US1652591A - Warp stop motion - Google Patents

Description

Dec. 13, 1927.

l. H. VERRY WARP STOP MOTION Filed June 11, 1926 Q .EH v WV a m j filmu l ln Patented Dec. 13, 1927.

UNITED STATES PATENT OFFICE.

IRVING H. VERRY, or WORCESTER, MASSACHUSETTS, ASSIGNOR T CROMBTON & KNOWLES LOOM woRKs, or WORCESTER, MASSACHUSETTS, A CO PORATION OF massacnusnrcrs.

Application filed June 11,

This invention relates to warp stop motions for loom-s and it is the-principal object of the invention to provide a simple means to detect the location of a warp fault.

Varp stop motions generally comprise a large number of thin so-called drop wires each of which is supported on a warp thread of the loom and there is usually provided some form of oscillating detector rod which under normal conditions is free to move but which is arrested by a fallen drop wire when the corresponding thread is broken or becomes slack. l/Vhen there are a large number of these drop wires it is a difficult mat ter to locate the warp fault and it is a further object of my invention to provide readily accessible means for moving the detector rods so as to produce a. slight deformation of the fallen drop wire to the end that the same will be twisted laterally to disturb the neighboring drop wires and thus indicate the location of the warp fault.

My invention relates more particularly to the style of motion set forth in Patent No. 1,360,638 wherein there is disclosed a plurality of noncircular oscillating detector rods passing through slots in the upper ends of the drop wires. The detectors are oscillated through a spring actuated device. and when one of the drop wires falls the narrow portion of the slot surrounds the rod and prevents oscillation thereof, this resultbeing accompanied by stopping of the loom. It is a more particular object of my invention to oscillate the detector rods about their axes so'that slight twisting of the drop wires will disturb adjacent drop wires.

It is a still further object of my invention to operate my device in connection with a usual partof the warp stop motion, the control being manual and being independent of the ordinary automatic actuation of the motion by the loom. By the use of my invention it is possible for a weaver to determine the location of the broken warp thread without touching any mechanical part of the loom such as would ordinarily be oiled. The practical result of this is that the weavers hands will not be soiled and there will be no danger of oil coming in contact with the warp threads from the operators hands. It is a further object of the invention to provide a flexible cord or cable the forward end of which is provided with a handle readily WARE STOP MOTION.

1926. Serial No. 115,358.

transversely of the detector rods and looking P in the same general direction as the corresponding parts in Fig. 1,

Fig. 3 is a fragmentary view in the direction of arrow 3, Fig.

Fig. 1 is a rear elevation of a portion of the drop wires and detector rods showing the action of the twisted fallen drop wire in indicating the location of the warp fault, and

Fig. 5 is a detail rear elevation of portion of the warp stop motion.

Referring to Fig. l, I have shown a loomside on which one end of the usual bottom or cam shaft 11 is mounted ina bearing 12, said shaft being provided with a cam 13 to cooperate with a shoe 14 formed on lever 15 pivoted at 16 to the loomside 10. A link 17 is connected as at 18 to the rear end of the lever 15. The upper end of'the link 17fis pivoted as at 19 to an arm 20 loosely mounted on a stud 21 fixed in an end member 22 forming part of the stop motion.

I The end member 22 is adjustably secured on an L-shaped rod .23 one end of which is adjustable in a. member 24 as set forth in the aforesaid patent. The opposite end of the stop motion is similarly supported so as to provide for various adjustments of the end members 22 with respect to the loom.

Detecting rods 26 .of non-circular crosssection extend throughthe openings 27 in drop wires 28, said openings being of sufficient width in their lower portions to permit oscillation of the detectingrods 26 therein but being narrow intheir upper portions so that a fallen drop wire engages the detectors and prevents oscillation thereof. The detector rods 26 are rotatably supported in the end members 22.

The rear end of lever is provided with a stud 29 through which extends one end of a Ushaped rod 30 one end of which is connected as at 81 to an upwardly and rearwardly extending arm 33 of a lever 3 L pivoted on the end member 22 as shown in Figs. 1 and 5. There are several of said levers 341, one for each detector rod 26, and they are connected together by a link 35. Collar 36 is secured to the long side of the rod 30 to limit the lower end of the compression spring 37 which surrounds said rod and presses against the stud 29. Knock-off lever 38 is also pivoted on the stud 21 and is connected to a knock-off rod 39 effective to stop the loom.

Under normal operation with the bottom shaft 11 rotating the cam 13, lever 15, link 17, and lever 20 serve to move the upper end of the sorin 37 downwardl b stud l e y y 29. The levers 0:: therefore rock to oscillate the rods 26, the latter belng un1nterrupted as all the drop wires are held in raised position. Nhen a warp fault occurs, however, either through a broken or slackened thread the corresponding drop wire 28 will fall to some such a position as indicated at the left of Fig. 2, arresting oscillation of the associated detector 26 and as the lever 20 is raised the spring 37 will be compressed without giving the usual downward movement to the rod 30. By means of intermediate mechanism, not shown but clearly set forth in the aforesaid patent, the knock-off lever 38 will be moved to the left to produce a 'lrnocking'off movement of the rod 39. The

- matter thus far described is of common construction and may be constructed and operated as set forth in said patent.

