US375131A

US375131A - James cowgill

Info

Publication number: US375131A
Authority: US
Publication date: 1887-12-20
Anticipated expiration: 1904-12-20

Description

(No Model.)

J. OOWGILL.

. LOOM. N0.v375,13'1. Patented Dee. 20, 1887.

N. PETERS. PhnlwLxlhugmpher, Wnihngtan. D. C.

UNITED STATES PATENT OFFICE.

JAMES COWGILL, VOF LOWELL, MASSACHUSETTS.

LOOM.

SPECIFICATION forming part of Letters Patent No. 375,131, dated December d, 188,7,

Application led March 7, 1887. Serial No. 229,958. (No model.)

and to steady the shuttlein its movement across the lay.

In the accompanying drawings, Figure l is an end elevation of so much ot' a loom as is necessary for the understanding of my invention, and my invention attached thereto; Fig. 2, a front elevation of part ofthe loom-frame, the lay and its usual appurtenances, and a shuttle on said lay, the picker-sticks, piekerstraps, picker-levers, the cams which operate them, the driving-pulley, theloose pulley, the

dagger-rod, the warp-beam, and my improvements; Fig. 3, a side elevation of the beamhead gear, the gear on the frictionpulley,and the intermediate gear which connects said gears; Fig. 5t, a section on the line x min Fig. l; Fig. 5, a section on the line y y in Fig. 1.

The frame A, lay B, its beam b, lay-shaft b', pickersticks C C', the so-called Stearns parallel motion77 c, the shuttle-bindersDD, their pivots d d', the shuttle-boxes E E', the warpbeam F, main shaft G, fast and loose pulleys g g', cranks g2, connected by pitmen g3 to the lay, the cam-shaft H, provided with cams 7i h', picker-levers I I', provided with shoes it" and pivoted at their rear ends to the frame A,and connected to the picker-sticks C C by pickerstraps J J, and the picker-strap rolls j j', are all of the usual construction and operation.

In Fig. 2 the shuttle is represented as mov-4 ing from right to left. Ordinarily'the shuttle enters the shuttle-box against the resistance of the binder, which is pressed backward toward the back of the shuttle-box by a stiff spring, and the shuttle is driven out of the shuttle-box by the picker (not shown) attached to the picker-stick, near the upper end of the same, striking the end of the shuttle with a force sufficient to overcome not only the inertia of the shuttle,but the friction of the shuttlebox and binder.

I dispense with the binderspring and push the binder inward by means hereinafter described, and just previous to the striking of the shuttle by the picker I release the binder.

The picker-straps which connect the pickersticks and their respective picker-levers pass under the rolls j j in the usual manner, so that when either picker-lever is raised in the usual mannerv by the revolution of the cam-shaft H its pickerstrapdraws the upper end of the picker-stick to which it is connected inward, or toward the middle of the lay, and throws the shuttle before it out of one box and into the other. When the frontend of the picker lever falls, the picker-strap slackens and the upper end of the pickenstrap is thrown outward by means of a spring, c', roll c?, and strap c3 of the Stearns parallel motion.

On the rod K, which forms the pivot of each of the rolls j j', turns a balance or lever L L', the inner end of which lever reaches under a picker-lever, and to the outer end of v which is pivoted a roll, Z, immediately below and incontact with the picker-strap. Vhen the pickerlstick is thrown outward,as above described, the roll Zpresses against the pickerstrap and draws the picker stick inward slightly, out of contact with the outer end of the picker-stick slot, the picker-lever at this time resting upon the inner arm of said lever L. When the shuttle, after entering the shuttie-box, strikes the picker and drives'it back toward the end of the slot in which the pickerstick moves, the elasticity of the picker-strap serves to check the motion of the shuttle gradually, and iinally to stop it, so ,that Very little pressure need be applied to the binders, which are intended to work so easily as to oppose but very slight resistance to the entrance ofthe shuttle into the shuttle-box, but serve to prevent the shuttle from rebounding. The very slight pressure that is put upon the binders is caused by the pressure ot' the daggerrod fingers M M', which, with the dagger-rod m and dagger m', are of the usual construction and turn in brackets ml m2, secured to the lay in the usual manner. The lever L', pivoted roo on the stud of the roll j', is precisely like the lever L. The dagger-rod m is provided with two backwardly-projecting arms, N N', connected by cords n n or wires-to theinnerarms of the balances or levers L L. The arms N N and the inner arms of the levers L L are provided with a series of holes or notches, ai Z2, respectively, to enable the cords or wires which connect them to be adj listed nearer to or farther from their ends to vary the amount of the pressure of the dagger-rod fingers upon the binders, said pressure being caused by the weight of the picker-levers, which alternately rest upon the inner arms of the levers LL,connected, as above sta ted, to the arms N N of the dagger-rod.

1t requires less power to throw the shuttle when the binder presses lightly upon the shuttle, and I am enabled to attach the pickingstrap nearer the top of the picker-stick, and thereby to throw the shuttle with less force without substantially increasing the time required for the throw of the shuttle.

In order that the shuttle may not be retarded by the varying slackness of the warps, I find it necessary to keep the warps uniformly taut andY the upper part of the shed out of contact with the shuttle in the race.

