US620862A - Holman k - Google Patents

Description

Patented Mar. 7, |899.

alc-.WHEELER PENCIL SHABPENING `MAGHINE.

(Applicatiun ld Apr. 7, 1898.)

.-(nu Model.)-

NrrEn A'rENr rEicE.

noLMAN E. WHEELER, or LYNN, MAssA'onUsEfr'rs,Assicnon ori QNEQHLE i 'ro cEoEcE .r enna, or SAME PLACE. 1

Period-entspannte terroristas.

SPECIFICATION forming part of .Letters Patent No. 620,862, dated March 7, 1899.Y Application and April 7, 189s. stanno. 676,753. arman.)-

tion toy the other. The 4inner meinber14f lis formed, preferably, of thinvtubular-,metal,1;

To all whom it may concern."

Be it known that I, HOLMAN KNHEELER,

of Lynn, county of Essex, Commonwealth of Massachusetts, have invented certain lm# 5 provements in Pencil-Sharpening Machines, 4ot which the following, read in connection with the accompanying drawings, is a specification.

This invention has for its object to provide 1o a machine for sharpening pencils automatically.V

In the drawings, Figure 1 is an elevation of the longitudinal vertical section of a machine embodying this invention.- Fig.' 2 is an end vi5 elevation of the machine. Fig is a plan view of the machine. Fig. 4 shows in per'- spective the inner member of the pencil-holdn ing chuck. Fig. 5 is'a similar view of the cutter-holding shaft referred to hereinafter'.

zo Fig. G shows a section of the cutter enlarged.;

The'machine comprises a frame or body part 2, wherein is a` chamber 3, adapted for receiving the cutter 10with space above the cutter to be occupied'by the pencil and a 2 5 space below the cutter for receiving the chips and lead-du st removed by the sharpeningoperation. At the bottom of the chamber 3 is a plate 5, held in place by the ribs 6, whereon the chips are collected, and it may be re 3o' moved by the workman at will.-

The sleeve-shaft 7 has the flanged cap 8 firmly brazed toone end thereof (see Fig. 5) and is screw-threaded at the other end for receiving the screw-threaded sheave 9, and it 3 5 is designed for'rotating the cutter 10. To this end the cutter 10 is placed upon the sleeve 7 in bearing with the inner end face of the cap S and is followed up by the collar l2, after which the -sheave 9 is introduced 'and 4o vscrewed forward to. firmly clamp the cutter 10 in place between the collar 12`and cap 8. Said collar and cap, being supported for rota tion in the bearings formed therefor in the frame part 2, will in rotating cause rotation 45 'of the cutter 10. u

The pencil-holding chuck comprises'an in.- ner member 14, an outer member 16, and a spiral spring member 18, whichspring 18, being contracted between the inner and outer 5o members, normally operates to force a movement thereof longitudinally 'one with rela-A and for a portion of its length is divided into quarters by longitudinal slots 20, whereby are 55. formed the fingers 21, adapted for'movemen't inwardly when pressed upon. On 'the fingerY parts 21.are' projections 22,"which may be conveniently formed by yforcing themetal outwardly and upwardly' at such-placesgffllhese.*6o projections 22v are designed -forcoperationz Q with the beveled inner-wall` faces 24:Y of the outer chuck member 16, all this -tothegendthat longitudinal movement of theinne'r'andouter members eected by the spring 18. willjopergo 5 ate the lingers inwardly for clampinnr and holding the pencil. @bvicnsiy a 1 movement of the members ,la inthedir tion which operates the contraction'-o;e the" spring 18 will give way for the fingers to motte.. 7o outwardly and allow for the removal orfthe.. introduction and adjustment olithe penciLas' desired. The outer clinch1 mein-ber lias., the circumferential groove28,.'whereinis n; tered the forked end of the `traine projection'- 7 5 30, while its foremost end bears normallybn the frame part at the pcint. .This arrange-3 ment operates to support the chuck for movef ment rotatively, and it further allows of lon! gitndinal tilting movements o-the'chuclr'cn 8o the forked projection 30, as maybe desired for adjusting the pencil and feeding itto'the cutter. Rotation of the chuckis effectedfby a belt 34, which to .that end travels fromlthe sheave il over ythe chuck member 16. This 85 belt preferably is made' to consist of aging or round band of rubber, which is strained over the parts under a tension which'allows it te yield for the desired tilting kmovenlf'ent ot the chuck, and it normally operates-tib'hold` 9o the chuck fromy being displaced during rotation and gradually depresses thegforemost end of the chuck, as is-requiredfor feeding-'the pencil to the cutter.

Motion is primarily imparted tothe sleeve 9 5 7 through the medium ofamotor-shaft'etO, which may be economicallyfformed' Tottwo1 lines of round wire twisted spirally,on`e ab 'l g the other-in duplicate, asis shown in Fig 1T.'y Thereby each of said' wires is made 'toform lroo an inclined rib` extending spirally thelength of the shaft. :"Throughfthe end .ofcaptare .bers having the reverse inclination.

bored two intersecting circular holes 42 43 of -'diameter equal to the diameter of said wire. Sinto the opening thus made is introduced the said motor-shaft, which, being held against frotation', is reciprocated longitudinally, the ,result being to cause revolution of the sleeve Z, and-consequently the cutter and pencilholding chuck, first in one direction as the Shaft goes forward and then in a reverse direction as the shaft goes backward.

