US2664071A - Pencil sharpener - Google Patents

Pencil sharpener Download PDF

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Publication number
US2664071A
US2664071A US183369A US18336950A US2664071A US 2664071 A US2664071 A US 2664071A US 183369 A US183369 A US 183369A US 18336950 A US18336950 A US 18336950A US 2664071 A US2664071 A US 2664071A
Authority
US
United States
Prior art keywords
pencil
central axis
gripping
machine
gears
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US183369A
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English (en)
Inventor
Guhl Alfred
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2664071A publication Critical patent/US2664071A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L23/00—Sharpeners for pencils or leads
    • B43L23/02—Sharpeners for pencils or leads with gearing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17213—Transversely oscillating jaws

Definitions

  • My present invention relates to a pencil sharpener.
  • One of the objects of my present invention is to provide a pencil sharpener having a means for simultaneously gripping and feeding the pencil into the machine.
  • Another object of my present invention is to provide an electric motor to drive the pencil sharpener having a slip clutch connected thereto so as to prevent the breakage of any parts of the apparatus.
  • Fig. 1 is a partial cross section of a view of a pencil sharpening machine according to the invention taken from the side on which the pencil enters the machine and as viewed in the direction of arrow C of Fig. 2;
  • Fig. 2 is a cross section taken on the line A--B of Fig. 1, and looking in the direction of the arrows;
  • Fig. 3 is a cross section taken on the line D-E of Fig. 1, and looking in the direction of the arrows;
  • Fig. 4. is a view of the gripping elements as viewed in the direction of arrow F of Fig. 2;
  • Fig. 7 is a sectional view of a control lever for stopping the operation of the apparatus
  • Fig. 8 is a view of the stopping apparatus of Fig. 7, as seen in the direction of arrow G of Fig. '7
  • Fig. 9 is a sectional view taken along the line I-I-J of Fig. 7, and looking in the direction of the arrows;
  • Fig. 10 is a part of a machine stopping apparatus as viewed in the direction of arrow K in Fig. 11;
  • Fig. 11 is a plan view of the machine stopping apparatus shown in Fig. 10;
  • Fig. 12 is a partial sectional view of the motor and a slip clutch connected thereto;
  • Fig. 13 is a plan view of a two bladed knife
  • Fig. 1 1 is an elevational view of the knife shown in Fig. 13;
  • Fig. 15 is an elevational view of another type of knife
  • Fig. 17 is a sectional view of an elastic sealing member to protect the gearing of the machine from shavings
  • Fig. 18 is a sectional view of another form of sealin means taken along the line L--M of Fig. 19;
  • Fig. 19 is a sectional view taken along the line NO of Fig. 18, and looking in the direction of the arrows.
  • the pencil sharpening machine of my present invention comprises a frame 3 which has formed integrally therewith a circular rim 2 having a disc 3 fastened thereto, the disc 3 having a central conical opening 4 which is aligned with a corresponding opening 5 located in the frame I opposite to said opening 4.
  • the opening 5 has a conical extension 6 integral therewith formed so as to correspond to a point of a pencil to be sharpened, whereby the pencil is properly supported within the machine.
  • a disc shaped boss Centrally arranged with respect to opening 4 and on the inner surface of the disc 3 is located a disc shaped boss which is provided on its surface, which is parallel to the inner surface of discs, with spiral gear teeth out therein, as shown in Fig. 5.
  • a guiding plate 8 is freely and rotatably mounted about the shoulder of spiral gear l.
  • the said plate 8 has located therethrough guide slots EB which have an arcuate shape and are arranged at a distance from the center of plate 8, as shown in Fig. 1.
  • a gear wheel In spaced relation to the vertical inner surface of plate 8 is located a gear wheel in which is rotatably mounted and is aligned with plate 8.
  • the gear wheel I9 is provided with gear teeth H which mesh with a pinion l2 which is connected by means of shaft l3 to a worm drive l4 which is operatively connected to drive shaft 55, which drives the sharpening tool It.
  • the gearing by which gear wheel H3 is connected to drive shaft l5 provides a reduction in the speed of gear wheel H] as compared to the rotative speed of shaft 15 whereby the elements which grip the pencil, as will be explained below, rotate the pencil much slower than the shaft I5 is rotated.
  • the gear wheel [0 has a flat flange l1-having a surface located adjacent to but spaced from plate 3 and parallel thereto.
  • a ring-shaped disc 29 Rotatably and coaxially mounted with respect to plate 8 and gear wheel ii] is a ring-shaped disc 29.
  • This disc 25 for reasons .of clarity .is not shown in Fig. 2 but may be seen in Figs. land 3. .As may be seen from Fig. 3, the disc .29 is retatably mounted about hollow element '30 formed integrally with the housing l.
  • the ring-shaped disc as carries at an end thereof an operating lever B! by means of which the disc may be rotated about element 39 through a certain angle.
  • carries on a pivot pin 32 a pawl 33 which is provided at its upper free end 3!
  • the motor 58 now drives shaft 1 5 and the cutting tool It therewith by means of a slip clutch 59, and by means of the worm drive M, the motor drives shaft 13 and pinion i2 connected thereto so as to rotate gear wheel it which carries therewith the pins 18 of clamps i9, 28, 2
  • the pencil point locates itself in the holding element 8, as shown in Fig. 2, and is sharpened by means of a rotating cutting tool, such as, for example, the two-bladed knife Hi.
  • the slip clutch located becannon tween electric motor and drive shaft l5, as shown in Fig. 12, will slip when a certain magnitude of turnin moment is obtained .so that the transmission of power between the drive shaft of motor 58 and the drive shaft i is broken. in this way the windings of the motor cannot be damaged by a current overload, accidents to the cutting 5001 and gear 3 produced by overloads are avoided.
  • the pr -e of the slip clutch can be regulated way such as, for example, by adjusting the r pressure of spring 8
  • an offset pencil point such as that illustrated in Fig.
  • smaller sized pencils can also be sharpened in the same manner and with the same apparatus. It is possible to sharpen very small pencils .in the machine, whereby the usability of the machine is proportionally increased.
  • the sharpening of the smallest pencils with faultless points can be obtained. with a machine constructed according to the invention, as distinguished from conventionally consructed sharpening machines.
  • the sharpening of the shortest practically usable pencils can be accomplished in the machine of my present invention so that it is not necessary to give up the use of mechanical devices in order to make a point on a short pencil.
  • a stationary spiral gear formed with a central aperture passing therethrough and located along a central axis, the gear teeth of said spiral g ar being located in a first plane normal to said central axis; support means located in a second plane parallel to said first plane and bein mounted for rotation about said central axis; at least two grippin gears symmetrically located about said central axis and meshing with said spiral gear, said gripping gears being mounted on said support means for movement toward and away from said central axis and for rotation about axes normal to said central axis and parallel to said first plane; resilient mean; operativel'y connected tosaid gripping gears for urging the same towards said central axis; dr ve means operatively connected to said support ans for rotating the same about central a; s so as to thereby cause said gripping gears meshing with said spiral gear torotate and feed a pencil gripped therebetween along said central axis, said drive means comprising a motor and an

