US2123511A - Pencil sharpening device - Google Patents

Description

-July 12, 1938. H. LoBEL ET AL 2,123,511l

PENCIL SHARPENING DEVIC .Filed July 30, 1935 I 2 Sheets-Sheet 1 45 Maj, MGZ M HEP/WAN 05,51.

oa/.S SPA4A 7790.

INVENTORS.

f6 A A ATTORNEYS.

July 12, 1938. H. I OBEL ET AL I 2,123,511

I v PENCIL SHARPENING' DEVICE Filed July 50, 1935 2 Sheets-Sheet 2 INVENTORS.

/V/T/VESS.' BY y) n cfm I 4'? M. l ATTORNEYS.

Patented July 12, 1938 UNITED STATES PENCIL SHARPENING DEVICE Herman Lobel, Brooklyn, and Louis Di Spalatro, New York, N. Y.

Application July 30,

v 2 Claims.

This invention relates to improvements in pencil sharpening devices.

One of the several objects of the invention resides in a pencil sharpening device wherein the parts are constructed and arranged so as to enable the casing for the accumulation of the shavings, to be designed in the shape of the globe of the world, thus embodying an educational geographic feature in the device. Another feature of the invention is to provide a portable hand operated pencil Sharpener which may be placed upon a desk or other flat surface and held iirmly in one hand during a pencil sharpening operation with the other hand.

A further feature of the invention is the provision of a pencil Sharpener in which the axis of the pencil holder forms the vaxis of the globular casing, while on the exterior of the globular casing appears the map of the world thus imparting the appearance of an ordinary geographical globe of the world.

A still further object of the invention is to provide a hand operated pencil Sharpener which is novel and attractive in appearance, and inexpensive of manufacture.

With these and other objects in view which will appear in the following specication when read in conjunction with the accompanying drawings,

Figure 1 represents a side elevational view of the invention. A

Figure 2 is an end elevational view.

Figure 3 is an enlarged vertical transverse sectional view on the line 3-3 of Figure 2.

Figure 4 is a fragmentary side elevational View of the cutter unit per se.

Figure 5 is a fragmentary vertical transverse sectional view on the line 5-5 of Figure 1.

Figure 6 is a horizontal sectional View on the 40 line 6 6 of Figure 3.

Figure 7 is a transverse sectional view on the line 'I-'I of Figure 4.

Figure 8 is a detail vertical sectional View illustrating a modified form of means for releasably securing the two separable globular casing sections together.

Referring to the drawings by reference characters, and more particularly to the form of the invention shown in Figures l to '7 inclusive, the 50 numeral I0 designates a substantially flat hollow elongated base provided with an open bottom which is closed by a removable plate II held in position by fastening screws I2 which pass through the plate and thread into threaded recesses provided in the base I9. The plate il is preferably covered with a layer of friction ma-` terial such as rubber I3, although felt or other substances may be employed.

Rising upwardly from the top of the casing I0 60 adjacent one end thereof is an annular collar I4,

1935, Serial No. 33,818

(Cl. 1Z0-96) the axis of which is disposed upwardly and outwardly. Mounted in the collar I4 and extending upwardly and outwardly at an angle is a sleeve bearing I5, the inner end of which extends into the hollow base I0 while the upper end is provided with a flat head IS from which opposed posts Il extend. Supported by the upper ends of the posts lI'i is a pencil guide and holder I8, the same being held in position by screws I9 passing through the inner head 20 of the holder and threaded into the posts I'I. In addition to the head 2U, the pencil holder and guide includes a tubular sleeve 2|, the axis of which is in alinement with the axis of the sleeve bearing I5.

Journaled in the sleeve bearing I5 and extending beyond opposite ends thereof, is a tubular shaft 22, the upper end of which supports a carrier head 23 in which a pair of cutting rollers 24 are journaled. The rollers 24 are disposed in downwardly converging relation with respect to each other in order to provide a V-shaped crotch therebetween for the end of the pencil to be sharpened. rIhe upper ends of the rollers 24 are provided with beveled gears 25 which are in constant mesh with an internal ring gear 26 provided on the head 20 of the pencil guide and holder I8. The pencil guide and holder is held in a fixed position whereas rotation imparted to the carrier head 23 by rotation to the tubular shaft 22 will impart individual rotation to the cutting rollers 24.

Enclosing the pencil sharpening mechanism is a globular casing 21 comprising a lower hemispherical section 28 and an upper hemispherical section 29, the open sides of which frictionally telescope each other as at 30. The lower casing section 28 includes an outwardly extending collar 3| which fits between the bearing collar I4 and the sleeve bearing I5, thus the globular casing may be rotated about the axis of the sleeve bearing I5 and pencil receiving sleeve 2l. The sleeve bearing l5 is held xed to the collar I4 by a screw 32. The upper casing section 29 is provided with an opening 33 for the passage of the upper end of the pencil guide sleeve 2|. It is therefore possible to remove the upper casing section 29 when it is desired to reach the pencil sharpening mechanism or to empty the accumulation of shavings which are received by the lower casing section 28.

