US1864038A - Mechanical pencil - Google Patents

Mechanical pencil Download PDF

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Publication number
US1864038A
US1864038A US117770A US11777026A US1864038A US 1864038 A US1864038 A US 1864038A US 117770 A US117770 A US 117770A US 11777026 A US11777026 A US 11777026A US 1864038 A US1864038 A US 1864038A
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US
United States
Prior art keywords
lead
pencil
casing
tube
propelling
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
US117770A
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English (en)
Inventor
Barberon Pierre
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.)
PENCIL MECHANISM Corp
Original Assignee
PENCIL MECHANISM CORP
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 PENCIL MECHANISM CORP filed Critical PENCIL MECHANISM CORP
Application granted granted Critical
Publication of US1864038A publication Critical patent/US1864038A/en
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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
    • B43K21/08—Writing-core feeding mechanisms with the writing-cores fed by screws
    • B43K21/14—Writing-core feeding mechanisms with the writing-cores fed by screws with writing-cores automatically replaced from magazines

Definitions

  • the present invention relates to mechan. ical pencils of the class in which the length of the lead point protruding outside the casing is at will regulated by the actuation of an appropriate head.
  • An obJect of thev invention is to provide Aamechanical. pencil which may be readily pencil means for imparting to the lead in- ⁇ ward or outward movements.
  • Another object is to provide a mechamcal pencil, wherein the rotation on a longitudinal axis of one of a pair of exteriorly accessible members with respect to the other will result in propelling a strip of lead outwardly from the tip of the pencil when the rotation is in one direction and in movingthe lead ⁇ inwardly when the rotation is in the other direction.
  • the invention accordingly comprises an article of manufacture possessing the features, properties, and the relation of elements which will be exemplified in the ar' ticle hereinafter described and the scope of the application of which will be indicated in the claims.
  • a pencil wherein a substantially centrally guided lead is longitudinally movable by means of a .device toothed, or otherwise appropriately shaped to grip the lead, said device being mounted for rotationv within the pencil; this device consisting pref.- eraoly of a long pinion mounted transversely to the lead, or of a worm gearing mounted parallel thereto.
  • the pinion may be driven by a gear wheel rim with a central bore for the passage of the lead, which rim is carried by a tube mounted4 for rotation inside the pencil.
  • the said'device ' consists' of a pinion mounted for rotation within the pencil, the toothing of the pinion extending tangentially to the lead, that is, in such way that the lead will be moved by a slight gripping action exerted by the teeth.
  • the pinlon is driven by the movement of an inner tubeprovided at its outer end with a control cap or head while its inner end preferably acts as a guide for the lead above the pinion.
  • the pinion may also be driven by a ratchet wheel actuated by means of a pawl and a spring.
  • the pawl may be mounted upon a part having an alternating back and forth movement within the holder and lengthwise thereto. This part may, if desired, either foi m one integral part with the inner tube, which, in this case would be mounted for lengthwise movement within the holder, or it may be se arate from the inner tube and be actuate by the rotary movement of the latter.
  • the operation When using a worm gear drive the operation may be eifected by displacement of the tube inside the holder; when this tube is mounted for rotation the operation may be effected' by means of a small pinion mounted a rotatable inner tube actuating a pinion by means of a toothed gear rim; Fig. l-is a oentral section; Fig. 2 a view and a partial central section taken at 90 to Fi 1; ⁇ Fig. 3 is a section ⁇ on line 3-3 (Fig. 1
  • FiV 4, 5, a and 6 show embodiments in whic a pinion is driven by a pawl and ratchet mechanism;
  • Fig. 4 is a central sec-v tion of one form of construction;
  • Fig. 5 a is a central sec-v tion of one form of construction;
  • Fig. 5* is a detail of a modified con struction
  • Fi 6 a artial view of a further modified orm. igs. 6 and 6b are details of certain of the parts shown in Fig. 6.
  • Figs. 7 and 8 show an embodiment with bevel gear (Fig. 7) or with spur geardrive (Fig. 8) arranged between a worm gear and a toothed gear rim of an actuating tube.
  • Fig. 8a is a partly sectional view of a form of construction similar to that shown in Fig. -7 but having a plurality of worms;
  • Figs. 9 to 12 show a further modified embodilnent; Fig. 9 is a central section through the pencil; Fig. a section on line 10-10 (Fig. 9) and Fig. 11 a section on line 11--11 (Fig. 9,). i
  • the pencil shown in Figs. 1 to 3 comprises an outer shell or casing 1 and a tubular part 2 fitting tightly withinand rigidly held by the shell.
  • This tubular part2 is connected to a smaller lead guiding tube 2 by a disc 2.
  • the shaftf of a long pinion 6 is carried in bearings in the wall of the tube 2;
  • this pinion being such that its toothing extends tangentially of the lead 4 in the pencil and the teeth of the pin.- ion lightly grip the same so that the rotation of the pinion will cause the lead to move either forwardly (in a downward direction) ⁇ or rearwardly (in an upward direction).
