US1265112A - Warp stop-motion. - Google Patents

Description

J. REGAN.

WARP STOP MOTION.

APPLICATION mm mm. 19w.

Patented May 7, 1918.

2 SHEETS-*SHEET I.

J. REGAN.

WARP STOP MOTION.

APPLICATION HLED APR. 6. 191?.

Patented May 7, 1918.

2 SHEETSSHEET 2- UNITED STATES'PATENT OFFICE.

JOHN REG-LN, OF NEW BEDFORD, MASSACHUSETTS, ASSIGNOR TO CROHP'IOH & KNOWLES LOOK WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHU- BETTE.

WARP STOP-MOTION.

Specification of Letters Patent.

Patented May 7, 1918.

Application filed April 6, 1917. Serial No. 160,276.

To all whom it may concern:

Be it known that I, JOHN REGAN, a citizen of the United States, residing at New Bedford, in the county of Bristol and State of Massachusetts, have invented a new and useful Warp Stop-Motion, of which the following is a speci cation.

This invention relates to a Warp stop motion of the type in-which a fallen dro wire renders certain mechanical devices e fective to stop the loom.

Warpstop motions of this general type are in very common use and as usually built comprise a vibrator bar having an oscillating movement beneath the drop wires. The vi rator is mounted to swing as close as possible to a second bar fixed to the frame of the sto motion. When a drop wire is released y the breaking of a war thread it falls between the vibrator bar an the second or fixed bar, and thus prevents movement of the vibrator bar past and beneath the fixed bar. 'Such interference with the free movement of the vibrator bar causes the stopping of the loom. For coarse work the results i are reasonably satisfactory, but on very fine work for which the drop wires are necessarily made of extremely thin stock it is found that a stop motion of this type must be made with extreme accuracy in order to be reliable. Unless the vibrator bar swings as close as possible beneath the fixed bar, the very thin and flexible drop wires will bend and slip between the vibrator and the fixed bar without stoppin the loom. a

It is the general 0 ject of my invention to avoid such necessity for extreme accuracy by providing a warp stop motion in which the loom stopping mechanism is rendered eflective by the direct cooperation of a fallen dro wire with an actuator, preferably exten ing through an opening in the drop wire, such coiiperation being independent of'the relation of the actuator to any other part of the stop motion.

In the preferred form of my invention the opening in the drop wire is formed with wide and narrow portions, and the actuator is in the form of a rod of non-circular cross section extending through the openings in the drop wires and normally oscillating freely therein. Upon the falling of 'a drop of the opening in the fallen wire engages 'vided with an rod. and its oscillation is thereby prevented. This construction is found to be extremely reliable in operation and does not require any special accuracy in the making of the parts of the stop motion.

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

A pre erred form of my invention is shown in the drawings, in which- Figure 1 is an end elevation of my improved stop motion;

Fig. 2 is a partial front elevation of the parts shown in Fig. 1 v

Figs. 3 and 4 are diagrammatic end elevations showing the operation of the parts under different conditions;

Fig. 5 shows the relative position of the drop wire and actuator under normal conditions, and

Fig. 6 shows the relative position which the drop wire and actuator assume upon the breaking of a warp thread.

In Figs. 1 and 2 I have shown the operative end of a warp stop motion, including the mechanism for angular] tor rods. mounted upon a frame 10 adjustab'ly secured to a rod 11 fixed to the loom side (not shown). The frame 10 is connected by bars 12 to a similar frame at the opposite side of the loom. The bars" 12 are separated sufficiently to permit the drop wires 13 to swing freely between them, the stop motion shown in the drawings being arranged with two sets or banks of wires 13 and requiring three bars 12.

The wires 13 may be of. different welllmown styles in accordance with the particular class ofgoods upon which they are to be used, the wire shown in the drawing being slotted at its lower end and being proopening 14 in its upper end y moving the actuaformed with a wide row portion 14.

Each bank of wires 13 cooperates with an actuating rod 15 which extends through the wide portion 14 of the drop wires when they are 1n normal position. The rod 15 is of non-circular cross section and each end of the rod is referably supportedin a circular bearing block 16. The block 16 at the operative end of the stop motion shown in portion 14 and a nar- The actuating mechanism is left to the between the sides 0 stud 24 fixed pivot Figs. 1 and 2 is provided with a downwardly extending arm 17 having a stud or promotion 18 at its lower end. a The bearing blocks 16 are secured in position by a plate 20 (Fig. 1) pivoted at 21 to the frame 10 and being normally positioned by a stop 22 so that the lower pprtion of t e plate 20 covers the bearing locks 16, retaining them in the frame 10 and reventing the longitudinal removal or disp acement of the rods 15. When it is desired to remove either of the actuatinglrods the plate 20 is swung u ward and to t e right in Fig. 1 to uncover t e ends of the rods.

