US913915A - Take-up mechanism for looms. - Google Patents

Description

A. E. RHOADES.

TAKE-UP MECHANISM FOR LOOMS APPLIOATION FILED JULY 20. 1908.

9 1 3,9 1 5 Patented Mar. 2, 1909.

TH: No. ms PETERS cm, WASHINGTON. A c.

UNITED STATES PATENT OFFICE.

ALONZO E. RHOADES, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER COMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

TAKE-UP MECHANISM FOR LOOMS.

Specification of Letters Patent.

Patented March 2, 1909.

Application filed. July 20, 1908. Serial No. 444,485.

To all whom it may concern:

Be it known that I, ALoNzo E. RHOADES, a citizen of the United States, and resident of Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement in Take-Up Mechanism for Looms, of which the following description, in connection with the accompanying drawing, is a specification, like numerals on the drawing representing like parts.

This invention relates to that type of takeup mechanism for looms wherein means are provided to ermit a predetermined amount of let-back w en the operation of the take-up is arrested upon a change in the normal operation of the 100111, such for instance as a change'of filling following fillin failure, in order to prevent the formation of thin places or stri es in the cloth. Such let-back is he quenty effected by making use of a so-ealled let-back pawl, which is brought into action when the take-up mechanism is released temporarily from tie control of its actuating means, such pawl being arranged to let back the cloth for one pick, or for several picks, as desired. This pawl ordinarily rests upon and clicks over the teeth of the ratchet with which it cooperates, and it is found in practice that the pawl becomes unduly worn by its constant engagement with the ratchet, tending to improper action when the pawl is called upon to exercise its proper let-back function.

My present invention has for its object the production of means whereby the let-back pawl is maintained out of contact or engagement with its cooperating member until such time as let-back is called for, whereupon the pawl is at once and automatically placed in position to operate.

I have herein shown my invention as applied to a take-up mechanism operated by a positively and continuously rotating driving or actuatingmember, such for instance substantially as is shown in United States patent to Emery, No. 648,903, dated May 1, 1900, though with a modified construction and arrangement in certain particulars to be referred to hereinafter.

Figure ,1 is a front elevation of the take-up mechanism of a loom, with one form of my present invention embodied therein; Fig. 2 is a left-hand side elevation of the mechanism shown inFig. 1; Fig. 3 is an enlarged detail in front elevation of the controller for the let back pawl, to be referred to; Fig. 4 is a detail in side elevation of the let-back pawl and the ratchet with which it cooperates, and the controller for such pawl.

The take-up roll 1, its attached gear 2, intermediate gear 3 driven by the pinion 4 to which is attached a larger pinion 5 meshing with the pinion 6, the large gear 7 to which pinion 6 is attached, and the small gear 8 in continuous mesh with the gear 7 and having an attached ratchet 9, rotatably mounted on the shaft 10, may be and are all of substantially well known construction, whereby motion from the gear 8 is transmitted to the take-up roll.

As in the Emery patent a worm 12 on a constantly rotating shaft 11 meshes with a worm-gear 13 fast on the shaft 10, rotatable in the bearing 14, but herein I have shown clutch-teeth 15, Fig. 4, on the driven gear 8, adapted to cooperate with clutch-teeth 16 on the movable member 17 of the clutch, said member rotating with the shaft 10 and being movable longitudinally thereon. A yoke 18 fulcrumed at 19 serves to release the two series of clutch-teeth and a spring 20, Fig. 1, effects their cooperation, said yoke having a depending, cam-like extension 21 for a purpose to be referred to, and the yoke is connected by a link 22 with an arm 23, Figs. 1 and 2, loose on a rock-shaft 24, which latter may when turned efl'ect automatic filling replenishment in a well known manner. Such turning may be effected by a filling-feeler mechanism acting through arm 25, fast on the rock-shaft, when the filling in the running shuttle is exhausted to a predetermined extent. The arm 23 has rigidly connected with it an upturned extension 26, Fig. 1, adapted to be swung outward by the movement of the usual fork-slide (not shown) when filling absence is detected, as in the Emery patent. When the extension 26 is thus acted upon the link 22 is depressed and thereby the yoke 18 releases the clutch by disengaging the series of teeth 15 and 16, so that the take-up mechanism is released temporarily from the control of its driving or actuating means. WVhen so released letback is effected, and this is provided for by the slotted let-back pawl 27, pivotally and slidably mounted on a stud 28 on the stand 29 rigidly secured to the cloth roll guide 30, the pawl when cooperating with the ratchet 9 permitting let-back a predetermined distance, as will be familiar to those skilled in the art.

I make no claim to the clutch connection between the shaft 10 and the train of gearing connected with the take-up roll, nor to the control of the clutch by or through the yoke and the link 22, as the same are not of my invention, and are illustrated herein as a convenient form of apparatus.

