US3051131A - Retractable ball-point pen - Google Patents

Retractable ball-point pen Download PDF

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Publication number
US3051131A
US3051131A US818598A US81859859A US3051131A US 3051131 A US3051131 A US 3051131A US 818598 A US818598 A US 818598A US 81859859 A US81859859 A US 81859859A US 3051131 A US3051131 A US 3051131A
Authority
US
United States
Prior art keywords
insert
pushbutton
ball
casing
locking
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
US818598A
Other languages
English (en)
Inventor
Schwarzaugl Josef Maria
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.)
Faber Castell AG
Original Assignee
AW Faber Castell GmbH and Co
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 AW Faber Castell GmbH and Co filed Critical AW Faber Castell GmbH and Co
Application granted granted Critical
Publication of US3051131A publication Critical patent/US3051131A/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

Definitions

  • the present invention relates to a ball-point pen comprising a tubular casing with a retractable ball-point insert therein carrying a retracting spring and a push button projecting from the rear end of the casing and carrying a locking member which connects the pushbutton with the rear end of the ball-point insert and which, when the pushbutton is depressed and the insert is thereby advanced to the writing position against the action of the retracting spring, is moved by the resilient pressure of the ball-point insert into a locking engagement with a part of the casing so as to maintain the insert in the writing position.
  • the ball-point pens known prior to this invention had the disadvantage that the locking mechanism was relatively complicated and consisted of a plurality of parts which were difiicult to produce and easily became defective, for example, by the fatique of the material of these parts, such as spreading springs, whereby the entire ballpoint pen became useless.
  • the pushbutton of the retractable ball-point pen is provided with a locking member which has a locking projection on its lower end and an inclined cam edge adjacent thereto.
  • the pushbutton When the pushbutton is depressed, the upper end of the ball-point insert is pressed by the action of the retracting spring against the inclined cam edge and thereby shifts the locking member outwardly so that the locking projection thereon engages with a suitable abutment on the inside of the casing and thus maintains the ball-point insert in the writing position.
  • the locking projection may be easily disengaged from the abutment so that the retracting spring can retract the ball-point insert into the casing and thereby also move the pushbutton to its outwardly extended position.
  • a very simple embodiment of the invention consists in providing the pushbutton of a hollow construction with a pair of opposite slots in its side wall near the upper and lower end thereof, and in inserting into this hollow push button a locking member in the form of a substantially S-shaped arm which has a locking projection at its lower end which extends through the lower slot in the wall of the pushbutton and is adapted to snap underneath an abutment on the inner wall of the casing when the pushbutton is being depressed.
  • the lower end of the locking arm Adjacentto the locking projection, the lower end of the locking arm has an inclined cam edge against which the rear or upper end of the ball-point insert engages under the resilient pressure of the retracting spring and thereby moves the lower end of the locking arm outwardly so that the locking projection will remain in engagement with the mentioned abutment.
  • the upper end of the S-shaped locking arm projects through the upper slot in the wall of the pushbutton so that, when a lateral pressure is exerted upon this upper end of the locking arm, the lower locking end will be withdrawn from the abutment, permitting the retracting spring to retract the ball-point insert into the casing.
  • the upper end of the insert which engages with the cam edge of the locking arm will at the same time move the pushbutton to its outwardly extended position.
  • the pushbutton is made of two parts and designed similar to a pair of tongs or pliers.
  • Each of these parts has a locking projection at its lower end and an adjacent inclined cam edge. Both of these cam edges engage under the resilient pressure of the retracting spring with the edge of the rear end of the ball-point insert at diametrically opposite points thereof so that the combined action of these cam edges upon the insert will always be central relative to the insert.
  • FIGURE 1 shows a longitudinal section of a ball-point pen according to the invention with a locking member in the hollow pushbutton thereof and with the ball-point insert in the released or retracted position;
  • FIGURE 2 shows a cross section taken along line IIII of FIGURE 1;
  • FIGURE 3 shows a longitudinal section of the ballpoint pen according to FIGURE 1 but with the ballpoint insert in the writing position;
  • FIGURE 4 shows a longitudinal section of a modification of the ball-point pen according to the invention with a two-part pushbutton in the retracted position of the ball-point insert;
