US2997073A - Stop motion device - Google Patents

Description

1961 R. E. MORTON STOP MOTION DEVICE Filed April 4, 1960 INVENTOR. ROBERT E. MORTON ATTORNEY United States Patent Corporation, Cranston, R.I., a corporation of Massachusetts Filed Apr. 4, 1960, Ser. No. 19,886 4 Claims. (Cl. 139-3364) The present invention relates to a stop motion device and relates particularly to a stop motion device for arresting the transfer of a canted bobbin from a reserve bobbin magazine to the shuttle of a loom.

In the following specification and claims the term yarn is employed in a general sense to apply to all kinds of strand material either textile or otherwise, and the designation package is intended to mean the product of a winding or twisting machine whatever its form.

In a loom of the automatically replenishing type a socalled transfer mechanism forming a part of the loom serves upon substantially exhaustion of filling in the shuttle to eject the exhausted bobbin and to replace it with a full one from a reserve supply magazine while the loom is in operation. The supply bobbins may be held in a magazine of the type disclosed in United States Paten-t 2,766,779 issued October 16, 1956 to William V. Goodhue et al. for Replenishing Means for Looms. In accordance with practice as described in said patent supply bobbins are wound by some convenient means at least as fast as required by the loom. The wound bobbins are deposited in any convenient manner in a magazine from which the leading bobbin may be transferred to the fly shuttle of the loom when required. The magazine of the patent noted above is capable of accommodating several bobbins in overlying relationship, each full bobbin entering the top of the magazine and gravitating downwardly to the lowermost section of the magazine, whereafter it will be successively transferred to the fly shuttle.

As a bobbin enters the magazine and gravitates downwardly it may become canted. If a bobbin so canted remains undetected as it rests in the lowermost section of the magazine it will be transferred to the shuttle of the loom in its canted position thereby exposing the shuttle and associated loom par-ts to damage and the warp and filling to breakage.

Therefore, one object of the present invention is to provide a device for checking the attitude of a bobbin positioned in the lowermost section of a reserve magazine prior to the transfer of said bobbin to the shuttle of a loom.

Another object of the present invention is to provide automatic means for arresting transfer of an improperly positioned bobbin from the reserve magazine of an automatic loom to the shuttle of the loom.

Another object of the present invention is to provide means for inactivating the transfer mechanism of a loom when a bobbin to be transferred from the reserve magazine of said loom is improperly positioned.

Another object of the present invention is to provide means for checking the attitude of bobbins in the reserve magazine of an automatic loom which is inexpensive to manufacture and durable and reliable in use.

Other objects of the invention will in part be obvious and will in part appear hereinafter.

The invention accordingly comprises the apparatus possessing the construction, combination of elements and arrangement of parts which are exemplified in the following detailed disclosure, and the scope of the application of which will be indicated in the claims.

For a fuller understanding of the nature and objects of the invention, reference should be had to the following detailed description taken in connection with the accompanying drawings wherein:

FIG. 1 is a perspective view illustrating the present invention mounted on a filling slide lever with the detector fingers thereof extending toward a properly seated bobbin;

FIG. 2 is a plan view of the device as shown in FIG. 1 and;

FIG. 3 is a perspective view similar to the view of FIG. 1 but showing the detector fingers extending forwardly toward a canted bobbin within a reserve supply magazine and with a loop operatively engaged with the hook latch of the present invention.

The device of the present invention is comprised of a latch supporting member mounted on a loom and carrying a hook latch and cooperating detector fingers and a pair of loops. The fingers are so arranged that they are capable of engaging the lowermost bobbin within a reserve bobbin supply magazine at horizontal spaced points and thereby detecting a canted bobbin as it rests therein. Upon detecting the canted bobbin a detector finger rocks inwardly to occupy the void created by the tilted bobbin thereby causing a hook cooperating therewith to be pivoted downwardly to be engaged by an aligned hook of said hook latch. The loom transfer mechanism is thereby inactivated, thus preventing transfer of said canted bobbin to the shuttle of said loom.

Referring now to the drawings wherein is shown a preferred embodiment of the present invention. A right angle bracket 10 is fixed on filling slide lever 12 and filling slide lever end 13 of a loom by a bolt 14-. Bracket 10 is bored to receive stub shaft 16 and filling slide shaft 18. Filling slide shaft 18 normally supports a filling slide (not shown) of a loom and is described herein only insofar as said shaft relates to the present invention. A member 20, shaped generally as an obtuse-angled triangle, has its longest leg in a horizontal plane. A plane of hubs 22 and 24 are disposed at opposite ends of member 20. Hub 22 is bored transversely therethrough to accommodate shaft 18 therein. A pair of set screws 26, radially positioned about hub 22 and threadedly engaged therein bear against shaft 18 to fix member 20 fast on said shaft 18 whereby said member 20 projects toward a reserve bobbin magazine M. It will be understood that magazine M is mounted on a loom to position bobbins carried thereby above the loom shuttle at its transfer point.

Stub shaft 16 has a hook latch 28 carried for pivotal movement thereon. Hook latch 28 extends transversely of and inclines somewhat from the axis of shaft 16 to seat within a channel 30 of pad 32. Pad 32 is generally square in shape and may be fixed to member 20 by bolts or a weld or it may be cast integral therewith. Hook latch 28 is bifurcated through the greater part of its length to thereby provide a pair of upstanding spaced hooks 34 and 36 defined in its outermost end. A torsion spring 38, coiled about shaft 16, is suitably anchored at one end to hook latch 28 and has its opposing end engaged with bracket 10 whereby spring 38 will urge hook latch 28 into channel 30.

