 6. (See Fig. 1.)

e prefer to provide the shaft Z) with a thrust-bearing having antifriction-balls 7)", a screw-threaded portion 1), a nut b, movably fitted to said thread, and a helical spring 11*, interposed between said nut and thrust-bearing. By means of this arrangement the degree of frictional contact between the wheel 0 and disk d may be controlled as desired.

It is obvious that the speed ratio of the disk (Z to the driving-disk (Z is governed by the relative position thereto of the small frictionwheel c that is to say, if the axis of the latter be moved toward the uniformly-revolving driving-shaft a the speed of disk (Z will be correspondingly reduced, and if it be moved in the opposite direction or toward the driven shaft 5 the speed will be increased. This principle of operation is utilized to change the speed of the back drawing-rolls o" and the evener-roll m when variations occur in the normal thickness of the traveling slivers 71 For example, when the sliver exceeds the normal thickness the speed of said rolls should be correspondingly decreased and, conversely, the speed increased when the. sliver is less than the normal thickness. In order to automatically effect such change in the speed of the said sliver-operating rolls the frictionwheel 0 is revolubly mounted in a yoke c, Fig. 3, adjustably secured to an end wise-movable horizontal rod 0, supported in fixed bearings 0 the rear end portion a of the rod being slotted longitudinally at (5 and carrying a roll a and counterweight w. Contiguous to the rear end of the rod is secured a standard 7), its upper end being slotted at p to receive a pin or fulcrum p, on which is pivoted the bell-crank lever Z, the lower end of which latter is yoked to receive said roll 0'. The horizontal arm I of the lever is provided with a small slidable llanged wheel W, all as clearly shown. Thus it is clear that upon vibrating the arm Z the part/ will simultaneously move the rod and its friction-wheel 0 forward or backward as the said arm is raised above or de pressed below the horizontal or normal position. The distance thus traversed by the wheel corresponds to the ratio of the two members of the lever.

Another feature of our invention resides in the novel construction of the evener-roll 1/1 combined with equalizing means for transmitting any variations in the thickness of the slivers ii to the said wheel-controllii'ig lever Z. The evener-roll m is located at the rear of the back drawing-rolls w and is provided with a number or series of concentric peri 'iheral grooves in, adapted to receive the several slivers. A small independent wheel or disk n. is mounted to turn freely in each groove, its periphery being arranged to bear directly upon the sliver passing between it and the bottom of the groove. A light verticallymovable yoke '21 has the wheel '12 journaled therein, the upper end of the yoke being adapted to form a'seat or fulcrum for the small knife-edged saddle a, the latter in turn constituting a fulcrum for the upper and larger saddle u and being in engagement with the under side of the horizontal equalizinglever 1'', thus formil'ig a live fulcrum u, as clearly shown in Fig. 2. The said lever Z: extends into the upper end of a hollow standard and is pivoted or l'ulcrumed therein at a screw and nut 1 being employed for effecting an accurate adjustment of the parts. The lever is kept in position laterally by means of integral lugs g. The outer or free end 7: of the lever is slotted to receive the said flanged wheel 4 of the bell-crank lever Z. The said yokcs a are vertically guided in a fixed bar or member n, to the opposite sides of which are secured upwardly-extending cheeks 11 Fig. 3, adapted to maintain said saddle members a a in position laterally.

From the foregoing it will be apparent that any variation in the thickness of the sliver le passing from the tension-roll Z to and between the grooved portion m of the evenerroll and the corresponding disks '11, previously adjusted or weighted to the work or output, as desired, will be greatly multiplied through the medium of the compound levers employed, thereby automatically changing the position of the continuously-revolving friction-wheel 0 a corresponding extent and causing the evener and drawing rolls m r, respectively, to revolve slower or faster, as the case may be, with respect to the uniformly-revolving front d i-a\\ 'ing-rolls r and calender-rolls s, the result being to automatically slacken the speed of rolls in and r in case the sliver becomes temporarily thicker than normal, thereby in the meantime permitting the faster revolving front rolls '2' to draw the sliver down to the normal thickness, and thus feed a practically uniform quantity of sliver or material to the calender-rolls at all times. In case the sliver is of less thickness than normal when it enters the evener-roll the mechanism automatically acts to quicken the speed of said rolls 1/1 and i" in excess of that of the front rolls, so that the amount or quantity of material entering the rolls r and s is substantially the same in any event.

In lieu of the grooved roll m and wheels .11. the former may be provided with a corresponding number of concentric peripheral projecting ribs 112., Fig. 4, each having an independently mounted vertically movable freely-turning flanged wheel a engaging therewith, the sliver in this case passing between the adjacent surfaees substantially as before described with respect to the grooves m and disks n.

