US2275931A - Stop motion for looms - Google Patents

Description

March` 10, 1942. l K. vAslLoPoULos 2,275,931

STOP MOTION FOR LOOMS Filed June 11, 1941 2 Sheets-Sheet 1 March 10,. 1942.

K. VASILOPOULOS s'roP MOTIQN Eon Looms 2 Sheets-sheet 2 Filed June l1,` 1941 Patented Mar. 10, 1942 UNITED STATES PATENT OFFICE 2,275,931 sror MOTION FoaLooMs Kostantinos Vasilopoulos, Holyoke, Mass.

Application June 11, 1941, Serial No. 397,612

3 Claims. (Cl. 139-376) The invention has for an object to present an im' improved detachable stop motion for looms, which may be applied to various types of looms, and which is adjustable to accommodate it to various heights and sizes of looms. It has for an important aim to provide means for incorporatbreakage of the filling, and yet which will not involve development of objectionable friction upon the filling threads or interfere with normal operation. of the loom in other respects.

Additional objects, advantages and features of invention reside in the construction, arrangement and combination of parts involved in the embodiment of the invention, as will be readily understood from the following 'description and accompanying drawings, wherein Figure 1 is a side view of a loom mechanism diagrammatic, illustrating one manner of incorporation of my invention upon a loom.

Figure 2 is an enlarged detail of the feeler device, its operating means and the operative connections between the feeler device and the brake.

Figure 3 is a top view of Figure 2.

Figure 4 is a detail of the feeler operating cam and main lever.

Figure 5 is an enlarged side elevation of the cam.

Figure 6 is a plan view thereof.

Figure 7 is a fragmentary rear view of the brake operating means.

There is illustrated a loom mechanism, which may be incorporated in any usual framing and loom operating means, in the present instance there being illustrated a warp supply IU, from which threads are led through the harness apparatus I I, by which the shed I2 is formed, past the filler apparatus, and over the breast I3 to a take-up reel I4. The apparatus also includes a formal representation of the slay I5, having the usual reeds I6 thereon by which the weft is beaten up, the slay being operated in accordance with conventional practices, the operating means for which are not illustrated in detail, with the exception of arms I'I and operating shaft I8 therefor. The reed .and slay device includes a slay bar I9, upon the rear side of which there is mounted a bracket 20, in which a shaft 2I is rockingly mounted, a helical torsion spring 22 being engaged around the shaft, one end being anchored on the bracket and the other connected to the shaft, so as to yieldably tend to move the shaft to one limit of its rocking movement. The shaft .is provided at one end with a crank arm 23, and

extended downwardly therefrom is an operating rod 24 extended downwardly and beside the arm II at its lower part, where it is formed with a telescoped terminal section 25, the relative movement of which on the rod 24 is limited by a pin 26 engaged through the rod 24 and through a longitudinal slot 27 inthe telescoping end section. Above the end section 25, a collar 28 is Xed on the rod 24, and a compression spring 29 is confined between the collar 28 and the section 25, tending to hold the latter at the lower limit of its movement. The lower end of the section 25 is furcated, as at 30, having a slot opening on its lower end. Pivoted on a portion 3l of the loom frame at a distance from the arm II, there is a lever 32, the swinging end of which is extended over a shaft 33, which operates in synchrony with the operation of the slay bar. Upon the shaft 33 there is fixed a cam 34, arranged to engage a wiper roller 35 mounted on the end of the lever 32, the cam functioning to raise and lower the latter. rRaising the lever32 when the slay moves forwardly will bring the reed devices against the filler threads, the cam being of such construction as to complete this operation in advance of the terminal movement ofthe reeds againstv the filler threads, for

reasons which will hereinafter appear.

VMounted on therock shaft 2| there is a feeler device 36, consisting of a hub portion 3'I on the shaft and a plurality of parallel fingers 38, in the form of short wire threads set in the hub, and arranged to project over the slay bar. The fingers are arranged at vsuitable intervals, which may correspond to the intervals between the warp threads of the shed. On the slay I9 there is formed a recessed portion over which a grid or comb plate 40 is mounted, and having a plurality of bars extended thereacross transverse Yto the slay bar, and at intervals corresponding to the intervals between vthe fingers 38 of the feeler, so that at times, when the feeler fingers are depressed, they may pass between the bars of the grid 4I) and a distance therebelow. As may be seen in Figure 1, the lower side of the shed cxtends over the slaybar I5, and the threads thereof extend slightly over the grid 40, which is preferably set nearly, or quite flush with the vtop side of the bar l5. The range of movement of the lever 32 and the nature of its connection with the rod 24 are such that the pin 4l projected transversely from the lever 32 rests at the inner end of the slot 38, and tends to operate the feeler 36 from a position elevated slightly above the grid plate, as shown in Figure 2, to a position slightly below the grid plate. 'Ihe tension of the spring 29, however, is such that should a filler thread be laid over the grid, the fingers 38 will be stopped by the threads, the spring 29 yielding to the upward movement of the telescoped section 25 of the rod 24 thereafter. In case no ller thread is laid across the grid, the fingers 38 will pass below the grid, in a greater movement of the feeler device, and this may be utilized in various ways to effect stoppage of the machine.

In the present instance, a plunger 42 is mounted on the slay bar slidable vertically, and having its upper end disposed in position to be engaged bythe body of the feeler in case the latter moves down to its lower limit, so that the plunger will be moved thereby. The plunger being frictionally held at the upper limit of its movement, is adapted to be reset manually after the operation. At its lower end, it is formed with a trigger device 43, which is engaged with a notch in a rock shaft 44 mounted revolubly under the slay bar, and extended rearwardly a distance therefrom. The shaft 44 has a radial arm 45 fixed thereon, and connected with its extremity there is a contractile spring 46, anchored suitably under tension tending to rotate the shaft 44, the latter being held against such rotation by the trigger 43 until the plunger 42 is depressed.

