US2383931A - Stopping means for looms - Google Patents

Description

Sept. 4, 1945. c 1 BROWN 2,383,931

STOPPING MEANS FOR LOOMS Filed Oct. 28, 1944 2 Sheets-Sheet l l/E/V 727E.

CARL 0 BRUW/v 5r r ATTURA/EY.

Sept. 4, 1945. c. D. BROWN STOPPING MEANS FOR LOOMS Filed 001;. 28, 1944 2 Sheets-Sheet 2 EARL 7 BRUWA/ A 7 TUNA/EX Patented Sept. 4, 1945 STOPPING MEANS For: LOOMS Carl D. Brown, Hopedale, Masa, assignor to Draper Corporation, Hoped'ale, Mass., a corporation of Maine Application October 28, 1944, Serial No. 560,805

\ 4 Claims. (01. 139 377 )2 The present invention relates generally to stop motions for automatic filling replenishing looms and, as illustrated herein, relates more particularly to stop motions for such looms which are conditioned for operation to stop the loom through the usual warp stop motion upon filling failure.

It is usual practice to provide means for stopping the loom when there is a filling failure due, for example, to filling breakage. Detection of such failure takes place in many instances at the fillin'g replenishing side of the loom and stopping of the loom is usually accomplished through a filling fork feeler mechanism which operates through connections to the other side ofthe loom to move the shipper handle out of holding position and into stopping position to disengage the clutch and thus stop the loom.-Such connections, however, are objectionable because of the number of parts and the consequent lost motion.

One object of the present invention is to provide stopping means for a loom by the use of which the filling fork slide will operate substantially directly to condition the parts to stop the loom. To

this end and in accordance with one feature of the invention, the filling fork slide is provided with means for moving a stopping member into stopping position. As illustrated, the filling fork slide is provided with a cam surface arranged to bear against a spring pressed plunger on one end of a Bowden wire having its other end arranged below a knock-off finger of the usual mechanical warp stop motion and which will move said knock-off finger into position when the filling fork slide is moved upon the occurrence of filling failure. Thus, a simple and effective means is provided for stopping the loom within a minimum number of mechanical connections.

With the above and other objects and features in view, the invention will now be described with particular reference to the accompanying drawings in which:

Fig. 1 is a perspective View of the right hand side of a loom in which the present invention is embodieo;

Fig. 2 is a similar view of the left hand side of the loom showing the knock-01f mechanism; and

Fig. 3 is a detail view, partly in section, of the knock-off mechanism.

The entire loom is not shown in the drawings since the parts not shown are of usual construction. The construction and operation of the warp stop motion to which the present invention is applied is clearly described and claimed in United States Letters Patent No. 1,538,625 issued May 19, 192 5, in the names of H. A. Davis and Arthur S. Johnson to which reference may be had for a description of those parts thereof which are not shown or described herein.

The drawings show a filling fork ill of usual construction which is arranged to be engaged by the filling to prevent operative connection between the fork and the usual filling feeler slide [2, thereby preventing forward movement of the filling slide and actuation of connections to the usual shipper handle of the loom.

The filling fork l is pivotally supported in the rear end portion of the filling feeler slide I2. The fork I0 is arranged to be tilted by engagement with the filling after the shuttle is picked into the right hand shuttle box 14 on the lay and thus raise the wire loop I6 so that it will not engage a hook l8 pivoted to the upper end portion of a filling motion lever 20. The filling motion lever is pivoted at 22 to the 100m frame and at its rear end engages or rests on a cam member 24. Th filling motion lever 20 and the cam member 24 are of usual construction and operate to re ciprocate the hook I8 during alternate picks of the shuttle or, in other words, when the shuttle is in the right hand shuttle box l4. If the filling is broken, the tines of the filling fork III will meet no resistance as the tines pass between the bars of the grate 26 on the forwardly moving lay. As a result, the loop IE will engage the hook I8 and, when the filling motion lever 20 is rocked by the cam member 24, the filling feeler slide I2 will be moved forwardly to operate the loom stopping mechanism.

The forward end of the filling feeler slide I2 is provided with an inclined surface 28 which is arranged to engage and move a plunger 30 secured to one end of a Bowden wire fixed to the breast beam 32 of the loom by a supporting clip 34. The wire is enclosed in a flexible conduit 35 and extends along the breast beam 32 to the left hand side of the loom where it is secured to the side frame 38 by a tubular member 40. The wire enclosed in the flexible conduit 36 then extends rearwardly to knock-off mechanism 42.