Landscapes

  • Drawing Aids And Blackboards (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
US183369A 1949-09-16 1950-09-06 Pencil sharpener Expired - Lifetime US2664071A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL712982X 1949-09-16

Publications (1)

Publication Number Publication Date
US2664071A true US2664071A (en) 1953-12-29

Family

ID=19814866

Family Applications (1)

Application Number Title Priority Date Filing Date
US183369A Expired - Lifetime US2664071A (en) 1949-09-16 1950-09-06 Pencil sharpener

Country Status (5)

Country Link
US (1) US2664071A (fr)
DE (1) DE812292C (fr)
FR (1) FR1088558A (fr)
GB (1) GB712982A (fr)
NL (1) NL148739C (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3229670A (en) * 1964-01-07 1966-01-18 Georges A Mourra Lead pointer
US3326190A (en) * 1966-03-07 1967-06-20 Tombow Pencil Company Ltd Pencil draw-in device for pencil sharpener
US20100078095A1 (en) * 2008-10-01 2010-04-01 Anwar Farooq More silent and robust electric pencil sharpener

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1009533B (de) * 1956-03-05 1957-05-29 Guido A Graf Von Gatterburg Di Durch einen Elektromotor angetriebenes Bleiminenhalterspitzgeraet
US3515187A (en) * 1967-10-10 1970-06-02 Robert Scofield Condon Pencil lead pointer

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US826837A (en) * 1905-07-06 1906-07-24 Dick Co Ab Pencil-pointer.
US1170093A (en) * 1913-12-22 1916-02-01 Traut & Hine Mfg Company Pencil-sharpening machine.
US1285528A (en) * 1913-12-15 1918-11-19 Boston Pencil Pointer Company Pencil-pointer.
US1722771A (en) * 1926-08-20 1929-07-30 Spengler Loomis Mfg Co Pencil holder for sharpeners
US1753275A (en) * 1926-10-11 1930-04-08 Olof A Narverud Attachment for pencil sharpeners
DE600959C (de) * 1931-08-16 1934-08-09 Georg Renner Bleistiftspitzmaschine
US2040214A (en) * 1934-11-17 1936-05-12 Jr Angelo Ramires Electrical switch

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US826837A (en) * 1905-07-06 1906-07-24 Dick Co Ab Pencil-pointer.
US1285528A (en) * 1913-12-15 1918-11-19 Boston Pencil Pointer Company Pencil-pointer.
US1170093A (en) * 1913-12-22 1916-02-01 Traut & Hine Mfg Company Pencil-sharpening machine.
US1722771A (en) * 1926-08-20 1929-07-30 Spengler Loomis Mfg Co Pencil holder for sharpeners
US1753275A (en) * 1926-10-11 1930-04-08 Olof A Narverud Attachment for pencil sharpeners
DE600959C (de) * 1931-08-16 1934-08-09 Georg Renner Bleistiftspitzmaschine
US2040214A (en) * 1934-11-17 1936-05-12 Jr Angelo Ramires Electrical switch

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3229670A (en) * 1964-01-07 1966-01-18 Georges A Mourra Lead pointer
US3326190A (en) * 1966-03-07 1967-06-20 Tombow Pencil Company Ltd Pencil draw-in device for pencil sharpener
US20100078095A1 (en) * 2008-10-01 2010-04-01 Anwar Farooq More silent and robust electric pencil sharpener
US8016004B2 (en) * 2008-10-01 2011-09-13 Anwar Farooq More silent and robust electric pencil sharpener

Also Published As

Publication number Publication date
DE812292C (de) 1951-08-27
GB712982A (en) 1954-08-04
FR1088558A (fr) 1955-03-08
NL148739C (fr)

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