US2509849A - Lead feeding and holding construction for propelling pencils - Google Patents

Lead feeding and holding construction for propelling pencils Download PDF

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Publication number
US2509849A
US2509849A US790611A US79061147A US2509849A US 2509849 A US2509849 A US 2509849A US 790611 A US790611 A US 790611A US 79061147 A US79061147 A US 79061147A US 2509849 A US2509849 A US 2509849A
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US
United States
Prior art keywords
lead
jaws
housing
sleeve
chuck
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
US790611A
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English (en)
Inventor
Allmen Fritz Von
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.)
Fabrique Suisse de Crayons Caran dAche SA
Original Assignee
Fabrique Suisse de Crayons Caran dAche SA
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 Fabrique Suisse de Crayons Caran dAche SA filed Critical Fabrique Suisse de Crayons Caran dAche SA
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Publication of US2509849A publication Critical patent/US2509849A/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • B43K21/22—Writing-cores gripping means, e.g. chucks

Definitions

  • This invention relates. to ⁇ propelling pencils, and is particularlyconcerned ⁇ with improvements n'propelling pencils ofthe kind-comprising a cylindrical-.housing ⁇ 'tapered at one end, a leadguiding tube providedA at. one end with-icon ⁇ movement of the lead-guiding. tube; ⁇
  • the present invention hasas its object toA pron vide a propelling pencil of thetype described,
  • the irnopposite to the tapered end ⁇ thereof, whereby the proved propelling pencil is characterised by the lead-guiding tube andthe chuck jaws maybe l5 fact that the auxiliary jaws are each positioned moved against the actionof the spring', and an between two adjacentnjasws ot the cont-ractible element ⁇ co-axial with the lead-guiding Stube and chuck and are lconnected to a radially resilient movable freely between two ⁇ extreme positions, sleeve, the arrangement being such that by coone of which is determined by a stop on the tube, operation with Athe interior wall of the tapered said element having auxiliary-:jaws connected end -of the housingsaid auxiliary jaws may be thereto by shank portionsand operating during caused to grip the lead during forward ⁇ Inovepart of the forward .movement of the learl-guidment or the sleeveand to iriction
  • the auxiliary jawsr may comprise convergent sure on the operatingmemben-such as a knob parts ⁇ adapted to engage frictionally with the protruding-froinithe end oi the housing, causes interior wall of'the tapered end of the housing advancement ⁇ of the lead to a predetermined and the release of-thelsleeve from rictional enextent and the operation thereof isgenerally gagement with the housing during return movement of the leadfguidingtube may be effected In the knownconstructions or pencils of this by engagement ofi-an ⁇ enlargement ofthe chuck kind, however, the auxiliary-jaws which retain jaws including l an externally tapered the lead in an advanced position druing ⁇ part of adapted to engage the said sleeve for eiecting the return movement, or ⁇ the .lead-,guiding tube movement thereof ⁇ out ofk engagement Awith the which takes place onrelease of axial pressure on
  • Fig. 1 is a side elevation, partly in section, il length o the leadloecoirues ⁇ shorter than the lustrating one.iembodiment ⁇ of propelling pencil length-of the chuck jaws, ⁇ including the shank according to the;4 invention, ⁇ showingthe load portions mounting thereoi, plustheuaxial grippedfbetweenthe chuck jaws; distanceof ⁇ displacement ofthe .auxiliary jaws, Fig.,2 is asimilar.
  • the housing I of the propelling pencil having a cylindrical inner wall is formed with a tapered end which is provided with an internal tapered seat 2.
  • a lead-guiding tube 3 carrying at one of its ends spring chuck jaws 4, is subject to the action of a spring 6 which engages an annular ange 5 on the tube 3 and tends to hold the jaws 4 against the seat 2, which thus co-operates with the front part I5 of the rearwardly tapered part IE-Il formed by the exterior surface of the tapered shank portion of the jaws l.
  • the lead-guiding tube terminates at its other end in a push-knob 'I protruding from the housing I.
  • the shank portions of the chuck jaws 4 extend from a part I screwed to the tube 3 and on the sleeve 8 converging arms forming auxiliary jaws 9 are provided, each jaw 9 being positioned be tween two adjacent jaws 4 of the chuck.
  • the sleeve 8 is freely movable in relation to the chuck jaws 4 between two extreme positions, one of which is determined by stop means, such as the part I0, associated with the tube 3, and the other by the externally tapered or enlarged part of the chuck jaws 4.
  • the sleeve is provided with longitudinal slots II to secure radial resilience.
  • the auxiliary jaws 9 converge towards the front ends and are adapted to co-operate with the interior wall of the tapered end of the housing towards the end of the forward movement of the lead-guiding tube so as to cause the jaws 9 to grip the lead and to engage the sleeve 8 frictionally with the housing I for retaining the lead in an advanced position.
