US3111116A - Propelling pencil - Google Patents

Propelling pencil Download PDF

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Publication number
US3111116A
US3111116A US43226A US4322660A US3111116A US 3111116 A US3111116 A US 3111116A US 43226 A US43226 A US 43226A US 4322660 A US4322660 A US 4322660A US 3111116 A US3111116 A US 3111116A
Authority
US
United States
Prior art keywords
lead
blade
trough
pencil
guiding tube
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
US43226A
Other languages
English (en)
Inventor
Jeanmonod Charles
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
Application granted granted Critical
Publication of US3111116A publication Critical patent/US3111116A/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
    • B43K21/08—Writing-core feeding mechanisms with the writing-cores fed by screws

Definitions

  • My invention has for its object a propelling pencil of the type including a tubular body carrying a lead-guiding tube and means for producing a progression of the lead.
  • the difficulty is well known which is met when engaging a fresh lead into the opening of the lead-guiding tube in a propelling pencil, in particular when said opening has a small cross-section.
  • My improved propelling pencil has for its object to remove such drawbacks and its novelty consists in the fact that a fraction of the wall of the lead-guiding tube is movable and this allows opening laterally the leadguiding tube for engagement of the lead transversely into said tube while locking means are adapted to hold the movable wall in its operative closing position.
  • FIGS. 1 and 3 are an axial cross-sectional view of a propelling pencil.
  • FIG. 2 is a cross-section through line 11-41 of H6. 1.
  • the propelling pencil illustrated in the drawing in cludes a tubular body 1 of, for example, hexagonal crosssection and is provided with a longitudinal opening to in its side wall. in one of the ends of .the body, there is fitted a lead-guiding tube 2 which also forms the tip of the pencil.
  • Said lead-guiding tube 2 includes an elongated trough-shaped member 3, and a blade 4- movable into and out of said opening la: and adapted to engage the trough formed by the member 3 so as to form a movable Wall closing the complete guiding tube 2.
  • the inner surface of the tube 2 adapted to guide and carry the lead 5 has a rectangular cross-section as illustrated in FIG. 2.
  • the pencil is thus intended for carrying fiat leads the thickness of which ranges generally between 030 and 0.45
  • the blade 4 is pivotally secured to the trough-shaped member 3 and to this end the member 3 is urged with a force fit inside a sleeve 6 provided with a slot 7 registering with the lateral opening in said member 3.
  • Said sleeve 6 is also provided with a transverse recess 8 inside which is fitted a pin 9 forming the pivotal connection for the blade 4.
  • Locking means are provided to ensure the steady setting in its operative position of the wall formed by the blade 4.
  • the locking means include a U-shaped spring ll surrounding the trough 3 as illustrated in FIG. 2.
  • the terminal flanges 11 formed on the spring it are adapted to engage recesses 12 formed in the two cooperating opposed surfaces of the blade 4.
  • the bottom of said recesses 12, forms a slope 13 so that under the clamping action, of the terminal flanges ll of the spring ll), the blade 4 has a tendency to engage the surface of the lead 5 fitted in the bottom of the troughshaped member 3.
  • the trough-shaped member 3 is provided furthermore along one of its surfaces and near the tip of the pencil with a notch 14.
  • the blade E is correspondingly provided along one of its sides with a recess the location of which registers with that of the notch 14 in the member 3 when the blade has engaged the body of the pencil.
  • the recess 15 in the blade allows opening the lead-guiding tube 2 through insertion of the operators Sdlldid Patented Nov. 19, 1963 nail inside said recess with a view to exerting an outwardly directed stress on the latter.
  • the opening of the leadguiding tube 2 is thus performed in the same rnanner as the opening of a pocket knife.
  • a notch 14 may be formed on both sides of the trough 3 to face respectively the two surfaces of the blade 4 each of which is then provided with a recess 15.
  • My improved propelling pencil is furthermore provided with a conventional screw-operated mechanism providing for the progression of the lead.
  • a tubular screw 16 engages a rear extension of a reduced cross-section 17 on the sleeve 6.
  • said screw 16 carries a knurled knob 13 providing for the control of the lead and of which the front or inner section 19 is fitted inside the tubular screw 16.
  • a pin 29 engaging transversely said screw 16 rigidly connects the knob with said screw.
  • the rear end of the body 1 is provided with a tapping 21 inside which is screwed a threaded nut 22 the inner end 23 of wh'ch forms an axial stop for a collar 24 rigid with the inner corresponding end of the knob 15;.
  • a ring 23 is fitted with a force fit over the rear end of the member 35 so as to form a stop for said toothed member 26 and to define the maximum receding movement of the pusher rnernber 2-5.
  • Said ring 28 provides simultaneously for the centering of the member 3 inside the tubular screw 16.
  • the body 1 is slotted longitudinally so as to allow the blade 4- to enter its outer in operative position as shown in dot and dash lines in FIG. 1, said body 1 has a sufficient elasticity for it to allow the engagement into it of the lead-guiding tube 2, throuw the rear of the body 1, said engagement opening transiently the flange 3% until the latter returns elastically into the groove 29 so as to lock therein the lead-guiding tube 2 with reference to the body 1.
  • the movable Wall formed by the blade instead of being pivotal-1y secured to the lead-guiding tube 2 may be removable and drawn either through a longitudinal tractional action or through a lateral movement out of the trough 3.
  • the structure illustrated is preferable since it cuts out any risk of loss of the blade t.
  • the blade in The back of said blade may be provided between its pivotal point 9 and the tip of the actual pencil with a boss while the blade 4 extends furthermore rearwardly of its pivotal point 9 in a manner such as to form also a boss to the rear of said pivotal point; a ring fitted over the outer tube 2 of the pencil is in such a case adapted to slide axially between the bosses so as to hold the blade 4 in the trough 3 for the front position of the ring by engaging the front boss on the blade 4, whereas for the rear position of the ring the latter produces a rocking of the blade round its pivot by bearing over the rear boss so that the opening of the lead-guiding tube 2 would be produced in this case [indirectly through a shifting of the ring towards the rear end of the pencil.
  • the preceding disclosure refers more particularly to a pencil provided for operation with fiat leads.
  • said structure is applicable to pencils carrying leads of any cross-section whatever Whether square, rectangular, polygonal, round, ellipsoidal or the like, the trough and the blade system being given then obviously a corresponding inner shape.
  • a mechanical pencil comprising a tubular body, a lead guiding tube within said body, means for advancing a lead, said lead guiding tube comprising a longitudinally grooved trough-like member extending to the tip of the pencil, said body having a longitudinal slot in registry with the groove of said trough-like member, a blade rpivotally secured to said trough-like member near the end thereof opposite the tip of the pencil, said blade movable into and out of the slot in said body and the groove in said tube, said blade when in closed position donning a laterally movable side wall tor said lead guiding tube and when in opened position permitting access thereto for insertion of the lead, locking means within said body and carried by said trough like member to engage said blade and retain it in closed position.
  • the locking means for said blade comprises a spring of substantially U-shape embracing said trough-like member, said spring having a pair of flanges engaged in related recesses formed in opposite sides of said blade, the bottom of said recesses being inclined so that pressure exerted by said spring is constantly applied to said blade when the latter is in closed position thereby causing it to clamp the lead in said trough-like member.
  • a mechanical pencil according to claim 2 wherein the trough-like member is provided with a notch along one surface near the tip of the pencil and the blade is provided along one of its sides with a recess in registry with said notch to penmit opening of the lead guiding tube by insertion of the operators nail in the recess of said blade.

