US1369473A - Weft-replenishing mechanism - Google Patents

Description

E. H. RYON. WEFT REPLENISHING MECHANlM.

APPLICATION FILED JAN. 28, I9I9- Patented Feb. 22, 1921.

3 SHEETS-SHEET I.

E. H. RYON.

WEFT REPLENISHING MECHANISM.

' APPLICATION FILED JAN.28, 1919.

3 SHEETS-SHEET 2.

Patented Feb. 22, 1921.

E. H. RYON.

WEFT REPLENISHING MECHANISM.

APPLICATION FILED JAN,281919.

1,369,473. I Patented Feb. 22, 1921.

3 SHEETS-SHEET 3- UNITED STATES PATENT OFFICE.

EPIPA H. RYON, OF WALTHAM, MASSACHUSETTS, ASSIGNOR TO CROMPTON & KNOWLES LQOM WORKS, OE WORCESTER, MASSACHUSETTS, CORPORATION OF MASSA- CHUSETTS.

means.

Specification ofLetters latent.

Patented Feb. 22, 1921.

Application filed January 28, 1919. Serial No. 273,671.

To all whom it may concern:

Be it known that I, EPPA H. RYoN, a 01th zen of the United States, residing at Waltham, in the county of Middlesex and State of Massachusetts, have invented a new and useful Weft-Replenishing Mechanism, of which the following is a specification.

This invention relates particularly to 1mprovements in weft replenishing mechanism of the general type disclosed in my prior application, SeriaLNo. 2%,637, filed July 12, 1918.

In this prior application I have shown a weft detector mounted independently of the lay and engaging the weft carrier through the open upper side of the shuttle. In t e preferred form the detector was mounted on the transferrer and was moved toward the shuttle on each alternate beat of the la The detector was normally held yieldmg y in operative position relative to the transferrer and had a detecting actlon on ever downward stroke of the transferrer, inclu ing the stroke by which a fresh weft carrler was inserted in the shuttle. Detecting action during the first part of the transferring stroke has been found undesirable, as the engagement of the fresh weft carrier by the detector during the first part of the move-- ment of the weft carrier from the magazine toward the shuttle may cause displacement of the weft carrier or an incorrect indication of weft exhaustion by the detector.

It is the general object of my invention to provide a construction in which the weft detector is normally in inoperative position relative to the transferrer and in which the effective action of the weft detector occurs after the transferrer has partially performed its downward movement.

Another object 'is to provide means by which a detector mounted upon and movable with a transferrer may be moved at a greater speed than the transferrer during a portion of the detectin stroke. 7 i

To the attainment 0 these objects in the preferred construction, I provide, means,

such as a lever mounted on the transferrer, by which the detector may be advancedto' detecting position during the latter part of the downward movement of the transferrer. Such advance movement of the detector and lever may conveniently be caused b engage-- ment of said lever by a relatively xed stop.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

Av preferred form of my invention is shown in the drawings, in which Figure 1 is a front elevation of a portion of a magazine embodying my invention;

Fig. 2 is a similar view, partly in section, and showing certain parts in a different posltlon;

Fig. 3 is a side elevation of a portion of the magazine;

Fig. 4 is a detail elevation looking in the dlrection of the arrow 4 in Fig. 3;

Fig. 5 is a sectional view taken along the line 5--5 in Fig. 3, and

Fig. 6 shows certain'of the parts in Fig. 1 at the beginning of transfer. I

Referring particularly to Fi s. 1 and 2, I have indicated a magazine rame 10 to which a frame member 11 is rigidly secured in spaced relation. A transferrer 12 is pivoted on a stud 13 fixed in the magazine frame 10, said transferrer being actuated on every alternate beat of the lay through a link 1 1 (Fig. 3) from driving mechanism not shown.

A pin or rod 15 is slidably mounted in horizontal position in the transferrer 12 and normally occupies the positi Jn shown in Figs. 1 and 2. When moved to the left by the weft detecting 'm'echanism, the rod 15 engages apcam 16 (Figs. 3, 4.- and 5) as the transferrer rises, thus swinging an arm 17 about its pivot 18, and operating suitable mechinisrn through the se mental gear 19 to release a weft carrier V6 so that it may advance to transfer position.

All of the. parts thus far described are essentially similar in construction and operation to the corresponding parts. in my prior application. I have, however, omittedthe spring shown in my earlier application for holding the rod 15 normally to the right and have provided instead a cam surface 20 (Fig. 4)- on the arm 17. Asthe transferrer rises the rod 15 first engages the cam 16 and moves thearm 17, and'as it 0011- tinuesto rise thereafter engages the cam 20 and is restored to normal position in which it remains until moved therefrom by weft detecting mechanism to be now described.

