US1005924A - Eraser for ink, pigments, and the like. - Google Patents

Description

FIH. BALDWIN & W. 'GRAFF. ERASER FOE INK, PIGMBNTS, AND THE LIKE.

APPLICATION FILED JUNE 30, 1910.

Patented Oct. 17, 1911.

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FRANCIS HENRY BALDWIN AND WILLIAM GRAFF, OF NEW YORK, N. Y.; SAID GRAFF ASSIGNOR T SAID BALDWIN.

EEASER FOR INK, PIGMENTS, AND THE LIKE.

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Specification of Letters Patent.

Patented Got. 17, 1911.

Application filed JuneBO, 191d. Serial No. 589,738.

To all whom it may concern:

.Be it known that we, FRANCIS HENRY BALDWIN, a resident of the borough of Manhattan, New York city, and VILLIAM. GRAFF, a resident of Brooklyn, New York city, have invented certain new and useful Improvements in Erasers ;for Ink, Pigments, and the Like, of which the following is a specification, accompanied by drawings.

The invention relates to erasers for me chanically erasing ink, pigments and the lil-ccffroni paper, parchment, and other ma terials, and its object is to provide an eraser which shall he efiicieut in service and in which preferably the part that takes the wear can be removed at small cost.

The details of the invention will he readily understood from a description of the acconu ianying drawings which illustrate our preferred embodiment of it though we, of course, do not wish to be restricted to the preferred details described.

.Figure l. is a side View of the complete eraser. Fi 2 is a central lon itudinal section showing some of the parts, however, in full. Fig. 8 is a view of the spun glass brush; and Fig. 4c is a front end-vicw of the eraser. v

At 10 is shown a spun glass brush or bundle of spun glass fibers secured by being glued into a round socket orcap 11. "his spun glass brush, as it is worn out and discarded in use, is designed to be replaced by new brushes which are readily manufactured at very small cost. Such glass brush, owing to the hardness and brittleness of the glass, has to be carefully protected and supported at its wearing end. For this reason means are provided for supporting and advancing the brush within a converging moutlu'iiece 12 through which the brush-1s protruded slightly for use, as seen in Figs. 1 and 2. Although the brush is preferably round, this mouthpiece has a rectangular mouth, the cross section of which is des igncd to snugly accommodate the protruding end of the brush while supporting and holding the individual glass fibers tightly together. The angular shape of the mouth enables the angular corners of the protruding brush end to be used for scratching out fine lines. The whole end of thebrush can he used to scratch out and erase larger areas.

, The mouthpiece 12 is'preferahly of thin metal and is round at its base or open end and screw-threaded onto a barrel or hollow shaft 14, preferably of wood, the internal diameter of which approximately fits and acts a guideway for the brush socket 11. The rear end of the barrel 14 is provided with a screw-threaded metal cap 15 which is. crimped or pinchedonto the barrel 14, or otherwise secured thereto, and receives the screw-threaded follower rod 16, the forwardend ofwhich loosely engages the cap 11 for advancing the brush into the converging mouthpiece 12 to adjust and advance the brush from time to time as its exposed end is worn away. The screw rod lb is provided with a cap 17 secured to it. and by which it- .may he turned to screw it into and out of the nut cap 15. This cap 1? is preferably provided on its exterior surface with roughened or cut surface 18 for more easily turning it to screw in the rod 16. (lap 17 covers the rear end of the barrel 14-, as shown. As the brush wears down and is advanced by screwin in the rod 16, the

@ap advances over the )arrel 14. v

To remove or insert the brush, the mouthpiece 12 is unscrewed, allowing the old brush to be withdrawn and. a new one inserted, the screw 16 being retracted sutliciently to admit the length of thenew brush within the mouthpiece. When a now brush has been put in place and the mouthpiece l2 screwed or secured in place, the cap 17 is turned until the rod [(3 pushing on the brush socket l1 advances the brush and protrudes it through the moutl-ipiccc to the dcsirod extent. The forward cud of the brush iii being thrust into the mouthpime, meets the oonvcrgin surface and is pressed into the angular sliape of the mouth as it reaches and protrudes through it. The spun glass fibers arc preferably as fine as fine hair, and

it is desirable, therefore, that the mouth fits the brush closely, so that the individual glass fibers are well supported against each other and against the edge of the mouthpiece.

WVhon c-rasing with the eraser, it may be held like a; pencil, and preferably nearly normal to thcsurfucc from which erasure is being madd. This allows the protruding brush end to wear nearly evenly; but for erasing with the small point only or along a fine line, the edges or corners of the protruding brush tip may be employed, as Will be apparent.

lVeclaim and desire to secure the following:

1. An eraser comprising a guide barrel having a screw-threaded cap at its rear end and externally screw-threaded at its fore end, an angular mouthpiece screwed onto said externally threaded end, all sides of the said angular mouthpiece converging toward its axis, an erasing brush in the said guide barrel and adapted to fit the mouth of the said mouthpiece, a cap surrounding the rear end of the barrel and prm ided with a screw rod threaded through the said screwthreaded cap and acting against the said erasing brusln 2. An eraser comprising an erasing brush, a converging mouth-piece, and means for adjusting the brush relatively to the mouthpiece and in which the mouth is of angular form, all sides of the said mouth converging piece whereby the brush projects in compressed and angularaform in cross section.

In testimony whereof we have signed this specification in the presence of two subscribing witnesses June 29, 1910.

FRANCIS HENRY BALDlVlN. \VILLIAM GRAFF. lVi tncsses FRANCIS A. STANTON, E. P. LA GAY.

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