US1040069A - Pencil-sharpening machine. - Google Patents

Description

E. P. WEBSTER. PBNQIL SHABPBNING MACHINE.

APPLICATION FILED MAY 23,1511.

Patented Oct. l, 1912.

2 SHEETS-SHEET 1.

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A TTORNEY E. P. WEBSTER. PENCIL SHARPBNING MACHINE.

APPLIUATIQN FILED MAY 23,1911.

Patented Uct. l, 1912.

2 SHEETS-SHEET 2.

WITNESS/:"8:

UNTTED STATES PATENT onirica.

Enden r. WEBSTER, or nnrnorronnlconnaerrcm. f

vrgNon. estuarium,rre

specificati@ of Letters Param; Patented Oct 1, 1912. Original. application led April 14, 1911, SerialV lo. 621,075. Divided and this application led' lay 23, 1911. v

Serial No. 629,040. L

To all' who-m 'it may concern: Beit known that I, EDGAR P. WEBSTER, a citizen of the United States, residing in the city of Bridgeport, county of Fairfield, State .others skilled,

of Connecticut, have invented certain new and useful Improvements in Pencil-Sharpening Machines; and Ido declare the following to be a full, clear, and exact description of the' invent-ion, such as willenable in the art tov which it appertains to make Land use the same.

My invention relates to certain new and `useful improvements in pencil sharpening'- machines, and thas-for its object toprovide a machine of this description in 'which the pencil and cutter shall be revolved continuously in .the same direction; whereby at'theirpoints of contact during cutting said pencil and cutt,A r will be traveling in reverse directions, w ile at the-Sametime closer contact between theopencil and cutter is established during thecutti-ng of opposite portions of the pencil, 'so that a fiat po-intis provided.

.With these ends in view my invention conv sists in certain details. of construction and combination of parts such as will be hereinafter more fully described and `then particularly pointed'out in the claims which Aconclude this description.

In the accompanym is a sectional elevation of my improved niachine-Fig 2a detail sectional elevation t of the pencil clamping mechanism-F?. '3 :i i ig 4 said application in its, sooperelated solely to the cutting of'a round point vo-n the pencil Whereas the present application has referencesolely to the formation'of a flatl point,

and therefore I do not wishto be understood as clainringhereinl mecha'rnsmv forV forming r y.such round point.

1 is any su'1table,cas1ng to incl-ose t'he parts of my improvement, and 2 are horizontally disposed bottom plates secured to said' casing. 3y is the frame of the machine preferably of cast metal, and secured to said plates by means of screws 4. 5 is 'a horizont-ally drawing Figure -1 1 vnormally rest, said'a'nnulus having secured thereto and depending therefrom suitable =legs 6. The vupper structure, composed of 'thecasmg 1 and plates 2, is hingedto the manner, said cup being formed with a later- .1 ally extending flange 9 which fits within lsaid counter-bored portion so as to be flush i with the upper surface of said annulus.y

Journaled within the frame 3 in angular i disposition is a cutterroll 10 which carries lappinion 11 at'its upperext-remity, and located within a vertical opening 12 in the disposed annulus upon -which said plates 2 l 5g annulus 5 at 7,. and theinner u per surface f? of said annulusis counter-bore tom cup 8 assembled therein so as to b'e readily removable therefrom in any ordinary and, a botframe Bis a pencil bushing 13 which is capa- Y ble of vertical movements within said openy ing, within prescribed limits, as will be hereinafter more 'fully described. This bushing formed with a downwardly tapering openring 14 extending fro-m top to bottom, and said bushing is cut away at one, side so as to admit the-cutter roll 10` in juxtaposition within saidopening, so'that it will be clearly understood that a pencil introduced down through this opening'let would he withintheeld of operation of the cutter roll. 15 is a gage pin passed upwardly .and loosely through a thimble 16 held absolutely stationary between one of the" plates 2 and.

the frame 3, the upper end of said pin having secured theretoa head 17 in proximity' to the lower end of the bushing 13, while the lower extremity of said. pin is enlar ed as seen at 18 and is provided with an en argedl 'or counter-bored portion 19 which leads within? the interior of the upper portion rof' said pin. Around the upper portion of the vpin 15 andA confined between the th'mble I6 and head I7 is a coil spring 20 whosefunction is to normally, elevate said pin.` The lower edge of the thimble 16 has formed therein notohes21, 22, the latter of which is` deeper than `the former, andaround the pin 15 and immediately ybacked by the upper vedge ofI the enlarged part 18'is;a collar 23 that is secured to said pin as to vriot-ation and -is vprovidedy .with a tooth 24 extending upwardly therefrom and adapted to coperatie.