  • FIGURE 5 shows a cross section taken along line VV of FIGURE 4; while FIGURE 6 shows a longitudinal section of the ballpoint pen according to FIGURE 4 but with the ball-point insert in the writing position.
  • the ball-point pen according to the in-' vention consists of a tubular casing 1 forming the holder of a ball-point insert 2 which may be locked in an advanced writing position within casing 1 or retracted into the casing by the action of a retracting spring 3.
  • the front end of this retracting spring 3 rests upon an inner shoulder in the tip of casing 1 and acts with its rear or upper end against a small flange 2" on the insert 2.
  • the rear end of the tubular casing 1 is closed by a cap 6 which has a central bore in which a hollow pushbutton 4 is slidable in the axial direction.
  • the lower end of pushbutton 4 has an outwardly projecting flange 4" which is adapted to engage with the lower end 6 of cap 6 when it is in the upward position.
  • the hollow pushbutton 4 contains a substantially S-shaped locking member 5, the upper end portion 5 of which projects from the pushbutton through an opening 4' in the wall thereof, while the lower end 5" forms a locking portion 5" which projects in the opposite direction from portion 5' through another opening 4" in the wall of pushbutton 4.
  • An inclined cam edge 5" on locking member 5 adjacent to locking portion 5" engages with the upper end 2' of ball-point insert 2 which is pressed in the upward direction by spring 3.
  • the end cap 8 is secured to casing 1 by means of a threaded bushing 7 which also serves as a guide for maintaining the ball-point insert 2 in a central position within casing 1a.
  • the central bore in cap 8 has two inner enlarged recesses so as to form two shoulders 8' and 8".
  • Pushbutton 9, is made of two parts similar to a pair of pliers with the upper end portion projecting from cap 8 being divided longitudinally and adapted to open and close.
  • the locking member 5 of pushbutton 4 of the embodiment according to FIG- URES l to 3 has only one cam edge 5"
  • the pushbutton 9, 10 according to FIGURES 4 to 6 is provided with two cam edges, namely, a cam edge 9 and 10' on the lower end of each of the pushbutton parts 9 and 10, respectively.
  • Flange 9" is preferably provided with, a conical surface, which is adapted to engage with a corresponding conical surface of shoulder 8" and thereby tends to press the two parts 9 and 10 of .the pushbutton toward each other.
  • a ballpoint pen comprising, in combination: a tubular casing having a rear end and an annular shoulder within said rear end; a ball point insert within said casing; a retracting spring acting upon said insert for retracting the same into said casing from an advanced writing position to a retracted position; a tubular hollow push button closed at its outer end and having an outwardly directed flange at itsopposite inner end, said push button being slidably mounted within said rear end of said casing, said flange of said push button engaging in said retracted position of said insert said annular shoulder within said rear end of said casing, said push button having a wall provided with a first aperture above said rear end of said casing and a second aperture near said flange; a flat and substantially S-shaped locking member loosely arranged within said hollow push button, said locking member having an upper actuating end portion extending radially outwardly through said first aperture and a lower end portion provided with an inclined cam surface engaging with said rear
  • a ball-point pen comprising, in combination: a tubular casing having a rear end; a cap detachably connected to said rear end of said casing for closing the same, said cap having a central bore as well as an inwardly projecting face; a ball point insert within said casing; a retractingspring acting upon said insert for retracting the same into said casing from an advanced writing position to a retracted position; a tubular hollowpush button closed atone end and having an outwardly directed flange at its other end, said push button being slidably mounted-within said central bore of said cap, said inwardly projecting face of said cap forming an annular shoulder serving as an abutment for said outwardly projecting flange of said push button in said retracted position, said push button having a wall provided with a first aperture'above said rear end of said casing and a second aperture near said flange;
  • a flat locking member loosely arranged-within said push' button said locking member having anupper actuating portion extending outwardly through said first aperture and having a lower end portion provided with an inclined cam surface engaging with saidrear end of said insert under the resilient pressure of said retracting spring for pressing said locking member outwardly and upwardly into engagement with the upper edge of said upper aperture; and a locking shoulder provided at said lower end portion. of said locking member extending through said second aperture to engage said shoulder of said cap when said push button is pressed into said casing, the upper edge of said upper aperture forming a pivot point for said locking member whenbeing moved into locking position, while the upper edge of said lower aperture forms a pivot point when said actuating portion of said locking member is moved inwardly, thereby unlocking said locking shoulder.

