US2691364A - Mechanical pencil - Google Patents

Mechanical pencil Download PDF

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Publication number
US2691364A
US2691364A US689034A US68903446A US2691364A US 2691364 A US2691364 A US 2691364A US 689034 A US689034 A US 689034A US 68903446 A US68903446 A US 68903446A US 2691364 A US2691364 A US 2691364A
Authority
US
United States
Prior art keywords
lead
gripping member
housing
pencil
magazine
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
US689034A
Other languages
English (en)
Inventor
Valsecchi Arduino Carlos Pedro
Capurro Juan Jorge
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
Priority to BE471514D priority Critical patent/BE471514A/xx
Application filed by Individual filed Critical Individual
Priority to US689034A priority patent/US2691364A/en
Priority to GB25745/46A priority patent/GB615295A/en
Priority to FR934716D priority patent/FR934716A/fr
Priority to CH273716D priority patent/CH273716A/fr
Application granted granted Critical
Publication of US2691364A publication Critical patent/US2691364A/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
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K21/00—Propelling pencils
    • B43K21/02—Writing-core feeding mechanisms
    • B43K21/16—Writing-core feeding mechanisms with stepwise feed of writing-cores
    • B43K21/20—Writing-core feeding mechanisms with stepwise feed of writing-cores with writing-cores automatically replaced from magazines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K21/00—Propelling pencils
    • B43K21/02—Writing-core feeding mechanisms
    • B43K21/16—Writing-core feeding mechanisms with stepwise feed of writing-cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K24/00—Mechanisms for selecting, projecting, retracting or locking writing units
    • B43K24/10—Mechanisms for selecting, projecting, retracting or locking writing units for selecting, projecting and locking several writing units
    • B43K24/16—Mechanisms for selecting, projecting, retracting or locking writing units for selecting, projecting and locking several writing units operated by push-buttons

