US375009A

US375009A - John seymour

Info

Publication number: US375009A
Authority: US
Publication date: 1887-12-20
Anticipated expiration: 1904-12-20

Description

(No Model.)

J. SEYMOUR, Dfifld. M S SEYMOUR, Exeeutrlx PENCIL SHARPENER.

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UNITED STATES PATENT OFFICE.

JOHN sEYMoUE, or AUBURN, NEW YORK MERSENA s. SEYMOUR- EXEOUTRIX on SAID JoHN SEYMOUR, DECEASED.

PENClL-SHARPENER.

SPECIFICATION forming part of Letters Patent No. 375,009, dated December 20, 1887.

Application filed October 21, 1886. Serial No. 2l6,870. (X0 model.)

To (LZZ whom it may concern.-

Be it known that 1, JOHN SEYMOUR, of Auburn, in the county of Cayuga and State of New York, have invented certain new and useful Improvements in Pencil-Sharpening Machines, of which the following is a full, clear, and exact description of the same.

My invention relates to improvements in pencil-sharpening machines in which a revolving disk with oblique throats cut through it, in each of which, by means of a set-screw, y, is fixed a knife, 2, as shown in Fig. 4.,which acts in connection with a rotating chuck; and the object of my invention is to sharpen a pencil smoothly, rapidly, and to a needlepoint without breaking. I obtain these objects by the mechanism illustrated in the accompanying drawings, in which Figure 1 is a front view of the entire machine, with sectional view of hinge at h. Fig. 2 is a sectional view of thedisk B and standardA on the line 1 2 of Fig. 1, and a side view of the plate f, shaft 9, friction-wheel a, stop-screw a, worm screw 0, and end view of chuck d and pinion :0. Fig. 3 is a perspective view of part of disk B with pencil. Fig. 4 is a sectional view of disk B, showing the throat 3, (similar in construction to that in a carpenters plane,) the knife 2, and set'screw Similar letters refer to similar parts th rough out the several views.

The mode of operation is as follows: The pencil is pushed into and through the chuck d until it reaches the stop-gage g, which is adjustable by a set-screw to the arm a, which extends from and is part of the standard A, as shown in Fig. 1. The disk B is turned on the stud O, and as it revolves the knives are drawn in an oblique direction from heel to point across the pencil. The pencil is held securely in the chuck d by means of the springs 2 1), Fig. 8, said springs being secured to the chuck d, which is part of pinion 00. (See Fig. 2.) The pinioirchuck meshes into the worm O on upper end of shaft as shown in Fig. 2.

The friction-wheel n, at lower end of shaft 9, is revolved by contact with the raised rim m of the disk B, as shown in Fig. 2.

By the above-described mechanism it will be seen that the pencil is revolved while the knives in the disk B shave it to a point, which being accomplished, the pencil is protected with revolving disks fitted with knives and working in conjunction with a revolving chuck holding the pencil have been invented; but they present objectionable features which are remedied by my invention, which consists in the peculiar construction of the disk B, the face of which is depressed at those sections marked K on Fig. 1 and bounded by the dotted lines, the throats, and the periphery of the disk. The depth of said depressions is shown at k on Fig. 4, which is about onefiftieth of an inch, or the thickness of the shaving to be cut. The surfaces of the disk behind the knives are flush with the cutting-edges of them, and as the knife leaves the pencil the wood part is supported on the flush section while the point is entirely free from contact with the disk, as seen in Fig. 1, and the lead is thus protected untilthe wood is reached by the heel of the next knife, by which it is caught as it leaves the [lush section, as shown in Fig. 3, and so repeatedly until the pencil is shaved to a point, when it is relieved from further pressure upon the disk by the stopscrew 12, thereby protecting it from breakage or waste.

Having now fully described my invention, I claim 1. A pencil-sharpening machine provided with a revolving disk having sections of its surface depressed, substantially as described and set forth.

2. The combination of the standardA with the hinged plate f, stop-screw v, and springs r1, substantially for the purpose set forth, and for the purpose specified.

' JOHN SEYMOUR.

Witnesses:

W. H. EDDY, CHAS. E. JoHNsoN.