US1547505A - Weft-detecting mechanism for looms - Google Patents

Description

July 28, 1925.

c. LEFEBVRE WEFT DETECTING MECHANISM FOR LOOMS Filed Aug. 27, 1923 Patented July 23, 1925.

a n starts t,54?,535 earner veaines.

CHARLES LEFEBVRE, OF LOWELL, MASSACHUSETTS, ASSIGNOR TO CBOMPTON 85 KNOV/LES 1100M WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

VJEFT-DETECTING MECHANISM FOR LOOMS.

Application fi1ec1 August 27, 1923. Serial No. 659,480.

To all whom it may concern Be it known that CHARLES Lnrnnvnn, a citizen of the Republic of France, residing at Lowell, in the county of Middlesex and State of Massachusetts, have invented a new and useful Weft-Detecting Mechanism for Looms, of which the following is a specification.

This invention relates to improvements in weft detecting mechanism of the type shown in the prior patent to Ryon, No. 1,352,536, issued September 14, 1920. In this type of weft detecting mechanism the weft is simultaneously engaged by two detecting members, one of which is fixed to a. supporting slide and the other of which is pivoted thereon. The relative position of the two detecting members sometimes needs adjustment to suit different sizes of weft or other changes in operating conditions.

It is the object of my present invention to provide an improved construction by which the pivot or bearing of the movable detecting member may be very easily moved longitudinally of the supporting slide whenever such adjustment is found desirable.

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

A preferred form of my invention is shown in the drawings, in which- Fig. l is a plan view of weft detecting mechanism embodying my improvements;

Fig. 2 is a. plan View of certain parts of 30 the detecting mechanism, with the upper plate of the supporting slide removed;

Figs. 3 and 4 are views similar to Fig. 2 but showing the parts in different positions;

Fig. 5 is a detail sectional elevation, taken along the line 5-5 in Fig. 1;

Fig. 6 is a transverse sectional elevation, taken along the line 6-6 .in Fig. 2; and

Fig. 7 is a partial plan view of one end of the supporting slide.

Referring to the drawings, I have shown a weft detecting mechanism which is in general of substantially the construction shown in the Ryon patent above noted and which includes a stand 10 adapted to be fixed to the loom frame and having a guideway or slide casing 11 formed at the end thereof. A supporting slide 12 is mounted in the guideway 11 and is yieldingly movthe rear or right hand end of the slide 12- and a movable detecting member 15 is pivoted therein on a stud 16' and is normally positioned closely adjacent the detecting member 14. The pivoted member 15 has a laterally projecting arm 17 extending between the hooked end of a stop rod 18 and the rear end of a second rod 19. The rod 19 is mounted for endwise movement in suitable bearings within the slide or support 12 and the forward or left hand end of the rod 19 engages an arm 20 on a rock shaft 21.

A second arm 22 on the shaft 21 is pivotally connected to a rod 23 slidable thereby into and out of the path of an actuating member 24. The actuating member is normally inoperative but when the rod 23 remains .in its rearward position, in the path of movement of the member 24, the member 24 then becomes operative to indicate weft exhaustion.

The stud 16 for the pivoted member 15 is not mounted directly on the slide 12 but extends through a slot 25 in the lower plate thereof (Fig. 5), being confined therein by a nut 26. The stud 16 also extends through an opening 27 in a supporting rod 28 which is slidably mounted in the slide 12 and which is pressed yieldingly rearward by a spring The front portion of the support 28 is formed as a round rod of reduced section upon which is threaded an adjusting nut 31 having a projection 32 adapted to engage the front end of the slide 12 and to act as a stop to limit rearward movement of the support 28 in the slide. The upper and lower plates of the slide 12 are provided with projecting portions 33 (Fig. 7) which enclose the end of the projection 32 and thus maintain the adjustment of the support 28.

The normal position of the parts is indicated in Fig. 1, with the movable detecting member 15 closely engaging the fixed detecting member 14. When the detecting mechanism engages a weft carrier W having a considerable amount of relatively soft weft or filling thereon, as indicated in Fig. 3, the

spring 30 permits the detecting member to move bodily forward in the slide 12.

Such movement further withdraws the rod 23 from the path of the actuator 24. When the supply of weft becomes much reduced on the weft carrier IV, as indicated in Fig. 2, the slide 12 will still be moved forward by engagement of the fixed detector 14: with the weft carrier W and the rod 23 will be sufliciently withdrawn to clear the actuator 24.

If, however, the weft becomes entirely exhausted upon the portion of the weft carrod 19 and arm 20 and withdrawthe rod rier W engaged by the detecting mechanism, the detecting member 15 will then be free to turn upon its pivot 16, and the slight rearward movement of the slide 12 caused by engagement of the detector 1 1 with the weft carrier "W will not be effective to move the 23. The actuator 2d thereupon becomes operative to indicate a weft carrier transfer.

WVhenever it is desired to change the relative longitudinal position of the detecting members 14 and 15, this change is very easily effected by pulling forward the support 28 and adjusting the nut 31 as may be neces sary. This adjusting movement is a straight line movement longitudinally of the slide 12 and does not disturb the lateral relation of the pivoted detecting member 15, the stop rod 18 and the rod 19. Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed otherwise than as set forth in the claims but what I claim is z j 1. A weft detecting mechanism for looms comprising a movably mounted slide, a detecting member fixed to said slide, a pivoted move said support yieldingly rearward in said slide.

3. A weft detecting mechanismfor looms comprising a movably mounted slide, a detecting member fixed to said slide, a pivoted detecting member mounted adjacent thereto, a bearing for said pivoted detecting member, and means to adjust said bearing by a straight line movement longitudinally of said slide, while maintaining a fixed transverse position thereof.

L A weft detecting mechanism for looms comprising a movably mounted slide, a detecting member fixed to said slide, a pivoted detecting member mounted adjacent thereto, support for said pivoted detecting member mounted for yielding longitudinal movement in said slide, and means to adjustably limit rearward movement of said support in said slide.

5. A weft detecting mechanism for looms comprising a movably mounted slide, a detecting member fixed to said slide, a pivoted detecting member mounted adjacent thereto, a pivot stud for said pivoted detecting member, said stud extending loosely through .3

a longitudinal slot in said slide, and means to adjust said stud longitudinally in said slot.

6. A weft'detecting mechanism for looms comprising a movably mounted slide, a detecting member fixed to said slide, apivoted detecting member, a support for said pivoted detecting member mounted for longitud inal movement in said slide and-having a threaded front end portion, and an adjusting nut threaded on said end port-ion and engaging said slide.

7. A weft detecting mechanism for looms comprising a movably mounted slide, a detecting member fixed to said slide, a pivoted detecting member, a support for said pivoted detecting member mounted for longitudinal movement in said slide and having a threaded front end portlon, an ad ustmg nut threaded on said end portion and engaging said slide, and means to hold said nut in adjusted position.

In testimony whereof I have hereunto affixed my signature.

CHARLES Lnrnnvnn

Images