Definitions

  • MECHANICAL PENCIL 112 sheds-sheet 2 Filed Aug. 7, 1946 Patented Oct. 12, 1954
  • MECHANICAL PENCIL 112 sheds-sheet 2 Filed Aug. 7, 1946 Patented Oct. 12, 1954
  • MECHANICAL PENCIL 112 sheds-sheet 2 Filed Aug. 7, 1946 Patented Oct. 12, 1954
  • Another object of the invention resides in the provision of a mechanical pencil having a rotatable multicelled magazine with independent cells for each lead and means for receiving a lead from any cell of said magazine and guiding same to the lead gripping member and back into its magazine cell.
  • a further object resides in the means for 1ocating and retaining the rotatable magazine in position with one of its cells in communication with the lead gripping member.
  • the lead can be advanced step by step up to the last millimeter of its length.
  • This characteristic constitutes an improvement which distinguishes the pencil according to the present invention from all the button operated pencils having a lead lfeeding mechanism to advance the lead step by step hitherto known and used, all of which have two lead gripping members.
  • the lead In these pencils the lead cannot be positively advanced if its length is less than the distance between the two lead gripping members, which is usually about half an inch, and this drawback which is very important in a pencil for several colors with independent cells for each lead, is avoided by the present invention.
  • a lead can be released from the lead gripping member to return it to the magazine without any other special device, with the maximum simplicity of construction and operation.
  • a lead can be returned to its magazine cell and another lead can be selected and advanced to writing position only by reversing the pencil, pressing a push button and rotating the magazine, all of which are accomplished in a very short time.
  • the rotatable magazine is held in a position Valsecchi and Juan Jorge Capurro, wholesome Aires, Argentina Application August 7, 194s, sera1No.6s9,os4
  • a locking device comprising a series of openings, one for each cell, in the wall of said magazine, an opening in the housing capable of registering with any of the said first-mentioned openings according to the angular position of the magazine, a movable locking member lodged in the opening in the housing and insertible in any of the first-mentioned openings for holding said magazine in selected angular position, and a clip attached to the housing and overlying the opening in the housing to hold said member in one of said mst-mentioned openings.
  • Figure l is a longitudinal sectional view of the multi-color mechanical pencil showing the lead feeding mechanism in its starting position
  • Figure 2 is a partial longitudinal sectional view of the pencil showing the lead feeding mechanism just before the lead gripping member is uncou pled from the push button,
  • FIG. 3 shows the same mechanism, just after the lead gripping member is uncoupled from the push button
  • Figure 4 shows the same mechanism during the return movement of the push-button
  • Figure 5 is a cross-sectional view of the pencil taken on line 5-5 of Figure 1 through the lead magazine
  • Figure 6 is a cross-sectional view of the pencil, taken on line 6-6 of Figure 1,
  • Figure 7 is an elevational view of the lead gripping member, y
  • Figure 8 is a plan-view of the lead gripping member
  • Figure 9 is a longitudinal sectional view of a single color mechanical pencil showing the lead feeding mechanism in its starting position.
  • the pencil object of this invention comprises:
  • , Figure 1 with a point 2 longitudinally pierced by an eccentric conduit 3 at whose outlet a sleeve 4 is provided, having a bore 5 in which the lead gripping member 5 is wedged.
  • Rotatable tube 'I contains the lead feeding mechanism in the upper part thereof, the periphery of the lower part being provided with slots 9, which constitute the lead magazine.
  • the tubes I and 1 constitute the housing.
  • a ball IQ is lodged in an orifice H of tube i registering with the clip I2, and is insertible in any of the openings I3 of the tube TI.
  • a lead-guide tube I5 is slidably mounted within the eccentric conduit 3 of the tube I, which :by turning tube 1, may be brought into alignment with any one of the slots 9 of the lead :magazine
  • the lead gripping member 6 is provided with a plurality of jaws elastica-lly urged in a manner such that if no external force acts upon the lead gripping member it is open allowing free 'passage to the lead I6.
  • a disc vI1 forms the base of the lead magazine and .serves as a union between the lead guide tube I5 and a rod I8, with which it forms an integral part.
  • the disc I1 is a closure member adapted to close all the slots 9 except the one from which a lead is to be used.
  • the rod I8 is slidably mounted inside the bore I9 of tube ⁇ 1 and is provided with a flange 29.
  • a spring 21 is compressed between flange 20 of rod I8 and the top of the lead magazine.
  • a rod ⁇ 22 is slidably mounted in the tube 1 and is provided with a flange portion 23, and another ange portion 24, this latter one being bounded by two conical surfaces.
  • a bushing 25 is threaded into the tube 1 and is provided with .an inner flange 26.
  • a spring 21 is compressed between the inner ange 25 of bushing 25, and the flange 23 of rod 22.
  • a bushing 28 is threaded in the tube 1, abutting against the bushing 25, and is provided with an inner flange 29 bounded by two conical surfaces.
  • a washer 38 is housed inside bushing 25, and retained by the inner flange 29 of bushing 28.
  • a spring SI is compressed between washer 30 and the inner iiange 26 of bushing 25.
  • a cap 32 is threaded on the bushing 28 and forms therefore an integral part of the tube 1, and is provided with an opening 33.
  • the tube I together with the tube 1, the cap 32. the bushings 25 and 28, and the point 4 constitute the housing of the pencil.
  • a push button 34 is slidably mounted in the bushing 28 as well as in the cap 32, and is telescopically related with the rod 22.
  • a ball 35 is movably lodged in a bore in the wall of the push button 34.
  • the single color pencil of Figure 9 comprises:
  • a casing I1 constituted by two parts joined by the bushing 28.
  • a bushing 251 is threaded in the casing I1, abutting against the bushing 28.
  • a bushing 38 is threaded in the casing I1 and is provided with a flange 39 to retain the springs 21 and 3
  • a tube 221 is slidably mounted in the casing I1 and is provided with a flange 231 and another flange 241 bounded by two conical surfaces.
  • a tube 36, forming the lead magazine, is slidably mounted in the casing I1 and is telescopically related with the rod 221. The ball 35 is lodged in a bore in the wall of the tube 36.
  • a push button 341 is provided at the top of the tube 36.
  • the push button 34 is pressed compressing spring 3
  • the rod 22 advances together with the lead guide tube I5, compressing the spring 2I.