The friction-wheel o is secured to and turns with the gear O, which engages the inter'- mediate gear, O', which in turn engages the beam-head gear O, the latter being secured to the head j" of the warp-beam F in the usual manner. Themotion of the friction-wheel is retarded by the brake P, which consists of a piece, p, concave in its under surface, and provided at its ends with small rolls, pj, to which are secured ratchets p3 p".

A rope or cordp", secured to the rolls p' p2, may be drawn more or less taut by turning said rolls, which are prevented from turning backward by pawls pspi, pivoted on said piece p and engaging said ratchet.

The tension of the cord is varied by winding or unwinding, to allow it to have a greater or less contact with the periphery of said friction-wheel, and thereby to create a greater or less friction thereon. The brake is provided with an upward projection, p8, provided with a slot, p, to allow the rod K to extend through said projection,.and to allow said projection to rise and fall on said rod. The projection ps and brake P are prevented from moving along on said rod K by nuts lc 7s and checknuts k2 k, which engage a screw-thread on said rod, but which are not turned up close enough to the projection p8 -to prevent the brake from rising and falling'on said rod to vary the friction between the brake and the wheel, as hereinafter described. The rod K slides longitudinally in brackets c c on the frame A, so that the drawing of the warps from the warp-beam causes the gears O O Ol to revolve in the direction shown by the arrows ymarked on them, and causes the friction-wheel to revolve and by friction on the brake to slide the rod K forward.

The rod K is provided with two fingers, 7c* 765, provided with collars k6 k7, which surround said rod and are adjustable thereon by means of set-screws las k. When the rodKis moved endwise out of its normal position, one or the othe of the fingers 7a4 h5 will be struck by the cam 7L, which operates one of the picker-levers, and the rod will be restored to position. The fingers 7a* las are so arranged on the rod K as not to be struck by the cam h when the rod K is in its normal position. The pressure, and consequently the friction, of the brake upon the friction-wheel may be varied by moving the weight Q on the lever q, the latter being pivoted at its front end at q on a bracket, q2, secured to the frame A, said lever q having a downward projection, q, which rests upon the top of the projection p8 ofthe brakep, the weight Q being placed at the outer or rear end of the lever q when the beam is full, and afterward, as the beam is gradually emptied, being moved by hand toward the fulcrum q.

It will be seen that the friction of the brake on the friction-wheel retards the motion ofsaid wheel and of the gears O O' O2, the first of said gears being secured to said friction-wheel and the last, O, of said gears being secured to the head of the warp-beam, and therefore retards the motion of the warp-beam, and, by preventing the warps from being unwound too rapidly from said beam keeps the warps in a proper state of tension and prevents the warps in front of the harnesses from sagging down onto the shuttle.

A sudden slackcning or straining of the warp may cause the brake and the rod K to move back or forth; butin the ordinary operation of the machine the front inger, h5, is not likely to be struck by the cam h. A sudden excessive strain on the warp-yarns would rotate the beam and the gears O2 O O in the direction shown by the arrows and move the brake forward by the friction of the frictionwheel on said brake, and the yielding or forward movement of the brake would immediately relieve the str'ain on the warp-yarns, whereas if the brake were immovable some of the warp-yarns would be likely to be broken by such sudden strain.

Vhen the improvements above described are used, the shuttle is less liable to be thrown out of the race, because the upper part of the shed is held out of contact with it, and the shuttle is thrown with less force and with greater steadiness, and for the same reasons the warps are less likely to be broken out.

I claim as my invention- 1. The combination of the picker-sticks, the picker-levers, the picker-strap connecting said picker-sticks and picker-levers, the pickerstrap rolls, the binders, the dagger-rod having fingers resting against said binders and provided with arms, the balance-levers, rolls on the outer ends of said balance-levers below said picker-straps, and cords or wires connecting the inner ends of said balance-levers and the arms of said dagger-rods, the inner arms of said balance-levers being arranged to be struck by said picker-levers and to press IOO IIO

said dagger-rod fingers against said binders, the cam-shaft and its cams which operate said picker levers, as and for the purpose specified.

2. The combination of the picker-sticks, the picker-levers, the picker-straps connecting said pickersticks and picker-levers,the pickerstrap rolls, the balance-levers, rolls on the outer ends of said levers below said pickerstraps, the inner arms of said balance-levers being arranged to be struck by said pickerlevers to press the rolls pivoted to the outer ends of said balance-levers against said pickerstraps and to take up the slack of said straps, and the camshaft and its cams which operate said picker levers, as and for the purpose specified.

3. The combination of the warp-beam provided with a gear, the friction-whee1 provided with a gear, an .intermediate gear engaging each of said rst-named gears, the brake provided with an upward projection slotted vermeans, subing said fingers when said rod is in its normal position, 'and by striking said fingers when said rod is moved out of position by the friction of said wheel and brake on each other to restore said rod to its normal position, as and for the purpose specified.

In witness whereof I have signed this specitication in the presence of two subscribing witnesses.

ALBERT M. MOORE, ALEXANDER J. CAMPBELL.