US994820A - Center-fork stop-motion for looms. - Google Patents

Description

E. 061th.

CENTER PORK STOP MOTION FOR LOOMS.

APPLIOATION FILED JAN.31, 1911.

29 Patented June 13; 1911.

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HENRY (365E1 1, OF WEST WARREN, MASSACHUSETTS, ASSIGNOR- TO DRAPER COMPANY, OF HOPEDALE, MASSACHUSETTS, A-CORPOB-ATION OF MAINE.

CENTER-FGRK STOP-MOTION FOR LOOIVIS.

To all whom it may concern:

Be it known that I, HENRY core, a citizen of the United States, and resident of est l/Varren, county of iVorcester, State of Massachusetts, have invented an Improvement in Center-Fork Stop-Motions for Looms, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing re 'nresentinglike parts.

This invention has for its object the production of a simple and eflicient center-fork stop-motion for looms, whereby I obviate certain objectionable features of operation now found to occur at times in center-fork looms. In such looms it is well known that when the filling is properly laid and is under the proper tension the center-fork is held thereby in such position that no change in the operation of the loom, such as stoppage, or replenishment of filling, will be effected, but if the filling fails the fork will be abnormally positioned and the desired change in the operation of the loom is effected automatically. In the practical operation of such a loom the first pick of filling laid subsequent to loom stoppage will often be too slack to properly support the fork in its inoperative position and as a result the loom is stopped again unnecessarily, or if the loom is provided with filling replenishing mechanism asecond and wholly unnecessary actuation of such mechanism is effected.

My present invent-ion is designed to prevent the unnecessary change in the operation of the loom resulting from slack filling laid on the pick subsequent to the operation of the filling-detecting instrumentality due to filling absence.

Herein I have shown my invention as applied to a center-fork loom arranged to be stopped automatically only when the fork is abnormally positioned by the absence of filling, and the novel features of my invention will be fully described in the subjoined specification and particularly pointed out in the following claims.

Figure l is a top plan view of a sufficient portion of a center-fork loom, with one embodiment of my present invention applied thereto, the parts being shown in readiness to cause stoppage of the loom upon detection of filling absence by the fork; Fig. 2 is a transverse section thereof on the line 22, Fig. 1, looking toward the left; Fig. 3 is a Specification of Letters Patent.

Application filed January 31, 1911.

Patented June 13, 1911.

Serial No. 605,688.

plan view of the intermittingly rotated actuator for the knock-off lever of the shipper;

Fig. 4 is a horizontal sectional detail, on the line l l, Fig. 2, of the means for effecting step by step rotative movement of said actuator.

The breastbeam 1 having a notched hold ing-plate 2 for the shipper 3, the knock-off lever at fulcrumed at 5 beneath the breastbeam and having an extension or tail, 6, see Fig. 1; and the lay 7 having a transverse slot 8 in the raceway for the entrance of the tines of the center-fork, may be and are all in general of substantially well known construction; except that ordinarily the knockoff lever is fulcrumed on the top of the breast-beam.

The center-fork 9 is of a well known type, carried by the lay at or near its center so as to work among the warp threads at the mid die of the sheet of warp, the fork acting to detect filling absence during the first part of the forward beat of the lay just after the shuttle has passed it in its flight in either direction through the shed.

An arm 10 on the fulcrum shaft 11 of the fork is connected by a link 12 with a rocker-arm 13 fast on a rockshaft 1st mounted on the lay, said rock-shaft having attached to it a bent arm or follower 15 which is caused by a spring 16, Fig. 2, to travel along a cam 17 adjustably mounted on a sta-' tionary bracket 18. hen the lay moves forward the follower 15 travels along the cam and the fork 9 swings down to engage and be held up by the intact filling when the latter is properly taut, but if the filling is too slack, or is absent, the fork descends to abnormal position in the transverse slot or recess 8.

So far this mechanism is substantially the same as shown in United States Patent No. 952,637 granted March 22, 1910 to A. El Rhoadcs.

