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Nov. 13, 1962
3,063,419
D‘ PARKER
WRITING INSTRUMENTS
Filed April 2, 1956
INVENTOR.
DAN/EL PAD/(£7?
BY
K/MMJWZ W
United States Patent 0 ’ "ice
2
1
3,063,419
‘
3,053,419
Patented Nov. 13, 1962
WRITING INS RUMENTS
Daniel Parker, Milton Junction, Wis., assignor to The
Parker Pen Company, Janesville, Wis., a corporation
of Wisconsin
Filed Apr. 2, 1956, Ser. No. 575,448
5 Claims. (Cl. 120--42.03)
In the projection and retraction of the writing unit, the
feed section 17 slides through bore 18 while the rear
end of the writing unit 7 slides in the upper or rear por
tion of the main bore of the writing instrument.
A permanent magnet 13 is associated with the writing
unit 7 for movement therewith reciprocally in the barrel,
and is preferably disposed at the extreme rear end of the
unit 7. The magnet 13 may be attached to the writing
unit either magnetically or physically. In FEGS. 1 and
The present invention relates to writing instruments,
and more particularly to writing instruments having a 10 2 the magnet 13 is attached to the writing unit 7 mag
netically in that a magnetic element, such as a slug or
projectable and retractable writing unit.
cap 14 of magnetically attractable material, is ?xed to
A writing instrument of this general character includes
the rear end of the writing unit 7 and is attracted to
a barrel and a writing unit in the barrel movable be
magnet 13. The magnet 13 is thus magnetically attached
tween a retracted position in which the writing point of
the unit is concealed in the barrel and a projected posi 15 to the slug 14. However, as is illustrated in FIG. 6,
this magnet may bephysically attached to the writing
tion in which the writing point is exposed forwardly
unit. In FIG. 6, magnet 13’ is mounted directly on the
beyond the barrel in writing position.
rear end of writing unit 7'.
The construction is thus especially adaptable but not
Referring to FIGS. 1 and 2, a magnet 9 of reversible
limited to ball point writing instruments wherein it is
polarity is provided to enable the magnet 13 to be either
desired that the writing point be retracted for placing
attracted thereto or repelled therefrom depending upon
the instrument in the pocket without soiling the pocket
the polarity of magnet 9. Permanent magnet 9 is piv
with ink or other writing composition.
otably mounted on the barrel as at 10 so that the polarity
An object of the invention is to provide a novel writ
of permanent magnet 9 may be reversed by rotating the
ing instrument utilizing magnetiemeans for both pro
25 magnet 180 degrees aboutv its pivot point.
jecting and retracting the writing unit.
Another object of the invention is to provide a novel
The magnet
9 may be mounted in a circular element‘ll which may
be manipulated by the thumb or fore?nger to easily rotate
writing instrument utilizing reversible polarity magnetic
magnet 9 about its pivot point to reverse its polarity. The
means for projecting and for retracting the writing unit.
circular element 11 is provided with serrations 12 around
Still another object is to provide a writing instrument
of the character noted having magnetic means for both 30 its circumference to facilitate such manipulation.
Referring to FIG. 1, the position of magnet 9 is such
projecting and retracting the writing unit, and having
that its lower pole is of the same polarity (s) as the
means for holding the writing unit in projected position
upper pole (s) of permanent magnet 13. i’ermanent
but releasable in response to operation of the magnetic
magnet 13 is thus repelled away from magnet 9 forcing
means to all-ow the magnetic means to retract the writing
35 the writing unit forwardly. The writing unit is thereby
unit to retracted position and retain it there.
It is a further object to provide a retractable writing
instrument having a pair of magnets, the polarity of one
of which is reversible to thereby selectively attract and
magnetically projected to the projected position.
By simply rotatively manipulating magnet 9 to the
position shown in FIG. 2, the polarity of magnet 9 is.
repel the other magnet for projecting and retracting the 40 reversed so that the lower pole of magnet 9 is of the
opposite polarity (n) as the upper pole (s) of magnet
writing unit of the writing instrument.
13. The magnet 13 is therefore attracted to magnet 9,
These and other objects will appear from the following
moves rearwardly theretoward, and the writing unit fol
detailed description taken in conjunction with the accom
lows magnet 13 to be thus magnetically retracted to the
panying drawing in which:
retracted position.
FIG. 1 is a longitudinal sectional view of a writing
The strength of magnets 9 and 13 may be selected to
instrument embodying the invention, with the writing
‘give the desired forces for projecting and retracting the
unit in projected position;
writing unit and for maintaining the writing unit in pro
FIG. 2 is a view similar to FIG. 1 but with the writing
jected position and retracted position. The small but
unit in retracted position;
very strong “Alnico” permanent magnets are preferred
FIG. 3 is a sectional view of the lower portion of a
writing instrument illustrating an alternate ‘form of pro
jection holding means;
50 but the invention is not to be limited thereto, as any
suitable magnets may be used.
