US1523361A - Warper stop-motion mechanism - Google Patents

Description

; A. E. RHOADES WARPER STOP MOTION MECHANISM Filed March 7, 1925 2 Sheets-Shet 2 4 Fig. 3.

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Patented Jan. 13, 1%25.

n i 'r ALONZO E. RI-IOADES, OF HOPEDAILE, MASSACHUSETTS, ASSIGNOR TO DRAPER COR- POl'xEA'lIOIQ' OF HOPEIDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

WABIPER STOP-MOTION IVIECHANISM.

Application filed March *7, 1923.

To all 107mm it may concern:

Be it known that I, ALoNZo E. Rrronnns, a citizen of the United States, and resident of Hopedale, county of lVorcester, State of Massachusetts, have invented an Improvement in lVarper StoplVIotion Mechanism, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

This invention relates to warpers or warping machines and more particularly to an improved form of stop motion mecha' nism easily adapted to existing warpers, readily and economically manufactured, unlikely to get out of order when dirt and lint accumulate, and readily kept clean.

The object of the invention is further to provide such a mechanism which shall require but a single bank of drop wires.

The object of the invention is further to provide such a mechanism which shall be positive and accurate in its operation. These and other objects and features of the invention will be fully set forth in the accompanying description and drawings and defined by the claims.

The invention in its preferred form is shown in connection with a warper of the type illustrated in the aforesaid patent to Rhoades and as the invention relates to the stop motion mechanism it is unnecessary to illustrate or describe the details of the warping machine except in so far as they are particularly involved in the invention.

In the drawings:

Fig. 1 is an end elevation of the warping machine embodying a preferred form of the present invention and disclosing only so much of the mechanism as is necessary to an understanding thereof;

Fig. 2 is a top plan view partially in cross section taken on the line 2-2 of Fig.- 3 of a Serial No. 623,345.

portion of the end frame of the warper and stop motion mechanism;

Fig. is a front elevation of the construction shown in Fig. 2, the frame of the warper being shown in cross section;

Fig. 4: is a view in vertical cross section taken on the line a e of Fig.

In the type of machine illustrated the end frame 1 carries the continuously moving ele ment or rock shaft 2. This rock shafthas connected thereto and projecting upwardly therefrom the rocker arm 3. This rocker arm carries the pawl 4 which actuates a ratchet wheel 5 which in turn through the medium of the worm 6, worm wheel 7, vertical shaft 8, worm 9 and worm wheel 10 drives the warp measuring mechanism, or as it 7 is commonly termed the war )er ClO'Ck The warper clock in the form il ustrated comprises a spirally grooved barrel 11 and a finger 12 co-operating therewith and mounted to slide on a shaft 13. This finger 12 rides in the groove of the barrel 11 and when the predetermined length of warp has been measured rides out of the groove and is rocked about the shaft 13 by the weight 14 causing the left hand end of the linger to swing upwardly. This movementis availed of to actuate the stop motion mechanism upon the completion of the passage through the warper of a predetermined length of warp.

The means employed for el'fectingi the stopping of the warper upon the operation of the stop mot-ion mechanism may be of any desired construction and, for the purpose of illustrating a disclosure of the presentinvention, is assumed to be of the general construction shown in the aforesaid patent to Rhoades. In that construction the starting and stopping shaft 15 when moved clockwise, viewing Fig. 1, shifts the driving belt of the warper from the fast to the loose pulley and stops the machine. This shaft 15 has secured to it outside the end frame 1 an arm 16 to which is pivotally connected at 17 the vertically extended shipper rod 18. The upper end of the shipper rod extends through a suitably notched holding plate 19 on the frame and is provided with a shoulder 20 engaging the underside of .the plate and maintaining the stop motion mechanism inoperative when the machine is runnin A. knock-01f lever 21 is pivoted on the frame in such a position that when its upper end. is moved to the right, viewing Fig. 1, its lower end engages the shipper rod 18 and pushes the shoulder 20 thereof out of engagement with the notched plate 19 thus allowing the shipper rod to move vertically through the notched plate and the shaft 15 to turn clockwise and stop the operation of the machine.