My improvements relate more particularly to the construction of a device for manually oscillating the detector rods independently of the cam 13 and in carrying out my invention I pivot a lever to one of the sides of the loom as at 51 and project laterally therefrom a lifter finger 52 extending under lever 20 and operatively connected to the rear end of a flexible cord or cable 53 by a hook 54 on the cable which engages a pin 55 carried by the finger 52; The cable 53 is led over stationaryguides 56 to the front part of the loom and is provided at the forward end thereof with a handle 57 Under normal conditions finger 52 is out of en gagement with the lever 20, the auxiliary lever 50 resting 011 a supporting pin 58 se cured to the loomside. g

When a Warp fault occurs, as previously described, one of the drop wires 28 will fall so that the narrow partof the slot thereof will receive one of the detectors 26. The weaver may then pull down handle 57, moving the same to the dotted line position,

thus raising the lever 20 to the dotted line position indicated in Fig. 1. The result of this is to compress spring 87 and cause increased turning pressure on all of the detectors 16. As a consequence the fallen drop wire will be deformed somewhat being forced against one of the guide bars 59 and twisted to some such position as indicated in Fig. 1, to move the neighboring drop wires and thus indicate the location of the warp fault. The raising movement of lever 20 by the handle 57 is made possible because lever 15 cooperates with a face cam and is therefore free to be lifted from the cam independently of the position of the latter. The weight of auxiliary lever 50 is such that the handle will be raised to the full line position indicated in Fig. 1 when released by the weaver, thus returning the finger 52 to its'lowerinost posi tion where it will not interfere with the normal automatic operation of the warp stop mot-ion.

From theforegoing it will be seen that I have provided a very simple device manually operable by the weaver to indicate the location of a fallen drop wire, said device operating independently of the ordinary actuating mechanism for the warp stop motion and being normally out of contact with the latter so as not to interfere with the proper operation thereof. It will further be noted that the devicev cooperates, with one of the normally moving parts of the stop motion and is so constructed as to be applicable to stop motions at present in use inasmuch as no change is made in the warp stop 1110131011 proper.

Having thus describedmy invention it will be apparent that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention, and I do not wish to be limited to the details herein disclosed but what'll claim is:

1. In a warp stop motion for looms having a bank of drop wires, a guide for the drop wires, a regularly moving detector member to be engaged by a fallen drop wire, regularly moving means to give said detector member an oscillating movement, and an auxiliary manually controlled device ind pendent of the means to give the detector the same character of motion it normally receives from the means to twist a fallen drop wire against the guide to bend a portion thereof laterally against the neighboring drop wires,

2. In a warp stop motion for looms having a bank of drop wires, a guide for the drop wires, an oscillating detector to cooperate with the drop wires, means to give the detector a regularly oscillating movement, and an auxiliary device independent ofand normally disconnected from the warp stop motion and manually operable to impart to the detector rod the same character of motion said detector rod normally receives from the means, whereby the latter will move a fallen drop wire against the guide to deflect the same laterally and disturb the position of ad jacent drop wires.

3. In a warp stop motion for looms having a bank of drop wires, a guide for the drop wires, an oscillating detector rod to cooperate with the banl: of drop wires, loom actuated means to give the roda regular oscillation, said means including a reciprocating lever operated by a face cam, and manually operable means to move the lever independent of the face cam to give the detector rod the same character of motion it normally receives from the means to move a portion of fallen drop wire against the guide to cause deflection thereof to disturb the drop wires adjacent the fallen drop wire.

l. In a warp stop motion for looms having a bank of drop wires, a guide for the drop wires, an oscillating detector rod, a regularly moving face cam, a cam lever there for, a driven lever, operative connections be tween the levers, operative connections be tween the driven lever and the detector rod to cause the latter to oscillate when the driven lever moves, and manually operable means cooperating with one of said levers to cause movement of the driven lever, such movement giving the detector rod the same character of movement it normally receives from the means to move a fallen drop wire against the guide and cause deformation of the fallen drop wire to disturb adjacent drop wires.

5. In a loom warp stop motion comprising a plurality of banks of drop wires, an oscillating detector rod for each bank passing through openings formed in the drop wires, means to connect said detector rods operatively together, a regularly moving lever to actuate all of said rods and give the same an oscillating movement when said lever is vibrated, loom operated means to give the lever a regular vibration, a guide for the drop wires, and manually controlled means to give said lever a vibration independent of the loom actuated means whereby when said manually controlled means is operated one of the detector rods will engage a fallen drop wire and twist the same against the guide to cause lateral movement of a portion of the fallen drop wire with resultant disturbance of adjacent drop wires.

In testimony whereof I have hereunto atfixed my signature.

IRVING H. VERRY.

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