US861190A - Warp stop-motion for looms. - Google Patents

Description

PATENTED JULY 28, 1907.

J. K. LANNING. WARP STOP MOTION FOR LOOMS.

APPLIUATION FILED JUNE 7, 1907.

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JAMES K. LANNING, OF BOSTON, MASSACHUSETTS.

WARP STOP-MOTION FOR LOOMS.

Specification of Letters Patent.

Patented July 23, 1907.

Application filed June 7,1907. Serial No. 377,731.

To all whom it may concern:

the United States, residing at Boston, in the county of Suffolk, State of Massachusetts, have invented an Improvement in Warp Stop-Motions for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

My invention relates to warp stop motions for looms, being more particularly concerned with, but not limited to, the provision of improvements to be used in connection with electrical warp stop motions.

The invention will be best understood by reference to the following description when taken in connection with the accompanying illustration of one specific embodiment thereof, the scope of the invention being more particularly pointed out in the appended claims.

In the drawing, wherein a single type of the invention is illustrated, Figure 1 is a side elevation of a loom frame with attachments applied thereto embodying one form of my invention; and Fig. 2 is a detail view, partly in side elevation and partly in vertical section, of one manner of supporting lease rods in accordance with my invention.

In the drawing, I/have shown my invention as applied to a particular construction of loom and a particular type of warp stop motion, but it is to be understood that such. is for the purpose of illustration only, and that my invention in any desired embodiment thereof may be adapted to looms and stop motions of other and quite different types, whether electrical or mechanical.

Referring to the drawings, I have illustrated the side member 1 of a loom provided with a well-known construction of belt shifting device, which is thrown into operation through the action of the drop bars of the warp stop motion in a manner well understood in the art, it being unnecessary to describe in detail the construction and operation of such belt shifting device. In the present instance, I have shown the loom as provided with circuit establishing devices for the warp stop motion of the same general construction as is described in Patent No. 690,636 to Coldwell & Gilda-rd.

To the side frame members 1 are adjustably bolted the upright angle brackets 2, which sustain the various contact devices for the warp stop motion. These may comprise a single tubular contact bar 3 (see Fig. 2) supported at its ends by suitable insulating plugs, which may be secured in any suitable manner upon the angle brackets 2. Connection is had between the tubular contact bar 3 and one side of the circuit leading to the controlling magnet 4 by means of a contact wire 5 (see Fig. 1.), preferably passing through one of the insulating plugs. The other side of the circuit,

as will be understood by those skilled in the art, is connected through the frame of the machine to the over head circuit and guiding rods 6 (see Fig. 2), which are shown as converging toward their upper edges and secured at their opposite ends to lugs projecting inwardly from the brackets 2.

In the present type of my invention, supported above the contact rods 6 upon the brackets 2 and engaging at their ends with inturned studs sustained by said brackets are tubular lease members, herein represented as rods 7 and 8, which maintain the threads of the warp in a leased condition with successive threads crossed in a fashion well understood to those skilled in the art.

Upon successive warp threads are suspended drop bars 9, herein and preferably arranged in two sets, the drop bars of one set being sustained by one series of threads and having their open depending legs embracing one of the circuit rods and the drop bars of the other set being sustained by the other series of threads and embracing the other circuit rod. In the illustrated construction, as in the aforesaid prior patent, No. 690,636, the drop bars are provided with closed longitudinal slots 10, through each of which passes a transverse retaining rod, the rod for one set of bars being indicated at 11 and that for the other set being indicated at 12. The ends of said retaining rods are suitably supported in any desired manner in the brackets 2. It is, of course, to be understood that any desired form or type of drop or indicating bars may be employed The drop bars and detectors are maintained in accu rate contact with the contact rods 6 under all conditions of use. A break in one of the warp threads causes the drop bar supported thereby to fall and contact with the contact bar 3, completing the circuit and energizing the electro-magnet controlling the dvice for the immediate stoppage of the loom.

