US281476A - Island - Google Patents

Description

' 2 Sheets-Sheet 1.

W. EVANS. Q Q

LQOM.

Pate

(No Model.)

nted July 17, 1883.

N. PETERS. Pholn-L ihugrapher. Wallmflnn. n. c

2 t e e. h S S t e e h S 2 S N A v E J m. d 0 M 0 N Patented July 17, 1883.

INV ENTOR.

WITNESSES| a G F N4 PETERS. Hum-whom. wnhin wn. DJ;

UNIT-En STATES.

PATENT OFFIcE.

WILLIAM EVANS, or PROVIDENCE, RHODE ISLAND.

LOOM.

sPncI'FIcA'rIoN formin part of Letters Patent mfasn rre, dated July 17,1883.

- Application filed September I, 1881. (No model.)

ings, forming a part of the same, is a full, clear,

and. exact description thereof.

My invention relates to means for setting the pattern card or chain of a loomwhen the filling-thread breaks or runs out, so that when theloom is started again that section of thev pattern which governed that shed of the warpthreads in which the filling-thread broke or ran out will be presented to the mechanism which produces the shed of the warp, there by insuring the proper continuation of the design being woven.

ism which automatically produces this result,

out in the claims.

breaks or runs out, for, although the stop-motion may act promptly, the momentum ac quired by the moving parts of the loom is sufficient to carry the pattern one or more sections ahead before the loom stops, the number of sections thus moved varying in different looms and in the same loom at different times. t

In the majority of looms as heretofore condefective pick is found, thereby causing concreasing the cost' of weaving. Means have been devised heretofore for preventing the continued intermittent forward revolution of the card-cylinder of a loom after the stop-moloom stops.

during subsequent beats.

- cylinder and employing a single-pick card.

My invention consists in improved mechan structed the pattern has been set by hand by I turning it back beyond the section sought and then working the loomby hand until that: shed of the warp is produced in which the a the vibrating arms B, are engaged successively siderable lossof time and consequently in- 1" tionoperates, and for reversing said cylinderone'flat at each of its outward beats until the My invention is an improvement 5 upon such means, in that by it the card-cyl- K inder is reversed the proper number of Hats during one outward beat, and is not disturbed Y My improvement is applicable to all fancylooms which employ a vibrating or non-vibrating card-cylinder or an intermittingly or continuously revolving pattern chain cyliu der.

Referring to the drawings, Figure 1 represents in plan my improved mechanism attached to a portion of aloom having a vibrating card- Figs. 2, 3, 4, and 5 show the same in side elevation and illustrate the mode of operation. Fig. 6 represents in side elevation a portion of aloom as usually constructed, without my improvement. Fig. 7 shows certain details of construction. Fig. 8 represents in plan a portion of a-loom provided with an ordinary form of stop-motion. Fig. 9 showsin side elevation a portion of a loom provided with a vibrating card-cylinder and employing a twopick card. Fig. 10 represents in side elevation a portion of a loom employing a continuas will hereinafter be described, and. pointed 1 ously or an intermittingly revolving patternchain cylinder supported in fixed or station- As is well known to persons familiar with the art of weaving, it. is necessary to set the pattern card or chain when the filling-thread 1 ary bearings.

As shown in Figs. 1, 2, 3, 4t, 5, 6, and 7, A is the frame of the loom. B is the intermittingly-revolving card-cylinder, which is mounted on a pair of arms, one of which, B, is shown in the drawings. These arms are se cured to a rock-shaft, O, which is j ournaled in the frame A, and are vibrated by a crank, D, secured to the driving-shaft D of the loom, through a pitman, (l, lever d, link (1 and arm (1*, secured to the rock-shaft O, as shown in Fig. 4. At one end and upon its edges the card-cylinder B is provided. with projecting ribs 12, which, as the cylinder moves outwardly or away from the loom-frame under control of 0 by a stationary pawl, E, pivoted to the frame A and held in position to engage the cylinder by a spring, 0. The engagement of the pawl E with a rib 1) partially rotates the cylinder and successively brings each of the series of 5 cards F which compose the pattern into position before the needles F, Fig. -1.