  • a third Vtube 7 the ⁇ upper screw threaded part of which, extending outside the tubes 1 and'2, carries upon its outer end a cap or head 8 by means of which-the tube 7 can be rotated in the tube 2.
  • This head is connected to the outer shell 1 by a screw 9 threadedly inserted through a flange on the head and extending into a groove 10 provided in the outer shell.
  • the lower end ofthe inner tube7 carries a part 11, the lower face of which, forming a toothed gear rim12, is adapted to engage the pinion 3 in such manner that a rotary movement of the head 8 will rotate vsaid pinion and thus determine thedisplacement of the lead in respect of the point of the holder.
  • the tube 7 is also used as a receptacle fory spare leads 4.
  • This receptacle becomes accessible b unscrewing the screw 9, withdrawingvt e tube 7 from the holder and unv screwin the head 8.
  • the member 11, forming the ttom part of the receptacle is provided'with a central bore with a diameter which isl but slightly greater than that of the lead so that thelatter will be guided thereby and held in engagement with thev pinion 6.
  • Thevupper part of themember 11 ,Y is funnel shaped.- After being partially used, the upper end of the writing lead -4 the invention in which the lead-propelling pinion isactuated through the medium of a pawl and ratchet mechanism.
  • the outer shell or casing 1a is formed near'its upper end with a longitudinal slot 10a instead of' ,o
  • the flange on the head 8 extends downwardl a greater distance than in the construction shown in Fig. l and carries the screw 9 'at a point adjacent the lower end of the flange so as to leave a space between the upper end A of the shell and the lower surface of the head.
  • This construction permits the inner tube 7a which is attached to the head to be moved longitudinally instead of being rotated.
  • - ratchet wheel 13 is mounted upon the lead# propelling pinion 6, and the innervtube 7 which is disposedffor longitudinal sliding l -ratchet wheel 13.
  • the straight pawl 14 shown in Fig. 5 would, when lowered, exert a pressure against the rathet wheel 13, while the bentvpawl'14, shown in Fig. 5, during its ascending movement, would turn the ratchet ⁇ wheelin the opposite direction.
  • Thevinner tube instead of carrying the ratchet directly, may also be built to act upon an intermediary part as shown in Fig. 6.
  • the outer shell 1 is formed with an annulargroove 10 ⁇ (as in Fig.
  • the inner t be 7b carries in its lower end a funnel-shape member formed, like the member 11 with a central lead-guiding bore; and with a downwardly projecting conical portion 39.
  • a part 16, held by a l spring 40 in an upward position and carryingv the pawl 14, is mounted for longitudinal sliding moveme'nt within ⁇ the tube 2b, which j in the present instance, is provided with a lon,- gitudinal slot 41 into which there projects a pin 42 carried by the part 16.
  • FIG. 7 shows another ⁇ embodiment lof thefq. f' invention in which the shaft 520i" the .pro
  • pelling means for the lead 4 is lodged above the bottom parts 2 and 2 of the tube 2.
  • the propulsion of the lead 4 is effected by means of a worm 6 which bears with a light pressure against the lead and thus moves the same longitudinally when the worm is rotated.
  • the worm is driven by a small pinion p mounted upon the shaft 56.
  • the pinion p may engage either directly teeth provided upon the actuating tube, oor those of the funnel shaped portion of the tube.
  • Bevel ears are provided on the inner surface o? the rim 120 of the funnel-shaped member 110 on the tube 7c and on the pinion p.
  • Fig. 8 shows a similar arrangement with spur gearing on the pinion p and the rim 12.
  • asimilar worm may be provided diametrally opposite the irst worm which is adapted; to exert a similar pressure against the lead but from the opposite side thereof.
  • the lead is thus held between two coacting Worms actuated by a common gearrim.
  • Fig. 8 Such an arrangement is shown in Fig. 8, the construetion being similar in all respects to the construction shown in Fig. 7, except that there are provided two worms 6c, each equipped with a pinion p meshing with the gear rim 120.
  • the actuatin tube may, if desired, also Y f be adapted to escribe a longitudinal movement, in 'which case the connection of this tube with the propelling worin maybe realized by any appropriate mechanical means.
  • Fig. 9 to 12 show this disposition.
  • the inner tube 7d carrying thefunnel shaped part 11d and the gear rim 1 2d which engages the pinion p of the worm 6d does not. extend upwardly int-o the head of the pencil.
  • the head 8d which in this case is not utilized for actuatingl the device,- is stationary.
  • the device is actuated by means of a longitudinally slidable tube 20 which also serves as a guide for the lead and protrudes beyond the end .of the outer-shell 1 forming the point 20 of the pencil.
  • the tube-2O is rigidly.connectcd to twoparts 21 and 22 mounted for sliding movement in a tube 23. This tube is frictionally held within the outer shell 1d of the pencil.
  • the part 21 is guided by lugs ⁇ 26 adapted to slide within corresponding longitudinal slots 24 provided in the tube 23.
  • a worm 6d is mounted, between the parts 21 and 22.
  • Thepinion p is mounted on the upper end of the worm shaft 25, and 'thel lower part 46 of the worni shaft is carried by the part 21, while its upper part extends through a longitudinal slot 27 provided in part 22.