Herein I have attached a bracket 19 t0 the lay near and below the fork, and a dagger 20 is fulcrumed at 21 on the bracket, the short, rearward extension 22 of said dagger being connected by a link 23 with a crank-arm 24 on the fork fulcrum-shaft 11, whereby abnormal movement of the fork will lift the front end of the dagger to operative position. As shown in Fig. 1 the front end of the dagger is turned laterally, at 25, for a purpose to be described. iVhenever the fork detects presence of filling and is thereby prevented from assuming its abnormal position the dagger will be maintained inoperative.

Upon a fixed stud 26 depending from the breast-beam I mount rotatably an actuator for the knock-off lever, said actuator being herein shown as a disk 27 having a series of peripheral cam lugs 28, three being herein shown, equi-distant from each other, and the underside of the disk is provided with a ratchet 29, shown in Figs. 1 and at as having six teeth. The actuator is so positioned that when the shipper 3 is in its holding notch, in running position, the tail 6 of the knock-off lever will lie in the path of the cam lugs 28 when the disk 27 is rotated. The teeth of the ratchet 29 are so arranged with relation to the operating or cam lugs 28 that every advance of the ratchet one tooth will position said lugs either as shown in Fig. 1, or at points half way between such position.-

Intermittent rotation of the actuator is effected by a spring-pressed pawl 30 cooperating with the ratchet and mounted on a pawl-carrier 31 fulcrumed on the stud 26 beneath the ratchet, a spring 32 effecting the return stroke of the pawl-carrier and normally holding the latter against a fixed stop 33. The free end of the pawl-carrier has a depending lug 34 which is in the path of the laterally turned end 25 of the dagger 20 when the latter is operatively positioned on the forward beat of the lay, and when the dagger end 25 engages the lug 34: the pawlcarrier is swung forward and the actuator is rotated or advanced one step on its pivot 26.

If the parts are in the position shown in Figs. 1 and 2, and absence of filling is cletect-ed by the fork 9, the dagger 20 will be operatively positioned and when the disk 27 is turned one-sixth of a revolution, as described, the cam lug 28 adjacent the tail 6, Fig. 1, will act upon said tail to rock the knock-0E lever 4t and thereby release the shipper, the turning movement of the disk carrying the active cam lug far enough, in the direction of arrow 35, Fig. 1, to clear the tail and permit the knock-off lever to be returned to the position shown in Fig. 1 when the shipper is again moved to running position. Let it be supposed that after such stoppage of the loom the filling fault is corrected and the loom is started. The first pick of the shuttle after the loom is started is apt to be so slack that the fork 9 will not be held up. Consequently the dagger 20 will again be operatively positioned, the pawl-carrier 31 will be engaged and again operated, and the cam disk 27 will be advanced another step, such advance only moving the lugs 28 ahead to the position shown in Fig. 1, without moving the knock-01f lever, but ready to effect such movement. Consequently the loom will continue to run, as it should, for the slackness of the first pick of filling when the loom is started is not objectionable, as it will be beaten into the cloth when the lay completes its forward movement, and subsequent picks will be laid with requisite tension to hold up the fork at the time of its detecting action. The intermittent movement of the actuator for the knock-oft lever is affected by the pawl and ratchet, as will be manifest, and the latter parts are operated by the dagger when it is operatively positioned.

It will be noted that when the actuator is operatively positioned the efiective action thereof is efiected by the first engagement of the pawl-carrier, and the dagger, and the following movement of said actuator by or through the dagger (operatively positioned by slack filling) only serves to re-set such actuator in readiness to act the next time the dagger is operatively positioned. Thus the operative or effective action of said actuator alternates with the re-setting thereof in readiness to act, and improper stoppage of the loom is obviated. If by chance the filling should be laid properly taut on the first pick after loom stoppage there would be no immediate re-setting of the actuator, but such re-setting would be effected upon detection of filling absence, and the operation of the knock-off lever would be accomplished on the next pick, so that in such case the stoppage of the loom would be delayed only one pick.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a loom, a center filling-detecting instrumentality operative on every pick to detect presence or absence of filling, a dagger operatively positioned by abnormal action of said instrumentality, and mechanism to effect a change in the operation of the loom when filling absence is detected, said mechanism including an intermittingly rotatable actuator having a plurality of cam lugs, combined with means to cooperate with the dagger when operatively positioned and effeet a partial rotation of the actuator, to cause a cam lug thereof to operate and there by effect the change in the operation of the loom, a second operative positioning of the dagger thereafter, due to slack filling, effecting another partial rotation of the actuator to set the next cam lug in position to operate.