The customary means by which the' patterncard has been reversed by hand heretofore are shown in Fig. 6. The mechanism consists of a lever, G,pivoted' to the arm B, and having a strap. or cord, g depending from its outer end, and a pawl, G, pivoted to the inner end of said lever and normally held out of engagement with the ribs 1) 011 the card-cylinder by a spring, When the pattern is to be reversed, the strap 9 is pulled downward for the purpose of bringing the pawl G into engagement with a rib 1), thereby turning back the cylinder one flat for each pull upon the earlier part of the backward movement of the strap.

Referring to my improved mechanism for automatically reversing and setting the pattern-card, it will be seen that upon one end of the card-cylinder B is secured a pinion, h, which meshes with a gear, H, -Figs.'1 and 7, mounted upon a shaft journaled in a bracket secured to the arm 13. At the opposite end of this shaft is secured a sprocket or ratchet wheel, J, which vibrates with the arms B 5 but instead of the wheel J, constructed as shown, I may substitute a toothed wheel or other equivalent device. Overlying the wheel J is a pawl, K, pivoted to a bracket on the frame A, and provided with an arm, In, which overlies a lever, L, pivoted to a bracket on the loomframe.

wire, I, and its inner end is bent and engages the pawlE on the under side. The normal positions of the pawl K and lever L are as shown in Fig. 2, which positions are maintained during the proper running of the loom by a spring, e. This spring depresses the free end of the pawl E, and, owing to the engagement of this pawl with, the bent end of the lever L, the outer end of said lever is elevated,

and since the arm is overlies and engages said lever, the pawl K will be raised and held out vate the inner end of the lever L, thereby raising the pawl E out of a position to engage the cylinder B, and allowing the spring to lower the pawl K into a position to engage the wheel J, as shown in Fig. 3. When the Vibrating arms B move outward, as they will do, owing to the momentum of the moving parts of the loom, the tooth of the pawl K will engage the wheel J and turn it one-fourth of arevolution.

As shown in Fig. 7, the gear His twice the size of the pinion h,- therefore the card-cylin der will be turned one-half a revolution, or

two flats, backward. The object of reversing -the card-cylinder two flats will now be explained. The outward and inward movements of the card-cylinder take place during" the respective backward and forward move ments of the lay of the loom, the movements of said cylinder in most looms being slightly The outer end of this lever is con nected to the stop-motion of the loom by a:

put into the previous Warp-shed, which was governed by the previous card.

The shed of the warp is formed during the lay. At such time the card-cylinder is moving outward and is turned one flat forward, the pattern thereby being advanced one card. The shuttle passes through the shed during the latter part of the backward movement of the lay. Let it be supposed that the shuttle has put in a perfect pick, and that the lay is moving forward to beat it up. The eard-cyliir der will then be moving inward to present the card (say No. 1 of the pattern) which is to govern the shed of the warp for thenext pick, the said card having been turned into position byth'e last outward beat of the cylinder, and before the shuttle put in the perfect pic};- above mentioned. Card No. 1 having performed its ofiice, the cylinder will move out ward and card No. 2 will be turned into p0 sition, the lay will move backward, and that warp-shed which was governed by card No. 1 will be formed. Suppose the shuttle now moves toward that end of the loom where the weft-fork is located, and leaves a defective pick in this shed, and the lay moves forward to beat it up. The pick being defective, the stop-motion will be thrown into operation; but before it can raise the pawl E the cylinder will have swung outward, been engaged by said pawl, and i been turned a flat forward, thereby bringing card No. 3 into position. Since the defective pick was put into that shed of the warpv governed by card N o. 1, the cylinder must be turned back two flats and the pattern be reversed two cards in order that card N o. 1 may be presented to the needles, and thereby cause a shed of the warp to be made where the defective pick is. This reversal will take place when the cylinder next moves outward,which it will do immediately, owing to the momentum of the moving parts of the loom. This reversal of two flats will benecessary, whether the loom is supplied with a stop-motion at one end, in the center, or at both ends. One case arises, however, when three flats are required to be turned, and that is when the stop-motion is located at one end of the loom only, and the shuttle leaves a defective pick when going toward that side of the loom having no stop-motion. In such a case, however, a glance at the fabric shows the weaver that the reversal of a third flat is necessary,-which he can accomplish immediately by pulling the strap 9, Fig. 6, and thereby working the hand mechanism for reversing the cards, which is preferably left 011 the loom for use in such a case.