Hub 24 is bored transversely therethrough to receive a tubular support element 40, which is positioned fast within said hub by a set screw 42 threadedly engaged in hub 24 and bearing on support element 40. Bushings 44 are inserted in the ends of support element 40 to accommodate a shaft 46 for rotation therein.

A collar 48, fixed on one end 50 of shaft 46 by a stud 52 for rotation therewith, has a flat-headed screw 54 threaded of the periphery thereof. Collar 48 and screw 54 are adapted to receive the ends 56 of U-shape'd detector finger 58. Ends 56 are secured between the periphery 3 of collar 48 and the head of screw 54 so that finger 58 extends forwardly and downwardly from shaft '46.

The opposite end of 60 of shaft 46 is bent to form a hook with the terminal portion 61 thereof being directed toward the end 50 as most clearly shown in FIG. 2.

The end of element 40 opposite of the end supporting collar 50 is reduced in diameter to provide a bearing surface 62 to rotatably mount a pair of adjacent sleeves 64 and 66 thereon. The ends of an elongated U-shaped wire loop 70 are coiled about the circumference of sleeve 64 with the loops thereof extending horizontally rearwardly so that the bight of said loop will overlay hook 34. Sleeve 66 similarly mounts a companion elongated wire loop 72, which extends horizontally rearwardly, parallel to loop 70 to be aligned with an overlay hook 36. Terminal portion 61 of shaft 46 extends a sufficient distance toward shaft end 50 so that said portion 61 unlays and normally supports loop 70. However, it will be noted that end 61 does not underlay loop 72. Hook 60 and loop 70 overbalance detector finger 58 upwardly thereby permitting loop 70 to engage book 34. On the other hand, hook 160 and loop 70 will be responsive to downward movement of detector finger 58 to rock upwardly to disengage loop 70 from hook 34.

A detector finger 74, which may be constructed as a separate element or may be formed as a continuation of one of the legs of loop 72, is secured to sleeve 66 and extends forwardly and downwardly therefrom generally parallel to detector finger 58. Finger 74 is adapted to respond to the overbalance exerted by loop 72 to rock upwardly as said loop 72 pivots downwardly to engage hook 36. It will be understood that loop 72 will be pi-voted upwardly cooperatively with downward movement of finger 74.

Upward movement of loops 70 and 72 is limited by a pin 76 which is mounted fast in one wall of member 20 and extends horizontally outward therefrom to be positioned over said loops.

The foregoing mechanism operates in the following manner. With the apparatus of the present invention in place on a loom as previously described detector fingers 58 and 74 will project forwardly and downwardly to thereby occupy positions with a reserve bobbin M normally filled by the terminal portions of a bobbin B. If the lowermost bobbin in said magazine is in a level position fingers 58 and 74 will be rocked downwardly, being displaced by the terminal portions of said lowermost bobbin. Upon substantial exhaustion of filling in the shuttle a transfer mechanism (not shown) operates to replace the substantially exhausted bobbin in the shuttle with a full bobbin from the resreve magazine. As an incident of the transfer operation filling slide lever 12 is rocked counterclockwise, as viewed in FIG. 1, about shaft 18 under spring load in a manner well known in the art. Filling slide lever 12 thereafter is returned to its rest position as shown in FIG. 1.

When the lowermost bobbin in the reserve magazine is canted detector fingers 58 or 74 will be pivoted forwardly and upwardly, i.e., counterclockwise as viewed in FIGS. 1 and 3, under the weight of loops or 72 respectively. The detector finger and loop which will respond will be dependent on which way the bobbin has become canted. As a given loop rocks downwardly it will be engaged with the book of hook latch 28 with which it is aligned. Thereafter, as the spring loaded bobbin transfer mechanism attempts to rock counterclockwise about shaft 18 as previously described, such motion will be arrested by the positive engagement of either hook 34 with loop 70 or hook 36 with loop 72. With the transfer mechanism of the loom rendered inoperative the loom will stop in an old and well known manner.

Since certain changes may be made in the above apparatus, without departing from the scope of the invention herein involved, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in the limiting sense.

What is claimed is:

1. In an automatic bobbin changing loom having a magazine adapted to hold a supply of full bobbins for insertion into the loom shuttle and bobbin transfer means actuated by substantial exhaustion of yarn from a bobbin carried by said shuttle to eject such exhausted bobbin and replace it with a full bobbin from said magazine, the combination with said transfer means of a detector finger adapted to engage a full bobbin in said magazine, latch means associated with said detector finger and said bobbin transfer means and adapted when engaged to render the transfer means inoperative, said finger being adapted to be moved by a full bobbin properly positioned for transfer to disengage said latch means.

2. The combination as set forth in claim 1 wherein said latch means comprises cooperating hook and loop.

3. In an automatic bobbin changing loom having a magazine adapted to hold a supply of full bobbins for insertion into the loom shuttle and bobbin transfer means actuated by substantial exhaustion of yarn from a bobbin carried by said shuttle to eject such exhausted bobbin and replace it with a full bobbin from said magazine, the combination with said transfer means of a pair of spaced detector fingers adapted to engage the opposite ends of a full bobbin in said magazine, latch means associated with each of said detector fingers and said bobbin transfer means, each latch being adapted when engaged to render the transfer means inoperative, both fingers being adapted to be moved by a full bobbin properly positioned for transfer to disengage both said latch means.

4. The combination as set forth in claim 3 wherein said latch means comprises cooperating hooks and loops.

References Cited in the file of this patent UNITED STATES PATENTS Rhoades Aug. 31, 1920

Images