US2930354A - Alternate push rocking latch mechanism for retractable ball pen - Google Patents

Alternate push rocking latch mechanism for retractable ball pen Download PDF

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Publication number
US2930354A
US2930354A US631771A US63177156A US2930354A US 2930354 A US2930354 A US 2930354A US 631771 A US631771 A US 631771A US 63177156 A US63177156 A US 63177156A US 2930354 A US2930354 A US 2930354A
Authority
US
United States
Prior art keywords
latch
barrel
latch member
plunger
writing
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
US631771A
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English (en)
Inventor
John C Lockwood
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.)
Scripto Inc
Original Assignee
Scripto Inc
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 NL217312D priority Critical patent/NL217312A/xx
Priority to NL91907D priority patent/NL91907C/xx
Priority to BE560292D priority patent/BE560292A/xx
Priority to US631771A priority patent/US2930354A/en
Application filed by Scripto Inc filed Critical Scripto Inc
Priority to GB12728/57A priority patent/GB804903A/en
Priority to DES53221A priority patent/DE1075983B/de
Priority to ES0235207A priority patent/ES235207A1/es
Priority to CH329762D priority patent/CH329762A/de
Priority to FR738979A priority patent/FR1253810A/fr
Application granted granted Critical
Publication of US2930354A publication Critical patent/US2930354A/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
    • B43K24/00—Mechanisms for selecting, projecting, retracting or locking writing units
    • B43K24/02—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions
    • B43K24/08—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions operated by push-buttons
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G7/00—Manually-actuated control mechanisms provided with one single controlling member co-operating with one single controlled member; Details thereof
    • G05G7/02—Manually-actuated control mechanisms provided with one single controlling member co-operating with one single controlled member; Details thereof characterised by special provisions for conveying or converting motion, or for acting at a distance
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G2700/00—Control mechanisms or elements therefor applying a mechanical movement
    • G05G2700/12—Control mechanisms with one controlling member and one controlled member
    • G05G2700/18—Systems wherein the control element may be placed in two or more positions

