US600836A - And hoped ale - Google Patents

Description

(No Model.)

0. A. LITTLE FIELD.

LOOM.

No. 600,836. Patnted Mar. 15,1898.

' tron.

CHARLES A. LITTLEFIELD, OF LOWELL,

MASSACHUSETTS, ASSIGN OR TO THE DRAPER COMPANY, OF PORTLAND, MAINE, AND HOPEDALE, MASSA- OHUSETTS.

LOOIVI.

SPECIFICATION forming part of Letters Patent N 0. 600,836, dated March 1 5, 1898. Application filed October 8, 1897. Serial No. 654,50'7. (No model.)

To all whom it may concern.-

Be it known that I, CHARLES A. LITTLE- FIELD, of Lowell, county of Middlesex, State of Massachusetts; have invented an Improvement in Looms, of which the following description, in connection with the accompanying drawings, is a specification, like letters and numerals on the drawings representing like parts.

This invention relates to that type of looms for weaving wherein means are provided for automatically effecting a change of filling when the filling in the shuttle fails or becomes exhausted, looms of this type being shown in United States Patents N 0. 454,808, dated June 23, 1891, and No. 529,940, dated November 27, 1894, to which reference may be had. In such looms the filling feeder or hopper at times becomes empty before the attention of the attendant is directed thereto, and ordinarily the loom will continue to run, the transferrer operating, and the stoppage of the loom will not be effected until the attendant notices that the feeder is empty and he either stops the loom or refills the feeder. Obviously the running of the loom is objectionable when the feeder is empty, as no useful work is effected, and the take-up mechanism may continue to work for some little time.

My present invention has for its object the production of means for automaticallyeffecting the stoppage of the loom when the fillingfeeder is exhausted.

The various novel features of my invention as herein embodied will be fully described in the specification and particularly pointed out in the claims.

Figure 1 is a front elevation, centrally broken out, of a sufficient portion of a loom to be understood with my invention embodied therein. Fig. 2 is a vertical transverse sectional View thereof on the line so 00, Fig. 1, the parts being shown in normal position. Fig. 3 is a detail view of the position assumed by the greater part of the mechanism shown in Fig. 2 after a double movement of the transferrer, and Fig. 4 is a top or plan View of the detent-pawl of the take-up.

The loom-frame A, the lay A and ratchetwheel T of the take-up mechanism and its actuating-pawlT are of usual construction,

asare the filling-fork F, operative at every alternate pick to detect the presence or absence of the filling, and the operating rockshaft or rod F, rocked in usual manner upon failure of the filling, and said parts need not be more fully described herein, as they form nopart of my invention.

For convenience I have herein shown the loom as provided with filling-supplying mechanism comprising a fixed hopper or feederB B located above the shuttle-box at one end of the lay, substantially as in United States Patent No. 454,808, dated June 23, 1891, and to which reference may be had. It is to be understood, however, that my invention is equally applicable to looms wherein the filling-carriers are mounted in a rotatable hopper or feeder, as in United States Patent N 0. 529,940, dated November 27, 1894, in each case the fresh filling-carriers being presented singly to the action of a transferrer which at the proper time acts automatically to transfer a fresh filling-carrier to the shuttle and to eject therefrom the filling-carrier therein.

I have herein shown the transferrer f as pivotally mounted on a stud f on the frame and having a depending leg f on which is fulcrumed a normally inoperative dog adapted when moved into operative position to be engaged by a bunter O on the lay to operate the transferrer on the forward beat of the lay, the upward movement of the dog bein g limited bya stop projection 3 on the legf The operating rock-shaft F is extended through the loom side and has fast thereon at its outer end an arm I), provided with a laterally-extended stud b, on which is mounted a controller 19 held by a suitable spring .9, Fig. 1, against the dog f When the shaft F is rocked upon failure of the filling, the arm 12 is elevated, moving the dog into the path of the hunter 0, and as the upward movement of the'dog is stopped by the lug 3 the spring 8 yields as the arm I) completes its swing. The free end of said arm is enlarged and has a substantially L- shaped slot b therein, Figs. 2 and 3, into which is extended a pin 4 on the controlling member 0 of the detent-pawl d. .(Shown separately in Fig. 4.) i

The controlling member is fulcrumed on a stud e on the loom side, and it is so shaped that the pawl dis movable therein, a headed adjustable stud on the pawl passing up through a slot 6 in the member 0 to prevent separation of the parts.

