US3120837A - Writing instruments having a retractable writing point - Google Patents

Writing instruments having a retractable writing point Download PDF

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Publication number
US3120837A
US3120837A US427801A US42780154A US3120837A US 3120837 A US3120837 A US 3120837A US 427801 A US427801 A US 427801A US 42780154 A US42780154 A US 42780154A US 3120837 A US3120837 A US 3120837A
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US
United States
Prior art keywords
teeth
writing
barrel
rotatable
push member
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
US427801A
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English (en)
Inventor
Johnson William Frederick
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.)
Mentmore Manufacturing Co Ltd
Original Assignee
Mentmore Manufacturing Co Ltd
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 Mentmore Manufacturing Co Ltd filed Critical Mentmore Manufacturing Co Ltd
Application granted granted Critical
Publication of US3120837A publication Critical patent/US3120837A/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
    • B43K23/00—Holders or connectors for writing implements; Means for protecting the writing-points
    • B43K23/016—Holders for crayons or chalks
    • 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
    • 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
    • B43K24/084—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 with saw-like or analogous cams

Definitions

  • This invention relates to writing instruments having a etractable writing point.
  • Instruments of this character comprise a tubular casing housing a cartridge carrying the writing point, generally a rotatable ball, and mechanism at the end of the casing remote from the point including a pressbutton or stud which, when pressed, inwardly'of the casing, causes either the projection of the writing point through an aperture in the opposite end of the casing or ti e retraction of the point to a position within the casing, dependent upon whether the point was initially housed within the casing or projected externally thereof, respectively.
  • a writing instrument having a retractable writing point comprises a tubular casing or barrel adapted to contain a pen unit or cartridge carrying the writing point at one end, a spring located within the casing and adapted to urge the cartridge axially thereof from one position in which the point is protracted, i.e.
  • FIGURE 1 is an end elevation of an operating or push member
  • FIGURE 2 is a side elevation of the operating member shown in FIGURE 1;
  • dGURE 3 is an end elevation of an annular member or cam
  • FIGURE 4 is a side elevation of the annular member shown in FIGURE 3;
  • FIGURE 5 is a section taken on the line V-V of FIGURE 3
  • FIGURE 6 is a an end elevation of a rotatable member or spider element
  • FIGURE 7 is a side elevation of the spider element shown in FIGURE 6;
  • FIGURE 8 is a side elevation of a spring
  • FIGURE 9 is a schematic view showing the relative positions of the operative parts of i the operating member, annular member and spider element when the wri ing point of the instrument is exposed for Writing purposes and just prior to the operation of the mechanism for retracting the writing point;
  • FIGURE 10 is a view similar to FIGURE 9 showing the operative parts at an intermediate stage, during the operation for retracting the writing point;
  • FIGURE 11 is a view similar to FIGURES 9 and 10 showing the realtive positions of the operative parts when the writing'point is retracted;
  • FIGURE 12 is a longitudinal section of the writing instrument with the writing point exposed for writing purposes
  • he writing instrument illustrated is of the kind employing a pen unit comprising a tubular cartridge 1 (FIG- URES l2, l3 and 14-) containing a relatively viscous ink and fitted at one end with a nose-piece 2 carrying at its point a writing ball 3 to which the ink is conducted by way of a small-bore passage 4 formed in the nose-piece 2.
  • a pen unit comprising a tubular cartridge 1 (FIG- URES l2, l3 and 14-) containing a relatively viscous ink and fitted at one end with a nose-piece 2 carrying at its point a writing ball 3 to which the ink is conducted by way of a small-bore passage 4 formed in the nose-piece 2.
  • annular abutment 5 At a suitable location on the cartridge 1, generally near the writing point, there is formed an annular abutment 5 to cooperate with one end of a helical compression spring 6 which encircles the nose-piece 2 and bears at its other end upon an internal annular abutment 7 formed in a tubular casing or barrel part 8 adjacent to an opening 9 through which the point of the nose-piece 2 may pass with but little play.
  • the arrangement is such that when the cartridge 1 is controlled by suitable mechanism, to be described below, it may be displaced axially from an o erative position in which the writing ball point protrudes through the opening 9 in the casing part 8 to a suflicient degree to enable it to be employed for writing purposes, to another position in which the writing ball point is retracted within the casing part is.
  • the displacement of the writing point to the operative position is effected against the action of the compression spring 6 and the retraction of the point is effected under the action of the pressure of the spring 6.
  • the casing part 8 is of shorter axial length than the cartridge It so that the latter may be readily placed in position in the casing part 8 or removed therefrom when desired.
  • a further casing part 1% is arranged to be connected to the first such part, as by means of a screwthreaded neck 11 and carries the mechanism for actuating the cartridge.
  • This second casing part itl consists of a metal shell or sl eve of substantially cylindrical shape but having the end 12 remote from the screw-threaded neck connection 11 tapered inwards.
  • the connection 11 is formed on a tubular plug 13 of suitable material, for example, a synthetic resin or plastic, which is a tight fit in the mouth of the metal sleeve 10.
  • the passage 14 through this plug is of such a diameter that it will permit the free passage of the upper end of the cartridge 1.
