US600542A - Pencil-sharpener - Google Patents

Description

(No Model.) 28heets-Sheet 1.

S. D. LINCOLN.

PENCIL SHARPENER.

No. 600,542. Patented Mar. 15,1898.

WITNESSES -Z3 INVEATOJ? W ylvesi'erj Zz/ncoZn I i $4 W- .Altamey '(No Model.) 2 Sheets-Sheet 2.

PENCIL SHARPENER'. N0. 600,542. Patented Mar. 15, 1898.

WITNESSES INVENTOR W flI LncoZ w, W Atlorney Nrrm) STATES PATENT F FICE.

SYLVESTER DECATUR LINCOLN, OF ELVASTON, ILLINOIS.

PENClL-SHARPENER.

SPECIFICATION forming part of Letters Patent No. 600,542, dated March 15, 1898.

Application filed February 24, 1897. Seri 1N -624fl'79. (No model.)

To all whom it may concern:

Be it known that I, SYLvEsTER DECATUR LINCOLN, of Elvastou, in the county of Hancock and State of Illinois, have invented certain new and useful Improvements in Pencil- Sharpeners; 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 relates to pencil-Sharpeners, and has for its object to provide a machine for facilitating the sharpening of slate and lead pencils, the said machine being designed to be secured to a table or other support and embodying a reciprocating abrading-sli de and a rotary chuck or pencil-holder connected with the slide in such manner as to rotate in a direction the reverse of that in which the slide is moving, whereby the point of the pencil is subjected to a thorough cutting and reduced in a short space of time into proper condition for use.

The detailed objects and advantages of the invention will appear in the course of the subjoined description.

The invention consists in an improved pencil-sharpener embodying certain novel features and details of construction and arrangement of parts, as hereinafter fully set forth, illustrated in the drawings, and pointed out in the claims.

In the accompanying drawings, forming a part of this specification, Figure 1 is a perspective view of a pencil-sharpener constructed in accordance with the present invention. Fig. 2 is a transverse section taken centrally through the same and showing a pencil in position for sharpening. Fig. 3 is an end view of the pencil chuck or holder. Fig. 4 is a detail section taken through one end of the reciprocating slide, showing aclamp for holding the abrading material. Fig. 5 is a detail perspective view of one of the clamps, showing also the clamp-actuating spring.

Similar numerals of reference designate corresponding parts in the several figures of the drawings.

The improved pencil-sharpener contemplated in this invention comprises a suitable bed-piece 1, which is substantially triangular in cross-section and which is provided witha longitudinal dovetailed groove 2 in the inclined or beveled face 3 of the bed-piece. Arranged to reciprocate in said groove is a dovetailed slide 4, the opposite edges of which are reversely inclined, so as to engage under the undercut opposite side walls of the groove 2 for the purpose of retaining the slide in place while allowing the same to reciprocate.

The slide 4 is provided at each end with a transverse block 5, and each of said blocks is provided with a slot or recess 6, in which is arranged the handle 7 of a clamp S, the working face of which may be either smooth, toothed, or serrated, as shown at 9, for the purpose of engaging one end of the abradingstrip 10, as shown in the drawings. The outer end of the handle is providedwith a thumbpiece or head 11, by which the clamp maybe rocked out of engagement with the abradingstrip, and intermediate its ends the handle is provided with a transverse pin which enters bearing-sockets in the block at the end of the slide and forms the fulcrum upon which the clamp rocks.

12 designates a coiled spring with one terminal bearing against the handle of the clamp and the other terminal resting against and within the recess in the block, the tension of the spring being exerted to hold the clamp in engagement with the abrading-strip, while by pressing on the thumb-piece the clamp may be rocked for releasing the strip 10. The abrading-strip 10 may consist of a piece of sand or emery-paper or may be in the form of a strip of metal provided with rasp or file teeth for acting on the point of the pencil when the slide is reciprocated.

13 designates a block which is hinged at one end to the bed-piece 1 and which is pressed yieldingly toward the slide 4 by means of a leaf-spring 14, secured at one end to the rear side of the bed-piece 1 and pressing at its free end against the back of the block 13. The block is provided at its opposite ends with bearings 15, placed a suitable distance apart and receiving the ends of a revoluble chuck or pencil-holder 16. This holder is in the form of a tube provided at spaced points with fixed collars 17, which abut against the inner surface of the bearings 15 and prevent longitudinal movement of the holder. The holder is open at both ends, so as to ad abrading-surface is moving.

may be employed, one cluster arranged at each end of the holder.

19 designates a cord or flexible connection which extends between and is secured at its opposite ends to the transverse blocks at the ends of the reciprocating slide. At an intermediate point the cord or connection 19 is wound one or more times around the pencilholder 16, so that as the slide 4 is 'reciprocated the cord or connection 19 will operate on the holder to rapidly rotate the same, and by reason of the arrangement described and shown the holder 16 will be rotated in a direction opposite to that in which the slide moves, and as the slide is reversed the direction of rotation of the pencil-holder is also reversed. A gutter or trough 20 extends along the bedpiece 1 just under the slide 4 to catch the material cut from the point of the pencil and prevent the scattering of the same upon the floor or table.

In operation the lead or slate pencil is inserted through the holder 16 from the upper side and brought to bear against the abradingstrip 10. In View of the fact that the holder 16 is mounted on a pivot-block it will be seen that the taper of the point of the pencil may be regulated by pushing the pencil a greater or less distance through the holder, and when inserted to the desired extent the spring which backs up the block 13 will force the point of the pencil against the abrading-surface with the necessary pressure. The slide 4 is now reciprocated by hand, and this operation may be aided by placing a knob or button 21 on one end of the slide to be grasped by the hand of the operator. The bed-piece 1 may be secured to a table or other support by means of one or more clamps 22, attached to the under side of the bed-piece and adapted to embrace the end of the table and to be secured by binding-screws 23. As the slide is reciprocated rotary motion is imparted to the holder 16 and the pencil is caused to revolve in an opposite direction to that in which the Thus a rapid sharpening of the pencil is effected. By reason of the abrading-surface 10 being inclined the cuttings from the pencil will gravitate into the trough 20, thus making the abradingsurface self-clearing.

It will be understood that the improved pencil-sharpener hereina-bove described is susceptible of various changes in the form, proportion, and minor details of construction, which may accordingly be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination with a rigid supporting-base and a reciprocating and unyielding slide thereon having an abrading-surface, of a rotary pencil-holder having a hinged relation to said base and slide, and a flexible connection between the slide and holder whereby the latter is actuated by the form er, substantially as described.

2. The combination with a stationary base, and a reciprocating and unyielding slide having an abrading-surface, of a rotary pencilholder hinged to said base, and a spring for giving said holder a normal tendency.

8. The combination with a stationary base, and a slide having an abrading-snrface and mounted to reciprocate in right lines, of a rotary pencil-holder mounted on a block hinged to said base, a spring for pressing said holder toward the slide, and a flexible connection between said slide and holder whereby the latter is rotated by the slide as the latter is reciprocated, substantially as described.

4. The combination with a stationary base, and a reciprocating slide having an abradingsurface, of a rotary pencil-holder hinged to the base, and a flexible connection between the slide and holder and wrapped around said holder, whereby the holder is rotated by the reciprocation of the slide in a reverse direction from that in which the slide moves, substantially as described.

5. In a pencil-sharpener, the combination with a rigid base and a reciprocating and unyielding cutter, of a spring-pressed rotary pencil-holder hinged to said base, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

SYLVESTER DECATUR LINCOLN.

WVitnesses:

DEN CoRBIN, ELLA CALDWELL.

Images