In accordance with my present invention I allelism.

When the clutch is in operation the link 22 maintains the bracket 31 at such a height that the detent finger 35 of controller 34, en gaging the lug 36, will hold the let-back pawl 27 up and wholly free from contact with the ratchet 9, as best shown in Fig. 4, and less clearly in Fig. 2. Upon release of the clutch by downward movement of the link 22, as described, the bracket 31 is lowered and the controller 34 is rocked on its fulcrum 33, by the swing of the extension 38, so that the finger 35 releases the let-back pawl and it drops instantly into engagement with the ratchet 9, and then permits retrograde movement, or let-back, of the latter the predetermined amount. Return of link and yoke to normal position causes the controller to auto matically disengage the let-back pawl from the ratchet and retain said pawl in the posi-- tion shown in Fig. 4 until let-back is again called for.

The shipper 39 may be released by the action of a warpstopmotion, by means of the arm 40 having a cam-slot 41, Figs. 1 and 2, cooperating with the shipper, said arm being fast on a rock-shaft 42, and turned by longitudinal movement of a link 43, Fig. 2, as in the patent to Jamieson No. 729,593 dated June 2, 1903 when a warp fault occurs.

I have shown a wiper 44 fast on the shaft 42, adapted to cooperate with the cam-like extension 21 of the yoke 18, so that when the said shaft is turned at the time of loom stoppage the coo eration of the wiper and yokeextension wi operate the yoke and release the clutch. At such time the movement of the yoke acts through its upward extension 38 to rock the controller 34 and thereby throw into 0 eration the let-back pawl. As the link 22 wi I also tend to be drawn downward by such operation of the yoke I have provided a slot-and-pin connection 22 between said link and the arm 23, to avoid any movement of said arm and its extension 25.

, From the foregoing description and the drawings it will be manifest that while provision is made for let-back the cooperating members of the let-back device, herein the pawl 27 and ratchet 9, are normally out of contact, wholly and absolutely, and are only permitted to cooperate when let-back is called for, whereby the unnecessary wear of the parts of the let-back device is altogether obviated.

Various changes or modifications in details of construction and arrangement may be made by those skilled in the art without departing from the spirit and scope of my invention as set forth in the claims annexed hereto.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is 1. The combination with take-up mechanism, and actuating means therefor, of means to effect automatically temporary release of said mechanism from the control of its actuating means, a let-back device, comprising a ratchet and a let=back pawl, and means to permit engagement and cooperation of said pawl and ratchet only when such tem orary release of the take-up mechanism is e ected.

2. In a loom, in combination, take-up mechanism, a let-back pawl and a ratchet with which it cooperates to effect let-back, a controller for and normally maintaining the pawl out of contact with the ratchet, and means to arrest take-up temporarily, said means at such time actuating, the controller to effect release of the let-back pawl and permit it to cooperate with the ratchet.

3. In a loom, in combination, take-up mechanism, means to arrest its operation automatically upon the occurrence of a warp or a filling fault, a let-back device, including a letback pawl and means to move the pawl into inoperative position and normally retain it inoperative, and to move it into position to operate only when take-up is arrested.

4. In a loom, in combination, take-up mechanism, actuating means therefor normally connected therewith, a let-back device, including a let-back pawl, and means to move the pawl into position to operate when the take-up mechanism and its actuating means are disconnected and to cooperate with and positively move the pawl into inoperative position when said mechanism and its actuating means are connected.

5. In a loom, the combination, with takeup mechanism, actuating means therefor, and an instrumentality to release said mechanism from the control of said means upon a redetermined change in the operation of the 00m, of a let-back device, comprising a ratchet and a let-back pawl, a controller for the pawl, normally maintaining it out of contact with the ratchet, and means whereby the operation of said instrumentality causes the controller to permit the pawl to operate only when the take-up mechanism is released from the control of its actuating means.

6. Take-up mechanism, a let-back pawl and a ratchet with which it cooperates to effect let-back of said mechanism, and means to remove the pawl from contact with the ratchet when the take-up mechanism is in operation and to permit the engagement of the awl with the ratchet when the operation of the take-up mechanism is arrested.

7. In a loom, take-up mechanism, actuating means therefor normally in operative connection therewith, separate devices to disconnect the said mechanism and its actuating means upon the occurrence of warp and filling faults, respectively, a let-back pawl and a ratchet with which it is adapted to cooperate, to permit let-back of the take-up mechanism, a controller to hold the said pawl out of contact with the ratchet or to permit its cooperation with the ratchet, and means to cause said controller to release the pawl when the actuating means is disconnected from the take-up mechanism and to retract the pawl when the said mechanism is connected with its actuating means.

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

ALONZO E. RHOADES.

Witnesses:

EDWARD DANA Oseoon, ALBERT W. EDWARDS.

Images