US469036A

US469036A - Implement for sharpening pencils

Info

Publication number: US469036A
Authority: US
Publication date: 1892-02-16
Anticipated expiration: 1909-02-16

Description

(No Model.)

- H. BELLAMY.

IMPLEMENT FOR S-HARPENING. BENGILS; No. 469,036. Patented Feb. 16,1892.

UNiTED STATES PATENT OFFICE.

LIITIIER HALL BELLAMY, OF CHICAGO, ILLINOIS.

IMPLEMENT FOR SHARPENING PENCILS.

SPECIFICATION forming part of Letters Patent No. 469,036, dated February 16, 1892. Application filed April, 1891- Serial No. 387,664. (No model.)

To all whom it may concern.-

Be it known that I, LUTHER HALL BELLAMY, a citizen of Canada, and a subject of the Queen of Great Britain, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Irnprovements in Implements for Sharpening Pencils; 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 consists in certain improvements in pencil-Sharpeners, as hereinafter described and claimed.

In the accompanying drawings, Figure 1 represents a plan View of a pencil-sharpener provided with my improvements, the cover of the casing being raised. Fig. 2 is a 101igitudinal section taken on line a so of Fig. 1. Fig. 3 is a side view of the implement.

A designates the casing, which is in the form of a small box provided with a hinged cover 13. Within the box A are fixed two cones a and a, the same being provided with longitudinal openings and usually arranged on parallel lines with their large ends at apertures made in the casing for theinsertion of the pencil to be sharpened. Adjacent to the cones a a and along the same are secured the cutting-blades c and c, which are adjustable longitudinally, said blades being slotted and secured in position by means of plates 1) and screws e. The two cutting-blades are curved somewhat longitudinally, conforming to the convex surfaces of the cones against which the blades are set, and the cuttingedge of each blade, when the latter is adjusted in position, extends over and somewhat beyond the center line of the cone, the edge being slightly diagonal in position, so that at the forward end it is a little farther beyond the center line than at the rear end.

The blade, being thus curved, with its edgein a diagonal position, makes a shearing cut and the point of the pencil is less liable to be broken ofifi' in sharpening. The long cone a and blade 0 are commonly suflicient to form a point on a pencil for ordinary purposes; but

for some purposes a longer and more taper- 5o ing point is required. In such cases, after the pencil has been pointed in cone a by the blade 0 it is inserted in the cone a and the wood is cut away by the blade 0'. The cone 0/, with its blade 0, tapers at a greater angle than the other cone, and the blade 0 is adjusted so that while the blade 0 outs away the wood the leaden portion of the pencil is left to extend forward through the cone in the view of the operator as far as is necessary to form a point of the required length. A hole may be made in the casing opposite the cone a, through which the pencil-point may project for the purpose of making a point of the longest kind.

For the purpose of finishing the lengthened point of a pencil a groove 01 of peculiar construction is provided, the said groove being angular, with its opposite sides converging to a line of circular form at the bottom. The groove cl is deepest at its mouth and rear, a notch in the casing conforming to y the mouth. The bottom line of the groove being thus inclined to acircular form greatly facilitates the operation of producing a fine point on pencil. The opposite sides of the said groove are made somewhat convex, as seen in Fig. 2, and the surface of one side is provided with a file g, the opposite side being provided with a coating of abrasive material or roughened. The leaden point of the pen cil being lengthened sufficiently in cone a, it is brought to a fine point by rubbingit in the groove (Z, the convex or bulging surfaces of which enable the operator to finish the point by giving light touches at the extremity of the point.

The whole article, inclosed as described, may be made small enough to be carried in the pocket.

I claim- 1. In a pencil-sharpening device, the combination, with a casing, of two cones provided with longitudinal openings, said cones being tapered at different angles, each having a cutting-blade adj ustably secured in position for the purpose desired along each of said cones, and a groove having converging sides which are provided with roughened surfaces,

substantial-lyas -and for the purposes -de-.

scribed.

2. The combination, with a case, of a cone provided with a longitudinal opening, a longitudinally-curved cutting-blade secured in positionalongsaidcone,andanangulargroove having convex converging sides, one of which is provided with a file and the other with a 10 roughened surface, the bottom line of said groove being inclined downward in circular form to its mouth and rear, substantially as set forth and described.

In testimony whereof I have affixed my signature inpresence of two itnesses.

LUTHER HALL BELLAMY.

\Vitnesses:

G. L. CLARKE, I FRANK. MoGINNEss.