It is quite desirable that the leasing members 7 and 8 should so control the position of the threads that the desirable relation between the drop bars and the cooperating contact device should be maintained without displacement, as otherwise vibratory movements of the lay may cause disarrangement of the drop bars relatively to the contact rods. It has been found, however, that if the lease rods be held. rigidly and fixedly that increasing frictional resistance is apt to be put upon the warp threads particularly if the attendant is careless in adjusting the warp or the harness. To avoid the enumerated and other objections, I preferably mount each lease rod for movement in conformity with the leveling or compensating movements of the warp. In the type of stop motion herein selected, the leasing members 7 and 8 serve not only the usual function common in looms of separating the warp threads in such manner that the warp feeds easily and the threads are properly separated and control thereof for repair and manipulation is rendered easier, but in addition the leasing members serve the additional function of supporting the warp against the weight of the drop bars. ,Moreover, where the special form of drop bar here shown is used, the advantages incident thereto are obtained. By providing a construction and arrangement whereby the guiding means for the drop bars and the devices intended to cooperate with the drop bars in their indicating movement to stop the loom, are held in fixed relation so as not to partake of the movements of one or more of the leasing members and preferably are rigidly connected to the loom frame, while the warp supporting lease members or rods, which not only separate the warp but support the same against the weight of the drop bars as above noted, are given a certain freedom of movement which preferably is so confined as not materially to move the drop bars lengthwise of the warps, not only is more freedom given to the warp in its travel by the lease rods and through the drop bars, but greater certainty of stopping action of the stopping mechanism is obtained. A limited movement of the lease rods or members is moreover advantageous, because of the fact that in placing a warp in the loom the weaver or loom fixer may not so adjust the harnesses that the middle point of the shed may be in the same plane as the top of the wheel roll and the lease rods. This supporting of the lease rods so as to permit slight movement thereof 'compensates for this, as well as permitting slight movement when there is a variation of tension or other change in the warp. A warp thread having broken, the drop bar positioned thereon falls and is guided by a stationary guide bar into contact or engagement with the lower cooperating device entirely free of any further movement that may be imparted to the warp supporting lease rods. Not only so, but the movement of the lease rods and the supported threads and drop bars tend, if anything, to increase'the tendency of the released drop bar on the broken thread to fall. All the advantages therefore of permanently positioned guiding and stopping devices are had together with the advantage of relatively freely moving warp supporting bars and lease rods or members.

I11 the present type of the invention, in each bracket or casting 2 I mount for free swinging movement a plurality of lovers 13, herein represented as two in number, each being adapted to receive and support an end of a leasing member or red 7 and 8, whereby the said leasing members may conform to the leveling requirements of the warp. I do not herein broadly claim warp supporting leasing rods or members mounted for movement in conformity with the leveling requirements of the warp and mounted for such movement independently of means cooperating with loom stopping mechanism whether electrical or mechanical, but I do herein claim broadly mechanism whereby an individual or independent or difierential moveme'nt may be imparted to each leasing member or rod of a plurality of leasing members. The leasing members disclosed herein are positively connected by rigid but pivoted or swinging members to the loom frame. It frequently occurs that a loom fixer or weaver so adjusts the warp that the central point between the extremes of movement of the harnesses is above or below the whip roll or other part of the loom affected by the movement of the other leasing member or members. As indicated by the arrows upon Figs. 1 and 2, the levers 13 are inclined in the direction of forward movement of the warp threads, whereby there is no tendency of the leveling action of the warp to cramp said levers with relation to their bearings.

Preferably I provide means to limit or confinethe movement of the leasing members or rods in conformity with the compensating or leveling movements of the warp, and herein for that purpose provide upon each casting or bracket 2 preferably integrally formed lugs or stops 14 and 15 mounted respectively above and below the levers 13. The position of such lugs should be such as to afford the desired freedom of movement of the leasing members. Preferably I provide springs as 16, which when under tension normally support the weight of the lease rods, their supporting levers 13, and cooperating parts, so that said levers are normally free of the stops 14 and 15, and are free to move in accordance with the leveling requirement of the warp, such movement toward the stops 15 being cushioned by said springs and being in opposition to the tension or supporting action of said springs.

I do not herein claim broadly the provision of resilient means for supporting independently mounted lease rods to take their weight off the warp, nor do I desire to claim the same broadly, but merely in combination with means for mounting said rods or members so that they have other than a right line movement in response to the leveling requirements of the warp, such movement in this embodiment of the invention being a pivoted or swinging movement.

Having thus described one type or embodiment of my invention, I desire it to be understood that although I have employed specific terms, they are used in a generic and descriptive sense and not for purposes of limitation, the scope of the invention being set forth in the following claims.

Claims.

1. In a warp stop motion for a loom, the combination with drop bars, guiding means to guide the movement of an indicating drop bar and circuit establishing means cooperating with an indicating drop bar to stop the loom, of warp supporting leasing members between which the drop bars are supported upon the leased threads of the warp, said leasing members being mounted for movement independently of each other to aline with the natural travel of the warp, said support of the leasing members permitting such movement without movement of the said guiding means for the drop bars.

2. In a warp stop motion for a loom, the combination with a plurality of warp thread supporting lease rods, of one or more series of drop bars supported on the sheets of threads formed by said lease rods, said lease rods being mounted for movement independently of each other and in conformity with the leveling requirements of the warp, fixed guiding means to guide the movement of an indicating drop bar, and fixed means to cooperate with said indicating drop bar to stop the loom.

3. In a warp stop motion for a loom, the combination with a plurality of. lease rods dividing the Warp into' sheets, of one or more series of drop bars supported upon the sheets of threads formed by said lease rods, said rods being mounted independently of each other upon the ma chine to permit independent movement in conformity with the leveling requirements of the warp, guiding means to guide the movement of an indicating drop bar, and means to cooperate with said indicating drop bar to stop the loom, said guiding means and said cooperating means being supported to permit movement of one or more of said lease rods independently of said guiding means and said cooperating means.

