US1040048A - Pencil-sharpener. - Google Patents

Description

' J. D. STASSART.

PENCIL SHARPENER.

APPLICATION FILED DEG.Z9,1911. 1,040,048. Patented Oct. 1,1912.

2 SHEETS-SHEET 1.

l l l /N VE N TUR ATTORNEY J. D. STASSART.

PENCIL SHARPENBR.'

APPLIGATION FILED 1156.29. 1911.

1,040,048. Patented 001. 1, 1912.

2 SHEETS-*SHEET 2.

WTNESSES: /N VE IV T05 A TTOR/VEY PATENT oiriiois.A

JOSEPH D. STASSART, OF PORTLAND, OREGON.

PENCIL-SHARPENER.

Specification of Letters Fatent.

Patented Oct. 1, 1912'.

Application filed December 29, 191.1. Serial No.. 668,485.

To all 'whom it my cof/wem:

Be it known that I, JOSEPH D. S'rAssAR'r, a citizen of the United States, ,residing at Portland, in the county of Multnomah and State ,of Oregon, have invented certain new and useful Improvements in Pencil-Sharpeners, of which the following is a specification.

My invention relates to a machine for sharpening pencils, and has for its object to provide a machine of this character, in which the sharpening of the pencil is done by a single reciprocating knife moving parallel with the axis of the pencil.

A further object is to provide a machine of .simple and compact construction, so shaped as to present a pleasing appearance, and to be conveniently used on a desk or table'as a paper weight or the like.

In machines commonly used for this purpose it isnecessary to feed the pencil by hand, which is very undesirable on account of the difliculty in feeding the pencil uniformly in this manner, and because an uneven pressure on the pencil usually results in the breaking of the graphite. One great while performing the cutting operation, automatically feeds the pencil, and that therefore perfect results are always insured.

The objects and advanta es of my invention are clearly set forth 1n the following description, and illustrated in the appended drawings, in which:

Figure l is a sectional side elevation taken substantially through the center of the machine, Fig. 2 is a rear elevation of the machine with parts of the casing removed in order to disclose the operating mechanism, Fig. 3 shows a plan-view of my machine with the top-plate of the casing removed, Fig. 4 illustrates the pencil guide, and Fig. 5 is a perspective view of the base of the machine.

The casing comprises front plate a, sides b, back d, and top plate e. The sides and back are preferably made in one piece and detachably secured to the front and top plates, and in order to strengthen this con` struction I provide a bracket f, which forms a skeleton support for the whole casing, as clearly shown in the drawings.

A stud g, the lower end of which is fixed in bracket f, extends vertically to the top` late, in which it is anchored. A frame l1, 1s slidably mounted on said stud, and is ."0 is adjustably secured to frame h, and a :knife p is clamped on said bracket by means of clamping screw g. `Perforation r,

through which screw g extends, is elongated, f as shown in Fig. 2, and the knife is thereby i laterally adjustable on the bracket.

Front plate a is made with an enlarged portion s, and in this enlargement I provide a cylindrical chamber t, which acts as a receptacle for the pencil. It is noticed, that chamber t is positioned at an acute angle 1 relative to the casing, and that the bottom part of the chamber is contracted, as indi- 'cated by letter u in the drawings, so that knife p, as clearly shown in Fig. 1, in slidadvantage of my device is that the knife,-`

ing up and down the interior surface of the front plate, trilns the end of the pencil to the desired shape. It is necessary` however in a machine of this type to rotate the pencil on its axis during the sharpening operation, and this I accomplish in the following inanner. Stud gV is at the` topmade with a shouldered portion on which a star wheel wis rotatably supported, and a projection or cog fc of disk Z engages this star wheel at yeach revolution of the disk, thus imparting a slow rotary motion` to said star wheel. The latter meshes with a -second star wheel y, which is rigidly fixed on a sleeve c, and this sleeve is rotatably seated in the enlarged portion 2 of pencil chamber t. A coil spring 3 is placed under wheel y, Aand the pressure of this coil spring on the wheel is sufficient to prevent overthrow of the wheels, and perfect alinement of cog with star wheel w is thus insured. Sleeve z is made with perforations 4, in which I mount resilient lingers 5, which bear against the sides of the pencil, and thus causes the latter to rotate with the sleeve.

The operation of my device is readily understood from the foregoing description. The pencil to be sharpened is rst placed in receptacle t, whereupon crank n. is rotated by hand, causing knife 71 to reciprocate, and

moved. Base 7 of my device is made with a flange portion 8, which snugly fits into the casing. 'Ihe pencil shavings drop into this flanged portion, and are removed from time to time by simply pulling the casing and the base apa-rt. I provide the bottom `of the base with a soft felt lining, in order to prevent the machine scratching the table on which lit is placed, and thislining is indicated by reference letter 9. The lateral adjustment of the knife isl important, as it enables .the user to shift the knife on the bracket o, so as to present a fresh cutting edge, -whenever the knife gets dull at the cutting point. Bracket o is adjustably xed on frame h, in order to position the edge of the knife correctly relativento the interior surface of front plate a.

Having thus described my invention, I claim:

1. In a device of the character described, a casing, a vertical stud fixed in said casing, a frame slidably mounted on said stud, a cutter Isupport adjustably fixed on said frame, a cutter clamped on said support and adjustable laterally, hand operated meansy for reciprocating said cutter comprising, a'

disk journaled in the casing and provided with a driving pin, and a hand crank detachably secured to said disk, said driving pin seated in an elongated perforation of said frame, an inclined pencil receptacle, and means coperating with said disk for rotating the pencil.

2. In a device of the character described in combination, a casing, a vertical stud xed in the casing, a frame slidably mounted on said stud, a cut-ter support adjustably fixed on the frame, a cutter clamped on said supportand adjustable laterally, hand operated means for reciprocating the frame, a driving member rotatably fixed in said casing, ahand crank detachably secured to said driving member, a pin rigidly xed on said driving member, said pin engaging an elongated perforation of said sliding` frame, an inclined pencil receptacle, a star wheel journaled on said stud and rotated by a cog on thev driving member, a sleeve rotatably seated in said receptacle, a second star-wheel rigid on said sleeve andl meshing with said first star wheel, a coil spring operating to prevent overthrow of said wheels, and resilient'tingers secured in said sleeve and adapted to bear against the sides of the pencil, whereby the pencil is caused to rotate with the sleeve.

In testimony whereof I aliix my signature in the presence of two witnesses.I

JOSEPH D. STASSART.

Witnesses IRENE MOORE,

C. W. HILLS.

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