Since the arms 13 are liable to vibrate several times after the stop-motion operates, it is desirable that means be provided for preventment with the teeth of the wheel J. The member m of .the notched face constitutes the point of the hook M, and this member is externally engaged, and the free end of the hookis swung outward by each tooth of the wheel J as it normally revolves in the direction of the arrow shown in Fig. 2. When the wheel J is moved in an opposite direction by the pawl K, however, as indicated by the arrow in Fig. 3, thattooth of the wheelJ which is in contact with thenotched face of the hook Mwill act on the member m, will raise the hook and allow the succeeding tooth of the wheel J to engage the inner face of the hook-point m and elevate the hook to the position shown in Figs. 4 and 5. The head or upper end of the hook M'is fiat and extended, as shown in the several figures. WVhen, therefore, the arms B, carrying the cylinder'B and wheel J, move toward the loomframe, the tooth of the pawl K will rideupon the head of the hook M, as shown-in Fig. 5, and will be prevented fromv descending so as to engage another tooth of the wheel J, and thereby further reverse the pattern. As ordinarily arranged, a spring, 0, Fig. 1, bears upon one side of the cylinder B with sufficient force to retain it in position after it has been turned. The spring n'is weaker than the spring 0, so that when the parts are in the positions shown in Fig. 5 the force of the spring 0 is sufficient to prevent the spring n from causing the hook M to rotate the ratchetwheel J, and thereby advance the pattern. When the card-cylinder is reversed and set, therefore, the spring 0 holds the pattern in its proper position until the pawl E engages the cylinder and turns the pattern forward. When the loom is started, the lever L, pawl K, and pawl E will be'returned to their normal positions by the adjustment of the stop-motion, which will raise the rod or wire Z, thereby elevating the outer ends of the lever L and pawl K and allowing the pawl E to be lowered for engagement with the cylinder B by the spring 6. Until the card-cylinder is partially rotated by its engagement with the pawl E the hook M will remain in the position shown in Fig. 5; but when the cylinder is moved by the pawl E the hook M will be caused to assume the position shown in Fig. 2 by the action of the spring 12. A

In the loom as above described the cardcylinder has four flats or sides and the wheel J has eight teeth; but if the cylinder has more or less than four sides the number of teeth in the wheel can be varied so as to produce the requisite rotation of the cylinder, or the gear H may be proportioned tothe pinion h, so as to secure the desired result.

In looms employing pattern-cards which are arranged for two picks each, the card-cylinder is vibrated twice before beingturned, and itis usually supplied witha ratchet which is worked by a pawl vibrating to engage said ratchet every two picks. A portion of-a loom of this variety and of well-known construction, which is provided with a card-cylinder, B, of eight sides, is shown in Fig. 9. The cylinder is 'ournaled in arms B which vibrate ever 2 y pick, and said cylinder is turned one flat forward for each two picks by the vibrating pawl E, which engages a ratchet, P, attached to the cylinder. The pawl K is pivoted to the frame of the loom, and is held out of engagement with the ratchet-wheelJ by an arm, k, attached to the lever L. When the stop-motion operates, that end of the lever L towhich the wire l is attached is depressed and its opposite end is raised, thereby elevating the pawl Eby engagement with a pin, r, secured to the pawl and overlying said lever, and allowing the pawl K to swing into engagement with the wheel J. The arm N is pivoted to one of the arms B, and said arm N and its hook M are returned to and are held in normal positions by a spring or a weight, B. The gear H and pinion h, hereinbefore described, are dispensed with, and the wheel J is attached to the cardcylinder. The operation of all the parts is substantially as hereinbefore described, with the exception that the pawl K turns the cylinder but one flat. In looms of this character only one flat needs to be turned backward, because the pattern-card advances only one section for two picks, and the cylinder will be only one flat ahead when the stop-niotionop erates.

