US1556809A - Warp stop mechanism for looms - Google Patents

Description

Oct. 13, 1925- M. L. STONE wmp s'roP rmcmmsnvon Looms Filed' April 15, 1925 2 Sheets-Sheet 1V l/llll'llll Oct 13, 1925' M. L. sToNE AWAR? STOP MECHNISI P OR LOOMS l Filed April 13, 1825 2 Sheets-Sheet 2 li ,n

Patented Get. 13, 1925,

UNITED S'iiiTESl PATE-NT OFFICE.

MnLvIN L. STONE, or LAWRENCE, MAssAonUsn'rTs-l, Assrsnon To nnAPnn oonieonn- TION, or HOPEDALE, MASSACHUSETTS, A CORPORATION or MAINE.

WAR? STOP MECHANISMI FOB LOOMS.

Application inea April 1a, 1925. serial No. 22,660.

To all whom t may concern 13e it known that I, MELVIN L. STONE, a citizen of the United States, and a resident of Lawrence, in the county of Essex and State of Massachusetts, have invented an Improvement in larp Stop Mechanisms tor Looms, of which the following description,

. in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invent-ion relates to warp stop mechanisms for looms and more particularly to that type wherein a detector having a detecting movement transversely to the series of drop wires is arrested when a drop wire tails to be supported by a warp thread.

It is now the common practice to support a series or row of drop wires by the warp threads during weaving, and to provide a detector which may be arrested in its detecting movement by one ot the drop wires when it tails to be supported by a warp thread, and thereupon eiect loom stoppage. In this general type of warp stop mechanisms, the drop wires are guided in their movements by drop wire guides or bars, and when a warp thread fails to support a drop wire and the loom is stopped, as indicated, it is desirable to locate the warp fault, in order that the broken end 'or too slack warp thread may be corrected.

One ot the objects ot the present invention is to provide a warp stop mechanism of the above general type with a drop Wire guide which is normally stationary during 'weaving but which is moved longitudinally or lengthwise by actuation ot theloom stopn ping means.

r to thereby locate the warp fault..

The invention and vnew combination ot parts will best be made clear 'from the tollowingdescription and the accompanying drawings of one good form thereof.

In the drawings: Fig. 1 is a perspective view ot' a loom equipped with the present invention;

Fig.'2 is a cross-section through the main parts of the Warp stop mechanism, showing more particularly the detector or vibrator and the relation of the drop wires thereto during normal weaving operations;

Fig. 3 is an enlarged transverse section of the main portions of the warp stop mechanism, showing a fallen drop wire displaced laterally or transversely of the loom when the stopping mechanism is itself actuated to stop the loom.

The advantages and results secured by the present invention are best manifested in a warp stop mechanism of the general type shown and described in the patent to Carl I). Brown, No. 1,362,670, dated December 21, 1920, and in the present embodiment ot the invention it is shown associated with such a warp stop mechanism, althoughobviously, the invention may be associated withother forms of stopping means.

The` loom vtrame 1 may be of usual construction, having the usual lay 2 which is provided with a bunter 3. The shipper 4 is normally held in runningposition for the loom by a shoulder 5 on the shipper stand, and pivotally supported on the loom trame at 6 is a shipper knock-oit, comprising an arm 7 which bears against the shipper to eiect loom stoppage when the knock-oli' is actuated.

Mounted in a suitable bearing 8 and supported by an arm 9 connected to the loom trame isa rock shaft 10` having secured thereto the governo-r 11, andmounted for rocking and sliding movement is a dog or fish-tail 12 associated with a knock-off head 13 having a slot 111 into `which projects the pin 15 extending `trom the dog 12. The knock-off head 13 is provided with a`slot 16 which embraces the shaft 10, the construction being such that should the dog 12 be moved rearward by the bunter 3, the knockoff head 13 would likewise be moved rearward in the persent insta-nce, and through a connecting rod 17 joined` to the knock-off lever 7 effect loom stoppage.4

The shaft 10 is provided with an arm 18 which is connected by a rod 19 with a rocking armf20, normally actuated by the detector or vibrator during normal operation of the loom. In the present instance, the

arm 20is connected to a rock shaft 2l whichy has the arm-22 connected by a rod 23 with an arm 24, Fig. 1, secured to the detector shaft 25, so that on rocking movement of the detector shaft, the roel; shaft 1Q will be rocked and control the position ofthe dog 12.v