This 'weft detecting mechanism comprises a detector 21 pivoted at 22 in the fork of a lever 23 which in turn is pivoted at 24 to. the transferrer 12. The lower end of the detector is commonly provided with teeth or otherwise roughened. A light spring 25 between the transferrer 12 and the lever 23 normally moves the lever and detector upwardly until the offset upper end 26 of the detector 21 engages a stop 27 formed on the arm of the transferrer 12. The lever 23 extends to the right beyond its pivot 24 and is at times engaged by a yielding stop 28 pivoted at 29 to the magazine frame member 11. A relatively heavy spring 30 interposed between the frame member 11 and an arm 31 of the stop 28 yieldingly moves the stop 28 upwardly until an adjusting screw 32 thereon engages a lug 33 on the frame.

The arts are shown in normal position in full Hines in Fig. 1 with the detector 21 raised to inoperative position relative to the transferrer 12. The parts remain in this position until the transferrer is drawn downward by the rod 15. Continued downward movement causes the lever- 23 to engage the stop 28 by which it is swung about its pivot 24, thus advancing the detector 21 to engage thev weft carrier W.

If a well-filled weft carrier is engaged, as shown in Fig. 2, the teeth on the end of the detector will engage the weft and the detector will be held in the upright position shown in Fig. 2, in which position it clears the slidin rod 15 previously described. As the trans errer continues to move downward the stop 28 will yield to permit downward movement of the lever 23 as is also indicated in Fig. 2.

en, however, the detector engages a substantially exhausted weft carrier, the end of the detector slides along the weft carrier to the position shown in dotted lines in Fig. 1, and during this movement of the detector the upper end thereof acts as a cam upon the rod 15, sliding the same into position to engage the cam 16 on the arm 17 (Fig. 3). The time of action of the detector may be varied by adjustment of the stop 28 by the screw 32.

It will be noted that the movement of the detector, after the lever 23 engages the stop 28, is more rapid than the movement of the transferrer upon which the detector is mounted. This enables the detector to maintain effective contact with a fresh weft carrier during the latter part of its transfer movement and prevents false indication of weft exhaustion.

With this arrangement of parts, itwill be seen that the detector is not advanced to engage the weft carrier until the transferrer has partially performed its downward movement. Time is thus provided during which the transferrer, on the occasion of transfer, can advance the fresh weft carrier into en- .tions can be made therein by those skilled in the art Without departing from the spirit and scope of my invention 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. In a weft replenishing loom, in combination, a magazine, a transferrer, a detector movable therewith, and means to give said detector an additionalmovement relative to said transferrer as the latter descends.

2. In a weft replenishing loom, incombination, a magazine, a transferrer, a detector mounted on said transferrer and normally held in inoperative position thereon, and means to advance said detector to operative position as said transferrer descends.

3. In a weft replenishing loom, in combination, a magazine, a transferrer, amember movably mounted on said transferrer, a detector movably mounted. on said member,

and means to move said member and detector relative to said transferrer as the lat-' said transferrer,-a detector pivoted to said I member and normally held in inoperative position, and a yielding stop positioned to engage said member as said transferrer descends and to thereby advance said detector to operative osition.

5. In a we replenishing loom, in combination, a magazine, a transferrer, a lever pivoted to said transferrer, a weft detector pivoted to said. lever, a stop for said detector fixed on said transferrer, yielding means to hold said detector normally against said stop, and a yielding device on said magazineefi'ective to engage said lever as said transferrer descends to thereby give said detector a detecting movement.

6, In a weft replenishing loom,' in combinatlon, a magazine, a transferrer, a weft .detector mounted thereon, a rod freely slidable in said transferrer and movable from normal posltion by said detector upon substantial exhaustion of the active weft carrier, transfer indicating mechanism operable by sa1d rod after such movement thereof by said detector, and means to restore said rod to normal position.

7. In a Weft replenishing loom, in combination, a magazine, a transferrer, a weft detector mounted thereon, a rod freely slidable in said transferrer and movable from normal position by said detector upon substantial exhaustion of the active Weft carrier, and a transfer-indicating arm movable by said rod when thus positioned by said detector, saidJ arm having a cam surface thereon effectlve to restore said rod to nor- 1 mal position during continued upward movement thereof.

8. In a weft replenishing loom, in combination, a magazine, a transfcrrer, a detector movable therewith, and means to advance said detector more rapidly than said transferrer, during a portion of the transferring movement thereof.

a In testimony whereof I have hereunto affixed my signature.

EPPA H. RYON.

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