US1781801A - Spool or bobbin - Google Patents

Description

Nov. 18, 1930. L. c. BALDWIN 1,781,301

' SPOOL OR 808818 1' Filed Sept. 15, 1927 2 Sheets-Sheet 1 I jailer: @2507 1 Luz/w BQMZUiZ NOV? 13, 9- V L. c. BALDWIN 1,781,801

SPOOL OR BOBBIN Filed Sept. 15, 1927 2 Shoots-Sheet 2 Z .6 4Z5 ".9 I /'d Patented Nov. 1 8, 1930 UNITED STATES PATENT OFFICE LUTHER CHASE BALDWIN, OF PROVIDENCE, RHODE ISLAND, 'ASSIGNOIR, BY MESNE ASSIGNMENTS, TO U. S. BOBBIN & SHUTTLE COMPANY, 1929, OF PROVIDENCE, RHODE ISLAND, A CORPORATION OF RHODE ISLAND SPOOL OR BOBBIN Application filed September 15, 1927. Serial No. 219,621..

6 barrel and head of the spool or bobbin are independent, the invention relating more particularly to means for securing the head of the spool in assembled relation to its barrel and to a process of making such spools or bobbins.

While a wooden barrel is desirable in spools of this character, on account of its light weight and relative cheapness, the fiber head has, to a large extent, displaced the older wooden head by reason of its greater strength, freedom from splitting, nicking or warping, and on account of its smooth surface which will not abrade fine and delicate yarns. 'hile the fiber head is desirable, its inherent characteristics, and particularly its hardness and usual lack of thickness in an axial direction, makes it difiicult to secure it firmly to the wooden barrel and particularly so that it will not turn relatively to the barrel, such relative movement, if permitted, resulting in rapid wear and consequent loosening of the parts and in snarling the yarn or pinching it in the crevice which soon appears between the head and the barrel.

In accordance with the present invention I provide simple, cheap, effective and re-' liable means for holding the spool head in fixed assembled relation to the barrel, the completed spool having a smooth and finished surface free frormproj'ections or other elements which might catch in, or injure the yarn and I have devised a simple and practical method of making this improved spool or bobbin.

.In the accompanying drawings I have illustrated a preferred embodiment of the invention, together with certain of the steps employed in preparing it and I have also illustrated certain desirable modifications of the preferred construction.

In the drawings Fig. 1 is a side elevation of a completed spool or bobbin embodying my invention; Fig. 2 is a fragmentary end elevation, to

larger scale, of the completed spool as shown in Fig. 1;

Fig. 3 is a fragmentary elevation, partly in radial section, illustrating details of the barrel of the spool;

Fig. i is a radial section illustrating a. plug or bushing employed for holding the barrel and head in assembled relation;

Fig. 5 is an end elevation of the head of the spool;

Fig. 6 is a fragmentary edge elevation of the head, to larger scale, and-partly in section on line 66 of Fig. 5;

Fig. 7 is a fragmentary side elevation, partly in section, on line 7-7 of Fig. 2, show ing the completed spool;

ig. 8 is a fragmentary section similar to Fig. 6 but showing a modified construction of head;

Figs. 9, 10 and 11 are views similar to Fig.

8 but showing further modifications;

Fig. 12 is a fragmentary end elevation of a completed spool having a head of the type illustrated in Fig. 9; and

Fig.13 is a cross-sectional view similar to Fig. 7 but showing a modified form of the invention.

Referring to the drawings, the spool comprises a barrel 1 having heads 2 attached to itsfopposite ends. Although I herein refer to this barrel as being made of wood, which is a common, cheap and desirable material for the purpose, I contemplate that other materials having the proper characteristics'may be employed, such for example, as artificial wood, paper, paper board or metal, and when I refer to wood as the substance of the barrel I wish this to be understood as illustrative only and not as restrictive of the invention.

The barrel 1 is preferably tubular, having an axial bore 3. In accordance wi h the present invention I prefer to make this'bore 3 of larger diameter than that necessary to receive the spindle or other supporting means with which the spool is intended to cooperate.

I prefer to provideat each end of the barrel a part 4 of reduced diameter as compared with the body of the barrel, the reduced portion 4 extending inwardly from the end 5 of.

able material and of the necessary thickness to provide the strength requisite for the particular use to which the spool is to be put. I have herein referred to this head as being made of hard fiber which is commonly employed for the purpose but I contemplate that other materials may be substituted among which may be mentioned hard rubber, various phenol condensation products, cellulose derivatives, and the like, as well as wood, and while I have referred to fiber as the substance which I use'in making the head, I wish it to be understood that this term is used merely by way of example and not as restrictive of the invention.

The head 2 may be stamped or died from sheet material of suitable thickness and may have its outer edges smoothed and rounded and its faces finished if necessary before assembling with the barrel. The head 2 is provided with a central aperture 7 and preferably, though not necessarily, this aperture tapers in diameter from the outer surface 8 of the head toward the inner surface 9 of the latter. Preferably the smaller diameter of the aperture 7 is adapted to receive the reduced end portion 4 of the barrel with a fairly snug fit although an accurate or close fit is not necessary.

