US819104A - Pencil-sharpener. - Google Patents

Description

PATENTED MAY 1, 1906.

J. A. WEBSTER.

PENCIL SHARPENBR APPLICATION TILED 21m. 1904.

2 SHEETS-SHEET 1v v INVENTOR John H. Webs/E7".

BY y mik No. 819,104. PATENTED MAY 1, 1906. J. A. WEBSTER.

PENCIL SHARPENBR.

APPLICATION FILED FEB.5,1904.

2 SHEETS-SHEET 2.

.Figcef UNITED STATES PEENT OFFICE.

JOHN A. W'EBSTER, OF NEW YORK. N. Y., ASSIGNOR TO FLORENCE A. MORRISON, OF NEW YORK, N. Y.

PENClL-SHARPENER.

Specification of Letters Patent.

Patented May 1, 1906.

To all whom, it may concern.-

Be it known that I, JOHN A. WEBSTER, a citizen of the United States, residing at New York, borough of Brookl in the county of Kings and State of New ork, have invented certain new and useful Improvements in Pencil-Sharpeners, of which the following is a specification.

v This invention relates to pencil-Sharpeners, and is designed as an improvement upon the pencil-sharpener patented to me January 9, 1900, No. 640,846.

In my former patent the cutter is shown as coneshaped in form with spiral blades integral with the same. In my present invention I have provided a cylindrical cutter with spiral blades, said cutter being mounted in a special way, so as to brin the encil in contact therewith at an ang e; a rther object being to provide means for ad'usting the pencil-bearing block to insure t e best results, especially when the cylinder is reduced in size by grinding; a further object bein to provi e improved facilities for assemb 'ng and holding together the several parts and in providing a simple and efficient clutch to old the pencil.

I accomplish the objects of my invention by the construction and arrangement of parts, illustrated in the accompanying draw IDOS, inwhich- I igure 1 is a sectional elevation of a penoil-sharpener constructed accordin to my invention on the line 1 1 of Fig. 2: i 2 is a front elevation thereof with parts roken away to show the construction, and Fig. 3 is a view of the pencil-holder with the facelate removed. Fi A is an edge view, and ig. 5 a view upon t e inner side of the faceplate 28.

In the accompanying drawings like numerals of reference refer to the same part in each of the views, and in practice I provide a pencil-sharpener consisting of a casing 5, provided with a bearing 6, in which the hub 7 of the frame 8 rotates, said frame consisting of two disks 9 and 10, connected by a block 1 1, and of a len 'th substantially the same as the interior of t e' 11 per part of the casing 5, as clearly shown in ig. 1. In the opposite side of the casing I provide a bearin 12, in which the end 13 of the bearing-bloc M rotates, said bearing-block being passed through the ing thereof, and the shaft 18 is provided with'adisk 10 in a tight manner, and the end of the bearing-block forms the spindle for the adj acent end of the frame 8. I also provide a handle 15, screwed upon the end of the hub 7, as clearly shown, so that when the handle is rotatedto the ri ht the hub 7 will be rotated and with it the frame 8 and parts connected therewith, as will be readlly understood. The handle 15 may be detached from the hub by holding the frame 8 a ainst rotation and turning the handle to the left.

Mounted between the disks 9 and 10 opposite the block 11 is a cylinder 16, having spiral blades 17, said cyhnder being held at an angle to the axis of rotation, as clearly shown in the drawings, and being secured to the shaft 18, one end of which is mounted in the bearings 19 in the disk 9 and the other end bein mounted in bearin s 20 in the disk 10, saidiearings being bore at an angle to the disk, so that the shaft 18 is held at an angle to said disks, thereby holding the cylinder 16 at an an le to the axis of rotation, as previously state On the end of the shaft 18 is a beveled inion 21, which bears against the inclined ace 22 of the disk 10, and in the adjacent end of the cylinder 16 is a bushing 23, through which the shaft 18 passes, and m the opposite end of the said cylinder is a bushing 24, havan interior screw-thread at the inner end screw-thread 25, which engages the screwthread in said bushing, and the shaft is also provided with a shoulder 26, so that by turning the shaft 18, by means of the slot 26 in the end of the pinion 21, the bushing 23 is drawn against the shoulder 26 and the shaft 18 is held securely in osition.