The knock-off mechanism is substantially the same as that disclosed in the above-mentioned patent to Davis et a1., and includes a bracket 44 fixed in any suitable manner to the left hand side frame 38 of the loom. The bracket 44 is provided with an upwardly extending portion 46 having an opening therein for receiving a bushing 48 in which a plunger 50 is arranged to reciprocate. The plunger 50 is hollow and is arranged to receive the Bowden wire in the conduit 36 from asaaosi mechanicalwarpstopmechanismattherearoi the loom. The bracket II is provided with an upwardly extending proiection it which enters theslot formed in the knock rod end It and -servestoguidethetodendl6andtherodllas it is oscillated during knock on and in starting the loom.

The knock off rod end This pivotally mounted in the slot therein a knock off 60 pivotedin the rear end portion of rod end 56 and normally" urged downwardl by a compression spring 82.

The forward end of the knock-off rod 58 is pro vided with a coupling 66 having a slot for receiving a pin, or stud 68. fixed to the shipper handle ll. Thus, rearward movement of the knock-off rod 58 will causethe shipper handle II to be moved from its forward running position to its rear "stop" position. During this rearward movement of.the shipper handle III, the

usual clutch mechanism of the loom will be released and the usual brake mechanism energized to stop the loom.

The construction and operation of the various elements has been described in detail, but it may be well for a clearer understanding of the invention to review briefly the operation of the device. when the shuttle has been picked out of the left hand box and has been properly boxed in the right hand shuttle box II, the lay will continue its forward movement and the tines of the filling fork III will engage the filling between the shuttle and the selvage of the cloth being woven. The fork ill will tilt and thus the loop it will not engage the hook it. On the other hand, if there has been filling failure, the tines of the fork Ill will pass between the bars of the grate 26 and when the filling feeler lever is rocked clockwise by'the cam 24, the hook it will engage the loop It and pull the filling feeler slide l2 forwardly. The cam surface on the forward end of the slide will force the plunger 30 toward the left, as viewed in Fig. 1. knock-oil it into the path of movement of the hunter 4 and the loom will be stopped as described above. It is evident that the above construction operates eflectively and without appreciablelost motion to stop the loom.

of said slide.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United'states is:

1. In a loom, means operated upon warp failure to stop the loom, a filling fork arranged to be tilted upon engagement with the filling, a slide on which the fork is pivoted, aloop on said fork, means having a projection thereon arranged to be engaged by said loop upon'filling failure and for reciprocating said slide, a cam surface on said slide, and means interposed between said cam surface and said stopping means and arranged to actuate said stopping means during movement 2. In a loom, an oscillating lay, warp stop mechanism including a member fixed to the lay and means movable into the path of movement of said member upon warp failure for stopping the The plunger 30 will raise the loom, a filling feeler fork arranged to engage filling upon forward movement of the lay and to be tilted thereby, a slide having a cam surface thereon, means for reciprocating said slide upon failure of the fork to tilt because of filling failure, and a connection between the slide and said warp stop mechanism arranged to be moved into stopping position during forward movement of the slide.

3. Ina loom, an oscillating lay, means operated upon warp failure to stop the loom, a filling fork arranged to be tilted upon engagement with the filling during forward movement of said lay, a slide on which the fork is pivoted, a, loop on said fork, means having a projection thereon arranged to be engaged by said loop upon filling failure and reciprocating said slide, a cam surface on said slide, a spring-urged plunger arranged to be engaged by said cam surface when the slide moves forwardly, and a connection between said plunger and said stopping means to actuate said plunger and said stopping means to actuate said stopping means during forward movement of said slide.

4. In a loom, a reciprocating lay, means operated upon warp failure to stop the loom, a filling feeler fork arranged to be tilted upon engagement .with the filling, a slide on which the fork is pivoted, cam operated means for reciprocating the slide upon filling failure, a loop on said fork arranged to engage said reciprocating means upon filling failure, a cam surface on said slide, a plunger engaging said cam surface and being arranged to be moved when the slide moves forwardly, a wire member connected to said plunger and being arranged to transmit movement of said plunger to said loom stopping means to condition said means for stopping the loom.

' CARL D. BROWN.

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