2. In a loom, a center filling-detecting instrumentality operative on every pick to detect presence or absence of filling, a dagger operatively positioned by each abnormal action of said instrumentality, and mechanism to effect a change in the operation of the loom when filling absence is detected, said mechanism including an intermittingly movable actuator, combined with means to cooperate with the operatively positioned dagger and effect movement of the actuator to thereby cause a change in the operation of the loom, asecond operative positioning of the dagger by abnormal action of said filling-detecting instrumentality due to slack filling after such change acting through said means to re-set the actuator in readiness to operate.

3. In a loom, a center filling-detecting instrumentality operative on every pick to detect presence or absence of filling, a dagger operatively positioned by abnormal act-ion of said instrumentality, and mechanism to efiect a change in the operation of the loom when filling absence is detected, said mechanism including an intermitting ly rotatable actuator having a plurality of peripheral operating portions, combined with a pawl and ratchet to cooperate with the operatively positioned dagger and effect a partial rotation of the actuator, to render an operating portion thereof active and thereby cause a change in the operation of the loom, a sec ond operation of the pawl and ratchet by the dagger, due to slack filling after such change in the operation of the loom, rotating the actuator to move its next operating portion into position for action.

4. In a loom, a shipper, a knock-off lever therefor, an actuator for said lever, a center filling-detecting instrumentality operative on every pick to detect presence or absence of filling, and means controlled by said instrumentality to operate said actuator when filling absence is detected and effect loom stoppage, said means operating a second time to reset the actuator for the knock-off lever by or through a second abnormal action of said fillingdetecting instrumentality due to slack filling on the first beat-up when the loom is again started.

5. In a loom, a center filling-detecting instrumentality operative on every pick to detect presence or absence of filling, mechanism controlled by said instrumentality to effect a change in the operation of the loom when absence of filling is detected, said mechanism including an actuator caused to act by such operation of the filling-detecting instrumentality when filling absence is detected, a second and similar abnormal operation of said instrumentality due to slack filling after the change in the operation of the loom has been effected resetting the actuator in readiness to act on the next detection of filling absence.

6. I11 a loom, a shipper, a knock-off lever therefor having a tail, a rotatable actuator having peripheral cam lugs, adapted to cooperate with the tail andswing the lever to release the shipper, a center filling-detecting instrumentality operative on every pick to detect presence or absence of filling, and means controlled by said instrumentality to rotate the actuator and effect cooperation of a cam lug thereof with the lever-tail when filling absence is detected, to cause shipper release, a second operation of said means thereafter due to slack filling when the loom is started rotating the actuator to bring the next cam lug in position ready to cooperate with the tail of the knock-off lever.

7 In a loom, a center filling-detecting instrumentality operative on every pick to detect presence or absence of filling, a shipper, releasing means therefor, including an intermittingly rotated member having a series of peripheral operating portions, and mechanism controlled by the filling-detecting instrumentality to rotate the actuator step by step, rotation of the actuator when filling absence is detected causing one of its operating portions to effect shipper release, a second rotative movement of said actuator, due to detection of slack filling when the loom is started, bringing the next operating portion of the actuator into position ready to operate.

In testimony whereof, I have si ned my name to this specification, in the presence of two subscribing witnesses.

HENRY CGTE.

\Vitnesses:

DAVID L. l/VAsrIBURN, I-IUBERT M. Conny.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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