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Патент USA US2411975

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Dec.l 3, 1946. `
I
G. D. NELSON
I
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' 2,411,975
PÉNC IL-LIKE IMPLEMENT
Filed Jan. 22, 1945- '
GEORGE D*.NELs oN,
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INVHvToR.
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ATTORNEY
'2,411,975
Patented Dec. 3, 1.*946
UNITED , STATES
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PATENT OFFICE
2,411,975
PENomLiKE IMPLEMENT
George D. Nelson, Los Angeles, Calif.
Application January 22, 1945, Serial No. 573,851
(C1. 12o-_13)l
~
The invention relates to a pencil-like imple
ment for housing, advancing and retracting a
stick of material such as a crayon, or eraser of
rubber or other material, or, in fact, Ta stick òf
buffing material or the like.
. .
An object of the vinvention is to provide a inan
ually-'operable feed mechanism >and casing ar
rangement wherein the stick of material may be
almost as long as the length of the implement
itself, and wherein the casing of the implement
may accommodate a stick which ñlls a major por
tion of the bore or casing.
Another object of the invention is to provide
such an implement having a feed mechanism
which is simple in construction and wherein
the device is reversible in that the feed mecha
nism may be mounted in either end ofthe casing.
For further details of the invention reference
may be made to the drawing, wherein:
2
the internal diameter of the thread 3, the inside
òf ring or lsleeve I0 having a bore II in which
sli'dably'íìts the stick I2, which may be an eraser,
crayon, buñing stick or the like.
Rotatably ñtting in the thread 3 is a nut I3
having a mating external thread I4. The nut
I3 at diametrically opposite points in its periph
ery has shallow grooves or recesses I5 and I6,
as shown in Fig. 4, to slidably ñt and receive the
strips ‘I and 8, respectively. Integral with the
front oînut I3 and arranged between the strips
-I ands is a cylindrical sleeve Il serving as a hold
er for the rear end I8 of the stick I2. The holder
Il 'serves t0 removably hold- frictionally or other
wise, the rear end I8 of the stick so that an old
'stick may be removed and a new one inserted and
held therein.
In order to iise up as much of the stick I2 as
possible, preferably the external diameter of the
Figure 1 is an enlarged, longitudinal sectional 20 holder I'I is slightly less than the` sleeve ID so that
the mit I3 can be advanced until the holder' I'I
View of a pencil-like implement according to the
present invention.
y
fits within the sleeve I0.
,_
Atthe' front 0f Casing 2 there is provided a tip
Figs. 2 to 6, inclusive, are sectional views on
I9 having a conical wall 20 having a hollow coni
lines having corresponding numbers in Fig. 1.
lFig. 7 is a schematic, longitudinal sectional view 25 cal bore 2l which converges to an outlet 22 in
which the forward end 23 of th'e stick slidingly
of the implement of Fig. '1, enlarged about one
iits.'A The rear end of tip I9 is provided with a
and one-half times.
,
reduced section 24 having an yexternal screw
Referring in detail to the drawing, the im
thread 2_5 to ñt in the casing thread 3.
plement I 0f this invention is shaped somewhat
like a pencil and comprises an elongated, cylin 30 The parts above-described are reversible, as
drical casing 2 which may b_e of plastic or other’`material, and provided with an internal screw'
thread 3. The thread 3 preferably extends the
the tip VI9 may be screwed into either end 4of the
casing' 2, the plug extension S will frictionally en
gage the thread 3 at either end of casing 2, and
rear end of casing 2 is provided a rotatable cap'
4 in whichy is secured a central plug 5 having a
aid in frictionally holding the rotatable cap 4 on
the nut I3 may be screwed into the casing 2 at
full length of the casing 2 to effect an economy
in assembling the device in that the parts are 35 either end thereof. This eiiects an economy in
the manufacture and assembly of the device.
reversible as will be explained hereafter. At 'the
The'` added frictional means which serves to
the end of~ the casing- may result from frictional
plug extension B which frictionally ñts in the
bore of the threads 3, to prevent lcap 4 _and itsY 40 engagement between the sleeveA I0 and the vscrew
associated parts from accidentally‘dropping out.
