US1254539A - Pencil-sharpener. - Google Patents

Description

PENCIL SHARPENER. APPLICATION FILED Amm, 1917.

. W/Tll/ESSES naaaeaa, l

. Fig.r3 isa detail in sect antenas .emanan nein-iunafivn iatures cnnisrraiv am., or rnrnannrrnra, run-usar.-

. venia runnin-surname.

To all whom t may concern .Be it iknown that" we,'ll`noMAs ALFRED A Runnin and N IELs CHRISTIAN AHL, citizens of the 'United States, and residents vof Philadelphia, in the lcountyofPhiladelphia and State oi' Pennsylvania, have invented a new and improved Fencil-Sharpener,'o3t` which the following isla full, clear, and exact description.

@ur invention relates more particularly to that type of pencil Sharpeners in which a cutter head is revolublymounted and provided with cutters to accommodate the pencil. A An object of -our invention is to provide a pencil Sharpener of the indicated type havingan improved drive means including a balance wheelon the shaft carrying. the cutter head and adapted to be given momentum by a drive wheel engaging the same andarranged to be .actuated from the exterior of the Sharpener by tangential pressure thereon by the hand of the operator against the periphery of thevactuating wheel, or equivalent impetus .given to said wheel by the operator. l

An important object of the invention also lis to provide a cutter head having knives and guide rollers so arranged thereon as to give the pencil a uniform taper. ln thepreiterred form the inventiomalso` contemplates the adjustment of the langular.relation of the cutters and the guide rollers to vary the taper ofthe sharpened pencil. rlhe. invention furthermore, may embody ladditional guide means particularly useful. in sharpenling pencils to a long taper as required by -artists for example.

Reference is to be had to the accompany'- ing drawings forming a part ot this speci.

cation in which similar reference characters indicate correspondingparts in all the Figure 1 is a central vertical sect-ion of a' pencil Sharpener embodying our invention; y Fig.- 2 is a fragmentary transverse vertical section taken on the line 2 2, Fig. 1

nal plan'v-iewon Kthe line 3 3, Fig. 1; l' .-2

Figs. 4:, 5A and 6 are respectively horizontal sections on the lines 5 5, and`6-6, Fig.7 isa detailin sectional plan .view on l the line 7 7, Figi, the view being made on a reduced scale;

Specication of Letters Patent. L Fatmmgd ,Mmm 29 1mm, Apjgvleationl led August 9, 1917. Serial No. 125,270. i i

Fig 8 is a detail in' verticalsection on the line 8 8, Fig. 7 i' Fig. 9 is a perspective view of one of the knives; p

Fig. 10 is a partly sectional side elevation of a modified cutter head having the knives and guide rollers in iixed positions.

Referring more particularly to the form suitable .hollow base 10 `is provided having a bottom ll and a-cap 12, said parts being preferably in practice `produced from sheet metal. A glass dome 13 rests on the base 10 spring pressed frame 22a' pivoted as at 22bv land acted on by any suitable spring 22,

whereby the :trame and drive wheel may be swung into or out of driving connection with the shaft 19. The said drive wheel 21 projects laterally through an opening in a. side of the base 10 between brackets 23 housing the major portion of the projecting part of the wheel leaving the periphery of said Wheel exposed. By the operator grasping, or frictionally engaging the wheel -21 by a tangential. movement of the hand, sucient momentum is given tothe shaft 19 with its power wheel 21 to store up the power necessary .to give/ga sustained driving movement to the Sharpener. To prevent reverse moveof the invention shown in Figs. 1 to 7 ,ia

ment of wheel 21, a brake dog 21 pivoted at 21b is adapted to engage said wheel; 21 is a. resistance stud beneath the wheel.

The upper end of the shaft 19 extends above the top 12 and has secured thereto the cutter head 24:, the body of which generally is in the form of a shell, said cutter head being secured to the shaft'in any suitablemanner as by means of a threaded tenen 26-on the shaft to be received in a -z-'threaded socket in the under side of the v bottom 25 of the cutter head. Knives 27 as shown best in Fig.l 6 are provided in the scribed. In the top of the cutter head 24 are upper and lower concavo-.convex disks 29, 30. The lower disk 30 is formed with radial slots 31 and the upper disk 29 has eccentricslots 32 through which slots the pins 33 of the knives project, the upper ends of the pinsbeing received in a clearance' space or groove 34a in a cap nut 34-which is received on a threaded boss 30 on the disk 30, said boss extending through the center of the upper disk 29.

