US1724306A - Protection mechanism for looms - Google Patents

Description

Aug. 13, 1929.

J. PANSY PROTECTION MECHANISM Fon Looms I Filed March 192v 2 Sheets- Sheet 1 dztame s I Aug. 13, 1929. J. PANSY PROTECTION MECHANISM FOR LOOMS Fil'ed March 26, 1927 2 Sheets-Sheet 2- [Wen/or llosc ofi Pansy J 5 fltzorne .9 2

Patented Aug. 13, 1929.

UNETED STATES PATENT OFFICE.

JOSEPH IPANSY, OF CENTRAL FALLS,,RHODE ISLAND, ASSIGNOR TO GBO'MITON & KNOWLES LOOM WORKS, OI! WORGEFJTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

PROTECTION MECHANISM: FDR LOOMFS.

Application filed March 26, 192".

This invention relates to protector mechanism for looms and it the general object of the invention to provide means for tin-owing off the power and applying the brake before the lay is stopped abruptly by the hunter without lessening the time allowed for the flight of the shuttle.

The usual protector mechanism employs a rolling rod mounted on the lay and having at least one forwardly projecting dagger. Fingers secured to the rod engage the shuttle binders and when'the shuttle is properly honed the rod will roll to move the dagger out of the path of a hunter fixed to the loom frame. As generally employed the effect of the protection is to throw off the shipper handle and apply the brake at the same time that the dagger engages the hunter to stop the motion of the lay. With this arrangement it is found that in heavy or fast run ning looms the power is actually on when the dagger engages the hunter. The reason for this is that the lock depended upon to hold the shipper handle in running position acts something like a toggle lock in that the last part of the movement of the shipper handle merely locks the latter in position, the power having been put on :ompletely a short time prior to the end of the movement of the shipper handle. As a result of this when the handle is being knocked off it must he brought hack an ap neciahle distance to effect unlocking before it is able to throw off the power. During this short interval the drive for the loom is slightly tighter than normal and it is found that when the lay strikes the fired hunter the power still on.

It is an important feature of my present invention to provide means where )y the brake may he applied before the dagger engages the hunter without shortening the time allowed for the flight of the shuttle. I am aware that devices have been proposed heretofore for applying the brake before the dagger engages the hunter, but in each of these instances the mechanism is so operated as to shorten the time available for the passage of the shuttle. In the cycle of the pick the flight of the shuttle will ordinarily occupy the time lapsing hetween picking and protecti The speed at which a loom may he v his Serial No. 178,716.

parts of the loom so as to take full advantage of the time allowed the shuttle to pass through the shed. Any mechanism, therefore, which lessens the time allowed to the flight of the shuttle would cut down the speed of the loom.

It is a more detailed object of my invention to provide a pair of daggers each effective to stop the loom, one being the usual dagger which works with the hunter to cause the sudden stopping of the lay, and the other being an auxiliary dagger operative to throw off the brake and shipper handie prior to the operation of the main dagger. its set forth herein these daggers maintain a fixed angular relation and when the main dagger starts to move so as to clear its hunter the auxiliary dagger will also start to move, but because the latter is light it can clear its hunter in less time than the main dagger can clear its hunter. For this reason the auxiliary hunter, when not moving to clear its hunter, can set the brakes before the main dagger engages its hunter,

With these and other ohjects which will appear as the description proceeds, my id vention relates to the arrangements and combinations of parts hereinafter set forth, and more particularly pointed out in the claims.

In the dCCl1l1 Jtl-Ilylllg drawings, wherein a cmivenient embodiment of my invention. is shown,

Fig. l a top plan view of a portion of the loom having my improvements applied thereto,

Fig. 2 is a vertical section on line 2-2 of Fig. 1 and showing the parts in normal running position,

Fig. 3 is a fragment-a l view of a portion of Fig. 2 showing the shipper and brake handles in non-running position,

Figs. 4:, 5 and 6 are enlarged sections on line JP-4 of Fig. 1 showing the parts in different positions,

Fig. 7 is an enlarged horizontal section on line 7-7 of Fig. 2,

F 8 is a diagrammatic view showing the relation of the two daggers and the parts with which they cooperate to effect stopping ofthe looiri, and v I i 9 "letailed vertical section on line lid tion as applied to aloom having a center fillingstop motion and have applied my auxiliary parts to the rolling rod of the protector mechanism and the bar of the filling stop motion. In Figs. 1 and 2 I have indicated the loom frame having a breast beam 11 and a crank shaft 12. The crank shaft may be driven in any approved manner but I have shown herein a form of drive usual for silk looms, the same comprising a motor 18 having a pinion 14 which meshes with a gear 15. Said gear is provided with a grooved sleeve 16 to cooperate with the forked end of a shipper lever 17 pivoted as at 18 to a bracket 19 supported by the loom frame. A friction disk 20 is keyed to the shaft 12 and has a friction surface 21 to cooperate with a corresponding friction surface22 formed on the inner face of the gear 15. A shoulder 23 fastened to the crank shaft 12 limits endwise movement of the disk 20. y