4. In a warp stop motion for a loom, the combination with a plurality of lease rods mounted for movement independently of each other and dividing; the warp into sheets, a plurality of series of drop bars supported by the warp threads where so separated into sheets, guiding means to guide the loom stopping movement of the drop bars, and means cooperating with the loom stopping mechanism and with which an indicating drop bar is adapted to cooperate, said guiding means and said means cooperating with the loom stopping mechanism being supported to permit movement of one or more of said lease rods independently thereof in conformity with the adjusting movements of the warp.

In a warp stop motion for a loom, the combination with a plurality of lease rods movable independently of each other and dividing the warp into sheets, a plurality of series of drop bars supported by the warp threads where so separated into sheets, guiding means to guide the loom stopping movement of the drop bars, and means cooperating with the loom stopping mechanism and with which an indicating drop bar is adapted to cooperate, said guiding means and said means cooperating with the loom stopping mechanism being supported upon the loom frame.

ii. In a warp stop motion for a loom, the combination with a plurality of warp thread supporting lease rods dividiug the warp into sheets and mounted for movement independently of each other in accordance with the leveling requirements of the warp, one or more series of drop bars supported upon said sheets of warps between the lease rods, guiding means to guide the loom stopping movement of the drop bars, and means coiiperating with the loom stopping mechanism and with which an indicating drop bar is adapted to coiiperate, said guiding means and said means coiiperating with the loomstopping mechanism being supported to permit the defined movement of the lease rods independently thereof.

7. In a warp stop motion for a loom, the combination with drop bars, guiding means to guide the movement of an indicating drop bar, and circuit establishing means cooperating with an indicating drop bar to stop the loom, of warp supporting leasing members between which the drop bars are supported upon the leased threads of the warp, said leasing members being mounted for diiferential move ment with respect to each other, whereby they may individually and differentially aline with the natural travel of the warp, said support of the leasing members permitting such movement without movement of the said guiding means for the drop bars.

S. In a warp stop motion for a loom, the combination with a plurality of lease rods dividing the warp into sheets, of one or more series of drop bars supported upon the sheets of threads formed by said lease rods, said rods being mounted for differential movement with respect to each other in conformity with the leveling requirements of the warp, guiding means to guide the movement of an indicating drop bar, and means to cooperate with said indicating drop bar to stop the loom, said guiding means and said coiiperating means being supported to permit movement of one or more of said lease rods independently of said guiding means and said cooperating means.

9. In a warp stop motion for a loom, the combination with drop bars, guiding means to guide the movement of an indicating drop bar, and circuit establishing means cooperating with an indicating drop bar to stop the loom, of warp supporting leasing members between which the drop bars are supported upon the leased threads of the warp, said leasing members being mounted for swinging move ment independently of each other, whereby they may individually conform to the leveling requirements of the warp, the support of the leasing members permitting such described movement thereof without movement of the said guiding means for the drop bars.

10. In a warp stop motion for a loom, the combination with drop bars, guiding means to guide the movement of an indicating drop bar, and circuit establishing means cooperating with an indicating drop bar to stop the loom, of warp supporting leasing members between which the drop bars are supported upon the leased threads of the warp, said leasing members being mounted for swinging movement independently of each other, whereby they may individually conform to the leveling requirements of the Warp, the support of the leasing members permitting such described movement thereof without movement of the said guiding means for the drop bars, and means to limit the described movement of said leasing members.

11. In a warp stop motion for a loom, the combination with drop bars, guiding means to guide the movement of an indicating drop bar, and circuit establishing means cooperating With an indicating drop bar to stop the loom, of warp supporting leasing members between which the drop bars are supported upon the leased threads of the warp, said leasing members being mounted for independent, differential movement in conformity with the leveling requirements of the warp, means to limit such movement of the leasing members, the support for the leasing members permitting the defined movement thereof without movement of the said guiding means for the drop bars.

12. In a warp stop motion for a loom, the combination with drop bars, guiding means to guide the movement of an indicating drop bar, and circuit establishing means cooperating with an indicating drop bar to stop the loom, of warp supporting leasing members between which the drop bars are supported upon the leased threads of the warp, said leasing members being mounted for swinging movement independently of each other, whereby they may individually conform to the leveling requirements of the warp, and means to support the leasing members to take their weight off the warp, the support of the leasing members permitting the described swinging independent movement of the leasing members without movement of the said guiding means for the drop bars.

13. In a warp stop motion for a loom, the combination with drop bars, guiding means to guide the movement of an indicating drop bar, and circuit establishing means cooperating with an indicating drop bar to stop the loom, of warp supporting leasing members between which the drop bars are supported upon the leased threads of the warp, said leasing members being mounted for swinging movement independently of each other, whereby they may individually conform to the leveling requirements of the warp, and resilient means to support the leasing members to take their weight off the warp, the support of the leasing members permitting the described swinging, independent movement of the leasing members without movement of the said guiding means for the drop bars.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

JAMES K. LANNiNG Witnesses:

AGNES B. HUDSON, ALICE RICHMOND BROWN.

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