GB915522A - Retractable point protector for writing instruments - Google Patents

Retractable point protector for writing instruments

Info

Publication number
GB915522A
GB915522A GB4354459A GB4354459A GB915522A GB 915522 A GB915522 A GB 915522A GB 4354459 A GB4354459 A GB 4354459A GB 4354459 A GB4354459 A GB 4354459A GB 915522 A GB915522 A GB 915522A
Authority
GB
United Kingdom
Prior art keywords
point
sleeve
writing
ears
barrel
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
GB4354459A
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.)
Individual
Original Assignee
Individual
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 claimed from US738084A external-priority patent/US2905147A/en
Application filed by Individual filed Critical Individual
Publication of GB915522A publication Critical patent/GB915522A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K24/00Mechanisms for selecting, projecting, retracting or locking writing units
    • B43K24/02Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions

Landscapes

  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)

Abstract

915,522. Writing instruments. JOHMANN, F. T. Dec. 22, 1959 [Jan. 21, 1959], No. 43544/59. Class 146 (3). A writing instrument having a resilientlymounted writing point, has a point protector movable in relation to the barrel between positions in which it respectively shields and exposes the point, the point protector being actuated by pressing its outer end, which is adjacent to the writing point, and the writing point against a rigid surface. A shown, the instrument comprises a two-part barrel 10, 11, whose parts are connected by a threaded, tubular plug 12. Slidably mounted in the open front end of the barrel part 11 is a sleeve 21 having series of ears 23 extending radially therefrom in the space between two tubular latch members 16, 17 which are frictionally secured in the barrel. The members 16, 17 are formed with opposed cam surfaces of the shapes shown in Fig. 6. The writing unit includes a reservoir 25, a feed tube 27 which is slidable in the plug 12 and the sleeve 21, and a ball-point 28. A spring 29 biases the writing unit forwards. The sleeve 21 is biased forwards by a spring 30 which is weaker than the spring 29 and tends to hold the ears 23 in contact with the latch member 16. In Fig. 1, the ears 23 are shown in the position 1 of Fig. 6, i.e. in the bottom of deep recesses 18 in the member 16, so that the sleeve 21 encloses the ball-point 28. To expose the ball-point the user presses the writing end of the pen against a rigid surface, thus forcing the sleeve 21 and the writing unit back into the barrel against the bias of their respective springs and bringing the ears 23 into contact with the member 17 (positions 2, 3, Fig. 6). When the pen is raised from the surface the sleeve and unit are carried forwards by their springs and the ears 23 pass through position 4 to position 5 so that the front end of the sleeve 21 is spaced to the rear of the ball-point 28. The point is concealed by a repetition of this procedure, the ears 23 passing through positions 6, 7, 8, 9 to 1<SP>1</SP>. In a modification, the ears 23 may be mounted, on the barrel and the members 16, 17 on the sleeve 21. Specification 792,185 is referred to.
GB4354459A 1958-05-27 1959-12-22 Retractable point protector for writing instruments Expired GB915522A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US738084A US2905147A (en) 1958-05-27 1958-05-27 Protraction-retraction mechanism for writing instruments
US78809859A 1959-01-21 1959-01-21

Publications (1)

Publication Number Publication Date
GB915522A true GB915522A (en) 1963-01-16

Family

ID=31981679

Family Applications (3)

Application Number Title Priority Date Filing Date
GB3105858A Expired GB854118A (en) 1958-05-27 1958-09-29 Protraction-retraction mechanism for writing instruments
GB1658159A Expired GB900299A (en) 1958-05-27 1959-05-14 Projection-retraction mechanism for writing instruments
GB4354459A Expired GB915522A (en) 1958-05-27 1959-12-22 Retractable point protector for writing instruments

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB3105858A Expired GB854118A (en) 1958-05-27 1958-09-29 Protraction-retraction mechanism for writing instruments
GB1658159A Expired GB900299A (en) 1958-05-27 1959-05-14 Projection-retraction mechanism for writing instruments

Country Status (3)

Country Link
CH (1) CH363906A (en)
FR (1) FR1236208A (en)
GB (3) GB854118A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3223072A (en) * 1963-07-23 1965-12-14 Frank T Johmann Switching device
US4319106A (en) * 1980-03-31 1982-03-09 Armitage Ralph T Push button switch
US5043546A (en) * 1990-07-16 1991-08-27 Oslo Controls, Incorporated Push-button switch

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1248508B (en) * 1962-08-16 1967-08-24 Helmut Bross Dipl Ing Switching mechanism for ballpoint pen
DE1248510B (en) * 1964-12-19 1967-08-24 Helmut Bross Dipl Ing Ballpoint pen with a push mechanism for either pushing forward or lowering the mine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3223072A (en) * 1963-07-23 1965-12-14 Frank T Johmann Switching device
US4319106A (en) * 1980-03-31 1982-03-09 Armitage Ralph T Push button switch
US5043546A (en) * 1990-07-16 1991-08-27 Oslo Controls, Incorporated Push-button switch

Also Published As

Publication number Publication date
GB854118A (en) 1960-11-16
GB900299A (en) 1962-07-04
CH363906A (en) 1962-08-15
FR1236208A (en) 1960-07-15

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