US2757638A

US2757638A - Combined pencil sharpener, extension grip and eraser

Info

Publication number: US2757638A
Application number: US418350A
Authority: US
Inventors: Goldstein Isidore
Original assignee: Individual
Current assignee: Individual
Priority date: 1954-03-24
Filing date: 1954-03-24
Publication date: 1956-08-07
Anticipated expiration: 1973-08-07

Description

7, 1956 I- l. GSLDSTEIINM 2,757,638

COMBINED PENCIL SHARPENER, EXTENSION GRIP ERASER Filed March 24, .1954

IN VEN TOR. IswoRE GOLDS'IEIN United States Patent COMBINED PENCIL SHARPENER, EXTENSION GRIP AND ERASER Isidore Goldstein, New York, N. Y.

Application March 24, 1954, Serial No. 418,350

4 Claims. (Cl. 1201) This invention is a device selectively usable to extend the length of a pencil, protect its point when not in use, sharpen said point, and afford an eraser whenever needed.

Important objects of the invention are to insure the firm gripping of the pencil; effectively center the pencil during sharpening; permit the gripping of pencils of different diameters and cross-sectional shapes; and facilitate the substitution of the eraser while at the same time providing an outlet for shavings.

Another object is to provide, in one form of the invention, a structure in which, in one position of adjustment, the gripping and centering means will be freely rotatable upon the barrel having the sharpening means, to facilitate rotation of the barrel upon the pencil during sharpening, and in which, in a second position of ad justment, the gripping and centering means will be forced by the pencil itself into locking engagement with the barrel to permit use of the pencil without rotation of any part relative to any other part.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set forth.

In the accompanying drawings forming a material part of this disclosure:

Fig. 1 is a side elevational view of the device, part being in longitudinal section, a pencil being shown in position to be inserted.

Fig. 2 is a transverse section on line 22 of Fig. 1.

Fig. 3 is a transverse section on line 33 of Fig. 1.

Fig. 4 is a view similar to Fig. 1, one end being broken away, showing a modified form, the parts being adjusted for sharpening of the pencil.

Fig. 5 is a view similar to Fig. 4 in which the parts are adjusted to permit writing with the pencil.

Fig. 6 is a transverse section on line 6-6 of Fig. 4.

Fig. 7 is a transverse section on line 7-7 of Fig. 4.

In Figs. 13, the device 10 includes a tapering, elongated, molded plastic body 12 formed intermediate its ends with an axial bore 14, merging adjacent the wider end of the body into a counterbore 16 in which is fixedly mounted an annular pencil-gripping and centering means formed as a one-piece band 18 of spring metal material one end 20 of which is outwardly flanged and embedded in the wall of the counterbore 16. At its other end, band 18 is integrally formed with longitudinally extending spring tongues 22 spaced closely apart about the circumference of the band. These have their free ends normally converging in the direction of the axis of barrel 12, the terminals of said free ends being curved outwardly to a slight extent to facilitate insertion or removal of a pencil P.

At its other end, bore 14 merges into a tapered bore extension 24 communicating at its minor end with an axial passage 32 of small diameter merging into a counterbore 34 in which an eraser 36 is removably and frictionally engaged. When the eraser is removed, an outlet for shavings is provided.

Patented, Aug. 7, 1956 In use, the pointed end of the pencil P can be inserted into bore 14 and extension bore 24 for sharpening. A sharpening means is mounted in a longitudinal opening 26 of parallelogram shape arranged obliquely of the barrel axis in communication with bore 14 and extension bore 24, said means comprising a blade 28 mounted in one side edge of the opening, and fixedly held in place by an integral lip 30 formed upon said side edge.

A modification 38 includes a barrel 40 the outer shape of which corresponds generally to that of barrel 12. The barrel 40 is formed with an axial bore 42 intermediate its ends analogous to bore 14. Bore 42 would at one end merge into a tapered bore extension like extension 24, the barrel 40 being formed with a passage and an eraserreceiving counterbore such as those shown in the first form of the invention. A sharpening blade 28 communicates with bore 42, at the same location as in the first form. Thus, in the modification, the construction is identical in all respects to the first form so far as the sharpening means, eraser, and associated bores and passages are concerned.

At its base or wider end, however, the modified form is substantially different. At this end, bore 42 merges into a counterbore 44. Formed in the wall of bore 42, and communicating at one end with the counterbore, are circumferentially spaced, longitudinal recesses 46. These are spaced ninety degrees apart in the illustrated example, but the number and spacing of the recesses are not critical.

The barrel 40, at its wider or major end, is formed with.

an outwardly directed circumferential lip 48 defining a stop or abutment for an inturned lip 50 formed upon the inner end of a cylindrical sleeve 52 circumposed about the major end of the barrel. Sleeve 52, at one end, projects beyond the adjacent end of the barrel, and is formed with an inwardly directed circumferential flange 54 in the wall of which is embedded the outwardly flanged outer end of a spring steel band 56 housed in the counterbore. The inner end of the band is formed with spring tongues 58 converging toward the axis of the barrel and spaced circumferentially of the band correspondingly to the recesses 46.

