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Патент USA US2137022

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Nov. 15, 193s.
J'. p. LYNN
Filed June >l„ 1936
Patented Nov. 15, 1938
i .lohn P. Lynn, Chicago, Ill., assignor, by direct
and mesne assignments, to Dur-O-Lite Pencil
Company, a corporation of Delaware
Application June 1, 1936, Serial No. 82,687
2 Claims. (Cl. 1Z0-18)
This invention relates to a pencil having a‘ ing through the tip and therebeyond for recep
propelling mechanism actuated by relative rota
tion within' an axial passageway in the body,
tion between its body and a tip which is releas
presently to be described. The upper end of this
ably connected thereto. More particularly this tube terminates in a neck I'I having internal
5 invention has to do with certain improvements
threads for engaging with the external threads 5
by which I attain greater simplicity and light
of a metal propeller I8 at whose upper end is a
ness in the construction of the pencil body. In ñat wide head I9, as shown. Such fa propelling
addition, the present improvements are directed mechanism
is well known in the art, an exam
to a head for the body, and to the mounting of
disclosed in the Lynn Patent
10 a clip exteriorly of the body in cooperation with No. 1,828,871being
of October 27, 1931.
the head. The advantages and purposes of these
The pencil body comprises a cylindrical shell l()
improvements, as well as others which will here
S which surrounds an insert I. The lower end
inafter appear, are set forth in the succeed
of the shell which desirably extends just be
ing description and claims, and in the accom
4l5: panying drawing wherein is illustrated certain
suggestive embodiments of my invention, as
Figure 1 is a longitudinal section taken cen
trally through the pencil in its extirety;
Figs. 2, 3 and 4 are transverse sections taken,
respectively, on lines Z--2, 3_3 and 4----4, of
Fig. 1;
Fig. 5 is a detail in perspective of the sleeve
which is ñtted into the chambered head of the
Fig. 6 is a detail in perspective of the head
and shoulder portion of the clip which is se
cured to a pencil having the construction of
Fig. 1;
yond the corresponding end of the .insert is
adapted to abut the proximate end of the tip l5
which, as shown, is cylindrical.
At its lower
end the insert is provided with an extension
which is slightly reduced in diameter so as to
enter and fit within a cylindrical chamber 2B in
the proximate end of the tip. The shell may be 20
of any suitable materiaL-moldable composition
preferred, and its walls are suiiiciently thin to
endow the shell with resiliency. The insert is,
by preference, light in weight and for this pur
pose is desirably formed of moldable composi
tion material. Relatively considered, the shell
is desirably softer than the insert whose density
is somewhat greater. The primary purpose of
the shell is to provide a suitable exterior sur
Fig. 'l is a fragmentary longitudinal section
_ face for the insert. As indicated in Figs. 2 and
through a pencil whose head is modified in con
3, the interior surface of the shell is cylindrical 3()
and the exterior surface of the insert is polyg
Fig. 8 is a transverse section therethrough, onal, the angles formed by its meeting faces
taken on line 8-8 of Fig. '7;
engaging with the smooth inner surface of the
Fig. 9 is a detail in perspective of the chan
shell. In practice, the insert may beirictionally
neled head end of the insert used with the pencil
iitted within the shell so that, once assembled, to Cil
of Figs. 7 and 8;
Fig. 10, which is a View similar to» Fig'. '7,
shows a pencil having a modiñed construction
,m of head having a'split sleeve;
Fig. 11 is a transverse section, taken on line
II-II of Fig. 10;
Fig. 12, which is a similar section, shows the
split sleeve with its ends overlapped as during
45 the operation of assembly; and
Fig. 13 is a view in perspective of the sleeve
which is ñtted into the chambered head of the
pencil construction shown in Fig. `l0.
Referring now to Fig. 1, the operating unit.of
5() the present pencil may comprise a generally coni
cal tip A of composition material with a metallic
terminal I5 through which is a bore forming a
guide for a lead L which is fed therethrough.
Within the terminal is an axial bore wherein
55 is anchored one end of a guide tube I6 extend
they remain inseparably and immovably joined.
in the process of assembly the insert may, if
necessary, cut line grooves in the inner surface
of the shell whereby to resist eiiectively any
possibility of relative rotation therebetween.
The air spaces between the insert and shell con
duce appreciably to lightness in weight, and
also permit of slight flexing of the shell in re
sponse to pressure of the hand in use.
The insert is provided axially with an elongated
non-round passageway or bore the cross sec
tional form of which is best indicated in Fig. 2.
This passageway comprises an axial cylindrical
opening 2| with slots 22 extending lengthwise
along opposite sides thereof. Such a passageway
is adapted to accommodate the propeller and its
head which is free to slide longitudinally but notI
rotatively therewithin, movement of the metal
propeller within the composition insert taking 55
place without noise or squeaks of any kind. 'I'he
upper end. Exactly the same clip G may be ap
lower end of this passageway is cylindrical in
contour to accommodate a lining 23 which is
anchored ñxedly therewithin. The lower end
of the lining extending into the chamber of the
the panel 45 and below a slitted head sleeve H
which is fitted around thc upper cylindrical end
tip is slitted to provide spring sections adapted to
engage frictionally, yet rotatably, with the guide
tube I6 whereby the tip is secured releasably to
the pencil body.