Definitions

  • This invention relates to ball point writing instruments and more particularly to an improved latch mechanism for such writing instruments in which a writing unit is arranged for projection and retraction alternately upon successive depression of a plunger member.
  • the latch mechanism of the present invention is characterized by a iloating latch member adapted for disposition within a pen barrel at the rear end of a writing unit retractably housed therein and forwardly of a depressible plunger member, and shaped for sliding longitudinally in the barrel upon depression of the plunger member into contact therewith as well'tas for selective, transverse, fulcrumed rocking in opposite directions in the barrel as a result of such contact; the -'oating latch member and the depressible plunger member having the adjacent ends thereof formed for ContactY in alternate relations so that each successive depression of the plunger member causes rocking of the latch member in the direction opposite to that of the preceding depression and thereby operates to project land retract the writving unit alternately.
  • Fig. 7 is a partial, longitudinal cross section showing' the operating mechanism in the position it occupies when the writing unit is being retracted as the latch member en; gages the rear latch shoulder to position the latch member for a new operating cycle.
  • the writing instrument 10 comprises a two-part barrel housingy formed by a forward barrel portion v12 anda rear barrel portion 14.
  • a writing-unit or ball point and reservoir unit'16 is slidably arranged within the forward barrel portion 12 for projection forwardly to a writing position through an opening in the tapered Writing tip of the forward barrel portion 12 and is continuo-usly biased rearwardly for retraction therein by a barrel springilS seated forwardly on an inwardly stepped inclined annular shoulder 20 formed in forward barrel portion 12.
  • the other extremity of barrel spring 18 bears against shoulder 22 formed exteriorly on the ball point and reservoii unit 16.
  • the forward barrel portion 12 is reduced in diameter and threaded'adjacent itsrear end as at 24 for assembly with rear barrelportion 14 fitted for this purpose with an internally threaded assembly sleeve 26; assembly sleeve 2,6 having an opening therethrough forallowing the ball point and reservoir unit 16 to extend into rear barrel portion 14.
  • a cartridgeV plug 28 is fitted within the rear end fof yball point and reservoir unit 16 and has a central longitudinal aperture 29 extending therethrough andV exterior grooves 30 spacedron the outer surface of cartridge plug 28.”V A
  • cap coverV 32 is tted overthecar'tridge plug 28 and allows venting to the atmosphere through grooves Silthat extend necessary in regard to such factors as strength and ease of manufacture.
  • the floating nature ofthe latchmember eliminates any highly critical tolerances in shaping it to the related structure with which it must operate, and further eliminates the difficulty of vany articulated assembly about ⁇ a pivot axis or the like.
  • prior attempts to provide a rocking latch means have always introduced arrangements that required the latch to be a captive of or attached to other parts of. the operating mechanism.
  • the floating latch member of the present invention makes it possible to provide an exceptionally effective alternate push latch mechanism having consistent and serviceable operating characteristics and arranged so thatv it is particularly easy to assemble.
  • Fig l is a central, longitudinal cross section of the writing instrument according to the present embodiment of the invention.
  • the operating mechanism ofthe present invention is contained within housing 36 which is divided longitudif f nally into two sections 38, 4l) as shown in Fig. 2.
  • An adapter cup 50 is arranged'oiver the rear end of the ball point and reservoir unit 16 and is disposed within housing sections 38, 4); a cup shoulder 52 being arranged interiorly of sections 38,40 for limiting the forward movement of adapter cup 50.
  • a latch member 54 contacts the rear kendY of ⁇ the adapter cup 50 and is limited in its forward movement by the adapter cup 5l) abutting cup shoulder 52, thereby restricting the forward movement of latch member ⁇ r Latch member 54 is unattached to any of the parts 'of the Writing instrument and is a freely floating ltnemlier being free to move longitudinally andwto ⁇ rock transversal? to'shift the ball point and reservoir unit 16 between retracted and projected positions.
  • the rear end of ⁇ latch member 54 is formed witha pair of oppositely arranged, inclined, outwardly facing cam surfaces 56, 58 that .converge at a point substantially on ⁇ the longitudinal axis of latch membertSi.
  • Latch member'54 is furtherformed adjacent its forward end with two oppositely arranged llaterally extending latch arms 60, 62; the configuration of latch member 54 being substantially symmetrical ywith a T-shaped or arrow head appearance.
  • ITl ⁇ he latch member 54 is rockably ⁇ cammed into and out of latching Arelation with forward latch shoulder 44 about latch rockers 67, 68 respectively,thatare disposed 'slightly rearward of the midpoint ofthe longitudinal xis'of latch member 54.
  • the maximum trans'versedi- Vrnension of 'latch member S4 is between the laterally Aextending latch arms 60, 62 and this .dimension Visso designed to be less than the transverseinterior dimension "of the .mechanism housing 36 between forward latch 'shoulder 44 and rear latch shoulder 46.
  • springstud 76 isarranged on the rear'edge of the aper- 4turef72'andthe'rear end of spring 74 isarranged around :.”
  • Stud', Aplunger retaining stud 78 is formed Yonthe 'housing Ysection 38and limits the forward and rearward movements of plunger member 70.
  • the forward end of ⁇ plunger member 70 is formed with oppositely arranged inclined strike faces 80, 82 that converge at a point substantially on the longitudinal axis of plunger member70 ⁇ andthe longitudinal axis of the barrel.
  • lA rearwardly facing plunger spring shoulder 84 is arranged within vmechanism housing sections'38, '40 providing a seat for the plunger spring 74.
  • mechanism housing 36 receives ⁇ the rear portion of assembly sleeve 26 and is V'secured-'thereto by an outwardly Adisposed Abarb 86 on assembly sleeve 26.
  • a lock sleeve 88 is tted 'over the downward-stepped rear portion of mechanism housing "3.6and ⁇ secures the rear ⁇ ends of mechanism housing sec- ⁇ tions 4'38, 40 together.
  • a clip ⁇ member 90 is vfixed, on 'rear barrel portion 14 by ears 92 extending Athrough'slots '93 in the rear barrel portion 14, and lock sleeve 88 has -slot 94therein that abuts the clip member ears 92.
  • a trim -ring 96 having a clearance aperture therethrough to receive plunger member 70 for slidingmovement therein is arranged about the end of the rear barrel portion 14; the clearance aperture being alignedV withthe rearportion'fof lock sleeve 88 and being of a ⁇ similar 4coniguration.