  • Fig. 1 the parts of the propelling pencil are shown in the working position, the lead I2 being held tight by the jaws 4 which are caused to contract by the action of the spring 6 in the direction F, which draws the front part I6 of the rearwardly tapered part of said jaws 4 into the seat 2.
  • the propelling pencil hereinbefore described operates in the following manner:
  • the push-knob 'I moves the lead-guiding tube 3 and the jaws 4 until the part IG comes in contact with the rear edge 50 of the sleeve 3.
  • the sleeve 8 is moved axially and the jaws 9 come into contact with the interior wall 2l of the tapered end of the housing which progressively stops axial movement of the sleeve accompanied by radial contraction thereof so as to cause the jaws 9 to grip the lead I2 at the same time as the jaws 9 become wedged in the tapered end of the housing.
  • the lead I 2 is advanced in the same degree as the push-knob 'I because, during the forward travel of the latter, it is carried along by the shank parts of the jaws 4, said shank parts exerting sufcient radial resilient pressure to engage the lead frictionally.
  • the spring '6 effects the return movement of the lead-guiding tube 3 and of the jaws 4 in the direction F.
  • the sleeve il is held by the wedging of the auxiliary jaws 9 against the interior wall ZI of the tapered end of the housing.
  • the front part I6 of the rearwardly tapered-v part of the jaws 4 again co-operates with the ⁇ seating 2 of the housing I in order to bring about the eiective gripping of said jaws on the leadi I2, the lead-guiding tube 3 being thereby arw rested.
  • the propelling pencil hereinbefore described although it comprises a small number of components, as compared with known pencils, functions very reliably. None of the components, which are of the simplest form, require precise machining. Furthermore, assembly is easy, so that the improved propelling pencil is inexpensive to manufacture.
  • the lead I2 can be advanced in the manner described until it is almost completely used up.
  • the inner wall of the tapered end of the housing I has, between two conical bores 22 and 23, a cylindrical bore 24 of which the effective diameter is slightly smaller than the external diameter Dof the sleeve 8, as can be seen in Fig. '7, this sleeve terminating at the rear end in an annular edge 25.
  • the unit formed by the sleeve 8 and the auxiliary jaws 9 is of substantially the same form as that described inconnection with Figs. 1 to 4.
  • the lead-guiding tube 3 has a stop in the shape of a cylindrical extension 26 and the chuck jaws 4a have, where they are fixed to the lead-guiding tube, a collar 2l the diameter of which is approximately the same as the internal diameter d (Fig. '7) of the sleeve 8, said collar 2'! serving to locate the sleeve 8 co-axial with the extension 2E.
  • the jaws 4a comprise on their exterior surface two rearwardly tapering parts, a front part Ilia and a rear part I'Ia.
  • the knob (not shown) is pressed to move the lead-guiding tube 3 and the jaws 4a from the working position (shown in Fig. 5) to the position of maximum advancement (shown in Fig. 6) in which the jaws 4 are opened.
  • the extension 26 pushes the sleeve 8 in the direction M by engagement with its rear edge 25, the collar 21 being already engaged in the sleeve 8 to locate the same.
  • a propelling pencil comprising a 'housing 'having atapered 4end including a seat, fa lead- Yguiding tube vaxially slidable in -sa-idhousing for positioning alead co-axially with said tapered end, an operating member on the said tube and projectingfrorn theend of the housing opposite to" the said tapered end, a contractible lead-gripping chuck protruding thrcughvthe said tapered Vend of the housingiand comprising multiple jaws having shank portions'extendingfrom an abutment'associated 'with *the adjacent end of the lead-guiding tube," ⁇ sai'd jaws having an enlarge- ⁇ 'nient including a rearwardly tapered part for cooperation with said seat, ⁇ a spring acting to press Vthe saidlead-gding tube rearward to draw said chuck jaws intothe said seat whereby said jaws are caused to gripalead, and a sleeve ele
  • 'A propelling pencil comprising ahousing 'a" tapered i end lincluding 'a seat, a leadpositioning a. lead cio-axially withzsairi 'tapered end, l a'n operating member Ton the :said "tube and projecting l from the 'end of #the housing opposite to the said tapered end, a contractible leadgripping chuck protruding through "the .said tapered end of the ⁇ housing andcomp'ri'singmulfor cooperation with said seat, asprin'g" acting-to press the saidlead-g'uidingtube rearward to draw s'aid'chuck jaws into the said seatwhereby said jaws are causedtofgripa lead, ⁇ arida sleeve ele- ⁇ nient onthesaid shank-portions relatively movable in theaxial direction, the relative movement of the said sleeve being limited -inlonedirction bythe said'ienlargement
  • B. YA propellin'g - ⁇ pencil comprising a Vhousing having a tapered '-end 'including a seat, a lead- Sguidingtube 'axially' 4slidable in 1Asaid i housing for .f'positioning a lead cio-axially withsaid ⁇ tapered end, an operating member on the ⁇ said tube and fprcjectingfroni the endof the housing'ppposite to the said tapered end, a contractible lead-grip- -ping chuck protruding ⁇ through the said tapered fend ofthehousing"andfcoinprisin'g finultiplejaws having!