The cutter head 24 is provided also with conical guide rollers 35 turning in carriers 36, one bearing`37 o f each roller 35 being in the form preferably of a screw pin passing through the upper end of the carrier 36 and extending through a boss 38 thereon, said boss being disposed in a radial slot 39 of the lower disk 30 and the projecting end of the pin 37 extending -through an eccentric slot 40 in the upper disk 29, said pins pr'ojecting into the clearance space or groove 34a of the cap nut 34. The disk 29 isformed with knobs 29a whereby it may be turned, and it will be obvious that the turning of the disk 29 will cause the eccentric slots 32 and 40 to move'the pins 33 of the knives 27 and the pins 37 of the roller carriers 36 radially in the respective slots 31, 39, whereby to adjust the angular positions of the lmives and rollers relatively to the axis of rotation ofthe cutter head.

The sides of the shell 24 are formed with openings .41 for the escape of the shavings of the pencil and these may be removed through a side opening 42 in the dome 13.

The pencil A is passed through the top of the dome 13 which has an opening alining with the axisof the cutter head. Preferably in the opening is a cap 43 which may be secured by a ring 444 threaded on the neck at the interior of the dome. The neck 43'may receive a bushing 45 adapted to slide and turn therein. Said bushing is-turned exteriorly with a slight taper at its upper end 46 and said upper end is slitted longitudinally ata desired number of points as at 47 whereby a sliding clamp ring. 48 will serve to tightly bind the bushing on the pencil A. The surface of one or both rollers 35 preferably is ribbed orformed with parallel angular grooves, whereby the turning of the rollers tends to feed the pencil to the cutters. The sleeve 49 is particularly useful in forming-a long taper on the pencil without danger of breaking the point.

Inthe form shown in Fig. 10, the knives and guide rollers are fixed. In this form the shell 24a corresponding with the shell 24 is suitably secured to the shaft 19a and the `knives 27a are formed with anges 27" at the upper and lower ends, the flanges being secured by screws 27c or the like to the top 24b and bottom 24c of the shell. The rollers 352L are secured in fixed position in the top 24b by screws 49 or equivalent means.

We wish to state in conclusionthat although the illustrated example constitutes a practical embodiment of our invention, we ydo not wish to limit ourselves to the mechanical details herein illustrated, since manifestly the same can be considerably varied without departure from the spirit of the invention as defined in the appended claims.

Having thus described our invention we claim as new, and desire to secure by lietters Patent:

1. A cutter head for pencil Sharpeners, including cutters supported in said head, conical rollers in said head between the cutters, said cutters and rollers being adapted to accommodate a pencil therebetween and being inclined to the axis of rotation of the cutter head, and a tubular encil holding device revolubly and slida ly supported above the cutter head and coaxial with the latter.

2. A cutter head for encil Sharpeners, including knives, and feed) and guide rollers rockably supported at oneend in the head and radially adjustable at their opposite ends in lsaid head.

3. A cutter head for pencil Sharpeners, including cutters supported in said head, and conical rollers in said head between the cutters, said cutters and rollers bein adapted to accommodate a pencil there etween and being inclined to the axis of rotation of the cutter head, one of said rollers having ribs thereon.

4. A cutter head for pencil Sharpeners adapted to receive a pencil axially therein, a knife positioned in said head to act on the inserted pencil, and a conical roller on said,

head in position to engage the inserted pencil, said roller being roughened to have a feeding action on the pencil.

5. A cutter head for pencil Sharpeners, including cutters supported in said head, and

.conical rollers in said head between the cutters, said cutters and rollers bein adapted to accommodate a pencil there etween and being inclined to the axis of rotation of the cutter head; together with means to vary the angular positions of the said cutters and rollers.

6. In a cutter head for pencil Sharpeners,-

the combination of knives rockably supported at one end in the cutter head, concavo-convex disks on the cutter head at the opposite end, one of said disks being turnable and formed with eccentric slots, and the other of said disks having radial slots, guide rollers between` the knives, the knives and rollers being disposed at an angle to 13( :Lenawee v @i the axis of rotation of the cutter head, carone end in the cutter head and formed with. w riers for said rollers, the said knives and an oHset pin at the opposite end, and means carriers each havin a member projecting to radially move said Pin to adjust the anguthrough a radial an conical slot in the relar position of the knife in the cutter head,

spective disks, and means to turn the disk said means including a revolulole disk havliaving the eccentric slots to vary the anguing an eccentric slot in which the pin of la lar positions of the knives and rollers. the knife is received.

Y. A cutter head for a pencil Sharpener, THOMAS ALFRED RUDDLE. including a knife lrockably supported at NlUELS CHRliSTllAN

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