The detector shaft 25 maybe given its rocking or vibrating movement through any suitable means, andras shown, it is soactuated bya rod 26 which .extends downwardly and is 'actuated' from a collar on a lower or cam shaft, as more fully shown and de.- scribed-in the patent tofiown, `above men'- tioned. I

The detector shaft has rising therefrom the detector supporting arms 2K7 on'which 1s mountedthe dete'ctor28,l Figs. 21and 3. The parts-se described may be conveniently and' advantageously formed and associated as more fully` shown andv described inthe Carl D. Brown patenti A Mounted upon the loein frame, one at each-side thereof, arethesupports 29for the main' portions ofthe warpstopmechanism, and to the supports' 29 are adjustably sev cured the side framesy 30which are shown provided with the extended-bifurcated lugs 31 resting upon the support-s 29,u andadjust ablysecured thereto by bolts Extending betweenfthe side frames 30 are the fixed warp suppoirtsf33, Figs. 1` and2, cach of which hasat'its lower portion a too.thed..strip 34:-betweeniwhich and the detector. 28a drop wire 35 may be engaged by the detector when they drop wire fails to besupported by a warp thread.

In the present instance of the invention, the. drop wires 35 are each, provided with an eye 36 through each of which extends a warp thread a normally resting on the top portion of the ixed bars 33 constitutedin the present .instance as warp supports.

The drop 'wires 35 may be variously contrived, but" in the present instanceeach is shown'provided with an elongated slot 37 through which extends the. drop wire guide 38, whereby the drop wires are guided or desde@ vin their incremente -In'the pre'sentfinventionj are shown two dropwire guides 38, butv obviously, any number 0f Such' 'guides may. @employed i171 accordance withth'enuinher of rows ofjdrop wires, and each of'theV drop wire guides 38 carries projections which are adapted to be engaged by a drop wire when it fails to besupported by a warp thread. The projections on the drop wire guides are preferably formed as teeth 39 having tapered end portions and extending upwardly from each of the drop wire guides, the construction being such that should a drop wire fail or be not supported by a warp thread, it will engage between the teeth or projections of the drop wire guide associated therewith.

In the general type of warp stop mechanism wherein the drop wires are associated with drop wire guides and a vibrating detector, the drop wire guides themselves are ordinarily iixed or secured to the side frames or supports 30, one at each side of the loom, but in accordance with the present invention the drop wire guides 38 are mounted in the side frames or supports 30 for lengthwise movement relative thereto and'may. be conveniently held in the guide,-

ways 40 by cap plates 41-.

During normal weaving operation, the drop'wire guides 3.8 are stationary and act solely as a meansfor guidingthe movement of the drop wires, but in accordance with the present invention the drop wire guides are associated with the stopping mechanism which when actuated or moved to stop the loom, impart to the drop wire guide or guides a movement thereof lengthwise or transversely of the loom, with the result that when the loom is stopped or arrested by the detector 28 underk the iniuence of a fallen drop wire and the lower end thereof is caught or held between the serrated edge portion ofthe fixed bars 34 and the detector, the upper end portion of the fallen drop wire will be moved laterally, as indicated in Fig. 3, to indicate the warp'fault.

In the present instance of the invention where-two'drop wire guides are shown, they are connectedor joined together at their proJectmg end portions' 42 by a bar 43 carried by afblock'44'havingfa pin 45 extending therefrom and engaged with a slot' 46 in a transversely movablearm 47 Fig. 1.

'I he arm 47 is carried by the shaft 48 which is conveniently held in a bearing 49 carried by a bracket 50 secured to the loom frame and is maintained in suitable relation to such bearingvby collars 5 1, one above and the other belowl the bearing 49.

Extending outwardly from one of the bearings `51 (the lower one in the present instance)` is a pin 52 which is engaged by a bifurcated end ofA a rocker 53 mounted on a roel: shaft- 54 supported in a bearing 55 carried by the loom frame. Iny the present instance, the arm 53 extends below the rock shaft 54 and is connected at 56 to an aetuating rod 57 which may be suitably guided for endwisemovement in the bearings 58 adjustably mounted on the loom frame, and the forward end of the rod 57 is positioned 'ien adjacent the rear end portion of the knockof head 13, as indicated in Fig. 1, the construction being such that should the head 13 be moved rearwardly by engagement of the dog 12 with the bunter 3 on the lay, the rod 57 will be likewise moved rearwardly to thereby turn the rock shaft 48 and impart to the connected drop wire guide or guides a lengthwise movement, whereby the fallen drop wire will be moved laterally, as indicated in Figs. 1 and 3, to indicate the warp fault.