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  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
US43226A 1959-07-22 1960-07-15 Propelling pencil Expired - Lifetime US3111116A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH3111116X 1959-07-22

Publications (1)

Publication Number Publication Date
US3111116A true US3111116A (en) 1963-11-19

Family

ID=4574186

Family Applications (1)

Application Number Title Priority Date Filing Date
US43226A Expired - Lifetime US3111116A (en) 1959-07-22 1960-07-15 Propelling pencil

Country Status (3)

Country Link
US (1) US3111116A (fr)
CH (1) CH353653A (fr)
FR (1) FR1261713A (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US555690A (en) * 1896-03-03 Lead-pencil
FR347196A (fr) * 1904-10-18 1905-02-27 Eduard Dussek Porte-crayon et taille-crayon combinés
US2274311A (en) * 1941-05-05 1942-02-24 Listo Pencil Corp Mechanical pencil
US2516938A (en) * 1950-02-10 1950-08-01 Francis M Aimes Mechanical pencil with screw feed
DE803584C (de) * 1948-10-02 1951-04-05 Fritz Rau Bleistiftminenhalter
US2559884A (en) * 1947-06-18 1951-07-10 Herbert G Lehmann Eraser
US2902977A (en) * 1957-05-14 1959-09-08 John P Shurcliff Pencils

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US555690A (en) * 1896-03-03 Lead-pencil
FR347196A (fr) * 1904-10-18 1905-02-27 Eduard Dussek Porte-crayon et taille-crayon combinés
US2274311A (en) * 1941-05-05 1942-02-24 Listo Pencil Corp Mechanical pencil
US2559884A (en) * 1947-06-18 1951-07-10 Herbert G Lehmann Eraser
DE803584C (de) * 1948-10-02 1951-04-05 Fritz Rau Bleistiftminenhalter
US2516938A (en) * 1950-02-10 1950-08-01 Francis M Aimes Mechanical pencil with screw feed
US2902977A (en) * 1957-05-14 1959-09-08 John P Shurcliff Pencils

Also Published As

Publication number Publication date
FR1261713A (fr) 1961-05-19
CH353653A (fr) 1961-04-15

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