  • the upper end oithe cartridge 1 extends beyond the inner end of the plug 13 and is engaged by a rotatable member constituted by a spider element indicated gener ally at 15 consisting of a hollow cylinder closed at one end and formed at that end with'a coaxial coned seating 16 and provided externally with three radial lugs or projections i7 set at to each other.
  • a lug or projection 17 may also be called a lug element, there being three lug elements in the illustrated embodiment.
  • the end of the cartridge is fittedwith a cap 13 having a coned end having an inclined angle less than that of the seating 1 5 so that it may pivot slightly on the seating.
  • the body of the spider I15 is adapted to be received slidably wtihin an axial bore 21 formed in an operating or push member 22,.
  • This member 22 has a substantially cylindrical external surface at its inner end and is tapered off towardsits outer end to terminate in a substantially cylindrical stud 23 adapted to project through an aperture 24 formed in the tapered end 12 of the metal sleeve it
  • a helical compression spring 2-5 which bears at one end on the end wall 21a of the bore 21 and at its other end on the spider so that the latter is normally urged into engagement with the coned end cap 18 on the cartridge 1.
  • the operating member 22 is disposed within an annular element 26 which is a tight fit in the upper end portion of the metal sleeve 10 and has its internal surface formed at the inner end to a cylindrical shape adapted to receive the cylindrical portion of the operating member 22 as a relatively close fit.
  • the bore 27 through the annular member 26 is tapered as at 28 at the same angle as the corresponding portion of the operating member 22 so that, in the normal position of the parts, the operating member 22 (under the action of the lighter spring 25) will fit snugly into the tapered bore with its stud portion 23 projecting sufficiently through the end 12 of the metal sleeve 10 to enable it to be engaged and operated by a finger of the user of the writing instrument.
  • the projections 17 on the spider 15 are of such a length that a short portion of each of their outer ends would normally rest on the inner end face of the annular member 26.
  • This end face is formed with an even number, for example six, of ratchet-like teeth 29, each having one flank 30 contained in a plane also containing the axis of the member and its other flank 31 inclined relatively steeply.
  • Three longitudinally-extending grooves 32 are formed in the inner surface of the annular member 26, equi-angularly spaced around the axis thereof, so that each groove 32 registers with the lower end or" the inclined flank 31 of one of the teeth 29.
  • grooves 32 are of such a depth that the spider 15 may slide into the annular member 26 when its projections 17 are in line with the grooves 32 and it will be appreciated that these grooves 32 extend from the lower ends of the inclined flanks 31 of alternate teeth 29, i.e. those ends nearer the upper end of the member 26.
  • the operating member 22, while being slidable in the annular member 26, is prevented from rotating relative thereto by forming the operating member 22 over its cylindrical end with one or more longitudinally-extending ribs 33 each adapted to engage in a corresponding groove or channel in the annular member 26.
  • the grooves 32 in the annular member are conveniently used for this purpose.
  • the inner end face of the operating member 22 is formed with teeth 35 which are the same in number and of the same character as those teeth 2% formed on the end of the annular member 26, but are so disposed that they are displaced through half a tooth pitch in relation to those teeth 29 around the common am's of the two members.
  • the projections 17 on the spider 15 will be engaged by the inclined faces 36 of teeth 35 on the operating member 22 when this member is displaced inwardly to a suflicient extent.
  • the projections may now continue their sliding motion down the inclined flanks 31, until they meet the axial flanks 37 of the adjacent teeth 35 on the operating member 22, the spider 15 rotating slightly about its axis meanwhile.
  • the pressure of the main spring 6 tends to return the cartridge 1 to the retracted position but the spider 15 is prevented from moving so long as the crests of the teeth 35 on the operating member 22 project above the inclined flanks 31 of the teeth 29 on the annular member 26.
  • the operating member 22 is urged away from the cartridge 1 by the lighter spring 25 to bring these crests below the inclined flanks 31 of the teeth 29 on the annular member 26, whereupon the ends of the projections 17 on the spider 15 slide to the bottom ends of these inclined flanks 31 where their further progress is arrested by contact with the axial flanks 30 of the adjacent teeth 29, Further inward motion of the cartridge 1 and spider 15 is therefore prevented, the dimensions of the parts being such that the writing point is then still projecting through opening 9 of the casing part 8 to a suflicient extent to enable it to be used satisfactorily for writing purposes. Under the action or" the lighter spring 25 the operating member 22 has, by then, returned to its normal position in which its stud end 23 projects to the full extent through the aperture 24 in the end 12 of the metal sleeve 10.
  • cam teeth 29 of another character i.e. those having an inclined flank succeeded by a stop surface, with cam teeth 29 of another character, i.e. those having an inclined flank leading into a groove or channel 32, and with these grooves or channels themselves so that a tooth 29 of the one character plus a tooth 2% of the other character plus a groove or channel 32 may be considered to constitute a cam element, the embodiment illustrated comprising a plurality of such cam elements.
  • the mechanism described is particularly simple and reliable in operation and it will be understood that when the upper casing part 3 is removed for the purpose of changing a cartridge, complete disengagement of the spider 15 from the operating member 22, under the action of the lighter spring 25, is prevented due to the engagement of its projections 17 with the adjacent end face of the tubular plug 13 fitted in the outer end of the metal sleeve it