Each pair of slivers it, passing from the rear tensionroll t, may be combined to form a single sliver, each of which latter is in turn drawn through a stationary trumpet e,which guides it to the respective groove of roll m. The several slivers pass from said roll to and between the rear d rawing-rolls r and then to the front drawing-rolls '2', the sliver issuing from the latter rolls then being practically a single one having a greater width than the initial or normal sliver. The sliver next in passing through the front stationary trumpet n and calemler-rolls s is somewhat contracted and compressed or condensed, the action of the latter rolls being substantially as common in producing the discharged sliver /1,.

\Vc may add that in order to counteract the tendency of the revolving driving-disks (Z (Z to advance the friction-wheel c and its supporting-rod e a suitably-mounted counterweight w attached to the rear end 0 of the rod, as clearly shown in Fig. 3.

\Ve claim as our invention and desire to secure by United States Letters Patent 1. In a sliver-evening device for drawingframes,having front or delivery drawing-rolls, drivingmechanism for revolving them at a substantially uniform rate of speed, and rear rolls 7" for feeding a plurality of independent slivers between them to said front rolls, the combination therewith of sliver-evening mechanism comprising a revoluble evener-roll m, a revoluble yieldingly-mounted wheel for each sliver, said wheel being actuated by said roll m, variable driving means taking its motion from the said front driving mechanism for rotating the said rear and evener rolls, andan automatic equalizing device having its movements controlled by variations in the thickness of any one of the slivers While the latter are passing between the said evener-roll and wheels.

2. In a drawing-frame having front drawing-rolls and mechanism for rotating them at a uniform or invariable rate of speed, said mechanism including adriving-disk (Z revolving in unison with the same, the combination therewith of a plurality of pairs of rear rolls which deliver the slivers to said front drawing-rolls, a yieldinglymounted oppositelydisposed fellow disk cl revoluble in the same direction as the said driving-disk, a freelyturning beveled-faced wheel 0 interposed between and in frictional engagement with the working faces of both the said disks, an evener-roll and revoluble independent wheels a coacting therewith, between the adjacent peripheral surfaces of which the slivers pass to the said rear rolls, means connected with the disk cl for rotating said evener and rear rolls, and a device operatively connected with said revoluble members 0 and n for automatically changing the speed of said rolls, substantially as hereinbefore described and for the purpose set forth.

3. In a drawing-frame, the combination with the front drawing-rolls and driving mechanism therefor arranged to revolve them at a uniform rate of speed, of a plurality of pairs of rear rolls between which the sliver passes, means for revolving said rear rolls, said means being operatively driven by the first-named driving mechanism, and suitably mounted compound or multiple levers adapted in their movements to automatically change the speed of the said mechanism which rotates the rear rolls, one of the latter rolls being provided with. a guided and weighted freely-turning wheel for each sliver, whereby variations in the thickness of the slivers while passing between the adjacent peripheral surfaces of said roll and wheels cause the levers and connected mechanism to become operative.

4. In a sliver-evening device for drawingframes, the combination with the evener-roll m and mechanism adapted for driving the same at variable rates of speed, of a plurality of independent freely turning yieldinglymounted wheels between the peripheral surfaces of which and the said roll the slivers pass, and a speedchanging device operatively connected with said wheels and with the rolldriving mechanism for automatically changing the speed of rotation of the roll, slower or faster as the case may be, whenever the thickness of any of the passing slivers varies from the normal.

5. In a drawing-frame provided with uniformly-driven front drawing-rolls between which the slivers pass, and rear sliver-feeding rolls adapted to be driven at varying rates of speed, the combination therewith of a friction-driving disk (Z revolving in unison with said first'named rolls, a spring-pressed endwise-movable revoluble fellow disk (Z oppositely disposed with respect to said disk (Z, said two disks being arranged to turn in one direction, a freely-revoluble wheel 0 interposed between and in continuous frictional engagement with the working faces of both disks, and means including independent yieldingly-mounted disks a arranged with respect to said rear rolls and operatively connected with the wheel 0, whereby variations in the thickness of the passing slivers, greater or less than the normal thickness, causes the said wheel to be automatically advanced or retracted, thereby respectively decreasing or increasing the speed of the rear rolls, substantially as described.

Signed at Providence, Rhode Island, this 28th day of May, 1904.

VALORUS S. IVESTCOTT.

FRANK \V. POTTER. Witnesses:

GEO. H. REMINGTON, (J. E. INGE.