Adjacent the frontend of the machine a brake operating shaft 48 is shown, revolubly mounted, and upon which a lever 49 is secured. This lever is notched as at 50, in its rearward end, and engaged by a contact lever l, by which its movement is opposed, this lever being supported by a spring device 52 mounted in a bracket 53 on the loom frame, and being positioned closely adjacent the crank 41 of the shaft 44, so that when the trigger 43 is released and the shaft 44 rotated by the spring 48, the crank 41 will engage the lever 5I and raise the same rotating the shaft 48 for operating the brake, The device may be reset as will be obvious.

In order to enable the ready application of my cam device 34 to a machine, and also in order to enable reversal of the loom without necessarily releasing the brake, when so desired, I have provided a special construction in the cam. In this case, the cam consists of a split collar 55 adapted to be bolted together upon a shaft, the-collar elements having corresponding hub portions 5B which serve as the low part of the cam, and on one of the collar sections which is suitably extended for the purpose, there is pivoted a cam member 51, which somewhat resembles in form the pawl device of a ratchet and pawl, and has a similar relation to the hub part, so that the swinging portion may rest upon the hub, from which the outer face of this pivoted cam slopes outwardly to the maximum or high part of the cam. Any usual spring device 58 may be connected with the cam, to hold it yieldingly in its lowest position, against the hub. The wiper roller, 3 5 normally tends to rest upon the hub portion of the cam, and when the cam element proper engages the wiper, the lower part of the pivoted cam passes underthe roller, and lifts it outwardly. The pivot of this cam and the formation of the cam are such that in case the device is rotated reversely, the wiper 35 may pass under the cam, lifting the same against the action of the spring, so that no operation of the lever 32 and rod 24 will occur, and as a consequence, no accidental application of the brake will be caused while the loom is being operated reversely, as might be necessary in repairs, adjustments, or replacements of the filter threads.

While I have described one of the best forms in which my invention has been conceived by me,- and have disclosed the specific construction of a machine embodying the invention, it will, never- -ltheless, be understood that this is purely exemplary, and that various modifications in construction, arrangement and combination of parts, substitution of materials, and equivalents, may be carried out without departing from the spirit of the invention, as more particularly set forth in the appended claims.

I claim:

1. A stop motion for looms comprising a grid device constructed to lie under the path of the filler thread, a feeler constructed to coengage a filler thread laid over the grid, and including members spaced alternately with those of the grid for entry therebetween when not opposed by an interposed thread, means to reciprocate the feeler from a position spaced above the grid to a position therebelow passing through the grid, and means to reciprocate the feeler including a yielding means yieldable to opposition of a thread interposed between the grid and feeler, means to stop a loom, means responsive to full stroke movement of the feeler to control the operation of the means to stop a loom, said means to operate the feeler consisting of a split collar constructed for mounting on a rotary shaft, a cam member consisting of an elongated curved member pivoted at one end on the collar, its swinging end being movable toward and away from the axis of the shaft, and having a clearance under its pivoted end, a lever having a wiper yieldingly loaded and constructed to lie with the wiper alined with the space under the cam pivot, and a link connection with the feeler.

2. A stop motion for looms comprising a grid device constructed to lie under the path of the filler thread, a feeler constructed to coengage a filler thread laid over the grid, and including members spaced alternately with those of the grid for entry therebetween when not opposed by an interposed thread, means to reciprocate the feeler from a position spaced above the grid to a position therebelow passing through the grid, and said means to reciprocate the feeler including a yielding means yieldable to opposition of a thread interposed between the grid and feeler, means to :stop a loom, means responsive to full stroke movement of the feeler to control the operation of the means to stop a loom, said means to operate the feeler consisting of a split collar constructed for mounting on a rotary shaft, a cam member consisting of an elongated curved member pivoted at one end on the collar, its swinging end movable toward and away from the axis of the shaft, and having a clearance under its pivoted end, a lever having a wiper and yieldingly loaded and constructed to lie with the wiper alined with the space under the cam pivot, a link connection with the feeler, said link consisting of an upper rod member pivotally connected to the feeler, a lower section slidable thereon, means to limit positive sliding movement of the lower section, a -spring connected between the upper and lower sections tending to hold the latter at one limit of its movement, said lower section being longitudinally slotted, and a pin on said lever engaged in said slot, the lever pin having movement with the lever in a direction generally longitudinally of the link.

3. A stop motion for looms comprising a grid device constructed to lie under the path of the iiller thread, a feeler constructed to coengage a ller thread laid over the grid, and including members spaced alternately with those of the grid for entry therebetween When not opposed by an interposed thread, means to reciprocate the feeler from a position spaced above the grid to a position therebelow passing through the grid, and said means to reciprocate the feeler including a yielding means yieldable to opposite of a thread interposed Abetween the grid and feeler, means to stop a loom, means responsive to full stroke movement of the feeler to control'the operation of the means to stop a loom, said means to operate the feeler including a split collar constructed for engagement on a rotary shaft, and having a low concentric cam face, an elongated spring-loaded cam pivoted at one end spaced outwardly of said low face, its swinging part being movable and loaded to lie against the low face, a Wiper yieldingly loaded to lie against the cam, and a link connection with the feeler, including means yieldable to opposition of thread loe-y tween the grid and feeler.

KOSTANTINOS VASILOPOULOS.

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