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US2514610A - Mechanical pencil - Google Patents

Mechanical pencil Download PDF

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Publication number
US2514610A
US2514610A US674226A US67422646A US2514610A US 2514610 A US2514610 A US 2514610A US 674226 A US674226 A US 674226A US 67422646 A US67422646 A US 67422646A US 2514610 A US2514610 A US 2514610A
Authority
US
United States
Prior art keywords
jaws
lead
shell
tube
leads
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
US674226A
Other languages
English (en)
Inventor
Schweitzer Arnold
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 US2514610A publication Critical patent/US2514610A/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
    • B43K21/22—Writing-cores gripping means, e.g. chucks

Definitions

  • the present invention relates to mechanical pencil and is an improvement over a type of pencil comprising an outer shell having at one end a conical seat, a lead guiding tube carrying at one end jaws clamping the lead when in said seat, a controlled spring urging the tube inwardly and the jaws to their seat, auxiliary jaws normally urged to lead clamping position through openings in the tube, but retracted from lead clamping position by a central cam during the spring-urged back stroke of the tube.
  • the present invention has for its object a leadholder of the type cited above and which tends to avoid the inconveniences mentioned owing to the fact that a stationary clamping organ is provided in the shell, the arms of the auxiliary jaws having a portion cooperating with said stationary clamping organ in such a manner as to cause the elastic application of said auxiliary jaws on the lead engaged in said leads guiding tube when said control member is actuated against the action of said restoring spring, and so as to maintain said auxiliary jaws and said lead in a fixed position with respect to said shell while said leads guiding tube performs a portion of its back stroke, this back stroke being caused by said restoring spring when said control member is released by the operator, whereby the automatic forwarding of the lead between the clamping jaws is produced.
  • the annexed drawing shows diagrammatically and by way of example two forms of construction of the lead-holder.
  • Fig. 1 is a view of an axial section of a form of construction with some portions removed, the lead being clamped in its position of service between the clamping jaws.
  • Fig. 2 is a similar view, with the clampingr jaws in a forwarded position.
  • Fig. 3 is a similar view of a second form of construction, the lead being in a forwarded position between the clamping jaws, these latter being represented in an intermediate position taken during their back stroke.
  • the lead-holder represented on the drawing by way of example comprises after the fashion of other known lead-holders:
  • An outer shell I of general cylindrical shape, with a pointed end in which a conical seat 2 is .A prises a member sliding freely along the leads 4 Claims. (Cl. 1Z0-17) provided.
  • a leads guiding tube 3 carrying at one of its ends clamping jaws 4 emerging from this pointedv end of the shell, is subjected to the action of a restoring spring 5 tending to maintain jaws 4 applied on conical seat 2.
  • This leads guiding tube bears at its other end a leadsv magazine AI5 covered by a control member 1 emerging from the end of shell I opposite to the clamping jaws 4.
  • the lead feeding device of the invention comguiding tube 3 between two extreme positions determined by two abutments I0 and ll.
  • This sliding member is provided with twoauxiliary jaws I2 traversing the'wall of the leads guiding tube 3 through longitudinal openings I3.
  • These auxiliary jaws are borne by elastic arms 14 rigidly connected at one end to an annular portion ⁇ l5 engaged over the leads guiding tube 3.
  • Arms I4 have a shoulder I5 cooperating, when the control member 1 is actuated, with a clamping organ constituted by a shoulder I1 of shell I, and on which rests the restoring spring 5 of the leads guiding tube.
  • the portion ofthe shell I located between this shoulder I1 and the pointed end i has van axial vhole I9 of a smaller diameter than the bore 20 of the portion of the shell extending from this shoulder to the'other end.
  • Fig. 1 the elements of the lead-holder are represented in the position of rest, the lead 8 being maintained in its position of service by clamping jaws 4. These latter are applied on the lead owing to the action of the restoring spring 5 tending to jamb the jaws in conical seat 2.
  • a y f l When the user desires to cause the forwarding of the lead between the clamping jaws, it is sufli-4v cient for him to exert an axial pressure on the control member 'I against the action of the re.- storing spring 5 in order to bring -the various members of the lead-holder into the position rep- S resented in Fig. 2.
  • Control member 'I drives with it leads magazine 6 leads guiding tubev 3 and clamping jaws 4, all these parts being rigidly connected one to the other.
  • abutment II constituted by the frontal face of magazine 6 comes in contact with a rear face IB of the ring portion I5 of the sliding member and drives the latter for the latter portion of the forward stroke of the control member 1.
  • the' jaws 4 cooperate ber l.
  • a sleeve 22 with an axial hole I9 is slipped in the bottom of axial hole 20 of outer shell I.
  • the edge of this sleeve is shaped into a collar forming the shoulder Il on which rests restoring spring. 5.
  • Clamping jaws 4 are carried by a tubularholder 23, the/end .of which v ⁇ is screwthreaded.
  • the free end of the leads guiding tube 3 is also provided with a screw thread.
  • a screw threaded nipple 24 holds together holder 23 and leads guiding tube 3.

Landscapes

  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
US674226A 1946-03-13 1946-06-04 Mechanical pencil Expired - Lifetime US2514610A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH2514610X 1946-03-13

Publications (1)

Publication Number Publication Date
US2514610A true US2514610A (en) 1950-07-11

Family

ID=4569776

Family Applications (1)

Application Number Title Priority Date Filing Date
US674226A Expired - Lifetime US2514610A (en) 1946-03-13 1946-06-04 Mechanical pencil

Country Status (3)

Country Link
US (1) US2514610A (fr)
BE (1) BE470020A (fr)
CH (1) CH250920A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2800109A (en) * 1953-01-19 1957-07-23 Caran D Ache Crayons Mechanical pencil
US2868170A (en) * 1953-10-14 1959-01-13 Paper Mate Mfg Co Retractable mechanism of pinch yoke type
US20210187994A1 (en) * 2019-12-23 2021-06-24 Kotobuki & Co., Ltd. Mechanical pencil

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE972637C (de) * 1953-10-23 1959-08-27 Faber Castell A W Druckfuellstift

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1803794A (en) * 1924-05-08 1931-05-05 Pencil Mechanism Corp Mechanical pencil
US2078433A (en) * 1935-12-18 1937-04-27 Winter Arthur Lead feeding pencil
CH219430A (de) * 1940-04-05 1942-02-15 Osmia Fuellhalter Fabrik G M B Druckfüllbleistift.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1803794A (en) * 1924-05-08 1931-05-05 Pencil Mechanism Corp Mechanical pencil
US2078433A (en) * 1935-12-18 1937-04-27 Winter Arthur Lead feeding pencil
CH219430A (de) * 1940-04-05 1942-02-15 Osmia Fuellhalter Fabrik G M B Druckfüllbleistift.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2800109A (en) * 1953-01-19 1957-07-23 Caran D Ache Crayons Mechanical pencil
US2868170A (en) * 1953-10-14 1959-01-13 Paper Mate Mfg Co Retractable mechanism of pinch yoke type
US20210187994A1 (en) * 2019-12-23 2021-06-24 Kotobuki & Co., Ltd. Mechanical pencil
US11090969B2 (en) * 2019-12-23 2021-08-17 Kotobuki & Co., Ltd. Mechanical pencil

Also Published As

Publication number Publication date
CH250920A (fr) 1947-09-30
BE470020A (fr)

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