  • the number of teeth formed on the operating member 22 and the annular member 26 may be any even number suitably selected in accordance with the diameter of the unit to be constructed, the number of projections 17 and grooves 32 being one half the selected number of teeth.
  • a writing instrument comprising a barrel open at its opposite ends, a pen unit slidably mounted in said barrel and having a writing point at its forward end adapted to be protracted and retracted through the forward end of the barrel, spring means constantly urging said unit toward a retracted position wherein the writing point is concealed within the barrel, a push member having a portion projecting through the rear end of said barrel and slidably mounted in non-rotatable fashion with respect thereto, said push member being provided with downwardly directed teeth, a rotatable member interposed between said spring means and the teeth of said push member whereby said spring means forces the rotatable member against the teeth of said push member, at least one of the engaging surfaces or" the teeth of the push member and the rotatable member being inclined so that the force of engagement between the teeth of said pusl member and the engaging surface of the rotatable member caused by said spring rotatably biases said rotatable member, said rotatable member and the interior of said barrel being formed with coacting members comprising at
  • a writing instrument comprising a barrel, a pin unit slidably mounted in said barrel for movement along the longitudinal axis thereof and having a writing point at its forward end adapted to be protracted and retracted through the forward end of the barrel, a push member slidably and non-rotatably mounted in said barrel.
  • a rotatable member mounted in said barrel for movement along said axis between a first axial position and a second axial position and for rotation through at least 360 about said axis, the axial position of the writing point being determined by the axial position of the rotatable member, said writing point being in the protracted position when said rotatable member is in one of said positions and in the retracted position when said rotatable member is in the other of said positions, spring means urging said rotatable member toward the push member, said rotatable member and the interior of said barrel being formed with coacting members comprising at least one lug element and at least one cam element, there being a plurality of at least one of said elements, each of said elements of which there are a plurality successively coaeting with the other of said elements, said element comprisin a longitudinally extendin g channel, two circumferentially spaced teeth offset from said channel, and a first position stop surface between said teeth at a position offset from said channel, said
  • each cam element is fixed to said barrel and each lug element is on said rotatable member.
  • a writing instrument comprising a barrel, a pen unit slidably mounted in said barrel for movement along the longitudinal axis thereof and having a writing point at its forward end adapted to be protracted and retracted through the forward end of the barrel, spring means constantly urging said pen unit rearwardly of said biarrel toward a retracted position wherein the writing point is concealed Within the barrel, a push member slidably and non-rotatably mounted in the rear end of said barrel for movement along said axis, a rotatable member mounted in said barrel for movement along said axis and for rotation about said axis, said rotatable member being interposed between said push member and said pen unit to engage said pen unit and move axially therewith, said push member being provided with teeth directed toward the forward end of said barrel and each having a surface inclined, in a given circumferential direction relative to said axis, away from said forward end, a cam formed on the interior of said barrel including cam elements, each element comprising a channel extending longitudinally of said barrel and
  • a writing instrument comprising a barrel open at its opposite ends, a pen unit slidably mounted in said barrel for movement along the longitudinal axis thereof and having a writing point at its forward end adapted to be protracted and retracted through the forward end of the barrel, a push member slidably and non-rotatably mounted in the rear end of the barrel, said push member being provided with forwardly directed teeth each having a surface rearwardly inclined in a given circumferential direction relative to said axis, a rotatable member mounted in said barrel for movement along said axis and for rotation about said axis, said rotatable member being engaged with said pen unit to move axially therewith and interposed between said pen unit and said push member, pairs of forwardly directed circumferentially spaced teeth formed on the interior of said barrel, each tooth having a surface inclined rearwardly in the same sense as the inclined surfaces on said push member teeth, a longitudinal channel formed in the interior of said barrel to extend rearwardly from the rear end of the rearwardly inclined surface of one tooth of each
  • a writing instrument having a retractable writing point comprising a tubular casing, a cartridge mounted in said casing and axially movable with respect thereto and carrying the Writing point at one end, a spring located Within the casing and operably engaged therewith and with the cartridge to urge the cartridge to move axially of the casing from one position in which the writing point is exposed externally of the casing for writing purposes to another position in which the point is retracted within the casing, an annular member fixed in the casing at one end thereof and extending a distance toward the other end and the annular member having a plurality of longitudinally extending grooves formed in the inner surface thereof, an operating member formed with a cylindrical portion disposed co-axially but nonrotatab'ly within said annular member and movable axially relative thereto, a stud portion formed on said operating member and projecting through said casing, a spider element mounted in the casing and axially displaceable with respect thereto and in engagement with the other end of the cartridge and rotatable relative to said