  • plunger member 70 Upon the release of plunger member 70 from the latched Vposition shown in Figure 4, the rearward force exerted by barrel-spring 18 is transmitted totheforward canted bearing surface of latch member 54 and rocks latch member 54 about latch arm 60 until latch rocker 68 contacts the inner wall. of insert 42 within the mechanism housing 36 as shown in v Figure 5; plunger member 70 returning to its extended position after each depression under the .bias-of plunger spring 74. It is understood that plunger spring 74 is not a necessary element for satisfactory operation but is used to return the plunger 70 in each instance to its extended position. The latch member cam surface 58 is thus exposed for contact with the plunger strike face l82 upon the next succeeding depression of plunger -member 70.
  • plunger member 70 is depressed and strike face 82 contacts latch member cam surface 58 as illustrated in' Figure 6 and the camming action therefrom results in a rocking of latch member 54 about rocker 68 in a clockwise Adirection and the unlatching o'f rocken arm 60 from engagement with forward 'flatch shoulder 44.
  • 'i'he'latch member 54 is rocked untilrocker arm'62 contacts the opposite interior side of mechanism housing, 36 from rocker arm 60; (latch member54 then moving'rearwardlyiun'der Lthe action of 'barrel spring '1'8 until latch arm 62 contacts rear latch shoulder 46 ⁇ 'as shown in "Figure 7.
  • plunger strike faces 80, 82 alter. nately engage alternate latch cam surfaces 56, 58 upon successive ⁇ depressions of the Vplunger member 70 as.' a resultof the rocking o'f the latchmember S4 about latch arms 60, 62 Aafter the plunger member 70 is releasedfrom Ycontact with latch member 54.
  • a ball point writing instrument havingfa barrel, a writing unit slidably arranged within said barrel for retracted and ⁇ projected positioning with respect thereto, and rmeans'continuously biasing said writing unit rearwardly within said barrel toward retracted positionythe improvement comprising a rockable latch member 'arranged in fulcrumed relation with respect to the -rear -en'dl-of 'said writing Yunit and within ⁇ said barrel Yand floating freely thereat to move longitudinally and to rock transversely ⁇ in opposite directions, but -onlyein a singleplane, -incident to shifting of 'said unit tbe tween retracted and projected positions, the forward end of said latch member having oppositely ⁇ extending latching arms formed thereat, and the rear end ofrsaid latchy member having a pair of oppositely arranged, rearwardly facing surfaces that converge at a point substantiallyonf-'thelongitudinal ⁇ axis of said latch member, means-farrangedinteri
  • a ball point writing instrument having a barrel, a writing unit slidably arranged within said barrel for retracted and projected positioning with respect thereto,- and means continuously biasing said writing unit rearwardly within said barrel toward retracted position; the improvement comprising a rockable latch member having latch rocker portions at the sides thereof arranged in sidewise fulcrumed relation with respect to the inner wall of said barrel for rocking thereon and floating freely at the rear end of said writing unit to slide longitudinally and rock transversely in opposite directions within said barrel incident to shifting of said unit between retracted and projected positions, the forward end of said latch member having oppositely extending latching arms formed thereat, and the rear end of said latch member having a pair of oppositely arranged, rearwardly facing surfaces that converge at a point substantially on the longitudinal axis of said latch member, means arranged interiorly of said barrel for successive engagement by said latch member arms to latch said writing unit respectively at said projected and retracted positions against the force of said biasing means, said engaging means being laterally offset with respect to said latch member
  • a writing instrument comprising. a barrel, a writing y unit slidably housed within said barrel for shifting between projected and retracted positions with respect thereto, means within said barrel biasing said writing unit toward retracted position, a rockable latch member slidably oating in sidewise fulcrumed relation within said barrel at the rear end of said writing unit to slide longitudinally and rock transversely in opposite directions Within said barrel, said latch member being unattached to said writing unit or to said barrel and having latch rocker portions at the sides thereof for rocking against the inner barrel wall, means arranged interiorly of said barrel for successive engagement by said latch member to latch said writing unit respectively at said projected and retracted positions against the force of said biasing means, said means being laterally offset with respect to said latch member for engagement upon rocking of said latch member, and a depressible plunger member Aslidably carried at the rear end of said barrelV for depression into operating contact with said latch member, theoperating contact of said plunger member being suchlas to apply an actuating force for rocking said sidewise
  • a writing instrument comprising a barrel, a writing unit housed within said barrel and arranged for shifting between projected and retracted positions therein, and means disposed within said barrel biasing said writing unit rearwardly toward retracted position, a depressible plunger slidably carried in the rear end of said barrel, aV latch member floating freely for relative transverse movement at the rear end of said writing unit and having latch rocker portions at the sides thereof disposed in a sidewise fulcrumed relation within said barrel for rocking against the inner wall thereof forwardly of Vsaid plunger, said latch member being engageable by said plunger to slide longitudinally and to rock transversely in one direction within said barrel about one of said latch rocker portions upon engagement of a given contact surface on said plunger with a given paired contact surface on said latch member and to rock in the opposite direction about the other of said latch rocker portions upon engagement of a second contact surface on said plunger with a corresponding paired latch member contact surface, incident to shifting of said writing unit between retracted and projected positions by said plunger
  • a writing instrument having a barrel, a writing unit slidably arranged for alternate retraction and projection with respect thereto, and means continuously biasing said writing unit rearwardly within said barrel towards retracted position;
  • the improvement comprising a rockable latch member floating freely at the rear of said writing unit having latch rocker portions at the sides thereof and arranged in sidewise fulcrumed relation with ⁇ -in said barrel to rock transversely in opposite directions against the inner barrel wall and to slide longitudinali;l within the barrel incident to shifting of said unit between retracted and projected positions, the forward' end of said latch member having oppositely extending latching portions formed thereat, and the rear end of said latch member having rearwardly facing surface areas that conn verge at a point substantially on the longitudinal axis of said latch member, means arranged interiorly of said barrel for successive engagement by said latch member to latch said writing unit respectively at said retracted and projected positions against the force of said biasing means, said barrel means beingy laterally offset with respect to said latch member for engagement by said extending latching portions upon

