US597192A - Picker-check for looms - Google Patents

Description

(No Model) B. THAOKERAY. PIOKER 03501: FOR LOGMS.

No. 597,192. Patented Jan. 11,1898.

WITNESSEE.

. against the swells.

UNITED STATES PATENT @rrrcs.

RICHARD THACKERAY, OF FALL RIVER, MASSACHUSETTS.

PICKIER-CHECK FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 597,192, dated January 11, 1898.

Application filed February 9,1897. Serial No. 622,600. (No model.)

To ctZZ whom it may concern.-

Be it known that I, RICHARD THAOKERAY, of Fall River, in the county of Bristol and State of Massachusetts, have invented a new and useful Improvement in Looms; and I hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification.

This invention has reference to an improvement in the shuttle-throwing mechanism of a loom.

The object of the invention is to control the throwing and the arresting of the shuttle more perfectly and increase the speed of the loom.

Another object of the invention is to replace the leather straps used to cushion the pickerstick by more durable mechanical devices acting on the rocker of the picker-stick.

In power-looms as heretofore constructed the shuttle-boxes are provided with swells. Arms extend from the protector-rod and bear Springs acting on the prorector-rod exert uniform yielding pressureon the swells. When a shuttle enters the shuttle-box, the swell is moved outward and moves the arm in contact with the swell, so as to partially rotate the protector-rod. The friction of the shuttle on the swell retards the velocity of the shuttle which strikes the picker-stick and carries the same to the outer fer-straps.

limit, where the stick is usually arrested by means of leather straps or cushions.

In the looms above described the springpressure on the swells is uniform. It is maintained uniform on the ingoing and outgoing of the shuttle and must be such pressure that while the swell retards the velocity of the shuttle it does not arrest the same, but allows the shuttle to pass by the swell and carry the picker-stick to its outer limit, where the stick is arrested by leather cushions or buf- In such looms the shuttle is liable to rebound and is not held in contact with the describe hereinafter mechanism acting on the rocker of the picker-stick and the protectorrod by which the shuttle as it enters the shuttle-box is retarded by the swell, and as the shuttle moves with the picker-stick the pressure on the swell is gradually increased to retard the shuttle, while the resistance of the picker-stick is also gradually increased until the momentum of the shuttle is balanced by the resistance and the shuttle is firmly locked or held in the desired position.

hen the shuttle is thrown, the pickerstick moves the shuttle against the graduallydiminishing pressure on the swell and sends it through the shed into the opposite shuttlebox.

As far as I know, I am the first to so construct a loom that the shuttle is received in the shuttle-box and the momentum arrested by a gradually-increasin g frictional resistance and a gradually-increasing resistance of the picker-stick. I. do not, therefore, wish to confine myself to the specific construction herein shown and described.

Figure 1 is a transverse sectional view of so much of a loom as is required to-illustrate the invention. Fig. 2 is an enlarged side View of the foot-support of the picker-stick and the lever cooperating with the rocker of the picker-stick. Fig. 3 is a sectional view, on an enlarged scale, of the lay, sh owing the arm connected with the protector-rod and bearing on the swell.

Similar numerals of reference indicate corresponding parts in all the figures.

In the drawings, 4 4 indicate the end frames of the loom; 5, the rock-shaft, from which the arms 6 6 extend which support the lay 7; 8 8,

tector-rod; 11 11, the arms secured to the protector-rod and bearing on the swells 9; 12 12, two hooked-levers projecting from the rear of the protector-rod to which the wires or straps 13 are secured. The lower ends of these wires or straps are secured to the upper ends ofthe coiled springs 14.

To the ends of the rock-shaft 5 the pickerstick shoes 15 15, provided with the horns 16,

are secured. The picker stick rocker 17,

which is of the usual construction, rests on and rocks on the shoe 15. The picker-stick rocker is provided with the loop 18, the

the shuttle-boxes; 9 9, the swells; 10, the pro shanks 19 of whichbear against the horns 16. The loop 18 is connected by the wire strap 20 with the floor-spring '21. The picker-stick 22 is secured to the'pickenstick rocker in the is exerted, on the coiled spring l t and the least strain on the floor-spring 21'on the lefthand side of the loom. The strain thus exerted on the coiled spring 14 acts through the pro.- teetor-rod on the swell to bind the shuttle and through the lever 24: on the end of the pickerstick rocker.