It remains to describe the cutter, which, it may be understood, is a round block of toolsteel having its peripheral face beveled toward; one end. On this beveled circular face Iare set the cutting members, which may be formed by striking up the surface material, asin the art of file-cutting. Preferably the s urface is worked over once with the cuttingtool supported at one inclination, as indicated 4by dotted lines, Fig. 6, and then worked over a second time with the cutting-tool supported at the obverse inclination, as indicated by full lines in Fig. 6. The result is to form cutting members of different inclinations. cutting the pencil while the cutter revolves in -one direction; but a reverse rotation of the cutter calls into action the cutting mem- The result is to eifecta cutting of the pencil during each rotation of the cutter; but another result isthat during the reverse movement the cutter members are cleared of the chips which may have lodged therein during the forward cutting movement. The shaft is provided with a handle 60 for convenience in operating, and preferably, too, it is concealed in part by the shell or housing 62.

The relative arrangement of the cutter and pencil-holding chuck is made such that in the beginningthe pencil shall rest upon the face of the cutter, the chuck being then raised from the bearing 3f. against the tension of belt 34; but as the cutting progresses the belt 34 draws downwardly and continuously feeds vthe pencil to the cuttcruntilthe chuck member 16 rests upon the bearing 32, at which time the pencil will have been fully sharpened and pointed, and this bearing 32 will operate to prevent overworking and possibly damaging the perfected point.

I claim- 1. A machine for sharpening. pencils comprising a cutter adapted for movement in opposite directions and 'provided with means for .cutting in bothof said directions, combined with actuating mechanism adapted for moving the cutter alternately in one and th'en in the other o f said directions, substantially as described.

2. A machine for sharpening pencils comprising a cutter adapted for movement in opposite directions and provided with means for cut-ting in b oth of said directions, combined with means for moving the cutter alternately in one, and then in the other of said directions and lneans for holding and means for Those inclined one Way operate in` feeding the pencil to the cutter, subtantially as described.

v3. A pencil-sharpening machine comprising a, cutter adapted for movement in opposite directions, and having provisions for cut- 'ting in both of said directions, combined with means for holding the pencil, and means for rotating and feeding the pencil' to the cutter and means for moving the cutter alternately in one and then in the other of said directions, substantially as described.

4. A machine for sharpening pencils, comprising a cutter adapted for movement rotatively in opposite directions and the cutter having provision for cutting in both of said directions combined with means for holding and means for feeding the pencil to the cutter and means for moving the cutter alternately in one and then in the other of said directions, substantially as described.

5. A machine for sharpening pencils, comprising a cutter adapted for movement rotatively in opposite directions and the cutter having provision for cutting in both of said directions combined with means for holding and means for feeding the pencil to the cutter and means for moving the cutter alternately in one and then in the other of said directions, and means for simultaneouslyrotating' the pencil, substantially as described.

A machine for sharpening pencils comprising a cutter a shaft and means to rotate the shaft a pivoted pencil-holding chuck and an elastic connection between the said shaft and chuck wherethrough motion is transmitted for rotating the chuck, said connection operating also for feeding the pencil to the cutter, substantially as described.

7. A machine for sharpening pencils, comprising a cutter a shaft, and means for rotating the shaft a pivoted pencil-holding chuck and a belt connection between the shaft and chuck composed of rubber or a similarly-elastic material wherethrough motion is transmitted for rotating the chuck said connection operating also for feeding the pencil to the cutter, substantially as described.

S. A machine for sharpening pencils, comprising, a shaft, a cutter supported. for movement with the shaft and means for rotating the shaft said means operating normally to rotate theshaft alternate] yi n one and then in the opposite direction combined with a pencilholding chuck, and aconnection between the shaft and chuck wherethrough motion is transmitted for rotating the chuck and means for feeding the pencil to the cutter, substantially as described.

9. A machine for sharpening pencils, comprising, a'shaft, a cutter supported for movement with the shaft and means for rotating the-shaft said means operating normally for rotating the shaft alternately in one and then IOO IIO

in the opposite direction and said cutter having provision for cutting the pencil in both of said directions t ombined with a pencil-holding chuck .andl means for rotating the chuck and feeding the pencil to the cutter, substanand further adapted for longitudinal tilting movement thereon whereby to carry the pencil toward and from the cutter, combined with the elastic belt connection whereth'rough niotion is transmitted from the shaft to the chuck and the pencil actuated toward the cutter, all substantially as described.

11. A machine for'sharpening pencils coniprising a rotatable cutter and a rotatable holder combined with an endWise-inovable motor-shaft and means wherethrougll movement of the shaft in one direction causes rotation of the cutterand holder in one direction and movement of the shaft in thc other.

direction operates to r`rotate thc cutter and holder in the reverse direction, substantially as described.

. 12. The combination with a tapering rotatable cutter, of a movably-supported pencilholder, and means for pressing the holder toward the center, said means being resisted only by the pencil until the latter is ground to the desired point.

l5. The combination with a rotary pencil holder and cutter, of an elastic connection between the cutter and holder for imparting motion from one to the other, said connection being such as to feed the pencil to the cutter While it is being turned.

Signed March 2S, A. D. 1898.

HOLMAN K. WHEELER. l Witnesses:

C. B. TU'r'rLn, A. M. TUTTLE.

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