US692584A - Metal ring for temporary binding. - Google Patents

Description

No. 692,584. Patented Feb. 4, I902.

H. T. ADAMS 8|. 0. KELLNEB. METAL RING FUR TEMPORARY BINDING.

(Application filed May 81, 1901.)

(No Model.)

I72 veniars THE Nanms PETERS co. Pnoraurho. WAQNINGYON. o, c.

UNITED STATES I P TENT OFFICE.

HENRY T. ADAMS AND OTTO KELLNER, OF CHICAGO, ILLINOIS.

METAL RING FOR TEMPORARY BINDING.

SPECIFICATION formingpart of Letters Patent No. 692,584, dated February 4, 1902.

Application filed May 31,1901.

To ctZZ whom it may concern.-

I Be it known that we, HENRY T. ADAMS and OTTO KELLNER, citizens of the United States, and residents of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Metal Rings for Temporary Binders, &c., of which the following is a full, clear, and exact description.

This invention has. for its object to provide an improved construction of metal ring more especially designed for use in connection with that class of temporary binders in which a cover having a flexible back with metal eyelets therein is employed, such eyelets serving to receive the metal rings that retain the loose sheets of paper or the like within the covers of the binder.

The invention consists in the. novel features of construction hereinafter described, illustrated in the accompanying drawings, and more particularly defined in the claims at the end of this specification.

Figure 1 is a perspective view of a ring embodying ourinvention,the ring being shown in closed position. Fig. 2 is a perspective view showing the ring partially open.

A and A denote the semicircular sections of the ring, preferably formedof spring-wire. One end of each section is flattened in the direction of the plane of the ring. The flattened ends are overlapped and the sections laterally pivoted together by a rivet B, extending through the flattened portions. The ends of rivet Bare sufficiently upset .to securely retain the sections of the ring in firm pivotal relation. The free ends of the sections are each provided upon one side with interlocking or notched faces located in planes intersecting the axis of the ringi. e., extending in the direction of the radius-each of which faces preferably comprises a groove 0. and an offset a, shaped to interlock when the ends are brought together, as shown in Fig. 1.

For convenience of description the side of each ring-section which is provided at the free end with the interlocking or notched face is termed the interlocking side, while the opposite side is termed the plain side.

As shown in the drawings, the plain sides of the ring-sections abut or are adjacent each Serial lie. 62,646. (No model.)

other at the pivot-point, while in open position (shown in Fig. 2) the confronting free ends stand in offset relation 't'. e., in different planes'-with their interlocking or notched faces remote from each other. In bringing the ring-sections together to interlocked position (shown in Fig. 1) it is necessary to posithe sections interlocked. So, also, this relation relieves the rivet B from a large part of the torsional strain and prevents the joint from soon wearing loose. To better perform these functions, the flattened pivoted ends are preferably enlarged or expanded to a greater width than the diameter of the springwire of which the sections are formed, giving a broad bearing between the ends capable of readily resisting the torsional strain and permitting the ring to be formed of smaller wire than would otherwise be possible.

Having described our invention, what we claim as'new, and desire. to secure by Letters Patent, is+

1. A spring-metal ring for temporary binders and the like formed of sections laterally pivoted together at one end, and each provided on one side at the free end with an interlocking or notched face located in a plane sides abutting at the pivot-point and said ICO interlocking sides provided at the free ends with interlocking or notched faces located in planes intersecting the axis of the ring, which free confronting ends, in open position, stand in olfset relation with said notched faces remote from each other but, by lateral stress, are brought together with said notched faces adjacent and interlocked, whereby said ring-sections are positively placed under torsional strain to hold the parts in interlocked position.

3. A spring-metal ring for temporary binders and the like formed of sections having flattened ends, overlapped and laterally pivoted together,each of said sections having a plain side and an interlocking side, said plain sides abutting at the pivot-point and said interlocking sides provided at the free ends with interlocking or notched faces located in planes intersecting the axis of the ring, Which free confronting ends, in open position, stand in ofiset relation with said notched faces remote from each other but, by lateral stress, are brought together with said notched faces adjacent and interlocked,whereby said ring-sections are positively placed under torsional strain to hold the parts in interlocked position,said flattened pivoted ends being expanded or enlarged in the direction of the plane of the ring to resist such torsional strain.

In testimonylwhereof We have signed our names to this specification in the presence of two subscribing witnesses.

HENRY T. ADAMS. OTTO KELLNER.

Witnesses:

GEORGE M. NIcoLL, S. M. WATKINS.

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