US443613A

US443613A - Arden s

Info

Publication number: US443613A
Authority: US
Publication date: 1890-12-30
Anticipated expiration: 1907-12-30

Description

(No Model.) A. S.'FITGH,

RUBBER FRASER.

No. 443,613. Patent ed Dec. 30, 1890.

v 04.4 .'...q-fam #3 NlTED STATES PATENT rricn.

ARDEN S. FITCH, OF NFAV YORK, N. Y.

RUBBER ERASER.

SPECIFICATION forming part of Letters Patent No. 443,613, dated December 30, 1890. Application filed June 11, 1890. Serial No. 355,037. (No model.)

- 1'0 all whom it may concern.-

- city, county, and State of New York, a citizen of the United States, have invented certain new and useful Improvements in Rubber Erasers, of which the following is afull,clear, and exact description, reference being had to the accompanying drawings, forming part of this specification. 4

My invention relates to india-rubber erasers; and it consists in the combination,in an eraser, of a semicircular sheath or jacket which is closed at its curved edge and open at its straight edge, and a corresponding semicircular rubber erasing-piece adapted to fit within and be inclosed by said sheath or jacket and pivot-ally united at its straight edge to the sheath or jacket at the center of the straight edge thereof, together with a lock or catch adapted to hold the eraser-piece in position when it is inclosed in said sheath or when it is rotated on its said pivot, so as to extend from the open straight edge of said sheath and be exposed beyond said edge of the sheath, as and for the purpose hereinafter set forth.

Figure l is a side elevation of an eraser containing my invention and showing the rubber erasing-piece inclosed in the jacket. Fig. 2 is a similar view of the same, showing the rubber erasing-piece rotated on its pivot to expose it beyond the sheath. Fig. 3 is a cross-section of the eraser on the line a: 00, Fig. 2. Fig. l is an edge View of the eraser with its parts adjusted as in Fig.1; and Fig. 5 is an elevation in perspective of a holder for the rubber of the erasing-piece, which is preferably employed in constructing the eraser.

A is a sheath or jacket, which is semicircular in outline or shape, and which is closed along its curved edge a and open at its straight edge a. This jacket may be made of wood or metal, preferably of thin semicircular sheets of the latter, the curved edges of which are bent toward each other and folded one upon the other at their rims, as shown in Fig. 3.

B is the erasing-piece, which is semicircular in outline or shape, and corresponds to and is adapted to fit within the sheath 'A,

passing into the same at the open straight edge thereof. The erasing piece may be constituted of a block of india-rubber, molded or cast in the required form; but it is preferable to construct it of two semicircular rigid plates 19, which are united at their straight edges, as illustrated in Fig. 5, and adapted to have a curved band or half-ring of india-rubber b, seated and clamped between their curved edges, as illustrated in Fig. 8. The plates 1) may be constituted by bending a metal disk, of suitable size, upon itself, as illustrated in Fig. 5, and providing the thus opposed curved edges of the disk with crimps, as shown at 12 Fig. 5, by which means, when the crimped edges of the bent disk are pressed or sunk into the sides of the semicircular rubber band I), as illustrated in Fig. 3, the india-rubber will be securely attached to the rim of the eraser-piece.

The eraser-piece B is pivotally united at the center of its straight edge to and between the straight edges of the sheath at the center thereof by a suitable pin or pivot c, as shown, whereby the piece B may be swung or rotated on its said pivot, so as to enter and be inclosed in the sheath or jacket A, as shown in Figs.1 and 4:, and may be rotated so as to emerge from and extend exposed from the straight edge of the said sheath or jacket, as shown in Figs. 2 and 3.

The utility of the described devices is obvious. When the eraser is not in use, the erasing-piece B may be swung into and inclosed within the sheath A, and be thus kept clean and free from contact with other objects. lVhen it is desired to use the eraser, the piece B is swung out from its sheath,and in its exposed position affords a semicircular erasive edge that is well adapted for effecting erasures from paper surfaces.

In order to hold the erasing-piece firmly in' its extended position, and also to detain it within the sheath when closed, as set forth, I provide a lock or catch on the erasing-piece, which engages the sheath when the erasingpiece is in either of the positions named. This lock may be economically formed of a rib or ribs 61 on a side or sides of the piece 13 and adapted to enter corresponding depressions d on the inner face of the side or sides of the sheath or jacket when the piece B is swung to be wholly within the sheath or swung to be wholly exposed therefrom, as shown in the drawings. A tongue 6 may be provided on the piece B and extending radially therefrom at or near the straight edge thereof and adapted to enter and be engaged in lock-notches e, formed at opposite edges of the sheath in the rim thereof, as shown. 13y disengaging the tongue from its lock-notch at one edge of the sheath the tongue may be used to push or rotate the piece B, so as to r0- tate it to its exposed position, when said tongue will enter and be locked in the notch on the opposite edge of the sheath, as illus trated in Figs. 1 and \Vhcn the erasingpiece is closed within the sheath, the reverse of the described operation of the tongue and its lock-notches is etfected. Either or both the tongues and notches or the ribs (land depressions (l' may be employed to lock the erasing-piece in its two positions, as set forth.

\Vhat I claim as my invention, and desire to secure by Letters Patent, is-

1. In a rubber eraser, the combinationnvith a semicircular sheath which is closed at its curved and open at its straight edges, of a corresponding semicircular rubber erasingpiece adapted to fit within and be inclosed by said sheath, pivotally united at the center 0t" its straight edge to and between the straight edges of the sheath at the center thereof, substantially as and for the purpose set forth.

2. In a rubber eraser,thecombination, with a semicircular sheath which is closed at its curved and open at its straight edges, of a corresponding semicircular rubber erasingpiece adapted to fit within and be inclosed by said sheath, pivotally united at the center of its straight edge to and between the straight edges of the sheath, and a lock or catch on the erasing-piece and sheath adapted to detaehably detain the erasing-piece in positions inclosed within or extended from said sheath, substantially as and for the purpose set forth.

3. In a rubber eraser, the combination,with a semicircular sheath which is closed at its curved and open at its straight edges, of a corresponding semicircular rubber erasingpiece adapted to fit within and be inclosed by said sheath, pivotally united at the center of its straight edge to and between the straight edges of the sheath, a rib or ribs on a side of the erasing-piece, and a corresponding depression or depressions on an inner face of the sheath, said ribs and depressions being adapted by the engagement of one with the other to detachably detain the erasing-piece in positions inclosed within or extended from said sheath, substantially as and for the purpose set forth.

4. In a rubber eraser, the eombination,with a semicircular sheath which is closed at its curved and open' at its straight edges, of a corresponding semicircular rubber erasingpiece adapted to fit within and be inclosed by said sheath, pivotally united at the center of its straight edge to and between the straight edges of the sheath at the center thereof, a radial tongue on said erasing-piece at or near the junction of its curved and straight edges, and lock-notches adapted to engage and de tachably detain said tongue on the sheath at opposite edges in the curved rim thereof, substantially as and for the purpose set forth.

ARDEN S. FITCH. Witnesses:

A. T. FALES, U. \V. BENJAMIN.