The passageway 2| terminates a substantial
distance below the upper end -of the insert,
according to the showing in Fig. l. A cross wall
25 separates this passageway from a chamber
26 which extends thereabove through to the
15 upper end of the insert, thereby providing a
magazine for the reception of reserve leads L.
Beyond the end of the insert the walls of the shell
are extended to lengthen the magazine chamber.
As shown, the shell may be aligned interiorly
with a head sleeve H (see Fig. 5) which is ñtted
interiorly of the shell to present its lower end
in substantial abutting relation to the upper end
of the insert.
The sleeve which is desirably formed of some
resilient material may be slitted as at 30 inter
mediately of its ends whereby to render its
cylindrical surface somewhat compressible.
its upper region it is formed with an annular
be fitted the eraser bushing 32 adapted to rest
against the end of the insert; the cap C when
applied over the sleeve may rest against a ring
42 forming a decorative annulus the same as
hereinbefore described.
For all practical pur
poses, this construction is the same as that de
scribed in connection with Fig. 1, and the manner
of assembly of its parts is likewise the same.
Referring now to Figs. l0 to 13 inclusive, the
insert I in this construction terminates well be
low the upper end of the shell S and the cham
ber 26 thus provided interiorly of the shell may
be lined with a split head sleeve H (see Fig. 13) 20
having interiorly of its ends a sunken panel
33 whose lower end lies opposite a slot 35 in the
shell. A clip G, the same in construction as that
previously described, is adapted to be carried
by such a pencil with its neck passing through 25
the slot so as to present the clip head 36 within
the panel of the sleeve. The sleeve in this con
struction is produced from a plate rolled into a
cylinder with its adjacent edges overlapped (see
Fig. 12) during the act of assembly whereby to 30
one of which may be rested the bottom end of
an eraser bushing 32 which is ñtted frictionally
into the upper en'd of the sleeve. An inset panel
33 extends upwardly from the lower end of the
past the clip head to its iinal position where the
sleeve springs out to fully expanded condition
(see Fig. 11). When so positioned, the sleeve
half the length.
In the assembly of the sleeve within the upper
end of the shell, the panel is located opposite
a slot 35 through the shell. Into the space be
40 tween the shell and panel is fitted the head 36
of a clip G having a neck 31 adapted to lie within
the slot 35 of the shell, and exteriorly thereof a
shoulder 38 below which is the clip body 39 ter
minating in a foot 40 adapted to bear with ten
sion against the shell exterior. The clip is thus
secured in place with its head accommodated
within the sunken panel of the sleeve and its
shoulder engaging with the shell exterior, and
in this relation the parts may be locked as by
of the insert and to the inside of the shell S.
This sleeve extends beyond the shell, as shown,
to afford an interior surface against which may
head 3| extending both inwardly and outwardly
to provide, in eiTect, a pair of shoulders against
“ sleeve along one side for a distance of perhaps
plied to this pencil, its head being fitted against
contract the sleeve as necessary for movement
interlocks with the cliphead to secure both itself 35
and the clip permanently in place.
Fitted into
the upper sleeve end is an eraser bushing 32 over
which is a cap C having a frictional engagement
with the exterior of the sleeve and resting upon
a ring 42 which forms a decorative annulus.
It will be noted that the insert, together with
the operating mechanism, is a unit complete in
itself, and does not require the presence .of the
outer shell for its functioning. Such a shell,
however, is highly desirable because it furnishes 45
a suitable exterior for the insert, and additionally,
it cooperates therewith, or with the head sleeve,
to secure in place a clip having the construction
just described. For these reasons, the present
pricking out a point 4| just below the clip neck.
improvements are highly advantageous.
Resting upon the upper end of the shell and
confined in place by the bead 3| of the sleeve
H is a ring 42 affording an ornamental annulus,
and above the ring I may apply a cap C overlying
an eraser for frictional fitting upon the upper
end of the sleeve whereon I have provided cer
tain ribs 43 which afford surfaces of limited
areas with which the cap engages, thereby facili
I claim:
l. In a pencil comprising a tip portion carry
ing a lead propelling mechanism including a
screw member with non-round head projected
tating its removal from the pencil, when needed.
Substantially the same construction is dis
closed in Figs. 7, 8 and 9 where the operating
thin walled cylindrical shell and a tubular insert
of moldable composition having a polygonal cross 60
section irictionally inserted in said shell.
mechanism may be identical. As shown in Fig. '7,
however, the insert I extends upwardly to a point
beyond the corresponding end of the shell S
whereby the chamber 26 within the insert requires
pelling mechanism mounted within said body for
movement relative thereto, said body comprising
no inner lining such as is furnished in the con
struction of Fig. I.
Instead, the upper end of
the insert is channeled along one side to provide
a sunken panel 45 and thereabove is rounded
70 to afford a cylindrical contour 46 adjacent its
rearwardly and a body portion rotatably con
nected with said tip portion and having a non
round bore for cooperation with said screw mem
ber, the combination in said body of a relatively
2. In a pencil having a body and a lead pro
a relatively thin walled cylindrical shell and a 65
tubular insert of moldable composition having
a polygonal cross section frictionally iitted with
in said shell.
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