The shipper lever 17 extends forwardly and is provided with an upstanding stud 24 which is received by an oblique cam slot 25 formed on the lower end of a shipper handle '26 pivoted to the loom frame as at 27. WVhen the shipper handle is in the position shown in F ig. 2 the cam slot and stud are so related as to move the gear 15 against the disk 20 and causeturning of crank shaft 12 by motor 13.

The brake motion includes a relatively heavy lever 27 pivoted as-at 28 to the rear part of the loom frame and being connected as at 29 by means of an adjustable connector 30 to a flexible friction band 31, the forward end of which is anchored to the loom frame as at 32. A heavy tension spring 33 is interposed between the lever 27 and a fixed lug 34 by means of an adjustable connector 35. A forwardly extending rod 36 is pivotallyconnected at the rear end thereof to the lever 27 at 37 while the forward end thereof is connected as at 38 to a lever 39 rotatable about the shipper shaft 27.- A brake handle 40 is secured to rocking bar 41 forming part of the center stop motion and said handle 40 is provided with two notches of different depths, both of which are proportioned to receive a roller 42 mounted on the lever 39. The high notch 43 receives said roller whilethe loom is running and tends to hold the rod 36 in rearward position thus lifting the flexible strap 31 off the brake wheel 44 which is fastened to the crank shaft 12. The low notch 45 receives the roller when the brake is to be applied.

The protector mechanism may be of the usual form and comprises a protector rod 46 pivotally mounted to the lay L and having protector fingers 47 one of which is shown in the drawings. Each finger cooperateswith a binder 48 the position of which is determined by shuttles and said rod46 is provided with two forwardly projecting rel.-

other end under the da er 49 ativcly heavy daggers 49 only one of which is shown in Fig. 1. A torsion spring 50 lics around the protector rod 46 and has one end extended under the lay as at 51 and the We and the effect of said spring is to raise the dagger.

The parts for cooperating with the heavy dagger 49 are shown in detail in Figs. 0 and 7, where it will be seen that a buntcr lever 52 is pivoted as at 53 to the underside of the breast beam 11. Said buntcr lcvcr has an inwardly projecting portion which lics opposite a shock absorber 54 which may be a pad of rubber and the outer end of said lever extends in front o'l' the brake handle 40 and a lug fastened with the shipper handle 26. Said buntcr lever is provided with a notch 56 as shown in Figs. 4, 5 and 6 and because of the work which must be done by said bunter lever, it must be of substantial proportions. The under side of the breast beam may be provided with a guide plate57 having a rcarwardly and upwardly inclined lower face 58 which may guide the dagger 49 toward. the notch 56 when a shuttle is properly boxed.

The rocking bar 41 is pivoted in bearings 0 on the under side of the hr ast beam and has a d(,)wnwardly extending oliset ($1 for the dagger 49. Said rocking bar cooporatcs with the filling stop motion, which is of the usual construction, and serves when rocked in a right hand direction as viewed in Figs. 2 and 4 to move the roller 42 from the high dwell 43 to the low dwell 45, thereby applying the brake 31.

The mechanism thus far dcscribcd is of common construction and as such forms no part of my present invention.

In carrying my improvements inlo cll'cct I provide an auxiliary dagger to be moved with the main dagger on the protector rod 46, and I further provide a buntcr mounted on the rocking bar 41, of the lilling stop motion and so arrange and proportion said parts that they will apply brake 31 before dagger 49 engages hunter lever 52. Accordingly, I secure to 'the protector rod 46 a holder made in two parts as shown in Fig. 9, screw 71 fastening the parts together and clamping them tightly on to the rod 46. A comparatively light dagger 72 is secured into said holder 70 and has a forwardly project ing dagger end 73 which is not so blunt as the corresponding end of l'lllf llltllll dagger 49. Furthermore, I provide a hunter 74 which is secured to the rocking bar -ll by means of set screw 75. Said buntcr has formed on the lower portion thereof a small notch 76 and that portion of the hunter lying above the notch extends rrarwardly almost in a straight line for a. short dis tance so as to engage the top of the auxiliary dagger when said bunter is cngagcril by the latter and is rolled thereby to discon- The notch 76 on the hunter nect the dagger and hunter. is not as deep as the notch 56 lever.