A latch in the form of a bent lever presenting a horizontal arm 22 and an upstanding arm 23 is pivotally mounted at 24 on the upper end of the rocker arm 3. The rocker arm 3 is also provided with an upstanding projection 25. So long as the 1 arm 23 of the latch is held in contact with the projection 25 the left hand end of the arm 22, during the oscillation of the rocker arm 3, will move in a path above the knockoff lever 21. But if the latch is allowed to drop or swing away from the projection 25 then. upon the movement of the rocker arm 3 to the left, the end of the arm 22 of the latch, which is hooked for that purpose. will drop behind or to the left of the upper end of the knockoff lever 21 and, upon the movement of the rocker arm 3 to the right will catch the knock-off lever and swing it to effect the release of the shipper rodlS and the stopping of the machine.

The latch is held in its normal or inoperative position with its arm 23 against the projection 25 by an arm 26 secured to a rock shaft 27 and a weight 28 adjustably mounted on an arm 29 also secured to the rock shaft 27. During the normal operation of the warper the rockerarm 3 oscillates back and forth and the arm 26 oscillates therewith. the weight 28 acting to hold thearm 26 and consequently the latch end the extremity of its movement to the left,

viewing Fig. '1, so that it can not move in the opposite direction or to the right. This restraint of movement allows the latch to drop and effect the stopping of the machine in the manner descrlbed.

The shaft 27 and the arm 26 are thus restrained from movement to effect the stopping of the warp'er through the operation of the warper clock already described by means of a notched arm 30 adjustably secured to the finger 12 and cooperating with a pin 31 projecting from the arm 26 These parts are so arranged that when the finger 12 rides out of the groove in the barrel 11, this notched arm 30 is carried upwardly by the finger into the path of the pin 31 and catches over the pin when the arm 26 is swung to the left and thus restrains it from swinging to the right. '7

The mechanism by which the warper is stopped upon the absence or failure of a warp end, and with which the present in.- vention more particularly concerned, is illustrated in detail in Figs. 2. 3 and 4. The end frames of the warper are provided with upstanding brackets one of which is shown at 32 secured to the end frame 1. Between these brackets extend a pair of parallel bars 33 and 34: over which the sheet warp passes.

Intermediate and beneath the bars 33 and 34; and extending across the warper beneath the warp sheet are mounted a plurality of parallel relatively: i'eciprocable toothed bars. These toothed bars are preferably three in number, two of them 35 and 36 being fixedly secured to the brackets and the third being recipincable between these two. As illustrated the fixed toothed bars have their teethl a t the upper edgejpointing away from the end frame 1 and are secured in place to the lorackets at their ends as by means of the Wing nut 37. The intermediate or movable bar 38 is of less deptlr tln-nitlie fired bars and rests upon a spacer 39 and has its teeth pointing toward the end frame 1. A plurality of drop wlres 1n the form of flat steel members 40. are provided, one for each warp. These drop wires are bifurcated at their lower'endsto straddle the toohted bars and at their upper ends are apertured at 4:1 and the individual warps are threaded through these apertures. Each drop wire is. therefore. t-llll)1)()1'l1(l by its warp and the warp in turn are supported directly in front and behind the drop wires by a the bars 33 and 34. Whenever a warp end fails either by running out or by tweaking or from any other cause the corresponding drop wire falls or drops into engagement with the toothed bars and locks them against relative reciprocation in one direction.. In the construction illustrated a drop wire. when 1t falls,

prevents movement of the toothed bar 38 toward the end frame 1 by reason of the arrangement of the teeth on thfiTGSIJGCilVQ bars but it still permits movement of the toothed. bar 38 in the opposite direction. Consequently the toothed bar 38 is locked to the toothed bars 35 and 36 when ithas reached its extreme movement away from the end frame 1 and against movement toward the end frame 1 whenever a drop wire'falls. Thisrestraint of movement of the bar 38 in one direction upon the falling of a drop Wire is availed of to elfect the teppin f t re t tieeet the. eir-erllitl The relative reciprocation of the toothed bars, or in this case the reciprocation of the movable toothed bar 38 with respect to the fixed toothed bars and '36, is secured from the rock shaft 27 and the details of a preferred form of mechanism for this purpose are illustrated in Figs. 2, 3 and 4.