The face-plate 28 o the casing is provided with an annular flange 29, in each side of which is a bayonet-slot 30, opening in a direction so that when the frame 8 is rotated to the right the friction of the end 13 of the pencil-sharpener in the bearings 12 will tend to engage the slots 30 with two pins 31 in the sides of the casing 5, thereby holding the face-plate securely in position, as Wlll be readily understood, while b turning the face plate a short distance in-t e opposite'direction the plate can readily be removed, as will also be readily understood. On the interior of the face-plate 28 I inount an internal gear 32, Which I prefer to make of brass and which may be stamped out by a die as a cheap way to manufacture the same; but the pinion 21 I prefer to make of steel, so that a limited rotation of the beveled pinion 21 in engagement With this internal gear will cut the edges of the teeth of the gear sufficiently to make a practically smoothrunning connection without goin to the expense of making an internal beve ed gear. The face-plate is also provided with a pencil-holder consisting of a plate 33, provided with angled slots 34 and 35, which engage pins 36 and 37, respectively,

- in the jaws 38 and 39, said slots being directfrom it, as will be understood, while the pinl ed downwardly and inwardly, while a spring 40, as shown in Fig. 1, mounted on the pin 41,

secured to an an led extension 42 of the plate- 33, normally ho ds the plate in an elevated position, With the pins at the bottom of the slot, as shown in Fig. 2, so that the jaws are substantially in contact with each other, as shown in this figure. When it is desired to insert a pencil to be sharpened, the plate 33 is pressed downward in opposition to the spring 40, and the travel of the pins in the slots 34 and 35 forces the jaws outward, thereby al.- lowing the insertion of the pencil between the same, when on releasing the plate 33 the spring will force the same upward, thereby forcing the jaws inwardly upon the pencil, accurately centering the same and assisting in holding the pencil against rotation.

The pencil-bearing block 14 is provided with a conical groove 42, which opens through the end 13 adjacent to the pencil-holder, just described, and this block is provided with an extension 43, which passes into the hub 7, and a screw 44 is in engagement with this extension 43, while the pin 45, in engagement with the slot 46 in the side of said screw 44, limits the motion of the screw, so that by rotating the same theencil-bearing block is drawn toward the cy indrical cutter or forced away 56, passing through the block 1 1 of the frame 8, engages the slot 47 in the bottom of this bearing-block and prevents therotation of the same relative to the cutter 16, and this slot being longitudinal allows of the adjustment of this bearing-block, as previously described. I

I may also provide a shavin s-box 48, which I mount in the bottom of t 1e casing 5, and it will also be necessary to have a faceplate 49 to hold the jaws 38 and 39 in position. 1

The operation is as follows: A pencil is insorted between the jaws 38 and 39, which grip the same by reason of the action of the spring 40, and the pencil may then be forced on inwardly by gently pushing against the same until the end comes in contactwith the cylindrical cutter 16 while being held against tl e same b the bearing-block 14, and as this bearing b ock is provided with a conical oil is groove 42 and the'cutter 16 is held at an angle to the axis of rotation it is evident that by forcing the pencil inwardly against this cutter whilethe same is beingrotated the wood and lead will be cut away to form a fine point, While the shavings will be dropped into the the box 48. By rotating the frame 8 with the handle 15 the disks 9 and 10 will rotate and carrywith them the cutter 16, and as this cutter is mounted on the shaft 18, which carries the pinion 21 in contact with the fixed internal gear 32, it is evident that the cutter will.

be caused to rotate on'its axis while being carried around the pencil on the axis of the frame 8, thereby bringing the spiral blades in engagement with the end of the pencil to cut away the wood and lead thereof, as previously described.

When the blades 17 of the cutter become dull, they may be reground, and the frequent repetition of this act will cause the cylinder to be reduced in size; but this reduction will have no effect until the cutter is very materially reduced in size, owing to the 'adjustability of the bearing-block 14 by reason of the screw 44.