ln the operation of the loom the lay L moves haclnvardly and forwardly, the shut tle ti being picked when the lay is hall: way back or on so-called top center and arriving on one of the boxes approximately half a pick later. [is the shuttle is boned the main dagger 49 will. be depressed and as the lay advances the hunter lever will remain in the position shown in Fig. 7, being unengaged by the main dagger. The operation of the main dagger in moving clear of the hunter lever set forth diagrammatically in Fig. 8, where the dotted line 100 indicates the path followed by the point of the dagger 419 when the shuttle is properly boxed and wherein the full curve line 101 indicates the path followed by the dagger l9 when it is to engage the notch 56.

lVhen the lay has moved tori *ardly a sufticient distance for the main dagger -19 to rive at point 102 indicated in Fig. 8 and for the auxiliary dagger 72 to arrive at point 103, said daggers will begin to take one or the other of the courses indicated in full and dotted curved lines, 100, 101, 10 i and 105 in said figure. a

The upper solid curved line 10 1- indicates the path to be followed by the auxiliary dagger when the shuttle is improperly honed, whereas the lower dotted curved line 105 indicates the path to he followed when the shuttle is boxed properly. Because of the fact that both hunters are secured to the same rod full lines 101. and lO-Cl will he eoncentric with the center of the lay and the dotted lines 100 and 105 will he generated by two points which are a 'lixed distance apart and moving ilorwardly with tl e lay. lhcse curves in dotted lines will not be concentric with the center oil? the lay because they are produced by a combining oi. the rocking movement of the protector rod with the for ward movement ol? the lay.

The notch 76 is so shallow that it requires but a small movement on the part of the auxiliary dagger to clear it so that a comparatively short travel only beyond. the point 103 as shown in Fig. 8, is necessary to have the auxiliary lever clear the hunter Tel. The notch in the hunter lever 52, however, l'ieing larger, must be spaced farther from the point 102 in order to give the main dagger sullicient time to move downwardly to clear said notch. Because of the relation described in connection with Fig. 8 it is possible for the light dagger to start angular movement of the rocking bar 41 hetero the main dagger engages the hunter lever. .lhis result is accomplished without taking any time from the flight of the shuttle.

lironi foregoing it will be seen that l have ygirovided a very simple for throwing oil the power and applying the brake of a loom prior to stopping of the lay by the protector mechanism, and that this result is accomplished without lessening the time allowed for the flight of the shuttle.

l urthermore it will be seen that the main part of the protector mechanism is of uruurl construction so that the auxiliary devices may be added to looms already built.

Having thus described. my invention it will be apparent that changes and inodilications may be unule therein by those skilled in the art without departing from the spirit and scope of the invention, and I do not wish to be limited to the details herein disclosed but what I claim is:

1. In. stopping mechanism for a loom having a lay and a shuttle, shipper and. brake mechanism, a protector rod movably mounted on. the lay and controlled as to angular position relatively to the lay by the sluittle, a main dagger and an auxiliary dagger both secured to the protector rod and moving with the latter in, fixed angular position, a main hunter to cooperate with main dagger to elli'cct sudden stoppage of the loonn a rolling rod mounted on a fixed part of the loom and extending substantially parallel to the protectm' rod, an auxiliary hunter secured to the rolling rod to cooperate with the auxiliary dagger to operate the shipper and brake niechanism said auxiliary dagger cooperating with the auxiliary bimter to etfeet angular movement of the rolling rod on the forward inovcn'ieut ot the lay prior to the engagement of the main hunter and main dagger.

2. Il n stopping meeluniism for a loom having a lay and a shuttle, shipper and brake mechanism a yn'otector rod movably mounted on the lay and controlled as to angular position relatively to the lay by the shuttle, a main dagger and an auxiliary daggrn: both secured to the protector rod and moving with the latter in fixed angular position, a main b'l'lnter to cooperate with main dagger to cl'l'ect sudden stoppage ol the loom, a rolling rod mounlr-ul on a fixed part of the lOOll'l and extending substantially parallel. to the protector rod, an auxiliary hunter secured to the rolling rod to cooperate with the auxiliary (tagger to oper ate the shipper and brake mechanism. said auxiliary dagger coopm'ating with the auxiliary hunter to el'li'ect angular movement 01 the rolling rod on the ilorward movement oi? the lay prior to the engagement of the main hunter and main dagger, the main and auxiliary hunters each having a notch to receive the corresponding dagger, the notch in the main hunter being larger than the notch in the auxiliary hunter.

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