As shown in Fig. 2, the pawl 01 is slotted at d to embrace the stud e and slide therein when released by the member 0, the latter having a downturned lip c to engage one of a series of teeth d on the top of the pawl. Normally the pawl d rides over the teeth of the ratchet-wheel T in usual manner, holding the same as the pawl T is moved to take a fresh hold, the lip c engaging the lowest one of the teeth Upon failure of the filling the arm I) is swung inward, as described, and after the dog f has been moved into operative position the pin t meets the outer end of slot 19 and the member 0 is lifted carrying with it the pawl 01 far enough to lift it from the ratchetwheel T. As the movement of the arm I) is completed the pawl is released by its controlling member and it is free to slide by gravity longitudinally on the stud c in an inward direction until stopped by the outer end of the slot d or by other means.

Referring now to Fig. 1, the shipper-lever S, held in the usual plate N while the loom is running properly, is released from said plate at the proper time by a knock-off arm 70, fast on a rock-shaft extended across the loom, as herein shown, said shaft having fast thereon a short arm is, having a recess or hole k therein. (See dotted lines, Figs. 2 and 3.)

The stopping mechanism for the loom comprises the usual fast and loose pulleys and belt-shifter, controlled by the shipper-lever S, the latter member only of said mechanism being shown.

On the loom side adjacent the rocker-arm 70' I have pivoted at h an actuator for the stopping mechanism, shown as substantially a bell-crank lever h h, the arm h having a lateral extension 72?, while the arm h is provided with a projection or pin k normally adapted to enter the aperture 70 in the arm 70.

The lower end of the leg f of the transferrer is provided with a toe f adapted to engage the extension 72 of the actuator and rock the same on its fulcrum h each time the transferrer is operated, such movement of the actuator tending to move the pin 7L into the aperture of arm 70 without rocking the latter. Should the aperture be closed, however, the movement of the actuator will be imparted to the arm 70 to thereby rock the shaft k and release the shipper-lever to effect stoppage of the loom.

In the embodiment of myinvention as herein shown I provide the pawl d with an upturned extension 01 provided with a stud d, on which is mounted an intermediary (1 shown as a blade-like member adapted to be moved by the sliding movement of the pawl between the rocker-arm 7c and the actuator h h when said parts are separated. When said intermediary is thus interposed, the stud 7L3 cannot enter the recess or aperture in the rocker-arm, and the movement of the actuator by the transferrer will thereby be made effective to rock the shaft 70 and so effect stoppage of the loom. Now supposing the last filling-carrier in the feeder to have been transferred to the shuttle upon failure of the filling, either by breakage or exhaustion, the filling-fork will detect it at the first shot and, operating as described, will on the first forward beat of the .lay thereafter operate the transferrer. As the transferrer is operating the detent d will be withdrawn from the ratchet T; but before the intermediary d can move into operative position the actuator h h will have moved to enter the stud 71, in the recess of arm 71",. Now as the lay moves back the detent will be lowered; but the lip 0 will engage that one of the teeth d nearest the fulcrum of the pawl and the intermediary will be in position immediately adjacent the actuator and rocker-arm. As the lay moves up the second time the transferrer will not be operated, as at that pick the filling-fork is not operated. The let-back of the ratchet T, however, acts on the pawl 01 and moves it until the lip c engages the second tooth d corresponding to one pick; but the intermediary will be nearer the actuator and rocker-arm than when in normal condition. At the third forward beat of the lay, which will be after the third shot of the shuttle, the filling-fork will not be tipped, as there is no filling present, it being remembered that the hopper is empty. Accordingly the detent at will be again lifted as the lay moves up after the third shot and the transferrer will be operated for the second time, it in turn moving the actuator h h; but before this movement of the actuator takes place the release of the detent permits the intermediary to move the short distance now required intooperative position, so that when the actuator is moved the rockerarm 70 will be moved with it and the stopping mechanism operated by the third beat of the lay. The take-up pawl T is not lifted from the ratchet, and when the detent d is inoperative the pawlT will rock the ratchet-wheel in one direction, while the tension of the cloth will move it back as the pawl moves forward. Thus there will be no gain in the take-up during disengagement of the detent, and when the shipper is reset to start the loom the de tent 01 will be moved back by the ratchet, so that it will resume its normal position relative to its controlling member 0 after three picks. Each pick corresponds to a tooth d on the detent, three such teeth being shown, and at each return movement of the take-up pawl the lip c engages a tooth d nearer the free end of the pawl.