Landscapes

  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Pens And Brushes (AREA)
US818598A 1958-06-11 1959-06-08 Retractable ball-point pen Expired - Lifetime US3051131A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF25935A DE1176519B (de) 1958-06-11 1958-06-11 Druckkugelschreiber mit einem einen Halte-nocken mit einer Schraegflaeche aufweisenden Sperrglied

Publications (1)

Publication Number Publication Date
US3051131A true US3051131A (en) 1962-08-28

Family

ID=7091821

Family Applications (1)

Application Number Title Priority Date Filing Date
US818598A Expired - Lifetime US3051131A (en) 1958-06-11 1959-06-08 Retractable ball-point pen

Country Status (6)

Country Link
US (1) US3051131A (fr)
CH (1) CH374567A (fr)
DE (1) DE1176519B (fr)
FR (1) FR1226397A (fr)
GB (1) GB863953A (fr)
NL (2) NL239498A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3203402A (en) * 1961-11-14 1965-08-31 Scripto Inc Mechanism for retractable writing instruments
US8833606B2 (en) 2012-01-03 2014-09-16 Howmedica Osteonics Corporation Device and method for mixing and applying biomaterials
US8905092B2 (en) 2012-04-16 2014-12-09 Jameg Sanders Gas pump key

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2741226A (en) * 1953-11-03 1956-04-10 Essex Corp Ball pen
US2800882A (en) * 1953-12-14 1957-07-30 Scripto Inc Latch means for retractable ball pens
US2823645A (en) * 1956-07-20 1958-02-18 Joseph Szallar Fountain pen
GB805573A (en) * 1957-02-11 1958-12-10 Ernest Verrinder Wagner Improvements in writing instruments
US2929360A (en) * 1953-12-14 1960-03-22 Scripto Inc Latch means for retractable ball pens

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1720745U (de) * 1955-11-09 1956-04-19 Emmanuel Wexler Kugelschreiber.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2741226A (en) * 1953-11-03 1956-04-10 Essex Corp Ball pen
US2800882A (en) * 1953-12-14 1957-07-30 Scripto Inc Latch means for retractable ball pens
US2929360A (en) * 1953-12-14 1960-03-22 Scripto Inc Latch means for retractable ball pens
US2823645A (en) * 1956-07-20 1958-02-18 Joseph Szallar Fountain pen
GB805573A (en) * 1957-02-11 1958-12-10 Ernest Verrinder Wagner Improvements in writing instruments

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3203402A (en) * 1961-11-14 1965-08-31 Scripto Inc Mechanism for retractable writing instruments
US8833606B2 (en) 2012-01-03 2014-09-16 Howmedica Osteonics Corporation Device and method for mixing and applying biomaterials
US8905092B2 (en) 2012-04-16 2014-12-09 Jameg Sanders Gas pump key

Also Published As

Publication number Publication date
FR1226397A (fr) 1960-07-11
CH374567A (de) 1964-01-15
NL239498A (fr)
NL110635C (fr)
DE1176519B (de) 1964-08-20
GB863953A (en) 1961-03-29

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