The lower end of the tubular shaft 22 extends into the hollow base Ill and carries a bevel gear 34 which is in constant mesh with an idler gear 35 supported by a bracket 36 extending transversely within the hollow base I0 and which bracket is suspended from the top wall of the base. Constantly meshing with the idler gear 35, is a driving gear 31, the said gear being supported by bracket 38 extending transversely of the base and supported from the top wall thereof. The

top wall of the base I is provided with an annular slot 39, the axis of which is in alinement with the axis of the gear 31 and the disk 40 which is formed in the top wall of the base by the formation of the annular slot 39, is supported by the bracket V38 and disposed in spaced relation with respect to the gear 31 by a washer 4|. Rising upwardly from the gear 31 and passing through the slot 39 is a pin 42 to which a crank handle or knob 43 is iixedly connected. It will therefore be seen that by imparting a turning movement to the gear 31 by the actuation of the handle 43, that power will be transmitted to the rotary tubular shaft 22 through the gears 35 and 34.

The exterior of the globular casing 21 is provided with the map of the world 44 whereby to impart to the casing the appearance of the globe of the world.

In operation, a pencil 45 to be sharpened is inserted into the sleeve 2| of the pencil guide and holder I8 and the end of the pencil to be sharpened is brought into engagement with the rotary cutting rollers 24. By pushing downwardly upon the pencil 45 and due to the angularity of the pencil sharpening mechanism with respect to the fiat base, it will be seen that the pressure imparted to the pencil tends to act against the rotary force imparted to` the driving gear 31 by the rotation of the actuating handle 43. This counteracting of the forces together with the friction surface on the bottom of the base tends to hold the device rigid during a pencil sharpening operation. It will therefore be appreciated that the device may remain portable and placed upon the top of the at desk or table for convenient use as and when desired, thus eliminating the usual practice of fixedly securing the sharpening device to a wall or other like support.

The shavings from the pencil may accumulate within the lower casing section 28, but by reason of the tubular shaft 22, it is possible in some constructions. of our invention to feed the shavings from the pencil down through the tubular shaft and into the hollow base IB from where they may be removed by the removal of the closure plate I I.

For the purpose of maintaining the cutting edges of the rotary cutters 24 in sharpened condition at all times, we provide a sharpening attachment which is supported upon one of a pair of posts 46 formed integral with the carrier head 23. The sharpening device includes a holder 41 formed of a single blank of metal, the intermediate portion of which is bent into U-shape as at 48, and the legs of the U-shaped portion straddle opposite sides of the post 46. The holder 41 extends the length of the rotary cutters and is formed with cup shaped wings 49 in which abrasive elements B are carried. The wings 49 are substantially cup-shaped in cross section Vas shown in Figure '1 and extend downwardly in converging relation in accordance with the angularity of the cutting rollers as best seen in Figure 4 of the drawings. A screw 5I freely passes through the U-portion 48 of the holder and threads into a recess 52 provided in the post 46 while a spring 53 is interposed between the U- portion and the head of the screw for yieldably holding the holder member 41 in a direction toward the sharpening rollers 24. The sharpening rollers 24 are provided with spiral cutting teeth and the said teeth constantly wipe against the abrasive elements 50 to maintain them in sharpened condition, the spring 52 serving to take up for any wear between the abrasive elements and the cutting rollers. Although the sharpening device rotates with the carrier head 23, it will be understood that the sharpening rollers 24 rotate in opposite direction and with respect to the carrier head.

In Figure 8 of the drawings, we have illustrated a modified form of means for releasably securing the hemispherical sections of the globular casing together. The casing sections are designated 66 and 61 respectively and have their open sides telescoping each other, the telescoping wall of the casing section 6E being outwardly offset as at 68. The casing sections 66 and 61 are securely held against accidental separation by means of a spring catch 69 carried by the casing section 66 and which catch has its free end seated in a recess or opening provided in the telescoping offset wall of the other casing section 61. The casing sections may be easily separated when access to the interior of the casing is desired.

While we have shown and described what we consider to be the most practical embodiments of our invention, it will be understood that such changes and modifications may be resorted to as come within the scope of the appended claims.

Having thus described the invention, what we claim as new and desire to secure by Letters Patent of the United States, is:-

1. A pencil sharpening device comprising a flat hollow base, a pencil holder fixed to said base and extending upwardly and outwardly, a rotary pencil sharpening mechanism journaled in said pencil holder, an actuating crank handle turnably mounted in the top of said hollow base, driving mechanism housed within said hollow base and operatively connecting said actuating crank handle and said rotary pencil sharpening mechanism, whereby the downward and inward presable during a pencil sharpening operation, and a removable housing carried by said pencil holder and enclosing said rotary pencil sharpening mechanism.

2. A pencil sharpening device comprising a relatively flat hollow base, a sleeve bearing rising upwardly from said base, a tubular shaft journaled in said sleeve bearing and having its lower end opening into said hollow base, a carrier head at the top of said tubular shaft, a pair of rotary. cutters journaled in said carrier head in spaced downwardly converging relation, a tubular pencil guide supported by said sleeve bearing and disposed beyond said carrier head and in axial alinement with said tubular shaft, means on said base for imparting rotary movement to said shaft to

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