During normal operation of the loom, the drop wire guides will remain fixed or stationary and afford means for directing the movement of the drop wires, but when a warp thread breaks or becomes too slack, the associated drop wire will fall into the path of movement of the detector 28 and thereby arrest movement of said detector and position the dog 12, through the train of mechanism described, for engagement by the bunter 3 on the lay as the latter moves backward, and loom stoppage will be effected. As the dog 12 is thus moved rearward by the bunter, the knock-off head 13 will likewise be so moved, and as the loom is stopped by such movement of the knockoif head, the rod 57 will be moved lengthwise to effect lengthwise movement of the associated drop wire guide or guides to move the top portion of such fallen drop wire laterally, as in Figs. 1 and 3, and thereby effectively locate the warp fault.

From the construction described it will be apparent that loom stoppage is effected by the detector 28, and upon movement of the stopping means to stopping position, the drop wire guide or guides will be moved lengthwise and locate the warp fault by movement of the upper end portion of the fallen drop wire laterally, while the lower end of the drop wire will be held clamped between the detector and the cooperating fixed bar 34.

That is claimed is:

1. In a warp stop mechanism for looms, the combination of a series of drop wires, a drop wire guide normally stationary during weaving and having projections for engaging a drop wire when it fails to be supported by a warp thread, a detector having a detecting movement transversely of the series of drop wires, loom stopping means for stopping the loom when the detector is arrested in its movement transverse to the series of drop wires, a push bar actuated by movement of the loom stopping means, a shaft connected to the drop wire guides and rocked by the push bar to impart warp fault locating movement to the drop wire guide.

2. In a warp stop mechanism for looms, the combination of a row of drop wires, a drop wire guide normally stationary during weaving, a vibrating detector below the drop wires, loom stopping meansincluding a dog rendered operative by lay movement to stop the loom when a drop wire arrests the detector, and connections between the dog and drop wire guide to impart warp fault locating movement to the drop wire guide by operative movement of the dog by the lay.

3. In a warp stop mechanism for looms, the combination of a row of drop wires, a ,dropv wire guide mounted for longitudinal movement and normally stationary during weaving, a vibrating detector below the drop wires, loom stopping means rendered operative to stop the loom when a drop wire arrests the detector, a rock shaft connected to the drop wire guide and connections between the loom stopping means and rock shaft to impart warp fault locating movement to the drop wire guide by operative movement of the roclr shaft by the loom stopping means. j

t. In a` warp stop mechanism for looms, the combination of a series of drop wires, a normally stationary drop wire guide, a detector having a detecting movement, a dog positioned for engagement by the lay to stop the loom when the detector is arrested by a drop wir-e, a rock shaft mounted for rocking movement adjacent the warp stop mechanism, and connected to the drop wire guide, and a rod between the rock shaft and-dog for imparting movement to the drop wire guide by lay movement of the dog.

5. In a warp stop mechanism for looms, the combination of a series of drop wires, a drop wire guide, a vibrating detector movable transversely of the seri-es of drop wires, a fixed bar against which the detector holds a drop wire when it fails to be supported by a warp thread and the detector is arrested, a loom stopping dog adapted to be engaged and moved lengthwise by the lay when the detector is arrested by a drop wire, a rod adapted to be moved by lay induced movement of the dog, and means between the dog and drop wire guide' for moving the drop wire guide lengthwise when the dog is moved lengthwise to thereby locate the warp fault.

6. In a warp stop mechanism for looms, the combination of a series of drop wires, a drop wire guide, a detector having a detecting movement, loom stopping means including` a dog, the lay having a bunter, connections between the dog and detector for operatively positioning the dog for engagement by the bunter when the detector is arrested by a drop wire, and means actuated by the dog when moved by the bunter to displace the drop wire guide and locate the warp fault.

7. In a warp stop mechanism, the combination of a series of drop wires, a drop wire guide having teeth to engage a drop' Wire, a detectoi` having a detecting movement, the lay having a bunter, stopping means including'a dog controlled by the detectoi` and positioned for movement/by the bunter when the detectoi` is arrested, and means actuated by movement of the dog for imparting lengthwise movement to the drop Wire guide to locate the fallen drop Wire.

8. In a drop Wire mechanism for looms, the combination of the lay having a bunter,

drop Wires, a drop Wiiefguide, a detector 15 for controlling the dog, and means actuated by the dog` for moving the drop Wire guide to locate the Warp fault.

In testimony whereof I have signed my name to this specification.

MELvIN L. STONE.

Images