  • the lead gripping member 6 advances with the lead I6 initially held by its jaws, till the ball 35, sliding over the upper conical surface of the flange 24 lodges itself beneath the inner iiange 29 of the bushing 28 ( Figure 2 and Figure 3). This abruptly uncouples the rod 22 from the button 34.
  • the lead gripping member When the lead gripping member is abruptly stopped, the lead continues advancing somewhat, sliding in the open lead gripping member due to its inertia of motion, in the same way as an article, resting freely on a moving support continues its motion when the support is abruptly stopped.
  • button 34 When button 34 is lreleased it moves back with the ball 35, by the action of the spring 3l ( Figure 4), and said ball 35 sliding over the lower cone of the inner flange 29 of bushing 22 will lift the its flange 24 and compress- 21. Once past the inner flange will slide over the lower cone of the ange 24 of rod 22, lodging itself on the flange 29, and the rod 22 will then return to its initial position of Figure l, by the action of the spring 21.
  • the button 34 is fully pressed, farther than the position shown in Figure 3, with the pencil pointing upwards, in order to cause the upper wall of the cavity in the button 34 to act directly upon the top of the rod 22, thus -advancing the lead gripping member 6 and freeing the lead from the jaws, so that it can fall by gravity into its magazine cell.
  • the button 34 is then released.
  • the magazine is turned with the pencil pointed upwards, till the desired mark I4 of rotatable tube 1 coincides with the clip I2. Then by pointing the pencil downwards 4, and by pushing the button 34 said lead is fixed by the lead gripping member 6.
  • the pencil is pointed upwards and the push button is pressed fully down, as when changing color, and the new lead is inserted through the lead gripping member, the jaws of which will be open.
  • a mechanical pencil provided with a lead feeding mechanism utilizing the inertia of the lead stick to advance it step by step, comprising a housing, a lead gripping member mounted'in said housing for longitudinal movement Y outwardly and inwardly thereof and having jaws resiliently urged in an outward direction, means for longitudinally moving the lead gripping member and for varying the velocity of the lead gripping member during movement lengthwise thereof to cause the lead to advance, due to its own inertia, upon said lead gripping member, said means comprising resilient means urging the lead gripping member inwardly of the housing to wedge it inthe opening at the point of the pencil to grip the lead to prevent its recession during writing, an inner flange on the housing for limiting the stroke of the lead gripping member inwardly thereof when it grips not a lead, a push button slidably mounted in the housing, resilient means urging this push button to a position projecting outwardly of the housing, a tube connected to the push button and forming a magazine for containing a plurality of
  • a mechanical pencil comprising a housing constituted by upper and lower parts rotatably related, fthe upper part of this housing being partially contained in the lower part thereof and provided with a plurality of longitudinal cells for leads constituting the magazine, means mounted at the outlet end of the lead magazine cells and rotatable relative tothe upper part of the housing for selec-tively closing all the cells except the one from which a lead is selected to be used, receiving the lead from that cell and guiding said lead to the point of the pencil and back to its magazine cell, said means comprising a closure member and a lead guide tube eccentrically mounted at y according to the angular position of 6..
  • a releasable retaining device for positioning said closure means relative to that magazine cell, said device comprising means on the housing to indicate that cell, vthe upper part of the housing having a plurality of openings, one for each magazine cell, the ywall of the lower lpart of the housing having an opening registering with any of said iirst mentioned openings the magazine relative to the closure means, a sphere movably lodged in the opening on the lower part of the housing and a clip attached to the lower part of the housing and overlying said sphere to hold it in one of the openings on the upper part ofthe housing, and ⁇ a lead feeding mechanism utilizing the inertia o-f ⁇ the lead stick to advance it step by step comprising a lead gripping member attached to the outlet end of the lead guide tube
  • a mechanical pencil comprising a housing constituted by upper and lower parts rotatably related, the upper part of this housing lbeing provided with a plurality of longitudinal cells for leads constituting the magazine, means mounted at the outlet end of -the magazine cells and rotatable relative to fthe upper part of the housing for selectively closing all the cells except the one from which a lead is selected -to be used, receiving the lead from that cell and guiding said lead to the point of the pencil and back to its magazine cell, means to prevent the rotation between said lclosure means and the lower part of the housing, a releasable retaining device for positioning said closure means relative to that cell,
  • a Ylead gripping member attached to the outlet fend of said closure means for longitudinal movement outwardly and inwardly of the housing and having jaws resiliently -urged in 4an outward direction, meansior longitudinally moving the lead 4grinning member and for varying the velocity of said lead gripping member during movement lengthwise thereof toca-use the lead to advance, due to its own inertia, upon the lead gripping member, said last mentioned means compris-ing a r-od slidably mounted in the upper part of Athe yhousing and attached to the inlet end of said closure means, resilient means urging said rod inwardly of the housing to wedge the lead gripping member inthe opening at the point ofthe pencil to grip the lead to prevent its recession duringwriting, -a push button slida'bly mounted in the upper part of the housing, resilient means
  • a mechanical pencil provided with a lead feeding mechanism utilizing the inertia of the lead stick to advance it step by step comprising a housing, a lead gripping member mounted in said housing for longitudinal movement outwardly and inwardly thereof and having jaws elasticallyurged in an outward direction, means for longitudinally moving the lead gripping memb'er Iand ,for varying the velocity of said lea'd gripping member during movement lengthwise thereof to' cause the lead to advance, due to its own inertia, upon said lead gripping member, said means comprising resilient means urging said lead gripping member inwardly of the housing to wedge it in the opening at the point of the housing tov grip the lead to prevent its recession during writing, a push button slidably mountedin the housing, resilient means yurging said button to a position projecting outwardly of the housing, a rod telescopically related to said button and abutting against said lead vgripping member, resilient means urging said rod against the lead gripping member, said butto-n

