US445252A

US445252A - Harold p

Info

Publication number: US445252A
Authority: US
Publication date: 1891-01-27
Anticipated expiration: 1908-01-27

Description

(No Model.)

H. P. NORTON. FORM 0F LEADS, GRAYONS, 0R PENGILS.

No. 445,252. Patented Jam. 2'7, 1891.

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lllnrrn STATES' PATENT OFFICE.

llAltOlJi) l). NORTON, OF VASHINGTON, DISTRICT OF COLUMBIA.

roam or LEADS, cRAYoNs, oa PENCILS.

SPECIFCATION forming part of Letters Patent No. 445,252, dated January 27, 1891.

Application led June 19, 1890.

To @ZZ 11.171.071@ it may concern:

Be it known that l, HAROLD P. NORTON, a citizen of the United States, residing at lVashington, in the District of Columbia, have invented an Improvement inthe Form of Leads and Crayons for Pencils, Drawing-Instruinents, and other Uses, of which the following is a specification.

My invention relates to an improvement in the shape of leads, crayons, or pencils, so that they may be quickly and easily pointed, the point to be always of uniform width .for the same lead, crayon, or pencil.

The object of my invention is to make the lead ot' such a forni that by cutting it on a plane oblique to its axis a point of the desired width will be formed which shall retain as much of the original outer covering of the lead, crayon, or pencil as possible. I attain these objects bythe shape oi' the leathcrayon, or pencil, as illustrated in the accompanying drawings, which illustrate some of the forms that may be used.

Figure l is a front elevation of a lead, crayon, or pencil. Fig. 2 is a side elevation ot' a lead, crayon, or pencil, Fig. 3, a crossscction of Figs. 1 and Fig. 4C is a front elevation ol a lead, crayon, or pencil. Fig. 5 is a side elevation ot a lead, crayon, or pencil. o' is a cross-section of Figs. 4 and 5. Fig. 7 is a front elevation of a lead, crayon, or pencil. Fig. S is aside elevation of a lead, crayon, or pencil. Fig. 9 is a cross-section of Figs. 7 and Fig. l() is a front elevation of alead, crayon, or pencil. Fig. l1 is a side elevation oi a lead, crayon, or pencil. Fig. 12 is a cross-section of Figs. 10 and 1l. The above drawings show the different views of pencils with curved and plane sides with points ot different widths. Figs. 13 and 19 and 23 and 25, inclusive, are cross-sections on a larger scale, showing some ot the shapes that may be used. Fig. 20 shows a pencil fitted with an improved movable lead. Fig. 21 shows a trout and Fig. 22 a side elevation oli the pencil-point of `a drawing-instrument iitted with an improved lead.

Sim ilar letters referto similarparts throughout the several views.

rlhe shape of the lead, crayon, or pencil is such that when cut by the oblique plane the Serial No. 355,969. (No model.)

side C will form the point, the sides B being cut away, so that the point will be tapered on its sides and the side A an are of a circle or a straight line depending upon the use oi' the lead, crayon,or pencil. The width of the side C determines the breadth of the point, as for very fine points it will be formed by the intersection of the two sides B, as shown in Figs. 13, 17, and 23, and for broader points it will be of varying widths, as shown in the other figures. The sides A and C may be arcs of the same circle, but it the point is to be very broad the side O may be a straight line, as in Fig. 1G, or if the point is to be very fine the side may be the intersection of two lines. The sides B may be curves, as shown in Figs. 3, 6,13, 14:, 15, and 1G. Straight lines, as shown in Figs. il, l2, 17, 1S, 19, 223, and 25, or double curves, as shown in Fig. Z-l.

lVhat I claim as my invention, and desire to secure by Letters Patent, is-

1. A lead, crayon, or pencil of such a ferm that a section at right angles to its axis will be a polygon two ol' whose sides are arcs of the same circle, whose center is within the polygon, and two of whose sides are arcs ot' external circles, curves, straight lines, or a combination of curves andstraight lines, such that when the lead, crayon, or 4pencil is eut by a plane oblique to its axis the sides and the oblique plane will form a pointof the desired width, substantially as set forth.

2. A lead, crayon, or pencil of such a form that a section at right angles to its axis will be a polygon one of whose sides is the are of a circle whose center is within the polygon, and two of whose sides are arcs of external circles, curves, straight lines, or a combination ofcurves and straight lines, which arcs of the external circles, curves, straight lines, or combination of curves and straight lines shall intersect at an angle, so that when the lead, crayon, or pencil is cut by a plane oblique to its axis the sides and the oblique plane will form a fine point, substantially as set forth.

3. A lead, crayon, or pencil of such a form that a section at right angles to its axis will be a polygon one of whose sides is an are of a circle whose center is within the polygon, the side opposite the are a straight line, and

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two of whose sides are ares of external circles, curves, or straight lines, or a combination of curves and straight lines, so that when the lead, crayon, or pencil is cut by a plane oblique to its axis its sides and the oblique plane will form a point the width of the side opposite the arc, substantially as set forth.

fJf. A lead, crayon, or pencil of such a form ihat a section at right angles to its axis will be a polygon whose sides are straight lines, and which if it has more than three sides those which are opposite and parallel shall not be of the same length, so that when the lead, crayon, or pencil is cut by a plane oblique to its axis its sides and the oblique plane will form a point of the desired width, substantially as set forth.

5. A lead, crayon, or pencil of such a form that a section at right angles to its axis will be a polygon, (other than a regular rectangle with equal sides or a regular heXagon,) the sides of said polygon to be formed of arcs of circles, curves, straight lines, or combination of curves and straight lines, so that when the lead, crayon, or pencil is cut by a plane 0blique toits axis its sides and the oblique plane will form a point of the desired width, substantially as set forth.

In testimony whereof I afx my signature in the presence of two Witnesses.

HAROLD P. NORTON. lVitrlesses:

A. M. HUNT, W. M. MGFARLAND.