  • the upper edge of the tubular ⁇ body 7d is provided with saw teeth 28 adapteli to engage the teeth 30 of another tubular body 29 disposed above the former.
  • the tubular part 29 is guided within the tube 23 by means of lugs adapted to be engaged within inclined or helicoidal slots 32 provided in the tube 23 in such manner that the tubular part 29 cannot be moved longitudinally without describing simultaneously a corresponding rotary movement.
  • a spring 33 mounted in the upper ortion of the tube 23 acts against the tubu ar part 29.
  • said driving means including a movable inner tube within the body of the pencil and transmission means between said inner tube and said lead propelling element whereby the lead propelling element is rotated by the movement of said inner tube.
  • a mechanical lead pencil in combination, lead guiding means, a toothed lead propelling element rotatably mounted within the body of the pencil and engagin the lead tangentially, and driving means or rotating said lead propelling element, said driving means including an inner tube rotatably mounted within the body of the pencil, a toothed gearrim connected to said inner tube l and a pinion mounted for engagement' with said ear rim.
  • a mechanical lead pencil in combination, lead guiding means, a toothed lead propelling element rotatably mounted within the body of the pencil and engaging the lead .tangentially, and driving means for rotating said lead -propelling element, said driving means including an inner tube slidably mounted within the body o f the encil, and a pawl and ratchet device adapte to impart rotary movement of said llead-propelling element in response to longitudinal sliding movement of said inner.tube.
  • a mechanical lead pencil comprising an 'outer shell, an inner tube rotatably mounted within said shell, exteriorly accessible means for imparting rotation to said inner tube, a toothed lead guiding part connected to said inner tube and'having a funnel shaped upper portion, a central bore in said toothed lead Aguiding -part,a1 1d a pinion driven byv said toothed art ,and engaging the lead tangentia y, said inner tube forming a spare lead receptacle the ⁇ bottom portion oi which, formed by said funnel shaped art is adapted to direct toward said bore lea s contained in said receptacle.
  • a mechanical lead pencil comprising a'n outer shell, an inner tube slidably mounted within said shell, an exteriorly accessible element adapted to impart longitudinal movement to said inner tube, a toothed lead guiding part connected to said inner tube and having a funnel shaped upper portion, a
  • a mechanical lead Apencil comprising an outer shell, a tubular part rictionally heldl therein and ca verbd diameter guiding the lead extending beyond the point of the holder, an inner tube rrying'a tubular part of re-- Vmounted in said 'outer' shell, said inner tube formed toprovide a funnel shaped portion toward its lower end, a gear provided on said inner tube at a point beneath said funnel shaped portion, a pinion adapted to be driven by said gear and mounted on the shaft of a of the pencil, means for guiding leads successively from said magazine to the lower end of the pencil, lead-feeding means within the casing and adapted to move a lead either downwardly or upwardly at will, and means for operating said lead-moving means, the last-mentioned means comprising an operating member within the casing and an exteriorlyfaccessible element for actuating said operating member.
  • a magazine pencil a casing, means providing a lead magazine in the upper end of the pencil, means for guiding leadssuccessively from said magazine to the lower end of the pencil,v lead-feeding means within -the casing and adapted to move a lead either downwardly or upwardly, said means compr-ising a rotatable element adapted to engage the lead tangentially, and means for rotating said rotatablepelement in one direction or in ⁇ the other at will, the last-mentioned means comprisin an operatin i member within the casing an an exterior y-accessible element for actua-ting said operating member.
  • a magazine pencil a casing, an inner tube movable with respect to said casingy means including said inner tube to provide a magazine for lead strips, means mounted within said casing and operated by the movement of saidtube relative to said casing and arranged for constant engagement with a lead. sively from said magazine and for feedin the same downwardly out of the casing, and exteriorily accessible means for actuating said inner tube.
  • means including said inner tube to provide a lead magazine in the upper part of the casin g, rotatable lead-propelling means Within the casing and beneath -said magazine, means carried by said inner tube for rotating said propelling means, and exteriorly accessible means for actuating the last named means.
  • a. casing means providing a lead magazine in the upper end of the pencil, means for guiding strips of lead successively downwardly from said magazine, lead-feeding means mounted in the pencil within the casing at a point beneath said magazine and adapted to engage a lead tangentially and to be operated-2 to impart downward movement to the lead, a member within said casing for operating the last mentioned means, and an exteriorly-accessible element for actuating said operating member.
