US1768510A - Loom - Google Patents

Description

June 24, 1936. 5 CQLDWELL 1,768,510

LOOM

Filed Oct. 10, 1928 Patented June 24, 1930 UNITED STATE JOHN s. coLnWELL, OFIALL RIVER, MASSACHUSETTS, Assrenon 'ro LENO I WEB GOMPANYQOF MASSACHUSETTS PATET oF lcr-i:

ELASTIC This improvement relates to looms and is particularly intended to provide a simple and reliable construction and arrangement by the use ofwhich the loom is automatically pre- '5 vented from continuing to weave, eitherafter.

' thefillingthreaded has broken or after the filling package in the shuttle has approached the point of exhaustion.

The present improvement resides in a. combination of a feeler mechanism with a weft fork mechanism in such a way that each independently, as occasion arises, acts to knock off the shipper lever or control lever to cause the stoppage of the loom. p

This and other features of the invention will be described in the following specification and will be defined in the claims hereto annexed. V In the accompanyingdrawing I have illus- 20. trated a simple and convenient form of mech lay toward the feeler the tip of the feeler anism for accomplishing the cessation of weaving by the stoppage of the loom through the controlof the associated feeler and weft fork mechanism.

trol or shipper leverand a knock off arm.

Fig. 2 is a front elevation' of the mechanism p corresponding portion of the weft hammer as shown in Fig. '1, I

Fig. 3 is an end view showingthat part of the mechanism directly associated with the weft hammer.

Fig. 4 is an enaelevtuon' partly in cross] section showing the feeler actuatedrock shaft through which the weft hammer is madeop;

erative upon the weft fork slide.

Fig. 5 is across section through the shuttle box and shuttle.

At thefront of the loom in the usual position is mounted the horizontal plate 1 having a slot 1 extended transversely of the loom and provided at its inner end with a notch or recess with which'the upwardly prO e'ctmg shipper or loom v control arm 2, engaged to keep it from loom-stoppingposition, -As1s,

well known to those skilled in the,art,;when the arm Q'is pushed out ofits engaging'not'ch or recess into the main portionof the slot it 1s automatically moved under the influence of 5.0- a spring or weighttowardthe' left-hand end Fig. 1 is a plan view o fthe assembled mechanism in association with the loom 0011-;

of the loom to stop the loom, eitherthrough the shipping of the driving belt from the driving pulley to the loose pulley or, in the case of'an electrically driven loom, thro;wing a clutch, or a switch to break the circuit.l These details are notillustrated as they are. well known in the art. 7

At theleft hand end of the'plate 1, directly j in line with a lateral opening or window through the side of the shuttle box and through the side of the shuttle contained. "therein, 1s mounteda reciprocatory feeler finger 4. The shuttle Tcarriesthe usual supply or filling bobbin? and, when correctly seated betweenthe movable swell Giand the opposite side wall 6 of the shuttle box mount ed on the lay, positions the base portionof the bobbin'which in this case is slotteddiametrically to receive the thin feeler finger l,

so that with each forward movement of the advancing lay, thereby moving a latch mounted on the weft fork slide outof the path of the will presently be described. v y 4,

The feeler is normally pressedrearwa'rd by a gravity actuated rock shaft and is mounted in bearings formed in two upstandinglugs 3 and 3 forming partof the feeler bracket 1 3 adj ustably secured tothe plate 1. At right angles to the feeler 4 and somewhat above the level thereof is mounted a rock shaft 30 which is carriedin upright bearing brackets 3"and 10?. Between the bearing bosses 3 and 3 the; feeler 4 is provided with ayertically grooved'collar engaged by a forked arm'31,

which is secured to the rock shaft by a suitable hub or collar so as to cause the shaft-'30 to rockwhen the feeler actuated arm 31 is moved forwardly by the advancing lay. I

bracket 10, the rock shaft is bent to "form At its inner end, beyond the"bearing an angular extension 14: to which is detach ably secured a eight block incline with; afinger 18? projecting rearwardly and up tion in a clockwise direction, as seen in Fig.

3, whereby the latch-actuatin end of the rock shaft is caused to lift the finger 1'3 and rock the latch 13 out of registry with the bunt 21, so that no movement of the weft fork holder 11' is produced.