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  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
US427801A 1953-05-06 1954-05-05 Writing instruments having a retractable writing point Expired - Lifetime US3120837A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB318852X 1953-05-06

Publications (1)

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US3120837A true US3120837A (en) 1964-02-11

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US427801A Expired - Lifetime US3120837A (en) 1953-05-06 1954-05-05 Writing instruments having a retractable writing point

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US (1) US3120837A (fr)
CH (1) CH318852A (fr)
DE (1) DE1017945B (fr)
FR (1) FR1167442A (fr)
GB (1) GB748897A (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3205863A (en) * 1953-12-29 1965-09-14 Parker Pen Co Writing instrument
US3288115A (en) * 1965-07-16 1966-11-29 Radiant Pen Corp Ball-point pen mechanism
US3318289A (en) * 1965-05-11 1967-05-09 Northern Ind Products Bi-stable mechanism
US4626118A (en) * 1985-03-18 1986-12-02 Bellavance Roger T Writing instrument with fastening means
USRE32656E (en) * 1987-08-12 1988-04-26 Writing instrument with fastening means
CN106144732A (zh) * 2016-08-31 2016-11-23 泉州市扬文化用品有限公司 一种按压式修正带
EP3260651A1 (fr) 2016-06-22 2017-12-27 National Oilwell Varco Norway AS Système de stockage pour des structures tubulaires
WO2020103541A1 (fr) 2018-11-23 2020-05-28 安徽华米信息科技有限公司 Dispositif portable
US10786102B2 (en) 2016-03-03 2020-09-29 Kyle L. Baltz Single hand operated collapsing hanger