`with, the notches 21, 22, in the manner pres- `ently to be explained. Immediately beneath this collar 23 and engaging a threaded part ofthe enlarged portion 18 is a nut 25,

and extending loosely through the smaller opening in the pin 15 is a screw bolt 26 whose upper extremityv27 is threaded and driven within the pencil bushing 13, the lower end of this bolt being provided with a* against a pencil contained within said bushing, and this adjustment of the latter will be readily understood .when it is borne in mind that the screw bolt itself cannot advance because its head is in abutment against the inner wall of the counter-bored portion 19.

By turning or driving the nut on the enlarged portion 18 of the pin the latter will Y be drawn downwardly against the resiliency of the spring 20 thereby causing the head 1 to draw away from the bushing 13, and this adjustment is made in the assembling of the machine in order to fix the normal distance between said bushing and head, since, as

.will be hereinafter explained, the point of the pencil rests upon this head, and the greater the distance between the latter and said bushing the longer and sharper will the v'pencil point bey fashioned by the cutterroll.

This adjustment of thenormal position of the head 17 with respect to the bushing 13 may be effected while the tooth 24 is within either the shallow notch 21 or deep notch 22, and, if said adjustment is made while said tooth is within the deep notch 22 this will be effected for the shortest or bluntest pointon'the pencil whereas if said tooth is within the shallow notch 21 such adjustment will be for the longest or sharpest point. If this adjustment has been madewhile the tooth 24 is within the dee er notch 22, the operator, in the event that e desires a long point, Vmerely grasps the part 18 and turns the pin until the tooth 24 has ridden into the shallownotch 21, thereby forcing the pin downwardly againstlthe resiliency of the spring 20, and, as above described, withdrawing the head 17 at a greater distance from the bushing 13.V These adjustments, by means of the nut 25 andsscrew bolt 26. are

merely factory expediente and are utilized solely for `the purpose of properly fixing normal conditions of the iparts, since, in the sharpening of pencils, it is merely desired to obtain a short or blunt point and a long or sharp point, and these results are obtained by merely turning the pin bodily so as to cause the tooth 24 to coperate with the notches 22 and 21.

screw 30 driven within the end of the latter, and after this bushing has once been suiiciently depressedv so as to be in the proper position for cooperating with the cutter roll ,10 this position of said bushing is maintained by means of a. stop 31 driven into the frame 3immediately above the upper edge of the bushing. But, as a matter of fact, I prefer to adjust the gage pin with respect to the bushing when the tooth 24. is within the shallow notch 21 and this adjustment is of course made for the longest and sharpest point, and when the pin is turned tothrow the tooth into the deeper notchv 22 to elevate the pin, this will canse the inner wall of the counter-bore 19 to draw away from the head c 28 so that vtherewill be a space 32 between said wall and head, whereby when the tooth is shifted into the shallow notch the pin will be depressed without affecting the bolt 26 or the. bushing 13.

The cutter and the pencil are rotated simultaneously and continuously so as to `travel at their points of Contact in reverse directions by means of the following instrumentalities which I will now describe.

Journaled within the frame 3 is a crank shaft 33 to whose outer extremity beyond the casing is fixed a crank 34,L and carried by this shaft is a bevel gear 35 which meshes with a comparatively large annular shaped bevel gear 36. 37 is an annulus resting iupon the gear 36, and 38 is a hollow hu :upon said annulus, and said gearfannulus,

and hub are firmly secured` together by imeans of screws 39, so that it will be clear that these three parts will all rotate in harmony. The inner periphery ofthe annulus .37 has spur teeth 40 which mesh with the pinion 11, and the hub 38 at its upper end is journaled varound a reduced portion 41 of the frame, which portion is in the form 'of -a vertically disposed socket and is'exteriorly threaded at its upper end. Owing t0 the fact that the hub is journaled around a reduced portion of this part of the frame,