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Pens And Brushes (AREA)
US631771A 1956-12-31 1956-12-31 Alternate push rocking latch mechanism for retractable ball pen Expired - Lifetime US2930354A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
NL217312D NL217312A (en(2012)) 1956-12-31
NL91907D NL91907C (en(2012)) 1956-12-31
BE560292D BE560292A (en(2012)) 1956-12-31
US631771A US2930354A (en) 1956-12-31 1956-12-31 Alternate push rocking latch mechanism for retractable ball pen
GB12728/57A GB804903A (en) 1956-12-31 1957-04-18 Improvements relating to writing instruments
DES53221A DE1075983B (de) 1956-12-31 1957-04-20 Schreibgeraet
ES0235207A ES235207A1 (es) 1956-12-31 1957-05-03 Mecanismo de gatillo oscilante por impulsos anternos para instrumentos escritores retractiles
CH329762D CH329762A (de) 1956-12-31 1957-05-10 Schreibgerät
FR738979A FR1253810A (fr) 1956-12-31 1957-05-20 Mécanisme de verrou pour instrument d'écriture à pointe à bille rétractable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US631771A US2930354A (en) 1956-12-31 1956-12-31 Alternate push rocking latch mechanism for retractable ball pen

Publications (1)

Publication Number Publication Date
US2930354A true US2930354A (en) 1960-03-29

Family

ID=24532671

Family Applications (1)