On the righthand side of Fig. 1 the strains on the coiled spring 14: and the floor-spring 21 are practically balanced. Thepress ure on the swell 9 of that side is the minimum pressure.v

When the shuttle in the left-hand shuttlebox is moved by the picker-stick, the toe end 17 of the rocker descends, the bifurcated end of the lever 24 follows the toe, and the short end 25 of the lever rises and diminishes the tension on the springle, thereby diminishing the strain on the protector-rod and the pressure on the swell 9. the frictional resistance decreases untilthe final blow is given to send the shuttle across the shed. As the shuttle enters the shuttlebox on the right-hand side of the loom the pressure on the swell is sufficient to retard the shuttle by the friction on the swell. When the shuttle strikes the picker-stick and moves the upper end outward, the bifurcated end of the lever 24 is moved upward by the toe of the rocker 17, the tension on the spring 14 increases rapidly, and with it the pressure on the swell, while the momentum of the shuttle decreases until it is arrested. The shuttle at this point is firmly held by the swell. It is in contact with the picker-stick and ready for the next throw. By thus controlling the picker-stick and shuttle and maintaining the contact between the same I find I can materially increase the speed of the loom and run the loom at higher speed with less jar and wear than when the loom is provided with the usual leather straps and cushions and run at lower speed.

The only parts added to the loom are the levers 24:, and these can be applied to any form of loom at small cost. The constant renewal of the leather straps is saved and the picker-stick is not liable to be twisted and broken by the blow of the shuttle, as it now moves straight and fair, while the straps which yielded on one side while the other side was As the shuttle proceeds fixed supported the stick more on one side than the other and caused it to twist.

I have chosen to show a constructionin which the swells are operated upon by the arms on the protector-rod, but it is evident that the central portion of the protector-rod, 1

between the hooked levers 12 12, may be cut out and each shuttle-box swell operated independent of the other and independent of the protector-rod without materially changing the operation of the loom.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent I Y 1. In a loom, the combination of the followinginstrumentalities,viz: alay, the shut 1 tle-boxes at the opposite ends of thelay, swells in the shuttle-boxesa protector-rod, provided with arms, bearing on the swells,

the picker-sticks, the rocker-supports for the picker-sticks, the springs connected with the same, and mechanism, substantially as described, comprising a coiled spring connecting each picker-stick with the protector-rod,

tie-box, a picker-stick and the rocking support for the foot of the same, of a shaft supported on the lay, an arm secured to said shaft atone end, the other end of the arm bearing on the swell, a lever pivotally supported on'the supporting-arm of the lay, and connections between the said lever and the picker-stick and between said lever and the arm bearing on the swell, having a coiled spring interposed in such connection, wherebythe pressure on the swell is increased as the picker-stick is moved outward to hold the shuttle against rebound and is diminished as the picker-stick and shuttle move inward to throw the shuttle, as described.

3. In a loom, the combination with the lay with its supporting-arms, the shuttle-boxes, on the lay, the swells connected with the shuttle-boxes, and the pickersticks with their usual connections and supports, of two arms pivotally supported on the lay and bearing on the swells, two levers pivotally supported on the arms of the lay, connections between the levers and the arms bearing on the swells, comprisinga coiled spring in each conneetion, and connections between the said levers and the picker-sticks; whereby the velocity of the shuttle is retarded by the swell of the shuttle-box and arrested by the increasing pressure on the swell and increasing resistance of the picker-stick, and its outward movement is facilitated by the gradually-decreasing pressure on the swell, as described.

4. In a loom, the combination with the lay 7, the supporting- arms 6, 6, the shuttle- boxes 8, 8, the swells 9, 9, the protector-rod 10 provided with the arms 11, 11, bearing on the swells, the hooked levers 12, 12, projecting from the protector-rod, the floorsprings 21, 21, the picker- sticks 22, 22, the operatingstraps 23 and the rocking supports 17 of the picker sticks connected with the floor-springs, of the levers 24- pivotally supported on the arms 6, 6, the bifurcated ends 24 hearing on the toe 17 the notched arms 25 25 of the le- Vers 24, 24:, the coiled springs 14:, 14:, and the straps 13, 13, and 26, 26,0onnecting the springs IQ with the levers Z and the levers 12 on the protector mod; whereby the shuttle is errested by the increasing pressure on the swell and increasing resistance on the picker-stick, as described.

In witness whereof I have hereunto set my I 5 hand.

RICHARD THAOKERAY. Witnesses:

JOSEPH A. MILLER, J12, M. F. BLIGH.

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