US337505A - Chaeles la dow - Google Patents

Description

(No Model.)` C. LA DOW.

- j B RASBR. No. 337,505.

{'7 mi. agua? Patented Mar. 9, 1886.v

@Miren STATES Aram OFFICE.

CHARLES LA DOW, OF ALBANY, NEW YORK.

ERASER.

SPECIFICATION forming part of Letters Patent No. 337,505l dated March 9, 1886. Application tiled December 14, 1885. Serial No. 185,582. (lilo model.)

.T0-@ZZ whom t may concern:

Improvement in Erasers, of which the following is a specification.

My invention relates to erasers which may be used alone or in connection with a penholder or a lead-pencil 'or like implements;

and the object of my invention is to provide a rubber eraser whose surface shall be exposed for use as needed and adapted to be more or less exposed, according to the pleasure of the user, and also to provide a rubber eraser so sheathed that it may bc unsheathed for use as the same is worn away, and that it may be unsheathed automatically; and the further object of my invention is to provide such an eraser adapted to be attached to and operated automatically on a pen Aor pencil holder, and also to be used in connection with a blade eraser or file. I attain these objects by means of the instruinentalities shown in the accompanying drawings, which drawings are made a part of this speciiication, and in which- Figure 1 is a longitudinal section of pencil and eraser device, showing pencil A, sheath B, rubber plug or eraser C, and space D between sheath and rubber, in which the knifeblade and iile b d play, being clamped by stud .fr to encircling ring f on the outside the sheath y, and a being correlative screw-threads onl the pencil and sheath. Fig. 2 is adrawing of the same design, showing slit i in the sheath for adapting the same to pencils or holders of different thicknesses, and showing e, a slot in the sheath, in which shank ar plays, to allow the ring f motion up and down the sheath. The knii'eblade d is extended and shown (b) in dotted line withdrawn in the sheath. Fig. 3 is a transverse section through the erasing device at x, showing erasing-plug C and the sheath B bent angularly away from the eraser to allow the knii'eblade to play within the sheath independently of the rubber eraser, also showing the ringf conforming to the angularity ofthe sheath. Fig. 4 shows a modi cation of the device for screwing the sheath up or down on a pencil or holder, p being a peg in the pencil, which acts as a screw-thread.

Fig. 5 shows pegp acting in a slot, g. Fig. 6 shows the sheath provided with sloth, adapted to allow the same to be moved up or down on the holder; Fig. 7, a knife-blade operated by means of a stud, x, without a ring.

To carry out my invention, I construct a tube, B, of convenient size and proportion, of suitable material, preferably of metal, and raise a rectangular groove on one side along its length, adapted to receive a narrow blade, as shown, B and b, Figs. l, 2, and 3. In this grooved part I cut a slot, e, and upon this tube or sheath I mount a ring, f, adapted to slide upon it, being angled to conform with it, (saine iguresf.) The blade d is attached to this ring by a stud or bolt, x, the blade being within the rectangular groove D, and the ring without the tube, and the bolt a passing throughA the sheath and playing in the slot e. By this means when the ringf is moved along the sheath or tube B the blade cl,with its file, is protruded from the sheath beyond the rub ber eraser C, as shown, Fig. 2, and when the ring is withdrawn the blade is sheathed, as at d, Fig. l, or dotted line, Fig. 2, so that the rubber eraser is left protruding for use.

The sheath is adapted to contain a plug or piece of rubber of suitable size and composition for erasing purposes, and to retain this rubber by friction so its rear end shall rest on the top of the pencil or pen holder or other suitable stop or handle.

The end of the pencil or holder I cut into screw-threads a, Figs. l and 2, or I mount an equivalent metal threaded tip on the holder, upon which the sheath or tube B is adapted, by the corresponding male thread, i, to be screwed backward or forward. Obviously by this construction as the sheath is screwed downward or backward upon the holder or pencil the elastic eraser C is made to protrude from the sheath for use, and is held in position iirml y by friction with the sheath,and thus as the eraser is wornv away in use it can be automatically renewed at the will of the user till the rubber is exhausted, when a new plug of rubber can be inserted in the sheath When the sheath is moved in the other direc'- tion, (upward or forward,)the rubber plug may be pushed back in the sheathv till it rests on the end of the pencil, so that when the rubber is not in use it will be wholly inclosed and` protected in the sheath and held there by frictional contact therewith.

The sheath is removablefor the insertion of new elastic erasers, and may be rectangular' or polygonal and the eraser of similar shape.

By t-his structural arrangen'ient obviously the elastic eraser is firmly held in any position in the sheath by frictional contact therewith, and the knil`e-eraser or the rubber eraser may be protruded for use independently and at will.

The slot t, Fig. 2,'in the screw-thread ot" `volvinfbr the sheath upon the handle A or pencil end it will be moved up or down, as the case may be, on the pencil, and cause the rubber to protrude or be withdrawn in the manner bel'ore explained.

Another modification I construct, as shown in Fig. 5, by cutting.;` aweaving` or curving;` slot in the sheath, at g, in which the peg p plays, by which means in like manner the sheath may be worked up or down to protrude the eraser.

In the last two modifications the blade'eraser is mounted on the sheath in the manner before described, and preferably on the side of the sheath opposite the peg-slot.

The slot 7L (shown in Fig. 6) is a modification adapted to hold the sheath on the pencil or handle by friction, allowing it readily to be moved up or down thereon to protrude the rubber eraser. rllhe bladceraser may be mounted on the sheath or tube by means ot' astnd merely, instead of the ring,` before described, as shown in Fig. 7 at m, the stud being, like ring f, Figs. l and 2, adapted Ato play in the slot e, to be pushed forward and backward therein for the purpose of protruding or withdrawing the bladeerascr.

Either the ring or stud with the knife-blade or tile or blade-eraser may be used with the various constructions ofthe sheath B,as herein described, or this eraser may be dispensed with, or be used alone, the rubber eraser being dispensed with. W'hen the rubber eraser is used alone in this construction, the sheath may be constructed without the longitudinal groove angled outward, hereinbefore described and shown, Fig. 3, B at b.

The method of construction and operation and the advantages of myinventionwill be obvious to those skilled in the art from the foregoing description.

I am aware that pencils have been made with the erasive material rigidly attached' thereto and provided with a shield adapted loosely to cover the eraser.

Vhat I claim as of my own invention, and

desire to secure by Letters Patent, is-

l. The sheath B, the pencil A, engaging the sheath-screw, and the elastic eraser C, held in said sheath frictionally and movable therein.

2. The pencil or holder A, having,` a peg or other equivalent mechanism near one end to engage the sheath-screw, the sheath B, which incloses said end, and the elastic eraser C, held inclosed in said sheath frictionallyV and movable therein.

3. The metal eraser d and its attachments and the elastic eraser C, in combination with a tubular inclosing-sheath, B, in which they are lodged, and whereby they are mounted on a suitable holder, A, the sheath being movable upon the eraser C and holder and coacting therewith when moved thereon to protrude or withd raw the eraser C.

4. The holder A, having a peg set near one end to engage the sheathscrew, the sheath B, which incloses said end, the elastic eraser C, held inclosed in said sheath by friction, and the metal eraser d, inclosed in said sheath and operated therewith by the ring or stud x through a slot in said sheath, substantially as described.

CHARLES, LA Dow.

Wit-nesses:

WM. P. RUDD, FREDK. Hamers.

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