` said hub will be supported by the frame itself and4 will maintain the gear 36 and annulus 37 in proper horizontal position so that they will properly mesh with the gear 35 and pinion 11, and this hub is capable of free revolution around this reduced portion. 42 is a leather or other washer encircling the reducedportion of the frame and resting upon the top of the hub 38 and confined by means of a nut 43 driven on the threaded portion of said frame against said washer suiiiciently tight to keep the hub from jumping upwardly during operation but not so tight as to interfere with the free rotation of saidhub. The upwardly projecting portion zof this hub is exteriorly threaded, and an interiorly threaded cap 44 is secured theretoso. as to revolve therewith. Contained wlthin the socket portion of the reduced upwardly extending portion of the frame'41 is a loose sleeve 45 capable of free vertical and rotary movements. within said# socket and'V having its lower extremity extending inwardly and beveled as shown at 46, and 47 is a thimble whose lower portion is enlarged and lits loosely within the sleeve- 45 so as to be capable of independent vertical and rotary movements therein, the upper end of which 'i slot 58 in-r the. side of said bushing, and-1B thimble is provided with a laterally extend.- ing finger lug 48 and a peripheral beveled tooth 49 which latter is adapted to engage 'with a beveled notch, 50 formedl within theupper edge of a ring 51 that loosely encircles i the upper portion of the thimble 47 and is rigidly secured to the inner upper wall of the sleeve 45, said ringl being likewise provided with a linger lug 52. A coil spring 53 encircles the reduced portion of the thin-1-- cured within .the inner wall of the lowery part of the enlarged portion of the thimble 47 is a ring 54, and this portion ofthe thimble is cut away at intervals to form a suitable number of recesses 55, and loosely swung on this ring and contained freely within these recesses are the pencil clamping jaws 56 that are preferably roughened on their exterior surfaces andof a general ovoidal shape, these jaws being loosely-fitted around the ring near their lupper portions.`

a is a vertical slot in the outer surface of sleeve 45, and within this slot extends the inner upper edge of cap 44, so that it will be evident that said cap and sleeve will revolve in harmony. When the thimble 47 is elevated in the manner above described these jaws will swing to a vertical plane as shown at Fig. 2, but when the operator releases the linger lugs 48, 52, the spring 53 will act `to force the thimble downwardly thereby forcing the lower ends of these jaws against the beveled surfaces 46, and this will throw the jaws inwardly toward each other.

In operating my improvement the sleeve 46. is elevated andthe lugs 48, 5.2-, are. then compressed 1n the manner above describedl pencil'- downwardly by gravity and thus keepy the lower end` of said, pencil always in proper'relation with respect tothe cutter.

It is necessary toprovide some mea-ns for preventing the rotation of' the pencil bushlng device for this purpose such as a screw 57 driven through the frame and having a reduced tip which extends-within an elongated furthermore provide any ordinary handle 59 n at the endA ofl the crank arm 34 in order'to actuate the latter. Referring tol Fig. 1 ofthe drawing, 60a is -an opening eccentrically located lengthwise in the crank shaft 33 throughout the length of the latter, and`61'is a plunger within saidf- 4,opening and capable of free movements therein and having extending from its forward end a stud 62 immediately oppositeQ a suitably shaped recess 63 in the pencil bush `ing 13. 64 is a rod connected to said plun. ger, and to the outer endy of said rod beyondf the cra-nk 34 is secured any suitable knob 65.

' 66 is a plug which is driven within the outer .end of" the opening 6.0 and through4 which the rod 64 loosely extends, and 67 is a., coil` spring surrounding said rod and confined between the plunger 61 and plug 66, said' spring acting to normally project the stud 62 within the recess 63.