The wall of the aperture 7 is provided with one or more recesses 10. While I contemplate that a single recess may serve the purpose I prefer to emplo a plurality of such recesses spaced circum erentially a substantial distance apart and preferably I arrange these recesses symmetrically. As here shown, I provide six such recesses, although, as above stated, the exact number is immaterial.

These recesses may be formed in any desired manner as, for example, by the use of a file, saw, grinding wheel or other implements, and as shown in Fig. 6 these recesses extend from the outer surface 8 of the head part way across the thickness of the head, the recesses tapering in width and depth and being of substantially triangular cross section. Such spaced recesses as I have described may be formed much more readily than teeth or projections jutting out from the wall of the aperture since the formation of such teeth or projections necessitates a molding or similar manipulation of the fiber head during its process of manufacture or the cutting away of a very substantial .portion of the intervening material.

Having provided a barrel andhead as described, I-now also provide a plug or bushing 11 as shown-in Fig. 4. This plug 11 preferably comprises a cylindrical body portion 12 adapted to fit snugly within the bore 3 of the barrel and a head or wedge portion which flares outwardly from the body 12, this wedge portion13 preferably terminating in a smoothly rounded outer end surface 14 adapted to give a desirable finish to the completed spool. Preferably this plug or bushing 11 is provided with an axial bore 15 of a suitable diameter to fit over the spindle or other support upon which the spool is intended to be mounted.

In assembling the parts thus described, I. place the head 2 over the reduced end portion of the barrel, causing the inner face 9 of the head to bear against the shoulder 6. I then insert the plug or bushing 11 in the bore?) of the barrel, preferably first coating the outer surfaces of the plug with a suitable adhesive, for example, hot glue. The cylindrical body 12 of the plug is inserted in the bore 3 and then the plug is driven forcibly inward so that its flaring wedge portion 13 expands the material at the end of the barrel, (consituting the reduced portion 4 thereof,) into firm contact with the inner Wall of the aperture 7 in the head, as shown in Fig. 7. In this figure the expanded and outwardly flaring portion of the barrel is indicated at 4*. In thus forcibly expanding the portion 4 of the barrel, its substance is caused to protrude into the recesses 10, as indicated at 4 in Figs. 2 and 7 The engagement of these integral portions of the material of the barrel with the recesses in the head provides positive means for preventing relative rotation of the head and barrel. At the same time the adhesive uniting the plug 11 to the barrel binds all of the parts together so that it is thereafter impossible to separate them, except by breakage, the head being firmly retained between the shoulder 6 of the barrel and the overlapping flaring portion 4 of the barrel.

While I have referred to the use of adhesive in securing the plug 11 in position, I wish it to be understood that other fastening means might be employed -if desired and when in the claims I have referred to fastening means I wish this term to be construed broadly and not as necessarily limitedto glue or other adhesive.

While the type of recess above described is desirable and easy to make, I contemplate that other types of recess may be found useful and desirable under certain conditions. For example, in Fig. 8 I have indicated the head 2 as provided with the aperture 7 a and in th s arrangement I show substantially straight recesses or grooves 10 of uniform width extending from the outer surface of the head across to its inner surface. Such recesses may be spaced apart in the same way as the recesses 10 above referred to and may he made by the use of any suitable implements or in any desired manner.

InFig. 9 I illustrate an arrangement'of recesses of somewhat diflerentcharacter, the head 2 having the central aperture 7* and the recesses 10 in the wall of this aperture. In this instance the recesses '10 extend from the inner face 9 of the headtoward its outer face 8 but terminate before they reach the outer face. Thus, the edge 16 of the aperture 7 at the outerfac'e 8" of the head is smooth and u'nnotched; The recesses 10? may be of triangular section'or of such other form as may be desired.

In Fig. 10 I have shown a further modi fication in which the head 2 is provided with the central aperture -7 and with a series of recesses 10 'in the wall of the aperture.

, of substantially circular 'or' semi-spherical recesses 10 When heads of thetypes-shown in Figs. 9, 10 or 11 are assembled with the barrel and secured in position by means of the plug or bushing, as above described with respect to Figs. 1 to 7, the reduced port on 4 of the barrel is expanded and flared outwardly in the same way as indicated in Fig. 7 to provide a ring-like portion 4 which appears at the end of the spool,but as shown in Fig. 12

those portions of the material of the barrel which are forced outwardly into the recesses in the head do not show from the exterior so that in the completed spool these retaining elements are not apparent. The arrangements shown in Figs. 9, 10 and 11 are intended merely as examples of structures in which the retaining elements are concealed in the completed spool and obviously other shapes of recess than those illustrated could be employed for the purpose, and I regard all such shapes as within the scope of the invention.

