US1673998A - Weft-detecting mechanism - Google Patents

Description

E. H. RYON WEFT DETECTING MECHANISM June 19, 1928. 1,673,998

Original Filed May 2- 1 2 Sheets-Sheet l Mar-1394s WEFT DETECTING MECHANISM Original Filed May 2. 1921 2 Sheets-Sheet 2 Patented June 19, 1928.

UNITED STATES 1,673,998 PATENT OFFICE.

EPPA H. RYON, OF PASADENA, CALIFORNIA, ASSIGNOR TO OROMPTON &'KNOWLES LOOM WORKS, 011 WORCESTER, MASSACHUSETTS,-A CORPORATION OF MASSACHU SETTS.

WEFT-LDETEGTING MECHANISM.

Original application filed May 2, 1921, Serial No. 465.963, and 'nGre-at Britain mm 13, 1923. Divided i and this application filed July 2, 1926. Serial No. 120,212.

This is a divisional application, the original application having been filed May 2, 1921, Serial No. 465,963, and having issued as Patent No. 1,595,249, dated August 10, 1.926. i

It is the general object of my present in vention to improve the construction and method of operation of such mechanism, to the end that more reliable and efiicient results may be obtained. With this object in view, one feature of my invention relates to the provision of detecting mechanism in which. the controlling member is normally inoperative but is placed in operative position upon substantial weft exhaustion and remains in such position for an unusually extended period of time.

A further object of my invention is to provide a weft detecting mechanism in p which the yielding movements of all parts are. controlled by a single spring.

My inventionfurt-her relates to arrangements and combinations of parts which Wlll be hereinafter described and more particu- 25, larl'y. pointed out inthe appended claims.

A preferred form of my invention is shown in the drawingsin which Fig. 1 is a plan view of :my improveddetectingmechanism; Fig. 2 is a side elevation thereof;

Fig. 3 is an enlarged perspective View of the movable detecting member;

Fig. 4 is a corresponding view of the fixed detecting member Fig. 5 is an enlarged detail sectional view of. the fixed and movable detecting members; Figs. 6 and 7 arerdiagrammatic side and plan views showing the position of certain parts after engagement by a full weft carrier' Figs. 8 and 9 are similar views showing the normal position of these partsyand Figs. 10- and 11 are similar views showing the position of these parts after engagement by a substantiall exhausted weft carrier.

Referring to tlie drawings, I have shown my improved detecting mechanism associated withindicating apparatus of a well known type, more fully disclosed in my prior Patent No. 972,722, issued October 11, 1910. a v

For the purposes of this application I have shown an actuator 20 having a swinging verticahmovement in a slot2l formed in a promotion on a stand 22 suitably supmember or rod 23 is slidablein an opening "in. the stand 22 extending transversely across the slot 21. The rod 23 .is pivotally connected to an arm 24 fixed to the end of ported on the loom frame. A controlling a cross shaft 25 mounted in bearings in the stand 22. A forked arm 26 is adjustably secured to the opposite end of the shaft 25 and s formed with two projectingportions 27 and 28.

When the parts are in the normal position shown in Figs. 8 and 9, the controlling member or rod 23 is withdrawn from the slot 21, permitting the actuator 20 to swing- ,idly in the slot without affecting the indiabove referred to.

weft carrier may be: of any suitable type .but as shown herein comprise a casing 30,

mounted on a stud 31(Fig. 2) fixed in the stand 22, and angularly adjustable thereon by means-of a supporting screw 32 and lock nut 33. i p

. A box-like rectangular slide 34 is movabl mounted in the casing 30 and at its rear cut is formed with a plurality of toothed detecting surfaces 35, 36 and 37, the teeth being preferably disposed in a'convex curve as shown in Fig. 1. The fixed detectors35 and 37 are preferably formed directly from the top and bottom portions of the slide 34, while the intermediate detecting surface 36 is formed as a separate plate 36*fpositioned between the surfaces 35 and 37 by spacing blocks38.

A movable detecting member 39 is pivoted on aneccentric screw. or stud 40 in the slide 34 and is preferably provided with two sets of weft engaging teeth 41 and 42, movable between the detecting surfaces 35, 3'6 and 37. The detecting member 39 is formed as shownin Fig. 3 to permit the teeth 41 and 42 to pass on each side of the metal plate 36. The sides of the teeth 41 and 42 are preferably bevelled to prevent shearing action with the fixed detecting members.

The parts which more directly engage the A rod 43 is slidable in the slide 3-l and at its rear or. right hand end is provided with a hook 44 and :1 lug or projection l5 engaging opposite sides of an arm 46 on the movable detector 39. A lever 47 is pivoted on a stud or screw 48 at the front end of the slide 34 and extends transversely across the slide, with its outer end engaging the projections 27 and 28 of the arm 26. A screw 49 isthreaded in a lug 50 depending from the rod 43 and forms an adjustable stop to limit rearward movement of the slide. A spring arm 51 (Fig. 1) is rotatably mounted on a fixed stud 52 and is pressed against the lever 47 by a spring 53, one end of which engages the arm 51 and the other end of which is secured in an adjustable collar 54:. The forward or left hand end of the sliding rodel3 is bent or doubled upon itself toincrease the stiffness of the portion which is engaged by the lever 47.