On the other hand, when the filling is unwound sufficiently to'uncover the slot in the "fside of the bobbin 7 so as to allow the feeler ti'p'to enter therein, the actuation of the feeler does not occurand therefore the latch 13 remains in its normal position to be engaged by the member 21 of the weft hammer. This causes a forward movement of the weft fork holder 11, which is provided with a lateral depending boss 11 near its forward end arranged to engage the right hand end of the knock off lever 15 which is pivoted at 15 to the loom and whose other end is in position to press the lever 2 out of its retaining recess, thereby allowing the lever 2 to move to loom-stopping position. The operation of the weft fork is well known. 'Onthe rear end of the weft forkholder 11 is pivoted in an elongated slot or opening the usual weft fork 12 on a pivot pin 12 whose downwardly extending tines H; are in position to be engaged by the last shot M whenever the projection 20 of the weft hamof filling carried across the lay by the shut tlie. The for ward endof the weft fork has the usual hook 12 in registry with a projection 20 on the weft hammer 19, so that merengages the hook l2 fthe forward movement of the weft hammer causes the weft fork-holder 11 to move forward thereby actuating the 'knock off lever 15, as above described. So long as the last shot of filling from thesli'uttle remains unbroken, the weft fork @will' be tipped downwardly on the forward movement of the lay, thus tipping up the hook 12 out of registry with the projection 2001i the weft hammer. If the filling 5 5 yarn breaks, however, the weft fork is not actuated andtherefore the weft haimner'opertes bythe mechanism described to stop the loom. v f

It will therefore be seen that the weft fork mechanism'i's so combined with a feeler mechanism that not only does it act to stop. the loom when the filling yarn paid out from the shuttlebreaks, but it also acts to stop the loomibyits combined relation with the feeler device when the yarn on the filling package is sufiiciently near complete exhaustion to allow the feeler tip to remain active when the lay advances.

()bviously a similar mechanism for the right hand side of the loom will act in precisely the same way on alternate forward movements of the lay.

In the ordinary plain loom considerable time is lost and imperfect weaving is producedwhen for any reason a pick of filling is carried only part way through the shed formed by the warp threads. The continued operation of the loom after such an occurrence renders it necessary for the weaver, when this condition is observed by him, to remove the picks of filling in front of such partial pick- This prevents lost time and labor and insures more perfect weaving by affording automatic protection against continuance of weaving until the filling package is exhausted and leaves a partial pick of filling in the fabric, which has to be removed to avoid imperfections.

The rock shaft 30 serves as an actuator shaft for advancing or projecting the feeler toward the filling, this action being secured through the weighted arm 14, which tends to rock the downwardly projecting attached feeler arm 31 toward the advancing lay on which the filling carrying shuttle is supported. Furthermore, as the arm 14:, as best shown in Fig. 3, in its normal undisturbed position lies' with its toe or free end directly above the depressed rearward end of the latch 13, it serves when in such normal position to prevent accidental displacement of the latch which would carry it out of engaging position with the forwardly projecting portion 21 of the weft hammer, besides insuring the positive lowering of the latch into the path of the weft hammer. On the other hand, when the rock shaft 30 is reversely rotated by the filling induced movement of the feeler the arm 14: will positively engage the finger 13 forming part of the latch 13and will insure the movement of the rear end of the latch out of engagement po sition with the vibratory hammer 19, so that it will be seenthat the arm 14 has a two-way engagement with the latch which transmits, or fails to transmit, the forward movement of the hammer to the loom-stopping slide 11.

The above arrangement not only makes the device fool proof against accident, but it has the further advantage of maintaining the controlling mechanism under a constant and uniform pressure by gravity action instead of opposing a spring resistance, which is more or less variable anyway and which unduly increases in strength as the feeler is pressed back by the advancing fillingpackage.

What I claim is: j

1. In a loom-stop mechanism, the combination witha freely slidable shuttle-penetrating filling feeler arranged. in front of the filling containing shuttle, a gravity actuated rock shaft at the front of the loom connected with said feeler to normally project the feeler into the path of the advancing filling and.

itself to be reversely rocked by the fillinginduced movement of the feeler, a loom-stop motion embracing a weft fork, a supporting slide and an actuating vibratory hammer,

a latch mounted on said slide to be engaged by said hammer to actuate the slide to loomstopping position independently of the weft fork, said rock shaft being provided with an arm having a two-way actuating engagement with said latch to insure the movement of the latch into and out of the path of the vibratory hammer. g

2. In a loom-stop mechanism, the combination with a freely movable shuttle-penetrating filling feeler arranged in the path of the forwardly advancing filling, a gravity actuated, feeler-actuating rock shaft mounted at the front of the loom to normally project the feeler toward the advancing filling and itself reversely rocked by the feeler when moving forward under the push of the ad vancing filling, an arm securedto said rock shaft, a Weft stop mechanism embracing a weft fork itself, supporting slide and an actuating Vibratory hammer, a latch pivotally mounted on said slide forwardly of the weft fork to present its rear end in the path of said hammer, said latch being provided with a projecting finger, said arm on said rock shaft being disposed in one position to prevent themovementof said latchout of the pathof the weft hammer and when reversely rocked by filling-induced movement of the feeler to engage said finger and move the latch out of the path of said hammer.

In witness whereof, I have subscribed the above specification.

JOHN S. COLDWVELL.

Images