An adaptation of my improved mechanism to a loom employing a pattern-chain passing over a continuously or intermittingly revolving cylinder supported in fixed or stationary bearings is shown in Fig. 10. As shown in said figure, the wheel J is attached to the chain-cylinder or its shaft and the arm N is jonrnaled to swing on said shaft. The lever L is of the be1l-crank form, and is pivoted at its angle to the frame of the loom. The rear end of the pawl Kis pivoted to alever which is pivoted at its lower end to the frame of the loom, and is connected by a link'at its upper end to the usual vibrating arm, which recipro cates the sliding bar operating the hooked harness-jacks. Under normal conditions thepawl K is held out of engagement with the wheel J by an arm or pin, k, projecting from the pawl and riding on the lever L. When that end of the lever L to which the wire l is attached is elevated by the action of the stop-motion, the opposite end of the lever will be depressed, and the pawl K will be brought into engagement with the wheel J, and will reverse the IIO pattel'mcylinder when the lever to which the said pawl is pivoted is moved rearward. The action of the hook M and its associated parts will be the same as hereinbefore described. In this variety of looms it is desirable that the forward rotation of the cylinder should be stopped as soon as possible when the stopmotion operates. This may be done by cans?- ing the stop-motion to unship the frictionclutch which drives said cylinder, but is preferably accomplished by a hook, S, which is normally held out of engagement with the wheel J by a pin projecting laterally from the upper end of said hook and riding upon. the lever L. Vhen this lever is tilted by the stop-motion, the hook S swings forward and engages one of the teeth of the wheel J and stops the revolution of the cylinder. It will be observed that a second hook, S, is located a little below the hook S. The object of the hook S is to hold the cylinder after it has been reversed by the pawl K, which will turn the cylinder backward in the majority of cases, so that a tooth of the wheel J will be a little below thepoint of the hook S. The hook S may be omitted, however, and the hook S be made to engage teeth formed on the periphery of one of the heads of the wheel J and properly spaced.

\Vhat I claim, and desire to secure by Letters Patent, is

1. The combination, with a stop-motion, a

pattern card or chain cylinder, and means for I vented from further action until the stop-mosupporting and means for actuating said cy1in-' der, of mechanism, substantially as described, 5 whereby, when the stop-motion operates, the forward rotary motion of said cylinder is arrested, the cylinder is reversed or turned back, and the reversing mechanism is pre- 40 tion again operates, substantially as set forth.

2. The combination, with a stop-motion, a pattern card or chain cylinder, and means for supporting and means for actuating said cylinder, of the wheel J, means for connecting said wheel with the cylinder, the pawl K, and lever L, substantially as and for the purposes specified.

3. The combination, with a stop-motion, a pattern card or chain cylinder, and means for supporting and means for actuating said cylinder, of the lever L, pawl K, wheel J, means for connecting said wheel with the cylinder, and the hook M, substantially as and for the purposes specified.

4. The combination, with a stop-motion, a

pattern card or chain cylinder, and means for supporting and means for actuating said cylinder, of the lever L, pawl K, wheel J gear H,

pinion h, and hook M, substantially as and for the purposes specified.

\VM. EVANS.

Vitnesses:

EDsoN SALISBURY Jones, GEORGE G. BELL.

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