The pivotal mounting of the intermediary 61 is necessary in order to permit free movement thereof when the actuator moves the the hopper or filling-feeder is empty, or if two successive filling-carriers should misthread or the filling break in each, the term double operation of the transferrer meaning the two operations thereof corresponding to two successive failures of the filling-fork to detect the presence of filling. Primarily, however, my invention is devised to automatically stop the loom when the hopper is empty, the absence of the filling being made effective to cause the operation of the mechanism at such time.

While Ihave shown the intermediary herein somewhat in the nature of a gate to close the aperture or recess in the rocker-arm 10', my invention is not restricted to such construction, for obviously other means for causing effective operation of the actuator could be employed without departing from the spirit and scope of my invention.

By the term double failure of the filling used hereinafter in some of the claims I mean two failures of the filling which are detected by two successive detecting movements of the filling-fork.

Having fully described my invention, what I claim, and desire to secure by Letters Patent is- 1. In aloom provided with filling-supplying mechanism, including a transferrer, means operative upon failure of the filling to actuate the transferrer, stopping mechanism for the loom, a filling-fork, and means controlled jointly by the transferrer and said fillingfork, to effect operation of the stopping mechanism upon a double failure of the filling, substantially as described.

2. In a loom provided with filling-supplyin g mechanism, including a transferrer, means operative upon failure of the filling to actuate the transferrer, stopping mechanism for the loom, means actuated by the transferrer to effect the operation of the stopping mechanism, take-up mechanism, including a detent, and an intermediary governed by the detent to cooperate with said transferrer-actuated means andstop the loom upon a double action of the transferrer, substantially as described.

3. In a loom provided with filling-supplying mechanism, including a transferrer, means operative upon failure of the filling to actuate the transferrer, stopping mechanism for the loom, an actuator therefor moved by each operation of the transferrelytake-up mechanism, including a detent, and an intermediary governed by the detent to cooperate with and render the operation of the actuator eifective to causethe stoppage of the loom upon a double operation of the transferrer, substantially as described.

4. In a loom provided with filling-supplying mechanism, including a transferrer operative upon failure of the filling to effect a change of filling in the shuttle, stopping mechanism for the loom, a normally-inoperative actuator therefor moved by the transferrer at each operation thereof, an intermediary adapted to cooperate with and render the movement of the actuator effective to stop the loom, and means to operate said intermediary upon a double failure of the filling, substantially as described.

5. In a loom provided with filling-supplying mechanism, including a transferrer operative upon failure of the filling to effect a change of filling in the shuttle, stopping mechanism for the loom, including an apertured rockerarm, a pivotally-mounted actuator operated by the transferrer and provided with a projection to enter the aperture in said rockerarm, an intermediary adapted to be interposed between said arm and actuator, to thereby cause the former to be rocked, and means, operative upon failure of the filling to move said intermediary into operative position upon a double failure of the filling, substantially as described.

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

CHARLES A. LITTLEFIELD.

Witnesses:

JOHN C. EDWARDS, A. O. HARMON.

Images