  • a mechanical lead pencil a casing, rotatable lead-propelling means within the casing adapted to 'engage a lead( tangentially and when rotated to .impart longitudinal movement to the lead, and means to rotate said lead-propelling means, the last-mentioned means comprising an operating member within the casing and aireXteriorlyaccessible element for actuating said operating member.
  • rotatable lead-propelling means adapted to engage a lead tangentially and when rotated to impart longitudinal movement to the lead, an exteriorly accessible actuating element, and means to impart rotation to said lead-propelling means in response to the actuation of said exteriorly accessible element.
  • a mechanical pencil in combination, a casing, a head movable with respect to said casing, 'rotatable lead-propelling means adapted to 'engage tangentially a ead in a pencil and when rotated to impart longitudinal movement to the lead, and means for rotating said lead-propelling means in response to relative 'movement of said head and said casing.
  • a mechanical pencil in combination, a casing, a head rotatable with respect to said casing, rotatable lead-propelling means adaptedto engage tangentially a lead in'a ⁇ pencil and when rotated to impart longitudinal movement to the lead, and meansfor rotating said lead-propelling means in response to relative rotation of said head and said casing.
  • a mechanical pencil in combination, a casing, a head rotatable with respect to said casing, rotatable lead-propelling means adaptedto engage tangentially a lead in'a ⁇ pencil and when rotated to impart longitudinal movement to the lead, and meansfor rotating said lead-propelling means in response to relative rotation of said head and said casing.
  • a mechanical pencil In a mechanical pencil, a casing, an inner tube mounted for rotation within the same, a rotatable lead-propelling element adapted to engage the lead tangentially, and means carried by said inner tube for rotating said lead-propelling element in response to the rotation of said inner tube.
  • an inner tube mounted for rotation -on a longitudinal axis, a le-ad-propelling element mounted for rotation on a transverse axis, and means carried by said inner tube for rotating said leadpropelling element in response to the rotation of said inner tube.
  • the last-mentioned means comprising an operating memberlwithin the casing and an exteri'orl -accessible element for actuating said 29.
  • a mechanical pencil comprising a casing, in combination, a worm within the casing arranged to engage a lead in the pencil and to movethe same longitudinally, and means to rotate said worm, the last-mentioned means comprising an operating member within the casing and an exteriorly-accessible element for actuating said operating member.
  • a mechanical pencil in combination, atworm arranged to engage -a lead in the pencil and to move the same longitudinally, an exteriorly accessible actuating element, and means to rotate said worm in res onse to the actuation of said exteriorly accessi le element.
  • a mechanical. pencil in combination, a rotatable lead-enga ing and V-propelling worm, a pinion carried thereby, a. rotatable operating member, said operating member being formed with teeth adapted to mesh with said pinion to rotate the same, an exteriorly accessible element, and means for importing rotation to said operating member in response to the actuation ofsaid exteriorly accessible element.
  • a lead gui e tube In a mechanical pencil com rising a casing, in combination, a lead gui e tube, a worm within' said casing and extendin through an openingin said ide tube-an adapted to engage tangential y a lead in the pencil, and means for rotating said worm, the last-mentioned means comprising an operating member within the casing and an exterirly-aocessible element for actuating said operatmg member.
  • a mechanical pencil comprising a casing, in combination, arotatable leadpropelling element.- within the casing and adapted to engage a lead tangentially at a pluralityof points throughout a considerable portion ofthe length of the lead and when. rotated to impart longitudinal. move# ment to the lead, and meanslto rotate said within the casing and an exteriorly-accessible glement for actuating said operating mem- 35.
  • a magazine pencil comprising a casing, in combination, means providing a.
  • a lead-guiding tube for guiding a lead downwardly from said magazine, said tube being arranged for the reception of a rotatable leadprope ling element in the side thereof, a rotatable lead-propelling element within the casing and adapted to engage tangentially a lead within said guide tube, and means to rotate said lead-propelling element, the lastmentioned means comprising an' operating member within the casing and an exteriorlyaccessible element for actuating said operating member.
  • a casing in combination, a casing, means movablewith res ct to said casing and serving to provide a ead magazine in the upper end of the pencil, a worm adapted to engage a lead falling from said magazine and to move the same downwardly through and out ofthe pencil, and means including said movable means for rotatingfsaid worm.
  • a mechanical pencil in combination, a casing, a member extendin downwardl through the lower en d of t ecasing an ward pressure exerted on an upper part of the pencil, a rotatable lead-propelling'elamentl adapted to engage tangentially a lead in the ncil, and means to rotate said leadprope mgelement in 'responseto longitudiladapted to be moved longitudinally by downics nal movement of said downwardly extending member.