A link 23 is mounted on the studs 18 at the lower ends of the arms 17, said link be ng itself provided with a stud 24 extendm outwardly into position to engage a slotte lever 25. The lever 25 is pivoted on a stu 26 carried by an arm 27 which in turn swings on a pivot 28 fixed to the frame 10. he lever 25 extends upwardly beyond the stud 26 and at its upper end is provided with a stud 30 upon w link 31 through anism iscontro e 7 Thcarm 2'1 is regularly oscillated through an actuating link 32 by which the arm is connected to actuating mechanism not shown. The arm 27 also supports a spring plunger 83 engaging the lever 25 and b which the lever is r tained yieldingly-"in he position shown in Fig. 1. For a complete description of the actuating mechanism, reference is made to the patent to'Wyman, No. 665,713, issued January 8, 1901.

Under normal conditions the slotted lever 25 moves in unison with the arm the ivot 28 as a center, swinging t e link 23, t e studs 18 and arms dotted line ositions shown in Fi 3, and thereby osci ating the actuator ro' s 15 about the axes of the circular bear-' ing blocks 16. This free oscillation of the actuator rods will continue so long ast e wires are in the ra' position shown in Fig. 5. p a a When one of the warp threads breaks the corresponding drop wire fallsto the position Fig. 6, en the actuator the narrow portion 14" of the opening: en position, furt er oscillation of the rod becomes impossible and accordingly 17, the studs 18 and link 23 are sition shown in Fig. 4, thus causing the on the link 23 to act thereafter as a for the slotted lever 25, which thereafter swings about the pivot 24 moves the link 31 to the right or left to one of the dotted line ositions shown in 4. Such movement ofthis link in either 1- rection places th eld in the e knock-ofi mechanism in operation to stop the loom.

While the angular movement of the actuw 27 about V freely movable therein, 17 to the right and the wire is in this the arms tor is herein shown as an oscillatory movement, my invention is not limited to any particular form 0 an lar -movement, as a continuous or intermittent angular movement in a, single direction is equa y adapted to the purposes herein described.

Having thus described my invention the simplicity and advantages thereof will be apparent. It will be particularly noted that the-loom is stopped direct coiiperation of the fallen drop wire with the actuator rod, and that it is not dependent in any way upon the relative position or adjustment of other parts. It will be also noted that the cross section vof the rod '15 may be varied as desired provided only hat a non-circular cross section be' used.

It should be noted 4 above the warp threads while is not essential. With certain oods the opening 14 and actuator rods 15 will preferably be at the upper end of the dro wires an above the-warp, as

while with difierent be found desirable position the actuator rods below the warp threads.

It will be also evident that other changes and modifications can be made in my 1111- proved stopmotion without departing 50m the spirit and scope oi 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- 1. A we stop nation, a p urality ing an opening therein, an actuator extending through said openings and normally means to give said actuator operative oscillatory movements in two directions, and means to stop the loom when the movement of said actuator in either direction is prevented, each drop wire when unsupported by a-warp thread being effective to prevent movement of said aci ii i 1 warp s motion comprisin a p urality of, drop wii'es each g having an opening therein formed with wide and narrow portions metrically disposed, an actuator of non-circular cross section extending through said openings at the wide portion when t e drop wires are in normal osition, said tuator being freely mova la in said iwid portion of said openin but being he rommovementwhenint enarrow port the openi-n in a fallen drop wire by engagement with the two opposed sides of the openin at said narrow portion, means to move said actuator, and means to stop the loom when the movement of said actuator is prevented.

3. A warp stop motion comprising a plurality of drop wires each having an opening therein-with a wide lower portion and a narthat the location of the A row upper portion symmetrically disposed, permitting such removal when said device a sing erod of non-clrcnlar cross section exis moved rom normal position. tendin freely through said wide lower por- 5. A warp stop motion comprising drop tion 01 said openings when the wires are in wires arranged in a plurality of sets, eac

5 normal position, means to oscillate said rod drop wire having an irre lar opening 25 continuously, said rod being free to osciltherein, an actuator rod 0 non-circular late when in said wide portion but being cross section extending through the openheld by the drop wire from movement in ings in each set of drop wires, circular beareither direction when in the narrow portion ing blocks for each actuator rod, bearin 0 of the opening in a fallen drop wire, and for said blocks, arms connected to sald 30 means to stop the loom when said rod is blocks, a link connecting said arms, and acheld from oscillation. tuating mechanism for moving said link,

4. A warp stop motion comprising an 110- said rods and link being held from movetuator rod of non-circular cross section, oirment by a fallen drop wire and said actuat- 15 cnlar bearing blocks supportin the ends of ing mechanism being thereby rendered ef- 35 said rod, bearings for said b ocks, means fective to stop the loom. connected to one of said blocks to oscillate In testimony whereof I have hereunto afsaid blocks and rod, and a movable device fixed my signature. :efiective to normall nevent longitudinal 2o removal of said rod 111 said blocks but JOHN REGAN.

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