Additional projection holding means may be provided
to aid in maintaining the writing unit in projected posi
bodiment of the invention, FIG. 4 showing the writing 55 tion during writing. In FIGS. 1 and 2, for example,
such additional projection holding means takes the form
unit in projected position and FIG. 5 showing the writing
FIGS. 4 and 5 are longitudinal sectional views of a
portion of a writing instrument illustrating another em
unit in retracted position; and
'
FIG. 6 is a sectional view of a portion of a writing
of a tapered portion 15 on the writing unit and a cor
responding tapered portion 16 in the barrel. These ta
pered portions engage wedgingly when the writing unit
instrument illustrating an alternate form of construction
which may be utilized with the embodiment of the in 60 is magnetically projected to the projected position and
thus aid in maintaining the writing point projected while
vention shown in FIGS. 1 and 2.
writing. When the polarity of the reversible polarity
The writing instrument shown in FIGS. 1 and 2 in
magnet is reversed, the writing unit is ‘magnetically at
cludes a barrel 6 which may be made of any desired suit
tracted rearwardly, the tapered portions disengage, and
able material such as plastic or metal. A writing unit 7
the unit moves rearwardly to retracted position.
having a writing point 8 is mounted in the barrel for
The additional projection holding means may alter
sliding movement between projected position (FIG. 1)
in which the writing point is exposed forwardly beyond
the barrel for writing purposes, and retracted position
FIG. 2) in which the writing point is concealed in the
natively take the form, as illustrated in FIG. 3, of one or
more spring ?ngers 160 engageable with the rearwardly
facing shoulder of widened portion 150 of the writing
barrel. The writing unit may be a standard or conven 70 unit. When the writing unit is magnetically projected for
wardly, the widened portion 150‘ of the unit snaps past
tional ball point cartridge in which the writing composi~
the spring ?ngers 160, and the unit is held projected as
tion is fed to the ball point 3 through a feed section 17.
3,063,419
3
shown in FIG. 3.
4
When the polarity of magnet 9 is
writing unit and a corresponding tapered portion in the
reversed, the unit is magnetically attracted rearwardly,
barrel arranged for wedging interengagement when the
writing unit is magnetically projected.
and the spring ?ngers 164} spread and release the unit
and the unit moves on rearwardly to the retracted posi
tion.
FIGS. 4 and 5 illustrate another embodiment of the in
3. The invention de?ned in claim 1, including a pro
Cl
jected position holding means for releasably retaining
said Writing unit in projected position, wherein said pro
vention wherein there is provided in a barrel ‘60, a for
jected position holding means comprises a rearwardly
wardly facing shoulder 22 between a rear bore 20’ and a
facing shoulder on the writing unit and a spring ?nger
forward bore 19‘. A permanent magnet 130, slidable in
mounted in the barrel for latching engagement with the
upper bore 20, may be repelled from or attracted to the 10 shoulder when the writing unit is magnetically projected.
reversible polarity magnet 90. A plug or cap of mag
4. The invention de?ned in claim 1, including a pro
netically attractable material 140 is ?xed to the rear end
jected position holding means for releasably retaining said
of writing unit 70 so that the writing unit attaches to
Writing unit in projected position, wherein said projected
and follows magnet 130. Magnet 130, at its forward end,
position holding means comprises a forwardly facing
is cam-shaped to have a camming effect on the writing
shoulder in the barrel arranged for latching engagement
unit 70 when the magnet 130' is moved forwardly. Thus,
when magnet 130 is repelled from magnet 90, the writing
unit 70 is not only projected forwardly but is also moved
laterally by this camming action to engage the forward
ly facing shoulder 22. Forwardly facing shoulder 22
therefore provides an additional projection holding means
for maintaining the writing unit in projected position
against the forces applied during writing. The manipula
tion for projection and retraction is as explained hereto
fore, i.e. by rotating magnet 90 to the position shown in
FIG. 4, the Writing unit 76]‘ is projected by magnetic re
pulsion to the projection position, and by rotating the
magnet 90 to the position shown in FIG. 5, the writing
unit 70 is retracted by magnetic attraction to the re
tracted position.
I claim:
1. A writing instrument comprising: a barrel; a writing
unit movable in said barrel between a projected and a
with the writing unit when it is magnetically projected.
5. A writing instrument comprising: a barrel; a writing
unit movable in said barrel between a projected and a
retracted position; an element of magnetically attractable
material mounted on the rear end of said writing unit; a
?rst permanent magnet slidable in said barrel and dis
posed therein rearwardly of said element and magnetically
attached to said unit; said ?rst magnet having a cam
surface at its forward end; a second permanent magnet
pivotably mounted on said barrel rearwardly of said ?rst
magnet to permit reversal of its polarity for attracting and
repelling said ?rst magnet to thereby magnetically retract
and magnetically project said writing unit; said barrel
having a forwardly facing shoulder therein; said cam sur
face on said ?rst magnet acting to laterally displace said
Writing unit into latching engagement with said shoulder
when the writing unit is magnetically projected thereby
acting to hold said unit in projected position.
retracted position; an element of magnetically attractable
material mounted on the rear end of said writing unit; a 35
?rst permanent magnet slidable in said barrel and dis
posed rearwardly of said element and magnetically at
References Cited in the ?le of this patent
UNITED STATES PATENTS
tracting said element; a second permanent magnet mount
ed on said barrel rearwardly of said ?rst magnet for
manipulation to permit reversal of its polarity for attract 40
2,557,634
Cox ________________ __ June 19, 1951
2,683,931
Fahlgren ____________ __ July 20, 1954
2,693,170v
Sears ________________ __ Nov. 2, 1954
ing and repelling said ?rst magnet to thereby magneticalo
ly retract and magnetically project said writing unit.
2. The invention de?ned in claim 1, including a pro
2,711,022
2,793,618
2,870,741
Salfelder ____________ __ June 21, 1955
Benson et al. _________ __ May 28, 1957
Kersten _____________ __ Ian. 27, 1959
145,325
Germany ____________ __ Nov. 25, 1903
jected position holding means for releasably retaining said
writing unit in projected position, wherein said projected
position holding means comprises a tapered portion on the
FOREIGN PATENTS
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