While the pencil-bearing block, together with the cutter 16, rotates it is necessary that the pencil itself be held against rotation, and as the pencil-holder is fixed to the face-plate, which does not rotate, and as the grippingjaws }grip the pencil very effectively, the peneld against rotation, so'that the cutter acts on all sides of the same.

Asthe end of the screw 44 reaches to the end of the hub 7 or adjacent thereto it is evident that the pencil-bearing block can be adjusted without opening any part of the casscribed, in conjunctionwith pins in the sides of the casing, it is evident that the rotation of the frame in the act of sharpening the pencil will more firmly seat these pins in the slot to hold the face-plate in-position, as the faceplate must turn in a direction opposite to the movement of rotation of the frame and cuttiars to unseat the pins from these bayonets ots.

It will thus be seen that I have produced a very effective pencil-sharpener and means for assembling and securely adjusting and holding the same in fixed relative positions and at a minimum cost to manufacture;

Having thus described my invention, what I claim as new, and desire to secure by Letthe said disks at an an le to the .disks, the

shaft 18 fitted to the sai bearings, the sharpening-cylinder 16 carried by c :said shaft and gearing arran ed and operated to rotate the sharpening-0y inder when the frame is turned by the crank.

2. In a pencil-sharpener, the combination of the frame comprising the disks 9 and 10 with the block 11 connecting the same, bearings at opposite ends of the frame, a crank for rotating the same, bearings 19 and 20 in the said disks at an angleto the disks, the shaft 18 fitted to the said bearings the shar ening-cylinder 16 carried by the same sha t, the pinion 21 upon the end of the shaft 18, the face-plate 28 having the internal gear 32 fitted to the pinion, and a casing having the faceplate secured detachably thereon and holding the parts in an operative relation.

3. In a pencil-sharpener, the combination of the frame comprising the disks 9 and 10 with the block 11 connecting the same, a casing provided with bearings for the opposite ends of the frame and having a box 48 to receive the shavings, a crank for rotating the frame in the casing, bearings 19 and 20 in the said disks at an angle to the axis of the disks, the shaft 18 fitted t0 the said bearings, the sharpening-cylinder 16 carried by said shaft and gearing arran ed and operated to rotate the sharpening-0y inder when the frame is turned by the hand-crank.

4. In a pencil-sharpener a frame, a shaft mounted in the opposite sides thereof, a cylindrical cutter mounted on said shaft, and i bushings in the opposite ends of said cutter, one of said bushings being provided with an interior screw-thread, and the shaft being provided for a portion of the length thereof with a screw-thread adapted to engage said bushing, as and for the purpose set forth.

5. Ina encil-sharpenera frame and means to rotate t e same, acylindrical cutter mount- J ed in said frame at an angle to the axis of ro- I tation thereof, a pencil-bearin block mounted at the axis of rotation, an means to adjust said bearing-block longitudinally along said axis, for the urpose set forth.

6. In a pencil-s arpeneraframe and means to rotate the same, a pencil-bearing block rovided with an extension passing into the ub of said frame, a screw passing into said hub, and engaging with said extension of the bearing-block, and means to prevent the longitudinal movement of said screw, for the purpose set forth.

7. In a pencil-sharpener a frame and means to rotate the same, a pencil-bearing block provided with an extension passing into the ub of said frame, a screw passing into said hub, and engaging with said extension of the bearing-block, and means to prevent the longitudinal movement of said screw, said bearing-block being provided with a longitudinal slot, and a .in in said frame adapted to engage said slbt, as and for the purpose set forth.

8. A pencil-sharpener comprising a casing a frame mounted therein, and means to rotate the same, a cylindrical cutter provided with spiral blades mounted in said frame and provided with a pinion, an internal gear fixed to said casing and in engagement with said pinion, and a pencil-bearing block and means to adjust the same, and a pencil-holder adapted to grip the pencil and hold the same against rotation, as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

JOHN A. WEBSTER.

Witnesses:

ETHEL T. CooKE, JAMES E. BLOOMER.

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