US569245A - Expansible chuck - Google Patents

Description

'(No Model.)

J. 0. SMITH. EXPANSIBLE CHUCK.

Patented 001;. 13, 1896.

INVENTUR 3 UNITED STATES PATENT OFFICE.

JAMES 0. SMITH, OF NEIVARK, NEW JERSEY. I

EXPANSIBLE CHUCK.

SPECIFICATION forming part of Letters Patent No. 569,245, dated October 13, 1896.

Application filed June 6, 1894.

To ail whom, it may concern:-

Be it known that I, JAMES 0. SMITH, acitizen of the United States, residing at Newark, in the county of Essex and State of New J ersey, have invented certain new and useful Improvements in Expansible Chucks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon which form a part of this specification.

The object of this invention is to provide a simple, durable, and effective chuck for holdin g a hollow tube or core to a mandrel or shaft while a continuous web of paper or other material is being wound upon or unwound from such tube or core, and capable of being expanded and contracted at pleasure, so as to snugly fit such hollow tube and prevent the latter from turning thereon, and to be readily released therefrom when desired.

The invention consists in the improved chuck, and in the combination and arrangement of the parts thereof an d connected therewith, as herein set forth, and finally pointed out in the claim.

Referring to the accompanying drawings, in which similar letters of reference indicate corresponding parts in each of the figures where they occur, Figure 1 represents a hollow tube or core with a web of paper thereon and mounted upon my improved chuck. Fig. 2 represents, partly in section and partly in elevation, a broken-off portion of the same,en-

larged. Fig. 3 is a transverse section through said tube and the shaft upon which the chuck is mounted and showing the said chuck in end elevation. Fig. at is an inverted plan of one of the segments or sections of a sleeve carried by said plug, and Fig. 5 is a plan of the plug aforesaid.

In said drawings, A represents the shaft upon which my improved chuck is mounted.

13 represents a hollow tube or core upon which the web of paper C is rolled.

In carrying out my invention I construct a central plug a, bored to fit the shaft or mandrel, and provided on its outer surface with Serial No, 613,624. (No model.)

raised ribs a, three in number in the present instance, undercut at the sides, each being provided with a central longitudinal groove Z) in the outer surface thereof, said plug being smaller in circumference at the inner extremity than at the outer extremity and tapering uniformly. Mounted upon said plug is an adjustable sleeve composed of three sec tions 0, each section being provided at its opposite sides with a lip (Z, adapted to engage with the undercut edges of said ribs to hold the parts together, thus avoiding the necessity of bands, clasps, or rings upon the outside for such purpose. Said sections are also provided with a central tongue 6 to engage in said groove and serve as a guide to the movements of said sections and also as a stop to limit said movements, it being understood that the sleeve has a longitudinal movement upon said plug, whereby the sleeve is made to contract and expand as it is moved back and forth upon the plug, as will be understood. Said sleeve is provided on its outer surface with longitudinal ribs f, to make it adhere more firmly to the hollow tube or core, and is also provided at the meeting edges of the sections with tongues or flanges g on one side and corresponding recesses at the other, which engage and serve as guides to the sections and to hold them into alinement with one another as they open and close in expanding and contracting when moved longitudinally on said core. In order that the circumference of the sleeve shall be uniform from end to end, the said sections must be enough thicker at the inner ends than at the outer ends to compensate for the taper of the core, as will be manifest, it being regarded as preferable to have the circumference of the sleeve uniform from end to end, rather than to have ittapering, so as to make it adhere more tenaciously to the hollow tube, as will be understood. The movement of said sections inwardly is limited by a set-screw h, inserted at or near the inner ends of the grooves, and outwardly by a shoulder or collar 2', against which the tongues e engage as the sleeve is moved longitudinally upon the plug.

When it is desired to remove the sleeve from the plug, the screws 7L need only to be backed out, as will be manifest.

It will be observed that at the base of the ribs a, at each side, are formed grooves C6, the object of which is to provide room for a sufficient body of sand to facilitate the opera tion of casting, as will be understood.

In order to secure the chuck to the shaft, I have provided said plug, near the outer extremity, with a set-screw k for the purpose; but any ordinary key or fastening may be substituted therefor, if desired.

From the foregoing it will be seen that the chuck is capable of being adjusted to a hol- 10W tube or roll for receiving a web of paper or other material very easily, quickly, and firmly, and of being released therefrom with equal facility. It will also be observed that the necessity and expense of screwing the plug upon the shaft and securing the parts by a cap and nut, as heretofore, are avoided, and that it is renderedcapable of being adjusted to any part of the shaft and to shafts of varying sizes with the greatest facility and ease.

Having thus described my invention, what I claim as new, and wish to secure by Letters Patent, is

In an eXpansible chuck having a plug mounted thereon, ribs with undercut edges and having longitudinal grooves therein,a sectional sleeve mounted on said plug, each of said sections having lips adapted to engage said undercut edges and a tongue adapted to enter said groove, flanges on each of said sections, said sections being provided with recesses intermediate of their length and adapted to have said flanges enter therein,.a collar on one end of said plug and screws'fitting in the outer end of said grooves, all of said parts being combined substantially as described.

In testimony that I claim the foregoing I have hereunto set my hand this 2d day of June, 1894:.

J AMES 0. SMITH.

YVitnesses:

OLIVER DRAKE, LOUISA BRoWNE.

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