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  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
US689034A 1946-08-07 1946-08-07 Mechanical pencil Expired - Lifetime US2691364A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE471514D BE471514A (enrdf_load_stackoverflow) 1946-08-07
US689034A US2691364A (en) 1946-08-07 1946-08-07 Mechanical pencil
GB25745/46A GB615295A (en) 1946-08-07 1946-08-28 Mechanical pencil
FR934716D FR934716A (fr) 1946-08-07 1946-10-10 Porte-mine
CH273716D CH273716A (fr) 1946-08-07 1947-02-24 Porte-mine.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US689034A US2691364A (en) 1946-08-07 1946-08-07 Mechanical pencil

Publications (1)

Publication Number Publication Date
US2691364A true US2691364A (en) 1954-10-12

Family

ID=10232588

Family Applications (1)

Application Number Title Priority Date Filing Date
US689034A Expired - Lifetime US2691364A (en) 1946-08-07 1946-08-07 Mechanical pencil

Country Status (5)

Country Link
US (1) US2691364A (enrdf_load_stackoverflow)
BE (1) BE471514A (enrdf_load_stackoverflow)
CH (1) CH273716A (enrdf_load_stackoverflow)
FR (1) FR934716A (enrdf_load_stackoverflow)
GB (1) GB615295A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3108687A (en) * 1962-02-07 1963-10-29 Risdon Mfg Co Cosmetic container
US4938626A (en) * 1989-07-05 1990-07-03 Kuo Chun Liang Lead-replaceable writing implement with multiple lead channels

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2840042A (en) * 1952-06-11 1958-06-24 Andonov Christ Mechanical pencil
DE1511308B1 (de) * 1965-03-10 1971-04-08 Dainihon Bungu Co Ltd Druckschreibstift

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE37270C (de) * E. MAHLA in Nürnberg Bleistifthalter
US876223A (en) * 1907-09-06 1908-01-07 John A Newman Automatic magazine-pencil.
DE359276C (de) * 1922-09-21 Georg Glaeser Magazinschreibstift
DE437867C (de) * 1925-05-15 1926-12-04 Erich Schroeter Wechselschreibstift
US1666405A (en) * 1926-07-26 1928-04-17 Arthur C E Hamilton Magazine pencil
US1908386A (en) * 1924-06-14 1933-05-09 Wahl Co Mechanical pencil
US1964154A (en) * 1933-09-09 1934-06-26 Hertz Louis Lausen Selective mechanical pencil

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE37270C (de) * E. MAHLA in Nürnberg Bleistifthalter
DE359276C (de) * 1922-09-21 Georg Glaeser Magazinschreibstift
US876223A (en) * 1907-09-06 1908-01-07 John A Newman Automatic magazine-pencil.
US1908386A (en) * 1924-06-14 1933-05-09 Wahl Co Mechanical pencil
DE437867C (de) * 1925-05-15 1926-12-04 Erich Schroeter Wechselschreibstift
US1666405A (en) * 1926-07-26 1928-04-17 Arthur C E Hamilton Magazine pencil
US1964154A (en) * 1933-09-09 1934-06-26 Hertz Louis Lausen Selective mechanical pencil

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3108687A (en) * 1962-02-07 1963-10-29 Risdon Mfg Co Cosmetic container
US4938626A (en) * 1989-07-05 1990-07-03 Kuo Chun Liang Lead-replaceable writing implement with multiple lead channels

Also Published As

Publication number Publication date
FR934716A (fr) 1948-05-31
CH273716A (fr) 1951-02-28
GB615295A (en) 1949-01-04
BE471514A (enrdf_load_stackoverflow)

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