US304900A

US304900A - Pencil-sharpener

Info

Publication number: US304900A
Authority: US
Publication date: 1884-09-09
Anticipated expiration: 1901-09-09

Description

(No Model.)

' H. A. BLANGHARD.

PENOIL SHARPENEB.

No.304,9 00. Patented Sept. 9, 1884.

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HELEN A. BLANGHARD, OF BOSTON, MASSACHUSETTS.

PENCIL SHARPENER.

SPECEFICATIQN forming part of Letters Patent No. 304,903, dated Eteptember 9, 188

Application liled March 3], 1884.

To all whom it may concern:

Be it known that 1, HELEN A. BLANOHARD, a citizen of the United States, and a resident of Boston, Massachusetts, have invented cortain Improvements in PenciLSharpeners', of which the following is a specification.

The object of my invention is to construct a simple, cheap, and effective device whereby a the action of part of the device, and Fig. 7 a

side view illustrating a modification of part of the invention.

Aisa frame or standard, to the'base of which is secured, by casting or otherwise, a projecting screw-stem, 0, whereby said standard can be secured to a table, desk, or other convenient support, or a clamp or equivalent fastener may be substituted for the screw, if de sired. The standard has at the upper end two arms, b and d, on the former of which is a bearing, a, for a shaft, f, having at the outer end a crank, f, and at the inner end a disk, 13, and

a conical cutter, D, of a construction common in pencil-sharpeners, and having an inclined knife, 9, which, however, is not secured inposition in the cutter-casing, butis adapted to a slot, in which it can be adjusted by set-screws h h and locked in position by set-screws or one adjusting-screw and one locking'screw only may be used, if desired. The cutter D hasa threaded tubularstem, m,which is adapted to athreaded openingin the end of the shaft f, and between the disk B and a shoulder, 12., on the cutter is secured a disk, F, of sand or emery paper or other abrading material, which may also be cemented to the disk B, if additional security is desired; or the disk B itself may be roughened. The arm I) is bent out over the disk B' at the upper end, and to this portion of the arm is secured abar, G, in the upper portion of which is formed a conical socket, p, the lower end of the bar being bent (No model.)

so as to overlap the edge of the disk 13 and serve as a guard, as shown.

To the end of the arm d of the standard Ais secured a stem, l-i, thesecuringbolt (1 being adapted to a vertical slot, q, in the stem, so as to permit vertical adjustment of the latter,

and a lug, s, on the arm (I being adapted to a groove, 2, in the stennin order to guide itdun ing its movement and prevent its deflection to one side or the other. The stem has at its upper end a grooved bar, 10, serving as crest for the pencil which is being sharpened, and insuring the presentation of the end of the same exactly in the center of the cutter D, the adj ustment ofthe stem H adapting the instrument for the sharpening of pencils of different diameters. .he pencil being thus supported, the end of the same is thrust into the cutter and the wooden sheathing of the lead is removed by the knife 5, so as to reduce said sheathing to a taper corresponding to that of the cutter, the knife being so set, howevcr, that it will not act upon the lead, the latter projecting into or through the hollow stem at of the cutter. When the wooden sheathing has been sufficiently removed, the penciliswithdrawn from the cutter and the projecting lead sharpened by subjecting it to the action of the cutting or abrading' disk F. During this operation the pencil may be supported by the guard G; or, if a fine point is desired, theend of the pencil is inserted into the conical socket p, which serves to direct the lead to the abrading-disk at the proper angle.

By the adjustment of the bar G on the arm I), so as to regulate the distance between the socket p and disk F, a long or short point may be produced, as shown in Figs. 5 and 6. If 'a round point is desired, the pencil should be rdtated while it is being subjected to the action of the disk 1*; but if a ila-t point is to be formed the pencil may be held in one position until the lead is flattened on one side,and then reversed sons to flatten it on the opposite side.

The instrument is preferably provided with a tray, M, for the reception of the shavings and powdered lead resulting from the opera -tions above described, this tray being suspended by hooks a: from lugs y on the arm I) in such a manner that it can be readily removed when it is desired to empty it.

The abovewlcscribcd instrument can be manufactured at a comparatively low cost, and will effect the removal of the wooden sheathing of the lead and the pointing of the latter without waste and without soiling the fingers, clothing, or surroundings of the person sharpening the pencil; and owing to the fact that the knife 9 and disk F are inexpensive, and can be readily removed and replaced by new ones when worn out, the instrument can be kept in effective working order without trouble and at slight expense.

If desired, friction, belt, or spur gearing may be used in order to drive the shaft fat a higher rate of speed than is possible when the crank is connected directly thereto. An arrangement of this character is shown in Fig. 7.

I claim as my invention 1. The combination, in a pencil-sharpener, of a frame or standard, a shaft, f, adapted to bearings therein, and a cutter, D, and abrading-disk secured to and turning with said shaft, as set forth.

2. The combination of the frame or standard, the shaft f, its cutterD,and the pencil-support w, concentric with the cutter, as specified.

.3. The combination of the standard A, having a lug, s, the stem H, having a recessed bar, 20, slot q, and groove 16, and the confining-bolt q, as described.

4. The combination of the standard A, the tubular shaft f, and the cutter D, having a tubular threaded stem, m, adapted to said F, and the cutter D, having a screw-stem, m, adapted to an opening in the end of the shaft f, and a shoulder, a, whereby the disk F is confined to the disk B, as specified.

6. The combination of the standard A, the shaftf, having an abrading-disk, F, and the bar G, located in front of said disk and bent at the lower end so as to form a pencil-support and overlap the edge of the disk to serve as a guard, as set forth.

7. The combination of the standard A, the shaft f, having an abrading-disk, F, and the bar G, forming a pencil support an d guard, and having formed on it a pencil-guide, 1 ,adj acent to the flat face of the disk, as set forth.

8. The combination of the standard A, the shaft f, having a disk with a flat abrading side, and the pencil-supportp, adjustable from and toward the flat face of the disk in a course at right angles to said face, as set forth.

9. The combination of the cutter D with the knife 9 and the adjusting and locking screws h and i, as specified.

10. The combination of the standard having I HELEN A. BLANGHARD.

\Vitnesses:

JOHN M. CLAYTON, HARRY SMITH.