US1131529A - Pencil-sharpener. - Google Patents

Description

A. LEICHT.

PENCIL SHARPENER.

APPLICATION FILED 0019,1911

1,131,529.v Patented Mar. 9,1915.

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UNITED STATES PATENT OFFICE.

ALBERT LEICHT, OF SHEBOYGAN, WISCONSIN.

PENCIL-SHARPENER.

Application filed October 9, 1911.

To all whom it may concern:

Be it known that I, ALBERT LEICHT, a citizen of the United States, residing at Sheboygan, in the county of Sheboygan and State of Wisconsin, have invented certain new and useful Improvements in Pencil-Sharpeners; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to pencil sharpeners and has for its object to provide a device of this nature, known commonly as the rotary pencil sharpener, wherein a smooth and conical point is produced and the pressure of the pencil upon the sharpening wheel may be automatically regulated.

A further object of this invention is to provide a means whereby the sharpening material carried by the wheel or drum may be removed and a new element substituted therefor.

Among the other objects of this invention is the provision of a means whereby the dust and dirt produced in the process of sharpening may be accumulated entirely within the body of the machine.

\Vith the above and other objects in view, this invention consists in the construction, combination and arrangement of parts, as hereinafter more particularly described, claimed and illustrated, in which Figure 1 is a central, vertical section of a pencil sharpener, constructed in accordance with the present invention; Fig. 2 1s a side elevation, parts thereof being in section, of the pencil retaining clamp; Fig. 3 is a fragmentary section elevation, illustrating means whereby the sharpening element is secured to the drum and adapted to carry the same; Fig. 4 is a fragmentary view of said sharpening element.

Reference being had more particularly to the drawings, 10 indicates a base of any suitable construction, having secured thereto the casing 11, said casing being mainly circular, in order to provide for the free rotation of the sharpening drum therein. A bearing or bracket 12 is secured to one side of the casing 11, and has mounted therein a shaft 13, which protrudes into the casing 11 and rests normally flush with the opposite face thereof. A sleeve 14 is mounted for rotation upon the shafts 13, and is provided adjacent to the bracket 12 with an enlarge- Specification of Letters Patent.

Patented Mar. 9, 1915.

Serial No. 653,659.

ment 15, said enlargement operating between the bracket 12 and the adjoining face of the casing 11, and is provided with a V-shaped groove 16 adapted to receive the belt, as will hereinafter be more fully described. An arm 17 projects from the sleeve 14 and carries at the outer terminal thereof, a spring drum 18, the adjoining terminals of which are adapted to be forced together by the resiliency of the material of which the drum 18 is constructed, as illustrated in Fig. 3, as will be hereinafter more fully described. The opposite face of the casing 11 and the bracket 12 is provided with a semi-circular opening 19 somewhat larger in diameter than the diameter of the spring drum 18, in which is mounted for rotation a face plate 20, said face plate being threaded into engagement with the sleeve 14 and provided with a handle 21 in such a manner that as the force is applied to the handle 21, a rotary mot1on will be imparted to the face plate 20, and consequently the sleeve 14 and the drum 18.

The abutting terminals 18 and 18 of the spring drum 18, as has heretofore been stated, are forced together by the resiliency and spring of the material of which said drum is constructed, and this construction permits the strip of sand paper or other suitable material 22 to be placed upon a spring drum when the same is contracted to be retained thereon after the terminals thereof have been moved in divergent directions. WVhen it is desired to remove this strip of material from the drum 18, an inwardly extending projection 23 is formed upon the inner surface of the terminal 18*,

and cooperates with the eccentric 24, which is pivotally mounted on the under surface of the terminal 18 It will be seen that when it is desired to remove the sandpaper from the drum the face plate 20 is removed and the eccentric 24 forced outwardly, thereby causing it to exert a pressure upon the projection 23, moving the terminals 18 and 18 in opposite directions, thus permitting the sand paper to readily be removed. A blank strip of material 25 is secured to the under side of the sand paper 22 in any suitable position, in such a manner that the projecting terminal thereof may be en gaged and the sand paper removed without soiling the hands of the operator. This strip is a piece of ordinary blank paper attached diagonally across the unden side of the jecting beyond the abradant rim to afford a means for grasping said rim when it is tobe replaced without necessitating the. op erators coming in contact with the soiled rim. The upper terminal of the casing is provided with a'depression 26, which adjoins the opening 27, and into which the pencil is adapted to be projected. A bearing 28 is mounted on the casing 11 directly above the bracket or bearing 12, and has mounted therein through the medium of a horizontal pivot a pencil clamp indicated generally as A. The bearing 28 is provided with a vertical adjustment through means of the slot and securing connections 29 and 30.

. The specific structure of the pencil clamp is-as follows: The. bearing 31 is mounted in the. bracket. 28 through the instrumentality of the diametrical lugs 32, which are pivoted in the arms of the bracket, and which provide a means whereby the bearing 31 may operate about a horizontal pivot. A. pulley 33 is mounted in the bearing 31- through the instrumentality of the depres sion 3-61, and is adapted to receive the bearing and rotatably retain the pulley within said bearing. 'I he body portion of the pulley is connected by a coil spring belt 35, with the depression 16 and the projection 15 formed onrthe'sleeve. 14. Thus,upon the rotation of said sleeve, said pulley will rotate within thebearing 3].. A follower 36 mounted in the outer terminal of the pulley 33 is adapte'd toproject therefrom by a spring 37 illustratediinFig; 3, mountedwithin the pulley 331 under the depression 3%. This follower carries a plurality of spring arms 88, which at their inner terminals are provided with the pencil engaging clamps 39, which engage: the pencil P and firmly retain the same within the pulley. These pencil engaging clamps are rotated substantially within the pulley 33, and are provided with the notches 40 which engage the depression 11 formed on the inner surface of the pulley, thus retaining the follower in engagement with said pulley.

From the foregoing it will readily be seen that when the pencil P is inserted into the follower 86 and in the pulley 33, the same will be engaged by the pencil engaging olamps'39, due to the spring arms 38, which converge said pencil engaging clamps inwardly, by reason of the fact that the bearing 31 is pivoted in the bracket 28 and permits the coil spring belt 35 to draw the pencil into engagement with the sand paper sheet 22 carried by the spring drum 18, as illustrated in Fig. 1. Therefore, upon the rotation of the spring drum l8 and consequently the sleeve 14, the pencil will likewise be rotated, causing the thorough and positive sharpening thereof.

A suitable drawer 42 is mounted adjacent-to the base 10 under the drum 18 and is adapted to receive all dust created by the pencil sharpening operation;

Having thus fully described my invention, what 1 claim as new, and desire to secure by U. S. Letters Patent, is

In a pencil sharpener, the combination with a split spring drum, of a sharpening surface mounted upon said drum and adapted to be secured between the terminals thereof by means of the spring embodied in said drum, a plate secured to one terminal of said drum upon the inner surface thereof at a point centrally of the sides of said drum, and a cam lever pivotally secured to the other terminal of said drum at a point centrall of the sides thereof ada )ted to en-' gage said plate, whereby the terminals of said drum may be forced apart to release TIE Gopies'ot this patent may be obtained for five cents each, by addressing the Commissioner of Patents.--

Washington, D. C.

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