US2532114A - Sleeve or bushing for holding bobbins firmly on the pins of pin trays - Google Patents

Description

G. M EE 2;532,1l4 s VE 0R BUSHING F HOLDING BOBBINS IRMLY ON THE PI F I TRAYS Filed Jul 1 Nov. 28, 1950 Patented Nov. 28, 1950 UNITED STATES i A'ENT OFFICE SLEEVE OR BUSHING FOR HOLDING BOB- BINS FIRMLY ON THE PINS OF PIN TRAYS Application July 8, 1947, Serial No. 7 59,638

7 Claims.

This invention relates to sleeves or bushings, and has particular reference to sleeves or bushings to be applied to the pins of bobbin holding pin trays to hold bobbins mounted on the pins against undesirable movements relative thereto.

In the textile industry it is common to employ pin trays to hold numerous bobbins to facilitate their handling. The bobbins have axial bores and the pin trays have numerous upstanding bore-entering pins upon which the bobbins are mounted. Usually the bores of the bobbins are of considerably greater diameter than the pins and as a consequence the bobbins are engaged quite loosely on the pins, with the result that they are free to tilt and rotate relative thereto. During handling of the trays the bobbins commonly tilt and rotate with the result that the yarn often sloughs off of some or all of the'same and thereby causes complications.

Accordingly, the general object of the present invention is to provide simple, practical means which does not interfere with ready application of bobbins to, and their removal from, the pins of pin trays, and which yet act effectively to hold the bobbins firmly engaged with the pins against their accidental removal therefrom and particularly against any tilting or rotary movements relative thereto whereby sloughing off of yarn from the bobbins is effectively avoided.

More particularly, a special and important object of the invention is to provide means for the purpose stated in the form of simple sleeves or bushings to be engaged on the pins of pin trays and to be received neatly in the bores of the bobbins and which do not require any alteration of the pins or of the bobbins to accomplish their purpose.

Another special and important object of -the invention is so to construct the sleeves or bushings that they are held frictionally yet securely be hereinafter more fully described, illustrated'in the accompanying drawings and defined in the appended claims.

In the accompanying drawings, wherein like characters of reference denote corresponding 'nart in related views:

Fig. 1 is a perspective view .of a portion of a bobbin holding pin tray showing a bobbin mounted on one of the pins thereof in accordance with the invention.

Fig. 2 is a side elevation on an enlarged scale of a pin of a bobbin holding pin tray provided with a head and a sleeve or bushing in accordance with the invention and illustrating a portion of a bobbin partially engaged on said pin.

Fig. 3 is an enlarged perspective view of the sleeve or bushing shown in Fig. 2.

Fig. 4 is a side elevation of a sleeve or bushing of alternative form shown as applied to a pin of a bobbin holding pin tray; and

Fig. 5 is a top plan view of the sleeve or bushing shown in Fig. 4.

Referring to the drawings in detail, first to the embodiment of the invention illustrated in Figs. 1 to 3, and particularly with reference to Fig. 1, A designates, generally, a portion of a bobbin holding pin tray of a known type which includes cross wires or rods l'il having bobbin holding pins l l welded orotherwise fixed thereto and rising therefrom; B designates, generally, a sleeve or bushing formed in accordance with one practical embodiment .of the invention and engaged .on one of the pins ii, and C designates, generally, a bobbin of a known type, engaged on said pin i l and held firmly thereon by said sleeve or bushing B.

The sleeve or bushing B is formed from suitable inherently resilient material such as rubber, synthetic rubber or the like, and has extending axially therethrough an opening l2 adapting the same to be slid onto the pin H. The opening I2 is of slightly lesser normal diameter than the pin l l and as .a consequence, when said sleeve .or bushing is slid onto said pin, said sleeve or bushing is slightly expanded and, by its constant tendency thereafter to contract, is retained frictionally and firmly on said pin as well as against any rotary or tilting movement relative thereto.

The bobbin C has extending axially therethrough an opening l3 which accommodates the pin it and the sleeve or bushing B, andexteriorly said sleeve or bushing is of slightly greater normal diameter, either throughout its length, or throughout one or more portions of its length, than the diameter of the opening 13, so that when said'bobbin is engaged with the pin I l and slid downwardly over said sleeve or bushing B, the latter is slightly compressed and, by its constant tendency thereafter to expand, acts to retain said bobbin frictionally and firmly, yet ready ovably, on said pin 1 I, as well as against 3 any rotary or sidewise movement relative thereto.

