US1807739A - Protector mechanism for narrow ware looms - Google Patents

Description

June 2, 1931. E. R. HOLMES ,7 i

PROTECTOR MECHANISII FOR NARROW WARE LOOMS Filed May 17, 1930 2 Sheets-Sheet 1 A 7TUR/VE Y5 Patented June 2, 1931 UNITED STATES PATENT OFFICE ELBRIDGE R. HOLMES, F WORCESTER, MASSACHUSETTS, ASSIGNOR T0 CROMPTON & KNOWLES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS PROTECTOR MECHANISM FOR NARROW WARE LOOMS Application filed May 17,

This invention relates to narrow ware looms in which a plurality of shuttles are moved b a single actuating member.

In suci looms, a shuttle sometimes sticks in its guideways or is otherwise blocked or held from movement, and injury to the shuttle or to the actuating mechanism commonly follows.

It is the general object of my invention to provide a construction by which the actuating mechanism will be promptly disconnected in case the normal movement of the shuttle is interrupted. By such provision, all chance of injury to the shuttles or other damage to the loom is effectively avoided.

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

A preferred form of the invention is shown in the drawings, in which Fig. 1 is a partial front elevation of a narrow ware loom, with certain parts shown in section;

Fig. 2 is an enlarged front elevation of the shuttle-actuating mechanism;

Fig. 3 is an end View, looking in the direction of the arrow 3 in Fig. 2;

Fig. 4 is an enlarged front elevation of the giveway connection;

Fig. 5 is a perspective view of the parts forming the giveway connection;

Fig. 6 is a sectional plan view, taken along the line 66 in Fig. 2; and

Fig. 7 is a view similar to Fig. 4 but showing the parts in a different position.

Referring particularly to Fig. 1, I have shown parts of a narrow ware loom including a lay 10 pivotally mounted in a loom frame 11 and oscillating about the axis of supporting bearings 12 and 13. A rack bar 14 is mounted for reciprocating movement in the lay 10 and actuates a series of pinions 15 by which the narrow ware shuttles (not shown) are moved back and forth lengthwise of the lay 10. The ends of the rack bar 14 are connected to chains 16 passing around upper guide pulleys 17 and secured to lower sprockets 18.

A second sprocket 19 is secured to each 1930. Serial No. 453,369.

sprocket 18 and the associated sprockets roslidable on a fixed guide rod 31 and is pro-' vided with vertical flanges 32 on its rear face forming a guidway to receive a crankpin 33 on a continuously rotating crank arm 34. The crank arm 34 is mounted on a crankshaft 35 which may be connected by bevel gears 36 to the usual bottom shaft 37 of the loom. As the shaft 35 is rotated, the crankpin 33 will move up and down in the guideway between the flanges 32 and will reciprocate the frame 30 on the guide rod 31.

All of the parts thus far described areof the usual construction and in themselves form .no part of my present invention, which relates more particularly to the mechanism for connecting the sliding frame 30 to the pull 'rod 25.

For this purpose, a recessed or U-shaped block 40 (Fig.7) is mounted on the rod 25 andis secured in axially adjusted position thereon by lock nuts 41 (Fig. 4). The'frame 30 has a forward projection or abutment 42 positioned below theblock 40 and having a semi-circular recess 43 in its upper face.

A displaceable connecting member is in terposed between the block 40 and the abutment 42. This connecting member comprises two separate elements 45 and 46, hinged together at theiradjacent ends by a cross-pin 47. These adjacent ends are shaped to provide a rounded surface closely fitting'the re- 'side edges 51 of the member 46 when the members 45 and 46 are folded together to their limiting position, as indicated in Fig. 7. A cross slide (Fig. 2) is mounted in guideways 62 (Fig. 6) in the sliding frame 30. A coil spring 64 is mounted on arod 65, the lower end of which is secured in a lug 66 formed at the upper end of the cross slide 60. The upper end of the rod slides freely in aguide opening in the upper part of the sliding frame 30.

The. spring 64 engages nuts 67 on the stud 65 and acts to push the beveled foot portion 70 of the slide 60 against the top surface of the block 40. Such downward movement is resisted by the elements 45 and 46 of the connecting member and these elements are thus firmly seated at their lower ends in the recess 43 and at their upper ends in the U- shaped block 40, the position of the parts being as shown in full hues in Fig. 4.

During the normal operation of the loom, the parts remain in this assembled relation and the pull rod 25 is moved back and forth, causing corresponding movement of the rack 14 and the shuttles associated therewith.

If the movement of the shuttles is interrupted, so that the pull rod 25 cannot follow the movements of the frame 30, the continued movement of the frame, as in the direction of the arrow a in Fig. 7, causes the connect ing member to rock about its bearing 48 on the abutment 42 to the position indicated in Fig. 7 (and also in dotted lines in Fig. 4).

As the movement of the frame 30 continues still further in the direction of the arrow a, the connecting member formed of the parts 45 and 46 will be further displaced from the recess 43 by the rolling or cam action of the connecting member on the abutment 42.

lVhen the relative movement of the frame 30 has reached a certain point, the connecting member is forced entirely off of the abutment 42 and falls to the floor, thus leaving the block 40 entirely disconnected from its actuating mechanism. The frame 30 may continue to reciprocate but no motion will be communicated to the pull rod 25 and there will be no further actuation of the shuttles until the connecting member is replaced between the block 40 and the abutment 42.

I have thus provided an efiicient and reliable connection for normal operation, so de signed that it will yield under abnormal conditions and will entirely disable the actuating mechanism until manually restored to operative position by the operator.

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 1. In a narrow ware loom, a driving member for a plurality of shuttles, actuating mechanism for said member, and a giveway connection between said actuating mechanism and said member, said giveway connection comprising a connecting member positioned between portions of said driving member and said actuating mechanism, and said connecting member being bodily displaceable by abnormal actuating pressure thereon.

2. In a narrow ware loom, a driving member for a plurality of shuttles, actuating mechanism for said member, said driving member comprising a recessed connecting block and said actuating mechanism comprising a recessed abutment, a connecting member formed of two pieces hinged together and having their hinged ends seated in the recess of said abutment and their free ends engaging the ends of the recess in said connecting block, and spring means effective to press said connecting block and said connecting member against said abutment.

8. The combination in a narrow ware loom as set forth in claim 2, in which the two pieces of said connecting member are provided with abutting portions limiting swinging movement of said parts toward each other in one direction.

4. In a narrow ware loom, a driving member for a plurality of shuttles, actuating mechanism for said member, and a giveway connection mounted on said actuating mechanism and engaging said driving member, said connection being yieldingly held in normal operative position and being movable to inoperative position with a rolling action when movement of said driving member is obstructed.

In testimony whereof I have hereunto affixed my signature.

ELBRIDGE R. HOLMES.

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