US1257690A - Pencil-sharpener. - Google Patents

Description

w. R. FOX. I PENCIL SHABPENER. APPLICATION FILED OCT- 3h I913.

W. R. FOX. PENCIL SHARPENER. APPLICATION FILED 0CT.3I. I913.

Patented Feb. 26,1918

2 SHEETS-SHEET 2.

WIIIlIILAIVE R. FOX, OF GRAND RAPIDS, MICHIGAN.

Specification of LettersPatcnt:

Patented lfieh. 26; Thin:

Application filed October 31, 1913: Serial No. 798,502.

To. allwhomcz'tmag concern Be itknown that T, WILLIA1llRi.EOX a citizen. of the United States, residing at Grand Rapids, Michigan, have invented certainnew and useful Improvements inPencil-Sharpeners of. which the followingis a specification.

This invention relates. to improvements in pencil sharpeners- The objects of the invention are:

First, toprovide a=pencil sharpener which a will. givev a pencil a perfectly smoothand uniform pointanddn which the penc liwlll be so supported during sharpeningasto be freevfrom all torsional strain.

Second, toprovide a pencil. sharpener so constructed that it can be operated directly by anelectric motora,

Third, to provide a. device of thistype, in which the dust. is automatically throwniout of the. machine into. a suitable receptacle.

Further objects, and objects relating, to de: tails. and economies of construction a'ndLop,-. eration' will definitely appear from the detailed'description to follow.

I accomplish'the: objects of, 'my invention by the devices and meansdescribed in the following specification. The invention 18 further: described and pointed out in the claims.

A. structure constituting a preferred, embodiment of my invention :is. clearly illustrated in. the drawing forminga @part of this specification, in which: I Figure I is a perspective view of'the de- Fig. iris a perspectiveview with the motor. and. sharpening disks. removed from the same.

Fig. HT is, a. se'ctional'view on the line 3.3'.of Fig. TV, showing thepencil in position against the :faceof one of the disks.

Fig, IVis a sectional view on the, irregula-r line of Fig. 111, showingjthe pencil in sharpening position.

Fig V is a sectionalview on the line 51f-5 of.Fig. HT, showinginidetail. theanch'ormg means for. the pencillsupporting member.

Fig;.VIIis a detail view of. the parts shown in the left hand portion .of 'Fig'. TV, the pen cilandflthei casing being'rem'oved.

In; the drawing, the sectional views. are

takenlooking in aledirection. of the can arrows at the ends" ofthesectionlines and similar) numerals. refer; to S11 Tl1la1partS throughoutthe severahviews;

Considering the numbered, parts of the drawlng, the numeral 1 designates the base plate, to which is secured an electric motor 2 of any suitable type. This is provided with bindingposts 3, at which connection is made with the source of electric current. 4: is-the motor shaft. Secured to the base by; screws Sis the block 7 having a curved seat to'which a casing is fastenedby means of the screws 9. This casing comprises the disks, 5' which are secured toy and spaced apart by the circular strip 6 which is fastenedinithe seat of the block 7' heretofore mentioned. Qpenings are provided in the disks. 5' to. accommodate the shaft 4.4 of the motor.

Secured to the shaft 4: is the collar 12 to which aresecuredlthe disks 10. and 11 which may be; of emery, or of other material, or may beof metal covered with sheets offabrasive material. These disks are thinner at the periphery than at the center and are frustum shaped. They are so placed together that a V-shaped space is left between their peripheries. 13. and 13 are the beveled faces of the respective disks, which form this V- shaped space, and said faces are gently curved outwardly.

Block 14' is securedin the seat Lion the base. This block is providedwith an up right arm and a horizontally extending arm. The horizontally extending arm is fio'rlred and, is held in position in the seat'by,means ofthe bolt 17 The pin 18 acts as a stop to limit the movement of the block on the. base. To the uprightpart' of block 14: arm 19 is secured by means of screw20. This arm has the laterally extending. bracket 21 which supports the pencil in sharpening position and is provided with an upstanding lug QQ which prevents the insertion of the pencil beyondthe lug. This bracket is made narrower'than the distance between thedisks except. at the end nearing 22, in order to provide a space on each side through which the grinding dust willipass. This 1s clearly shown in Fig. VT; Arm 19 is provided with 1'0dS123, upon which. is slidably mounted the pencil supporting member'2 l; The numeral 25" designates the pencil to be sharpened, whichxis me in .the ii-shaped: notches "of the pencil supporting members and is" held in all Y disks and prevents any dust being carried past the opening.

From the description of the parts abov given the operation of the structure will be very readily understood. lhe pencil to be sharpened is placed on the supporting members 2 1 and 19 and the end thereof is inserted between the edges of the rapidly revolving disks. If it is desired to give the pencil a conical point, it is rotated by hand while itis being sharpened so as to enable the disks of abrasive material to act on all sides of the pencil. If, however,it is desired to give it a wedge point, often desired by draftsmen, it is not rotated but merely pushed in in. different positions. Lug 22 engages the end of the pencil and limits the amount to which it can be inserted. This prevents the pencil being worn away by inserting it beyond the V-shaped space between the disks. The location of the lug 22 'With'reference to the disks and hence the fineness of the point which is given to the pencil is re ulated by shifting the block 14:

- in the slot 15. The dust resulting from the sharpening of vthe pencil is carried down beside; the bracket and around. the bottom of the casing and thrown out through the opening 30 bymeans of centrifugal force. Guard arm 3 1 which is disposed in the V-shaped space between the disks prevents any of the dust being carried up past the opening 30.