If desired, but not necessarily, the upper end of the pin Il may be provided with a head IA of spherical or other suitable shape and of a diameter to neatly fit the opening l 3 of the bobbin B to assist the sleeve or bushing B in holding said bobbin against tilting relative to'the pin H. The head I4'may be formed as an integral part of the pin I I or may be separate from said pin, in which latter event it may be provided with a bore I5 of limited depth and of approximately the same diameter as the pin II to adapt it readily to be applied to the upper end portion of said pin and to be frictionally retained thereon. If formed as an element separate from the pin I I, the head Id may be of metal or of any other suitable material.

If the pin H is provided with a head l4 the sleeve or bushing B may be of short length. If, on the other hand, the pin I I is not provided with a head I4, the sleeve or bushing B is of sufiicient length to act alone to hold the bobbin B against tilting relative to said pin.

As illustrated in the drawings, the sleeve or bushing B is of suiiicient length to adapt it to act alone to hold the bobbin C against tilting relative to the pin l l whether said pin is or is not provided with the head I4. Moreover, the drawings illustrate that throughout the medial portion of its length said sleeve or bushing is of lesser diameter than the diameter of the opening IS in the bobbin B so as to have clearance from the latter. Thus, only the upper and lower head and base portions I6 and II, respectively, of the sleeve or bushing have holding cooperation with the bobbin and as a result it is easier to apply the bobbin to and to remove it from said sleeve or bushing than would be the case if the sleeve or bushing had engagement and holding cooperation throughout its length with the bobbin.

To facilitate compression of the head It by the bobbin B, said head may be longitudinally grooved as indicated at I8. If desired, the base Il may be grooved in the same manner for the same purpose.

The bobbin C is provided at its lower end with diametrically opposite recesses l9 to adapt it to be clutched to a driving mechanism, and when said bobbin is engaged on the pin l I these recesses I9 may receive the pin tray cross wire IE on which the pin I I is mounted, whereby the bobbin is held positively against rotation relative to said pin. In this connection, the lower end portion of the opening I3 in the bobbin C is, as usual, enlarged as indicated at 28. Accordingly, the base portion I! of the sleeve or bushing B is formed to fit and to have holding cooperation with the said enlarged lower end portion 20 of said opening I3. Moreover, said base portion ii is provided with diametrically opposite recesses 2| to receive the cross wire Ill of the pin tray. Thus, not only is said base portion adapted to extend substantially to the bottom of the cross wire I ll for holding cooperation with the bottom part of the enlarged lower end portion 26 of the bobbin opening I3, but the entire sleeve or bushing is adapted to be held positively against rotation relative to the pin II because of engagement of the cross wire II! in said recesses 2 I.

Should the pin tray be of a type in which the pin ll rise from cross members in the form of flat strips or the like, which is common, the lower ends of the sleeves or bushings B and the bobbin C obviously will simply rest upon such flat strips and the base portions I! of the sleeves or bush- 4 ings still will fit and have holding cooperation with the enlarged lower end portions 20 of the bobbin openings I 3.

Referring now to the sleeve or bushing of alternative form illustrated in Figs. 4 and 5 of the drawings and designated generally as B, it is pointed out that the same may be formed from sheet metal or other suitable sheet material and includes a neck portion 22 to receive the pin II and spring fingers 23 to be received in the opening I3 of the bobbin C.

The neck portion 22 is of an internal diameter to adapt it to be forced on the pin I I and to be frictionally and firmly held thereon, and the spring fingers 23 are collectively of a normal diameter somewhat greater than the diameter of the bobbin opening l3 so by the act of forcing the bobbin over them they are sprung inwardly and by their constant tendency thereafter to spring outwardly frictionally and firmly hold the bobbin upon the pin H. To provide the spring finers 23 the sleeve or bushing B may be formed with a longitudinally slitted bulbous portion as shown, or said fingers may be provided in any other suitable or desired manner.

Summarizing, it will be seen that there has been provided simple, practical means for effectively holding bobbins upon the pins of pin trays against the possibility of their accidental removal therefrom and against tilting, sidewise, rotary or other movements relative thereto which might result in sloughing olf of yarn from the bobbins.

