US1522958A - Pencil sharpener - Google Patents

Description

Jan. 13. 1 925. 1,522,958

C. H. LAND, JR

PENCIL SHARPENER Filed March 20, 1922 Patented Jan. 13, 1925.

CHARLES H. LAND, an, or nnrnorr mlorrloen, Assronon .OEONE'EHALFTTO; RUDOLF E. Eson, or DETROI MICHIGAN:

rnnoIL sHAnr Nnn.

Application filedM-arch 20; 1922. Serial No. 545,068.

To all whom it may canoe m1 Be it known that 1, CHARLES H. LAND, J r., citizen of the United States, residing-at Detroit, county of Wayne, State of Michigan, have invented. a certain new and useful improvement in Pencil Sharpeners, and declare the following to be a full, clear, and exact description of the same, such asvvill enable others skilled in theart to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to pencil sharpeners shown in the accompanying drawingsuand more particularly pointed out in thefollowing specification and claims,

In draughting rooms or other oilices Where drawing pencils are extensively used the proper sharpening of the pencil point either rounded =01 chiseledis a very im portant factor in the preparation of accurate drawings, it being essential that the pencil points should be verysharp and properly formed to produce drawings of a highstandand of execution.

The usual practice is to sharpen-the leads due to the-formationandscattering of thedust, necessitating the sharpener being placed in an inconvenient location-that the 'drawingmay not be soiled. 7

Such a device for sharpening pencils is also objectionable due to the formation of irregular points resulting-fromthe pencil being held at variable angles.-

It is therefore the object of the present invention to eliminate these objectionable features.

The primary object of the invention isto produce a sharpening device by which pencil leads may be rapidly and accurately shaped without danger of breaking their delicate working edges.

A further object is to produce a sharpening device in which the dust produced by sharpening the lead is retained within its enclosing walls;it may therefore be used directly upon the drafting board.

A further object of the invention is to provide a device in which the abrading or cutting surfaces may be easily and quickly renewed when required.

With the foregoing and other objects in View which will appear as the description proceeds the invention further resides in the combination and arrangement of partsan'd in-the details of constructionhereinafter describedand claimed, it being llIlClQl'StOOtltllzlt changes may be made in thepreciseembodiment of the inventionherein disclosedwithout departing from the spirit of the same.

In the drawings accompanying this specification:

Figurel is a perspective view of the device with the cover in place.

7 Figure 2 is aperspective view of the device with thecover removed showing its interiorconstruction.

Figure 3 is a vertical crosssectional view showing a pencil in position for sharpening the lead.

Figure 4: is aperspective view of the device showing the elastic band and abrasive strip divided, in order that both ends may flare to receive apencil, with one end-of each strip overlapping the adjacent end of the opposing strip.

Referring now to the letters of reference placed upon the drawings A, denotes a rectangular shaped-box fitted with a removable cover-Bhaving a slot B through which-a pencil may be inserted for sharpening. Secured tothe bottom of the box are two opposing-wallsC, C, having flaring ends, constructed of thin resilient sheet metal form ing in cross-section a V- shaped channel betweenthewallsz-one of the walls being relatively longer than the other. Lodged between thewalls C, C, is a looped rubber-band D witlrfiaring ends conforming to the ends of the walls (I, C, with one end of the band projecting beyond its other end. E, denotes a strip of abrasive paper or cloth looped at E to conform to the contour and length of the rubber band.

In using this device the wood is removed from one end of the pencil to expose the required length of lead. The pencil is inserted between the opposing abrasive surw. faces by way of the open loop E or between the flaring ends E at the opposite end of the box. The pencil is held in such a position that the lead only comes between the opposing faces of the abrasive material. If a chisel point is desired the pencil is reciprocated back and forth until the lead is given the desired edge. If however a tapering point is required the pencil is rotated llU as it is reciprocated back and forth until the desired cone-shaped point is obtained.

The walls being constructed of resilient material act as a spring to maintain opposing walls of the rubber band in proper relation, while the latter being of soft material.

acts as a cushion ;-thus a point of any desired degree of fineness may be obtained by varying the depth of the pencil in motion,the rubber cushion overcoming any irregularities due to the reciprocating movement of the pencil. The flare given to the abrasive strip at one end and the open loop at the opposite end of the box offers ready admission for the lead,while the extended end of the abrasive strip at the flaring end permits sharpening of the lead in spring bow pencils or compasses.

In Figure 4 both the band and the abrasive strip is shown divided and flaring at each end of the box for the ready admission of a penciL-the rubber strip and the abrasive element at one end of the box overlapping the adjacent end of the opposing rubber strip and abrasive element, whereby the lead of aspring-box pencil or the like may be readily sharpened.

Having thus described my invention what I claim is:

1. In adevice of the character described, a box-like structure; opposing elastic rubber surfaces extending longitudinally within a box-like structure including a removable slotted cover, a pair of opposing yieldable surfaces extending longitudinally within the box and a pair of opposing abrasive" strips lodged between the opposing yieldable surfaces.

4;. In a device of the character described, a box-likestructure including a removable slotted cover, a pair of walls formed of resilient sheet metal spaced apart and extending longitudinally within the box, a pair of opposing strips of rubber lodged between said resilient walls andopposing abrasive surfaces, and a pair of opposing abrasive strips lodged betweenthe opposing strips of rubber.

5. Ina device of the cha acter described, a box-like structure including a removable slotted cover, a pair of rubber bands extending longitudinally within the box, and a pair of abrasive strips lodged between the opposing surfaces of the rubber bands.

6..In-a device of the character described,

a box-like structure including a removable slotted cover, rubber bands extending longitudinally within, the box, resilient means for supporting said rubber bands in opposing contiguous relation, and. a pair of abrasive strips lodged between the opposing surfaces of-the rubber. bands.

7. In a device of the character described, a box-like structure including a removable slotted cover, a pair of walls formed of resilient sheet metal spaced apart and extending longitudinally within the box, a pair of rubber'bands in opposing contiguous relation with their ends ,fiaring apart, and

a pair of strips of abrasive material lodged, between the opposingsurfacesof the rubber bands. i

In testimony, whereof, I sign this specification in the presence of two witnesses.

CHARLES H. LAND, JR. Witnesses: V S. ETHoMAs.

IDA GOREN.

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