In cutting `a round? point on4 a pencikin vthe manner described in my said application i the rod 64 is retracted and kept in this pos-i:- tion by the abutment of a pin-68 extending ffroln the hub of the knob 65 against' thev j. outer end of the shaft 33 as shown at Fig; ,1, but by turning this knob so that said ypin will come opposite to a notch 69l in the edge of said shaft-the spring 67 will thenforce the plunger 61 inwardly and thereby cause the stud 62 to enter the recess 63';

INow when this' stud 62 is within the recess l63, the revolution of the crank 34 will fonce said stud downwardly against the lower wall of said recess and will thereby momenf .tarily depress the bushing 13 as well as'v the gage power ul than the spring 20. The shape of Qthe recess 63 is such that there is more or less lost motion while the stud 62isoperat- 5 ing wit-hin said recess, and therefore the de pin 15, the spring 29 being more pression of the bushing 13 and gage 'pin 15 ,by the operation of the crank 34 is such that it would occur only throughout about one-sixth of a complete'revolution of said crank, although this proportion might be altered to a greater or lesser degree as the occasion might deman The proportion between the gears 35 an 36 is such that va '70 and therefore I utilize an ordinary complete revolution of the former will effect onlv a half revolutionl of the latter, and

theiefore this depression of .the bushing 13 and pin 1-5 will occur twice during a complete revolution of the gear 36, and since the penl cil is revolved in harmony with the gear 36 -aI fiat point may be obtainl and this is something that has never` before been done. Of course it -wi ll be 'clearly understood that the closer the cutting relation between the pencil and the cutter the deeper will be thecut eected, and therefore the same result can be obtained by adjusting the cutter itself at predetermined times nearer to the pencil, and accordingly I have illustratedfat VFig-4 a modification of my improvement in this respect which l will now describe. 70 is an E -shaped lever whose horizontal member is supported on one of the bottom plates 2 immedlately below the frame 3 while the upright member terminates in a beveled lug 71 adapted to be engaged by a beveled lug 72 carried by the gear 35 near its periphery; This E -shaped` lever is capable of a free shifting movement toward and away from .the casing 1, and when the lug 72 engages 4the lug 71 it will force said lever toward said casing, a coil spring 73 having its ext-remities secured respectively to said lever and to a pin 74 rising from the plate 2 serving to normally retract said lever. rlhe lower journal of the cutter roll 10 is carried by the horizontal member of this lever 70 and extends through an lenlarged opening 75 inthe frame 3,so that it willv be clear that asfthe crank 34 is revolved the cut-ter roll 10 will be thrown inwardly toward the pencil bushing whenever the lug 72 engages the lug 71, and thisJgenga-gement of these lugs and the consequent inward throw of the cutter rdll occurs throughout only about onesiXth of the revolution'of thecrank 34, the

` pencil being rotated only half a complete revolution while the gear 35 is completing a whole revolution, and therefore the same results as \to the formation of a fiat point will be obtained as in the` instance above describe-d with respect to Fi 1. I therefore do not wish to belimite to either the adjustment of the pencil bushing toward the cutter or the adjustment of the latter toward the pencil bushing, since thesame results, so' far as the formation of a flat point is concerned, are obtained in both instances, my invention residing in the broad idea -of the formation of .a fiat point by the simultaneous and continuous rotation of the pencil clamping devices -and cutter and the bringing of said devices and cutter into closer relation at predetermined times.

terslatent is 1. ln a pencil sharpening machine, the combination of a rotary cutter, a pencil receiving bushing adjacent said cutter, means for moving one ofthese elements' toward the other at certain stated periods,.and a pencil clamp freely movable vertically whereby when elevated a pencil clamped therein will rest by gravity within said bushing.

2. ln a pencil sharpening machine, the combination of a rotary cutter, a pencil receiving bushing adjacent said cutter, means for moving one of these elements toward the pencil clamp freely movable vertically whereby when elevated a pencil clamped therein will rest by gravity within said bushing.'

3. ln a pencil sharpening machine, the

receiving bushing adjacent said cutter, means for moving one of these elements toward the other at certain stated periods, a

cally whereby when elevated a pencil clamped therein will rest by gravity within said bushing, and means for causmg said pencil and cutter t o simultaneously and continuously travel in reverse directions at their point of contact.

ln testimony whereof I affix my signature in presence of two witnesses.

EDGAR P. WEBSTER.

Witnesses:

F. W. SMITH, Jr.,

M. T. LoNcnEN.

Having thus described my invention what l claim as new and desire to secure by Letrotary pencil clamp freely movable verti-` seI combination of a rotary cutter, a pencil 80 other at certain stated periods, and a rotary

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