If desired, two of the sleeves or bushings B or B may be used in lieu of a single such sleeve or bushing or in lieu of a single such sleeve or bushing and a head such as the head M, in which event one of the sleeves or bushings may be located at or near the bottom of the pin I I and the other may be located at or near the top of said pin. Moreover, whether a single or a pair of sleeves or bushings is or are used in any particular instance, it is not essential that the same be formed for frictional holding engagement with the pin I I. On the contrary, the same may be cemented, welded, soldered, riveted or secured to the pin II in any other suitable or desired manner.

From the foregoing description considered in connection with the accompanying drawings, it is believed that the invention will be clearly understood and its advantages appreciated. It is desired to point out, however, that while only certain specific structures have been illustrated and described, the invention may readily be embodied in specifically different structures within L its spirit and scope as defined in the appended claims.

I claim:

1. The combination of a bobbin holding pin tray including a cross wire or rod having a bobbin holding pin secured at its lower end thereto and rising therefrom, a bobbin having an axial bore to receive said pin and further having diametrically opposite recesses in its lower end portion to receive said cross wire or rod to positively hold the bobbin against rotation relative to the pin, and a sleeve or bushing engaged on the lower end portion of said pin and adapted to enter and to neatly fit the lower end portion of the bore in the bobbin to hold the bobbin against sidewise movement relative to said pin, the lower end of said sleeve or bushing having therein diametrically opposite recesses wherein the portions of the cross wire to either side of said pin are disposed.

2. A sleeve or bushing to be engaged on a pin of a bobbin holding pin tray and to fit closely in the axial bore of a bobbin engaged on the pin to hold the bobbin firmly engaged. with the pin, said sleeve or bushing being formed from inherently resilient material and having an axial bore of slightly lesser normal diameter than the diameter of the pin to adapt it to engage frictionally and tightly with the pin when forced thereon, the end portions of said sleeve or bushing having normal external diameters slightly greater than the diameter or" the bore of the bobbin to adapt them to be compressed by forcing of the bobbin over the same and thereby to act effectively to hold the bobbin firmly on the pin, the portion of said sleeve or bushing between the said end portions thereof being of lesser external diameter than the diameter of the bore of the bobbin.

3. The combination of a bobbin holding pin tray including a cross Wire or rod having a bobbin holding pin secured at its lower end thereto and rising therefrom, and a sleeve or bushing of inherently resilient material engaged on the lower end portion of said Din and adapted to enter and to snugly fit the lower end portion of the bore in a bobbin or quill to hold the latter against sidewise movement and rotation relative to said pin, the lower end portion of said sleeve or bushing having recesses wherein said cross wire or rod is disposed.

4. A sleeve or bushing of inherently resilient material to be engaged tightly over the lower end portion of a pin of a pin tray and to snugly fit the lower end portion of the bore of a bobbin or quill to hold the latter against sidewise movement and rotation relative to the pin, said sleeve or bushing having in its lower end recesses to accommodate a cross wire or rod of a pin tray.

5. A sleeve or bushing of inherently resilient material to be engaged tightly over a pin of a pin tray and to snugly fit the bore of a bobbin or quill to hold the latter against sidewise movements and rotation relative to the pin, said sleeve or bushing having top and bottom portions to snugly fit the bore of a bobbin or quill and between its said top and bottom portions being of a diameter less than the diameter of the bore of a bobbin or quill so as to have clearance from the latter, at least one of said portions having recesses therein to permit the same readily to be compressed by a bobbin or quill engaged thereover.

6. A sleeve or bushing of inherently resilient material to be engaged tightly over a pin of a pin tray and to snugly fit the bore of a bobbin or quill to hold the latter against sidewise movements and rotation relative to the pin, said sleeve or bushing having top and bottom portions to snug- 1y fit the bore of a bobbin or quill and between its said top and bottom portions being of a diameter less than the diameter of the bore of a bobbin or quill so as to have clearance from the latter.

7. A sleeve or bushing as set forth in claim 5 in which the bottom portion of the sleeve or bushing has therein recesses to accommodate a cross wire or rod of a pin tray.

GEORGE MCGEE.

REFERENCES CITED following references are of record in the this patent:

UNITED STATES PATENTS The file of

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