GB1017390A - Mechanical pencil - Google Patents

Mechanical pencil

Info

Publication number
GB1017390A
GB1017390A GB4836362A GB4836362A GB1017390A GB 1017390 A GB1017390 A GB 1017390A GB 4836362 A GB4836362 A GB 4836362A GB 4836362 A GB4836362 A GB 4836362A GB 1017390 A GB1017390 A GB 1017390A
Authority
GB
United Kingdom
Prior art keywords
pencil
barrel portion
pawl
lead
members
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
Application number
GB4836362A
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.)
FRANK THEODORE JOHMAN
Original Assignee
FRANK THEODORE JOHMAN
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 US654927A priority Critical patent/US3072102A/en
Application filed by FRANK THEODORE JOHMAN filed Critical FRANK THEODORE JOHMAN
Priority to GB4836362A priority patent/GB1017390A/en
Publication of GB1017390A publication Critical patent/GB1017390A/en
Expired legal-status Critical Current

Links

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
    • B43K21/10—Writing-core feeding mechanisms with the writing-cores fed by screws with separate writing-core remnants ejecting-bar

Abstract

1,017,390. Mechanical pencils. F. T. JOHMANN Dec. 21, 1962, No. 48363/62. Heading B6P. Relates to push-button and/ or tip actuated mechanical pencils in which front and rear barrel portions 11 and 10 respectively can still be rotated relative to each other to advance or retract the lead. In a tipactuated type of mechanical pencil, Fig. 10, a propelling mechanism of the helical groove type comprising members 16<SP>1</SP> and 19, rotatable relative to each other, is mounted for longitudinal, non-rotatable movement in the front barrel portion 11<SP>1</SP> of the pencil. A pawl 25 attached to member 19 cooperates with two rings of ratchet teeth or cams 27, 31 fixed to the rear barrel portion 10<SP>1</SP> of the pencil. A spring 45 biases the propelling mechanism towards the front barrel portion. Depressing the tip 16<SP>11</SP> causes the pawl 25 to ride up the cam surface 34 and upon releasing the tip, the pawl rides down cam surface 30. Relative rotation is therefore caused between members 16<SP>1</SP> and 19 of the propelling mechanism, and the lead 17 is advanced. In a modification of the above embodiment, illustrated in Fig. 13 (not shown), members 35<SP>1</SP> and 36<SP>1</SP> which are fixed within the barrel of the pencil of Fig. 10, are mounted for longitudinal, non-rotatable movement within the rear barrel portion. Depressing members 35<SP>1</SP> and 36<SP>1</SP>, push-button wise, moves cams 27 and 31 downward with respect to the propelling mechanism 19, 16<SP>1</SP>, and the pawl 25 provides the relative rotation to advance the lead. Figs. 15 to 18 (not shown) illustrate different cam arrangements, wherein the two rings of cams are attached to member 19 and the pawls are arranged on the inner surface of the rear barrel portion. In alternative embodiments, Figs. 1 to 9 (not shown), the propelling mechanism is fixed to the front barrel portion and pushbutton actuated cams provide the relative rotation to advance the lead. In the modification of Fig. 13 (not shown), notches 67 and 68 in cam members 27<SP>1</SP> and 31<SP>1</SP> engage the pawl 251, so that relative rotation of the front and rear barrel portions of the pencil causes the lead to advance or retract.
GB4836362A 1957-04-24 1962-12-21 Mechanical pencil Expired GB1017390A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US654927A US3072102A (en) 1957-04-24 1957-04-24 Mechanical pencil
GB4836362A GB1017390A (en) 1962-12-21 1962-12-21 Mechanical pencil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4836362A GB1017390A (en) 1962-12-21 1962-12-21 Mechanical pencil

Publications (1)

Publication Number Publication Date
GB1017390A true GB1017390A (en) 1966-01-19

Family

ID=10448347

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4836362A Expired GB1017390A (en) 1957-04-24 1962-12-21 Mechanical pencil

Country Status (1)

Country Link
GB (1) GB1017390A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5662424A (en) * 1994-08-29 1997-09-02 A.T. Cross Company Mechanical pencil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5662424A (en) * 1994-08-29 1997-09-02 A.T. Cross Company Mechanical pencil

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