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH350571A (de) * 1955-08-30 1960-11-30 Kahn David Inc Schreibgerät
DE1129399B (de) * 1956-05-17 1962-05-10 Hebborn & Co H Vorschubeinrichtung fuer Druckkugelschreiber
US2990205A (en) * 1956-07-10 1961-06-27 Kahn David Inc Writing instrument coupling
DE1082528B (de) * 1956-11-09 1960-05-25 Karl Heinrich Heinz Kugelschreiber mit Druckwechselschaltung
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
GB9113220D0 (en) * 1991-06-14 1991-08-07 Parker Pen Bv Refill unit for a writing instrument
DE4326838C2 (de) * 1993-08-10 1996-01-11 Interelektrik Ges M B H & Co K Bistabiles Magnetventil
DE102013104642B4 (de) * 2013-05-06 2021-12-09 Eto Magnetic Gmbh Elektromagnetische Stellvorrichtung, Verwendung einer solchen elektromagnetischen Stellvorrichtung und System aufweisend eine solche elektromagnetische Stellvorrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US387042A (en) * 1888-07-31 Pen or lead holder
AT162533B (de) * 1947-05-08 1949-03-10 Viktor Mali Elektrischer Druck- oder Zugschalter
GB635144A (en) * 1947-06-07 1950-04-05 Mabie Todd & Company Ltd Improvements in or relating to fountain pens

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE80470C (fr) *
US2481874A (en) * 1945-10-05 1949-09-13 Parker Pen Co Ball-point writing instrument
US2622561A (en) * 1946-08-17 1952-12-23 Parker Pen Co Ball-point writing instrument

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US387042A (en) * 1888-07-31 Pen or lead holder
AT162533B (de) * 1947-05-08 1949-03-10 Viktor Mali Elektrischer Druck- oder Zugschalter
GB635144A (en) * 1947-06-07 1950-04-05 Mabie Todd & Company Ltd Improvements in or relating to fountain pens

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3205863A (en) * 1953-12-29 1965-09-14 Parker Pen Co Writing instrument
US3318289A (en) * 1965-05-11 1967-05-09 Northern Ind Products Bi-stable mechanism
US3288115A (en) * 1965-07-16 1966-11-29 Radiant Pen Corp Ball-point pen mechanism
DE1511387B1 (de) * 1965-07-16 1974-07-18 Radiant Pen Corp Betaetigungsmechanismus fuer eine Kugelschreibermine
US4626118A (en) * 1985-03-18 1986-12-02 Bellavance Roger T Writing instrument with fastening means
USRE32656E (en) * 1987-08-12 1988-04-26 Writing instrument with fastening means
US10786102B2 (en) 2016-03-03 2020-09-29 Kyle L. Baltz Single hand operated collapsing hanger
EP3260651A1 (fr) 2016-06-22 2017-12-27 National Oilwell Varco Norway AS Système de stockage pour des structures tubulaires
CN106144732A (zh) * 2016-08-31 2016-11-23 泉州市扬文化用品有限公司 一种按压式修正带
CN106144732B (zh) * 2016-08-31 2018-08-07 泉州市一扬文化用品有限公司 一种按压式修正带
WO2020103541A1 (fr) 2018-11-23 2020-05-28 安徽华米信息科技有限公司 Dispositif portable

Also Published As

Publication number Publication date
FR1167442A (fr) 1958-11-25
DE1017945B (de) 1957-10-17
GB748897A (en) 1956-05-16
CH318852A (fr) 1957-01-31

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