  • a propelling pencil comprising a housing having a tapered end including a seat, a leadguiding tube axially slidable in said housing for positioning a lead co-axially with said tapered end, an operating member on the said tube and projecting from the end of the housing opposite to the said tapered end, a contractible leadgripping chuck protruding through the said tapered end of the housing and comprising multiple jaws having shank portions extending from an abutment associated with the adjacent end of the lead-guiding tube, said jaws having an enlargement including a rearwardly tapered part cooperating with said seat, a spring acting to press the said lead-guiding tube rearward to draw said chuck jaws into the said seating whereby said jaws are caused to grip a lead, and a sleeve element on the said shank portions relatively movable in the axial direction, the relative movement of said sleeve being limited in one direction by the said enlargement of said jaws and in the other direction by the said abutment, said sle
  • a propelling pencil comprising a housing having a tapered end including a seat, a leadguiding tube axially slidable in said housing ior positioning a lead co-axially with said tapered end and having an intermediate external flange, an operating member on the said tube and projecting from the end of the housing opposite to the said tapered end, a contractible lead-gripping chuck protruding through the said tapered end of the housing and comprising multiple jaws having shank portions extending from an abutment member detachably connected to the adjacent end of the lead-guiding tube, said jaws having an enlargement including a rearwardly tapered part cooperating with said seat, a spring disposed between said external flange and said tapered end of said housing and acting to press the said lead-guiding tube rearward to draw said chuck jaws into the said seat whereby said jaws are caused to grip a lead, and a sleeve element on the said shank portions relatively movable in the axial direction, the relative movement of said slee
  • a propelling pencil comprising a housing having a tapered end including a seat, a leadguiding tube axially slidable in said housing for positioning a lead co-axially with said tapered end, an operating member on the said tube and projecting from the end of the housing opposite to the said tapered end, a contractible leadgripping chuck protruding through the said tapered end of the housing and comprising a tube split longitudinally to provide multiple jaws having shank portions separated by slots and connected to an abutment member screwed to the adjacent end of the lead-guiding tube, said jaws having an enlargement including a rearwardly tapered part cooperating with said seat, a spring acting to press the said lead-guiding tube axially to draw said chuck jaws into the said seat whereby said jaws are caused to grip a lead, and a sleeve element on the said shank portion relatively movable in the axial direction, the relative movement of said sleeve being limited in one direction by the said enlargement of said jaws and in
  • a propelling pencil comprising a housing having a tapered end part including an end seating at its extremity and an internal tapered seat communicating at its small end with a cylindrical bore terminating in an annular abutment, a lead-guiding tube axially slidable in said housing for positioning a lead co-axially with said tapered end and having an annular extension, an operating member on the said tube and projecting from the end of the housing opposite to the said tapered end, a contractible lead-gripping chuck protruding through the said tapered end of the housing and comprising multiple jaws having shank portions extending from a tubular element tted within the said annular extension of the lead-guiding tube, said jaws having an enlargement including la rearwardly tapered part (3o-operating with said end seating, a spring acting to press the said lead-guiding tube axially to draw said chuck jaws into the said end seat whereby said jaws are caused to grip a lead, and a sleeve element on the said shank portion relatively movable
  • a propelling pencil comprising a housing having a tapered end part including an end seat at its extremity and an internal tapered seat communication at its small end with a cylindrical bore terminating in an annular abutment, a lead-guiding tube axially slidable in said housing for positioning a lead co-axially with said tapered end and having an annular extension, an operating member on the said tube and projecting from the end of the housing opposite to the said tapered end, a contractible lead-gripping chuck protruding through the said tapered end of the housing and comprising multiple jaws having shank portions extending from a tubular element fitted into said annular extension, said tubular element having an external collar projecting at the lower end of said extension and said jaws having an enlargement including a rearwardly tapered part co-operating with said seating and an abutment, a spring acting to press the said lead-guiding tube rearward to draw said chuck jaws into the said end seat whereby said jaws are caused to grip a lead, and a sle