The method of operation of the detecting mechanism is indicated in Figs. 7 to 11 inclusive. The normal position of the parts is shown in Figs. 8 and 9 in which the spring arm 51 presses the rod 43 rearward until the stop screw 49 on the rod 43 en gages the front end of the casing 30. The spring arm also acts through the pivot 48 to force the slide 3% rearward, swinging the movable detector 39 against the toothed intermediate plate 36 which acts as a stop to position the detector as shown in Fig. 9. At the same time, the forked arm 26 is moved by the lever 47 to the upright position shown in Fig. 8, with the controlling rod 23 withdrawn from the slot 21.

When the detectors are engaged by a weft carrier having a sufficient supply of weft thereon. swinging movement of the movable detector 39 is prevented and the slide is moved directly back as shown in Fig. 7.

The lever 47 passes above the portion 28 of the arm 26 and retains the rod 23 in inoperative position.

If, however, the detectors engage a substantially exhausted weft carrier, the teeth of the fixed detecting members 35, 36 or 37 will engage the weft carrier, while the movable detector 39 is free to swing on its pivot,

as the teeth thereon are at a slightly less radius than the teeth of the fixed detecting members. The pivot 40 of the detector 39 is moved forward or to the left by the continued forward movement of the lay, while the end 46 of the detector 39 remains in substantially fixed position. The pivot 48 of the lever 47 moves forward with-the pivot 40, both being mounted on the slide 34, and the lever 47 swings about the forward end of the rod 4-3 as a center. This results in a movement rearward or to the right in Fig. 11 for the outer swinging end of the lever 47 which, by engagement with the portion 27 of the arm 26, moves the arm to the ponevaeos sition shown in Fig. 19 and advances the rod 23 to operative position in the path of the actuator 20.

As the lay again moves rearward, the slide 3i and parts associated therewith re turn to the normal position shown in Fig. 9 with the exception that the arm 26 remains in the position shown in Fig. 10. The rod 23 is thus left in the path of the actuator until the next forward movement of the lay, when the arm restored to the original position shown in Fig. 8, by engagement of the fixed detecting portions by the yarn on a well filled weft carrier.

The structure of the weft detector per se is not claimed herein but forms the present subject matter of the original application.

Having thus described my invention it will be evident that changes and modifications can be made therein by those skilled in the art within the spirit and scope thereof as set forth in the claims, and I do not wish to be otherwise limited to the details herein disclosed, but what I claim is:-

1. \Veft detecting mechanism having, in combination, an actuator, a controlling member normally withdrawn from the path of the actuator but movable to render said actuator operative, and weft controlled means to position said member. said means comprising a slide, a detector fixed to said slide, a detector pivoted to said slide, a lever pivoted to the front end of said slide and extending tansversely thereof, said lever being movable relatively to said slide by said movablc'detector, and a connection from said lever to said controlling member.

2. Weft detecting mechanism having, in combination, an actuator, a controlling member normally withdrawn from the path of the actuator but movable to render said actuator operative, and weft controlled means to position said member, said means comprising aslide, a detector fixed to said slide, a detector pivoted to said slide, a lever pivoted to the front end of said slide and extending transversely thereof, said lever being movable rcarwardly on said slide under the control of said movable detector upon indication of weft exhaustion and a connection from said lever to said controlling member.

lVeft detecting mechanism having, in combination, an actuator, a controlling member normally withdrawn from the path of the actuator but movable to render said actuator operative, and weft controlled means to position said member, said means comprising a slide, a detector fixed to said slide, a detector pivoted to said slide, a rod connected to move with said movable detector, a lever pivoted to the front end of said slide and extending transversely thereof, said lever being engaged by said rod, a connection from said lever to said controlling member, and a spring arm yieldingly engaging said lever between its pivot and said connection.

l. Weft detecting mechanism having, in combination, an actuator, a. controlling member normally withdrawn from the path of the actuator but movable to render said actuator operative, and weft controlled means to position said member, said means comprising a cross shaft to which said membeer is connected, a forked arm on said shaft, a weft detector, a slide supporting said de tector, a lever pivoted on said slide and engaging the forked portion of said arm, and a yielding element engaging said lever bet-ween its pivot and point of engagement with said arm.

5. Weft detecting mechanism having, in combination, an actuator, a controlling member normally withdrawn from the path of the actuator but movable to render said actuator operative, Weft controlled means to position said member, said means comprising a slide, a detector fixed thereon, a detector movably mounted thereon and yield ingly held in non-indicating position, and a connection and said controlling member permitting said member to move to ope 'ative position upon a side-wise movement of said movable detector from normal non-indicating posibetween said movable detector tion to indicate weft exhaustion, said controlling member being reset in inoperative position by subsequent forward movement of said slide with said movable detector in normal position and held from angular movement thereon.

6. Weft detecting mechanism having, in combination, an actuator, a controlling member normally withdrawn from the path of the actuator but movable to render said actuator operative, Weft controlled means to position said member, said means comprising a slide, a detector fixed thereon, a detector movably mounted thereon and yieldingly held in non-indicating position, and a connection between said movable detector and said controlling member permitting said member to move to operative position upon sidewise movement of said movable detector from normal non-indicating position to indicate Weft exhaustion, said member remaining in operative position as said slide returns to its rearward position and being reset in inoperative position by subsequent forward movement of said slide with the movable detector in normal position and held from angular movement thereon.

In testimony whereof I fixed my signature.

have hereunto af- EPPA H. RYON.

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