The sleeve 52 is shiftable longitudinally of the barrel between the extreme positions shown in Figs. 4 and 5, respectively. If the pencil is to be sharpened, the sleeve is adjusted to the Fig. 4 position. The pointed end of the pencil is now inserted, and the body portion of the pencil will be effectively gripped by the tongues 58, said body portion biasing the tongues to the dotted line position shown in Fig. 4. The pencil will thus be effectively centered for sharpening, and the barrel may now be rotated relative to the pencil and the sleeve 52, without destroying the alignment of the pencil with the barrel.

If the holder is to be applied to the butt end of the pencil, said butt end is inserted as in Fig. 5, the sleeve 52 being shifted to its other extreme position. The tongues are aligned with the recesses and are biased outwardly by the inserted body portion of the pencil into said recesses. As a result, the sleeve is locked against rotation relative to the barrel, and no parts will turn during the normal use of the pencil.

While I have illustrated and described the preferred embodiments of my invention, it is to be understood that I do not limit myself to the precise constructions herein disclosed and the right is reserved to all changes and modifications coming within the scope of the invention as defined in the appended claims.

Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent 1s:

1. A combination device of the class described comprising a barrel, means associated therewith to grip a pencil inserted in the barrel, and sharpening means carried by the barrel adapted for re-tipping the gripped pencil, the barrel being formed with an axial bore and a counterbore with which said bore communicates, said pencil-gripping means being extended within said counterbore, the pencil-gripping means including a sleeve circumposed about the counterbored portion of the barrel and a band fixed to the sleeve and formed with circumferentially spaced spring tongues extending within the counterbore and tensioned to grip the inserted pencil, said sleeve being rotatable on the barrel to permit rotation of the barrel relative to the pencil and pencil-gripping means during sharpening of the pencil.

2. A combination device of the class described comprising a barrel, means associated therewith to grip a pencil inserted in the barrel, and sharpening means carried by the barrel adapted for re-tipping the gripped pencil, the barrel being formed with an axial bore and a counterbore with which said bore communicates, said pencil-gripping means being extended within said counterbore, the pencil-gripping means including a sleeve circumposed about the counterbored portion of the barrel and a band fixed to the sleeve and formed with circumferentially spaced spring tongues extending within the counterbore and tensioned to grip the inserted pencil, said sleeve being rotatable on the barrel to permit rotation of the barrel relative to the pencil and pencil-gripping means during sharpening of the pencil, said sleeve being shiftable longitudinally of the barrel between opposite extreme positions in one of which the sleeve is free to rotate upon the barrel, and in the other of which the sleeve is held against rotation relative to the barrel, the barrel having recesses receiving the tongues in the second-named extreme position to hold the sleeve against rotation.

3. A combination device of the class described comprising a barrel, means associated therewith to grip a pencil inserted in the barrel, and sharpening means carried by the barrel adapted for re-tipping the gripped pencil, the barrel being formed with an axial bore and a counterbore with which said bore communicates, said pencil-gripping means being extended within said counterbore, the pencil-gripping means including a sleeve circumposed about the counterbored portion of the barrel and a band fixed to the sleeve and formed with circumferentially spaced spring tongues extending within the counterbore and tensioned to grip the inserted pencil, said sleeve being rotatable on the barrel to permit rotation of the barrel relative to the pencil and pencil-gripping means during sharpening of the pencil, said sleeve being shiftable longitudinally of the barrel between opposite extreme positions in one of which the sleeve is free to rotate upon the barrel, and in the other of which the sleeve is held against rotation relative to the barrel, the barrel having recesses receiving the tongues in the second-named extreme position to hold the sleeve against rotation, said recesses being formed in the wall of said axial bore and communicating at one end with the counterbore.

4. A combination device of the class described comprising a barrel, means associated therewith to grip a pencil inserted in the barrel, and sharpening means carried by the barrel adapted for re-tipping the gripped pencil, the barrel being formed with an axial bore and a counterbore with which said bore communicates, said pencil-gripping means being extended within said counterbore, the pencil-gripping means including a sleeve circurnposed about the counterbored portion of the barrel and a band fixed to the sleeve and formed with circumferentially spaced spring tongues extending within the counterbore and tensioned to grip the inserted pencil, said sleeve being rotatable on the barrel to permit rotation of the barrel relative to the pencil and pencil-gripping means during sharpening of the pencil, said sleeve being shiftable longitudinally of the barrel between opposite extreme positions in one of which the sleeve is free to rotate upon the barrel, and in the other of which the sleeve is held against rotation relative to the barrel, the barrel having recesses receiving the tongues in the second-named extreme position to hold the sleeve against rotation, said recesses being formed in the wall of said axial bore and communicating at one end with the counterbore, the tongues being tensioned to normally shift radially and inwardly of the barrel out of the recesses in the secondnamed position of the sleeve, said tongues being adapted to be biased outwardly by the inserted pencil to lockingly engage in the recesses.

References Cited in the file of this patent UNITED STATES PATENTS 895,019 Hopkins Aug. 4, 1908 895,188 Mueller Aug. 4, 1908 1,193,351 Bosshardt Aug. 1, 1916 1,636,552 Clare July 19, 1927 1,779,910 Kisson Oct. 28, 1930 1,800,118 Tussing Apr. 7, 1931 2,514,761 Havnen July 11, 1950