This rockshaft 27 is journalled at its outer end in the end frame 1 and at its inner end in a hub 42 formed in an arm l3 projecting from the bracket 32. Adjacent the hub 42 an arm 44 is secured by a set screw 45 to the rock shaft 27. A link 4.6 is pivoted at its upper end at 47 to the arm 44 and at its lower end at 4:8 to the shorter and curved arm 49 of a bell crank lever fulcrumed at 50 on a bracket 51 secured by a bolt 52 to the end frame 1. The longer arm 53 of the bell crank lever extends upwardly in line with the movable toothed bar 38 and a link 54 is pivoted at 55 to the toothed bar 38 and at 56 to the bell crank lever. It will thus be seen that the weight 28 which acts to rock the rock shaft 27 counter-clockwise, viewing Fig. 1, acts thus to move the toothed bar 38 toward the end frame 1. The rocker arm 3 acting through the arm 26 acts to rock the rock shaft 27 in the opposite direction and thus move the toothed bar 38 away from the end frame 1.

During the normal operation of the machine the rock shaft 27 is constantly moving, being rocked in one direction from the rocker shaft 3 and in the opposite direction by the weight 28. The connections from this shaft to the toothed bar 38 act, therefore, to effect the relative reciprocation of the toothed bars. The weight acts to rock the shaft in one direction, but it is restrained from doing so when the toothed bars are locked together which'happens when a drop wire has fallen and the toothed bar 38 has been moved to its extreme position away from the end frame 1 by the action of the rocker arm 3 through the arm 26 connected to the rock shaft 27. The rock shaft 27 is thus restrained from movement when a drop wire falls with the arm 26 standing in its extreme position to the left, viewing Fig. 1. Consequently the latch 2223 is free to drop and the warper is stopped upon the next vibration of the rocker arm 3 to the right in the same manner as heretofore described in connection with the actuation of the stop motion mechanism by the warper clock.

There is thus presented a very simple and effective means for stopping the operation of a warper whenever a warp end is absent or fails as well as when a predetermined length of warp has passed through the warper.

Having thus described the invention what is claimed as new and desired to be secured by Letters Patent, is:

l. A warper comprising a plurality of parallel relatively reciprocable toothed bars, a plurality of drop wires supported by the warp and each acting upon failure or breakage of its supporting warp to drop into engagement with and lock said toothed bars against relative reciprocation in one direction, a shaft mounted in fixed position in the warper frame and connections therefrom acting to effect the relative reciprocation of the toothed bars when the shaft is rocked, means acting to rock the shaft in one direction and restrained from action when the toothed bars are locked, and means continuously operated by a moving element of the warper acting to rock the shaft in the opposite direction and acting further to effect the stopping of the warper when the opposed rocking means is restrained.

2. A warper comprising a fixedly mounted toothed bar. a movable toothed bar mounted for reciproction parallel to the fixed bar, a plurality of drop wire supported by the warp and each acting upon failure or breakage of its supporting warp to drop into engagement with the toothed bars and lock the movable toothed bar against movement in one direction, a shaft mounted in fixed position in the warper frame and connections therefrom acting to effect the reciprocation of the movable toothed bar when the shaft is rocked, a Weight acting to rock the shaft in one direction and restrained from action when the movable toothed bar is locked against movement by a drop wire, and means continuously operated by a moving element of the warper acting to rock the shaft in the opposite direction and acting further to effect the stopping of the warper when the action of the weight is restrained.

3. A warper comprising a fixedly mounted toothed bar, a movable toothed bar mounted for reciprocation parallel to the fixed bar, a plurality of drop wires supported by the warp and each acting upon failure or breakage of its supporting warp to drop into engagement with the toothed bars and lock the movable toothed bar against movement in one direction, a shaft mounted in fixed position in the warper frame and connections therefrom acting to efiect the reciprocation of the movable toothed bar when the shaft is rocked, a weight acting to rock the shaft in one direction and restrained from action when the movable toothed bar is locked against movement by a drop wire, means for rocking the shaft in the opposite direction, means for stopping the operation of the warper, and means controlled from the shaft and rendered active when the action of the weight is restrained to effect the operation of the warper stopping mechanism.

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

ALONZO RHOADES.

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