Application Number Title Priority Date Filing Date
US631771A Expired - Lifetime US2930354A (en) 1956-12-31 1956-12-31 Alternate push rocking latch mechanism for retractable ball pen

Country Status (7)

Country Link
US (1) US2930354A (en(2012))
BE (1) BE560292A (en(2012))
CH (1) CH329762A (en(2012))
DE (1) DE1075983B (en(2012))
ES (1) ES235207A1 (en(2012))
GB (1) GB804903A (en(2012))
NL (2) NL91907C (en(2012))

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3007444A (en) * 1958-06-03 1961-11-07 Scripto Inc Latch mechanism assembly for retractable ball pen
US3062191A (en) * 1959-08-07 1962-11-06 Scripto Inc Latch mechanism for retractable ball pens adaptable for automatic assembly
US3144005A (en) * 1960-04-14 1964-08-11 Frank T Johmann Retraction-protraction mechanism for writing instruments
WO2005077673A1 (es) * 2004-02-13 2005-08-25 Inoxcrom, S.A. Útil de escritura
USD626596S1 (en) * 2009-12-31 2010-11-02 Holland Usa, Inc. Push button and clip for a writing instrument
WO2018124876A2 (en) 2016-12-30 2018-07-05 Csi Industries B.V. Gripper apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2930355A (en) * 1957-07-30 1960-03-29 Scripto Inc Ball point pen
DE3069589D1 (en) * 1979-07-02 1984-12-13 Platignum Plc A retractable mechanism for a writing element

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE53926C (de) * W. G. DINKELMEYER in Nürnberg Bleistifthalter
FR840819A (fr) * 1938-05-04 1939-05-04 Vendita Penna Bicolore Itala C Stylographe à deux plumes
US2584569A (en) * 1945-11-17 1952-02-05 Parker Pen Co Ball point writing instrument
US2863421A (en) * 1955-02-28 1958-12-09 Ferber Corp Writing instrument
US2865331A (en) * 1953-08-17 1958-12-23 Paper Mate Of Puerto Rico Inc Cam type retractable mechanisms

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB727049A (en) * 1952-05-29 1955-03-30 Gabriel Thomas Whyte Improvements in or relating to ball-point pens and other writing instruments
FR1127686A (fr) * 1955-07-15 1956-12-21 Christian Ets Stylographe à embout rétractable à système automatique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE53926C (de) * W. G. DINKELMEYER in Nürnberg Bleistifthalter
FR840819A (fr) * 1938-05-04 1939-05-04 Vendita Penna Bicolore Itala C Stylographe à deux plumes
US2584569A (en) * 1945-11-17 1952-02-05 Parker Pen Co Ball point writing instrument
US2865331A (en) * 1953-08-17 1958-12-23 Paper Mate Of Puerto Rico Inc Cam type retractable mechanisms
US2863421A (en) * 1955-02-28 1958-12-09 Ferber Corp Writing instrument

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3007444A (en) * 1958-06-03 1961-11-07 Scripto Inc Latch mechanism assembly for retractable ball pen
US3062191A (en) * 1959-08-07 1962-11-06 Scripto Inc Latch mechanism for retractable ball pens adaptable for automatic assembly
US3144005A (en) * 1960-04-14 1964-08-11 Frank T Johmann Retraction-protraction mechanism for writing instruments
WO2005077673A1 (es) * 2004-02-13 2005-08-25 Inoxcrom, S.A. Útil de escritura
USD626596S1 (en) * 2009-12-31 2010-11-02 Holland Usa, Inc. Push button and clip for a writing instrument
WO2018124876A2 (en) 2016-12-30 2018-07-05 Csi Industries B.V. Gripper apparatus
US11142410B2 (en) 2016-12-30 2021-10-12 Csi Industries B.V. Gripper apparatus

Also Published As

Publication number Publication date
CH329762A (de) 1958-05-15
ES235207A1 (es) 1957-11-16
NL91907C (en(2012))
BE560292A (en(2012))
GB804903A (en) 1958-11-26
DE1075983B (de) 1960-02-18
NL217312A (en(2012))

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