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  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
US790611A 1947-09-10 1947-12-09 Lead feeding and holding construction for propelling pencils Expired - Lifetime US2509849A (en)

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Application Number Priority Date Filing Date Title
CH2509849X 1947-09-10

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US2509849A true US2509849A (en) 1950-05-30

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US (1) US2509849A (fr)
CH (1) CH262818A (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE957460C (de) * 1953-12-29 1957-01-31 Faber Castell A W Minenhalter fuer Flachminen
US3450482A (en) * 1967-06-12 1969-06-17 Tru Point Products Inc Pencil lead holder with fixed length feed
US4844639A (en) * 1987-10-21 1989-07-04 Chao Wen Kwei Push-type writing instrument
US4856693A (en) * 1987-02-23 1989-08-15 Kotobuki And Company, Ltd. Working out container of bar shaped article
US5165813A (en) * 1991-07-23 1992-11-24 Kotobuki & Co., Ltd. Container with snap-in chuck and chuck ring
US20070025800A1 (en) * 2005-07-26 2007-02-01 Biss Product Development Llc Mechanical pencil
ITMI20090536A1 (it) * 2009-04-03 2010-10-04 Chromavis Spa Prodotto cosmetico multifunzionale in forma di matita con elemento truccante intercambiabile

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE842907C (de) * 1951-01-30 1952-07-03 Josef Vastmann Fuellbleistift
DE972637C (de) * 1953-10-23 1959-08-27 Faber Castell A W Druckfuellstift

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US392536A (en) * 1888-11-06 Pencil holder

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US392536A (en) * 1888-11-06 Pencil holder

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE957460C (de) * 1953-12-29 1957-01-31 Faber Castell A W Minenhalter fuer Flachminen
US3450482A (en) * 1967-06-12 1969-06-17 Tru Point Products Inc Pencil lead holder with fixed length feed
US4856693A (en) * 1987-02-23 1989-08-15 Kotobuki And Company, Ltd. Working out container of bar shaped article
US4844639A (en) * 1987-10-21 1989-07-04 Chao Wen Kwei Push-type writing instrument
US5165813A (en) * 1991-07-23 1992-11-24 Kotobuki & Co., Ltd. Container with snap-in chuck and chuck ring
EP0524600A1 (fr) * 1991-07-23 1993-01-27 KOTOBUKI & CO., LTD. Récipient pour faire sortir une substance en forme de baton
US20070025800A1 (en) * 2005-07-26 2007-02-01 Biss Product Development Llc Mechanical pencil
US7645083B2 (en) * 2005-07-26 2010-01-12 Biss Product Development Llc Mechanical pencil
ITMI20090536A1 (it) * 2009-04-03 2010-10-04 Chromavis Spa Prodotto cosmetico multifunzionale in forma di matita con elemento truccante intercambiabile
EP2238860A1 (fr) * 2009-04-03 2010-10-13 CHROMAVIS S.p.A. Produit cosmétique multifonction sous forme de crayon doté d'un élément de maquillage interchangeable

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Publication number Publication date
CH262818A (fr) 1949-07-31

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