Fig. 13 illustrates another form of the invention, in which the material of the plug 111 is pressed directly into engagement with the annular head 102. As in other forms of the invention. the head may have a central aper ture which is tapered from the outer surface 108 of the head toward its inner surface 109, and the wall of the aperture may have a plurality of recesses 110. In the form of the invention disclosed inFig. 13 the material of the bushing 111 is forced into direct engagement with the tapered wall of the head tive of the invention but merely as suggese tive of further possibilities in the way of modificationof the structure which I have herein claimed broadly and I wish it to be understood that further changes in shape, size, relative proportions and arrangement ofparts, and materials used may be made as circumstances may warrant and within the scope of the appended claims.

Iclaim:

Y 1. A spool or bobbin comprisin av tubular barreland a headindependent t ereof, the head having a central aperture receiving the end portion of the barrel, the wall of said aperture having circumferentially spacedre cesses and the barrel having integral projec tions engaging said recesses whereby posi-' tively to prevent relative rotation of the head and the barrel, said recesses being spaced from the outer surface of the head and tapering in width, being widest adjacent to said inner face of the head.

2. A spool or bobbin comprising a wooden barrel and a hard fiber head, the head having a central aperture receiving the end portion of the barrel, the wall of said aperture having circumfe'rentially spaced recesses and the barrelhaving integral projections engaging said recesses whereby positively to prevent relative rotation of the head and barrel, said recesses and projections being wholly concealed from view in the completed spool.

3. A spool or bobbin comprising a barrel and a head independent thereof, the head havinga central aperture receiving the end portion of the barrel, the wallof said aperture having circumferentially spaced recesses and the barrel having integral projections engaging said recesses whereby positivel to prevent relative rotation of the'head and arrel, the recesses tapering in width and being widest adjacent to the inner face of the head and terminating at a point spaced from the outer face of the head, said recesses and projections being wholly concealed from view in the completed spool.

4:. A spool or bobbin having a tubular barrel and a head independent of the barrel, said head having a central aperture provided with a recess in its wall, the recess being spaced from the outer surface of the head, the barrel comprising an end portion of reduced diameter dis osed within said aperture, said end portion aving a projection entering said recess. and a bushing disposed within the end of the barrel, said bushing holding said end portion of the barrel in firm engagement with the head. I I

5. A textile spool or bobbin having a tubular wooden barrel and a hard fiber head, said head having a central aperture provided with widely spaced recesses in its wall, said recesses being spaced from the outer surface of the head and being of substantially triangular cross section, the barrel having an end portion disposed within the aperture within the head, and a wooden plug disposed within the barrel and secured thereto bymeans of adhesive, said plug having a tapered portion forcibly inserted in the end portion of the barrel soas to embed the material of the barrel in the spaced recesses in the head, thereby to prevent relative rotation of the head and the barrel.

6. A spool or'bobbin comprising a barrel having an axial bore, a head independent of the barrel, said head having a central aperture provided with spaced recesses in its walls, said recesses being spaced from the outer face of the head, the barrel having an end portion disposed within the aperture in the head, a plug having a body portion fitting into and fixed within the bore in the barrel and having a tapered head acting as a wedge to hold the endportion of the barrel in firm engagement with the wall of the aperture in the head and to force portions of the material of the barrel into said recesses.

7. A spool or bobbin having a tubular wooden barrel and a hard fiber head, the head having a. central aperture which tapers from, its outer surface inwardly and which has recesses in its wall, the barrel comprising an end portion of reduced diameter providing a shoulder for en agement with the inner surface of the head said reduced end portion being disposed within the aperture of the head and flaring outwardly into contact with I the wall of the aperture, portions of the material of the barrel entering the recesses in said wall to prevent relative rotation of the barrel and head, said portions being concealed from view in the completed spool, a bushing disposed within the end of the barrel, said bushing having a tapered part engaging the flaring end portion of the barrel, and means fixedly securing the bushing within the barrel. Y

8. That method of making spools or bobbins which comprises as steps preparing a barrel having an axial bore and'an end ortion of reduced diameter terminating in a radial shoulder, preparing a head having a central aperture adapted to fit over the reduced end portion of the barrel, said aper ture tapering in diameter from the outer toward the inner face of the head and having a plurality of circumferentially spaced re-' cesses in its wall, said recesses being spaced from the outer surface of the head, preparing a plug having a body portion adapted to fit snugly within the bore in the barrel and a flaring wedge portion, pushing the reduced end portion of the barrel into the aperture in the head until the shoulder engages the inner face of the head, and driving the plug into the bore in the barrel until its flaring wedge portion expands the end of the barrel outwardly into contact with the tapering wall of the aperture in the head and causes the material of the end portion of the barrel to protrude into said recesses.

9. That method of making spools or bobbins which comprises as steps preparing a wooden barrel having an axial bore and an end portion of reduced diameter terminating snugly into the bore inthe barrel and an outwardly flaring wedge-like end portion, pushing the reduced end portionof the barrel into the aperture in the head until the shoulder engages the inner face of the head, applying adhesive to the outer surfaces of the plug, and driving the plug into the bore in the barrel until its flaring wedge portion expands the end portion of the barrel outwardly into close contact with the tapering wall of the aperture in the head and causes the material of theend portion of the barrel to project into said recesses.

Signed by me at Providence, Rhode Island, this thirteenth day of September, 1927.

LUTHER CHASE BALDWIN.

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