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  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
US117770A 1925-06-24 1926-06-22 Mechanical pencil Expired - Lifetime US1864038A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR612389T 1925-06-24
GB15452/26A GB274997A (en) 1925-06-24 1926-06-18 Improvements in pencil holders

Publications (1)

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US1864038A true US1864038A (en) 1932-06-21

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US117770A Expired - Lifetime US1864038A (en) 1925-06-24 1926-06-22 Mechanical pencil

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US (1) US1864038A (enrdf_load_html_response)
BE (1) BE335158A (enrdf_load_html_response)
DE (1) DE481114C (enrdf_load_html_response)
FR (2) FR612389A (enrdf_load_html_response)
GB (1) GB274997A (enrdf_load_html_response)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2504420A (en) * 1947-03-31 1950-04-18 Parker Pen Co Magazine pencil with rotary lead propelling means
US2511243A (en) * 1944-08-11 1950-06-13 John T Brubaker Feeding mechanism for pencils, lighters, etc.
US2627246A (en) * 1948-01-16 1953-02-03 Ibm Mechanical pencil with lead advancing means
US8794857B2 (en) 2011-09-06 2014-08-05 Dean Handrinos Non-consumable writing implement with consumable tip having constant orientation

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4850551A (en) * 1987-12-14 1989-07-25 Lockheed Corporation Propulsion system for a buoyant vehicle
CA2048038C (en) * 1990-11-13 1995-02-28 J. Richard Cox Applicator for soft materials
US5230577A (en) * 1990-11-13 1993-07-27 Maybelline, Inc. Applicator for soft materials

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511243A (en) * 1944-08-11 1950-06-13 John T Brubaker Feeding mechanism for pencils, lighters, etc.
US2504420A (en) * 1947-03-31 1950-04-18 Parker Pen Co Magazine pencil with rotary lead propelling means
US2627246A (en) * 1948-01-16 1953-02-03 Ibm Mechanical pencil with lead advancing means
US8794857B2 (en) 2011-09-06 2014-08-05 Dean Handrinos Non-consumable writing implement with consumable tip having constant orientation

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Publication number Publication date
GB274997A (en) 1927-08-04
FR31981E (fr) 1927-08-27
BE335158A (enrdf_load_html_response)
FR612389A (fr) 1926-09-22
DE481114C (de) 1929-08-14

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