It isnot necessary that the shaft be rotated by means of an electric motor although this is highly desirable as giving a very rapid rotation. Any other means either mechanical or manual may be used to rotate the shaft.

I have here shown a form of pencil supporting member in which the pencil is rotated by hand. I am aware that pencil supporting members are known in which the pencilis mechanically rotated by means of a driving connection with the operating shaft.

' Any of these forms of pencil holders may be used in connection with my device. However, the form of holderwhich I have here shown and described possesses particular advantages and I desire to claim it specifically. I am aware that the particular arrangement of parts I have here shown is susceptible of considerable variation. I therefore do not Wish to be restricted to this particular embodiment of my invention, but desire to claim the same broadly. However, the particular embodiment which I have shown is especially effective, and I desire to claim the same specifically as Well as broadly, as indicated by the appended claims.

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

1. In a device of the class described, the combination of a base, a shaft rotatably mounted thereon, means for rotating said shaft, a pair of sharpening disks secured to said shaft and rotating therewith, said disks being frustum shaped and having a V- shaped space between their peripheries, a pencil supporting member adjustably secured to said base and having an arm extending into the space between said disks and provided at its end with a stop lug, a block secured to the base and having an opening, a suitable dust receiving receptacle communicating with said opening, and a guard arm carried by the top of said block and disposed in the space between said disks, all coacting substantially as described for the purpose specified.

2. In a device of the class described, the combination of a base, a shaft rotatably mounted thereon, means for rotating said shaft, a )air of sharpening disks secured to said sha t and rotating therewith, said disks being frustum shaped and having a V- shaped space between their peripheries, means for supporting a pencil between said disks, a block secured to the base and having an opening, a suitable dust receiving receptacle communicating with said opening, and a guard arm secured to the top of said block and disposed in the space between said disks,

all coacting substantially as described for the purpose specified.

3. In a device of the class described, the combination of a base, a shaft rotatably mounted thereon, means for rotating said shaft, a pair of sharpening disks secured to said shaft and rotating therewith, said disks being frustum shaped and having a V-shaped space between their peripheries, means for supporting a pencil between said disks, means for supporting a dust receiving receptacle near the edges of said disks and a guard arm disposed in the space between said disks,

all coacting substantially as described for the purpose specified.

4. In a device of the class described, the combination of a base, a shaft rotatably mounted thereon, means for rotating said shaft, 2. sharpening disk secured to said shaft and rotating therewith, and pencil support ing means comprising a pencil support adjustably secured to the base and extending vertically therefrom, a pencil receiving notch in the end of said support, a spring secured to said pencil support and adapted to pass over the pencil to hold it resiliently in nssaeeo said notch, horizontal rods extending laterally from said support, a second pencil supporting member slidably carried by said rods and having a notch in alinement with said first named notch, an arm extending laterally from said first named pencil support, and a stop lug on said arm, all coacting subis tacilutially as described for the purpose speci- 1e 5. In a device of the class described, the combination of a base provided with a groove extending transversely thereof, a shaft rotatably mounted on said base, a pair of sharpening disks secured to said shaft and rotating therewith, a casing surrounding said sharpening disks, openings provided in the side wall of said casing on opposite sides thereof, a pencil support provided with a pencil supporting "arm extending laterally between said sharpening disks, said pencil support being provided with a slotted base seated in said groove, a bolt threaded into the base of said groove and passing through the slot in the base of said pencil support, the head of said bolt engaging the base of said pencil support whereby the latter is held in adjusted position, a pin projecting into the groove of said base to limit the inward movement of the pencil support, a block seated in the groove in said base opposite the pencil support and provided with a guard arm projecting through the openin in the casing between the sharpening dis (S, said block being provided with a funnel shaped mouth in line with the opening in the casing, said mouth being provided with a head to which a suitable dust receiving receptacle may be attached, all coacting substantially as described for the purpose specified.

6. In a device of the class described, the

combination of a base, a shaft rotatably mounted thereon, means for rotating said shaft, a pair of grinding disks with beveled faces disposed toward each other, a pencil support extending between said disks, a casing surrounding said grinding disks and provided with an opening communicating with a suitable dust receptacle, and a guard arm extending between said disks and adapted to deflect the dust through said opening into said dust receptacle.

7. In a pencil sharpener, the combination with a support, of a pair of grinding disks with beveled faces disposed toward each other, means for rotating said disks in the same directioma pencil supporting member extending between said disks, a guard arm extending between said disks, and a casing surrounding said disks and provided with an opening therein adapted to communicate with a suitable dust receiving receptacle, said guard arm serving to deflect the dust from between said disks through said opening in the casing, all coacting substantially as described and for the purpose specified.

In witness whereof, I have hereunto set my hand and seal in the presence of two wittopics of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. '3.

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