It has been found that this frictional engage
ment, plus some added friction later described,
is sui‘l‘icient for the purpose, although a more
threads 3, resulting from the fact that the metal
strips' »_'I Vand’ii are quite flexible and due >to lthis
andalso to accidentalcon-nection of these strips
Vto the sleeve I 0 out of alignment, the sleeve I0
complicated arrangement may be provided, if de 45 may, due to spring action of the strips 'I and 8y
tend to assume an offset position.
sired, for rotatably supporting cap 4 in\ the end
By rotating the cap 4 in one direction or the
_
,
other, the strips ‘I and 8 serve to advance or re
Adjacent the periphery of plug 6 is secured a
tract the nut I3 and the holder I'I and stick I2
-spindle in the form of a pair of diametrically
opposite thin metal strips 'I and 8 which extend 50 carried thereby.
In effect, a three-point support is provided for
substantially parallel to each other for almost
the stick I2, as it is supported at its rear end by
the full length of the casing 2. The forward ends
the holder I'I, at an intermediate point by the
of the strips 'I and 8 are suitably secured as by
sleeve I0, and at its forward point by the out
means of solder 9 to a sleeve I9 of thin metal
and having an external diameter slightly less than 55 let 22.
of casing 2.
2,411,975
3
4
said screw thread, said nut having shallow op
The converging conical bore 2I serves to guide
posed recesses in the periphery thereof, a holder the forward end 23 of the stick outwardly through
for the rear end of said stick on the forward end
the tip I9.
of said nut, a rotatable cap on the rear end of
As shown in Fig. 7, nut I3 may be retracted
to the rear end of the casing 2, and the stick IZ Ci said casing, a, pair of substantially parallel strips
secured at their rear ends to said cap and slidably
may be substantially as long as the casing 2.
receiving and ñtting said recesses, a ring secured
Also, ring I0 may be thin and large enough to
to the forward ends of said strips, said ring hav
loosely fit in the threaded bore of casing 2, and
strips 'I and 3 may be thin and extend close to
the threads 3, where the diameter of stick I2
ing a bore to slidably support an intermediate
portion of the stick, the forward end of said cas
may be more than one-half and, in fact, about
ing comprising a conical wall providing a con
three-quarters or more of the internal diameter
of bore of threads 3 in the casing 2.
verging bore, the forward end of said conical wall
defining an outlet in which the stick slidingly
ñts, said conical wall serving to guide the stick
to said outlet.
As rubber deteriorates when exposed to the
light, and as it may become soiled when handled,
both of these defects are overcomein thecase `
that the stick I2 is a rubber eraser, because the
casing 2 excludes the light from the eraser and
prevents it from becoming soiled.
An ordinary pencil eraser, such as the one usu
ally provided on the end of _a lead pencil, tends
to creep out of its ferrule or holder when the
eraser is in use. This is prevented in the usual
case by crimping the holder into the body of the
eraser. By actual test of the implement of Fig. 1,
it has been found that when employing an elon
gated rubber eraser for the stick I2, it does not
creep outl of its holder Il, illustrated as a cylin
drical cup, evfen though the interior wall of
holder Il is smooth, as illustrated. In one of the
tests the inside wall of the holder Il was provided
with a partial screw thread to grip the rear end
of the eraser, but it was found that this was not
necessary. The rear end of the cup-shaped holder
Il may be provided with a rearwardly converg
ing conical portion 26 and the rear end I8 of the
eraser I2 may be similarly tapered to fit therein.
The reason why the rubber eraser does not creep
out of the holder Il is probably due to the fact
that when the eraser is in use, all of the flexing
of the eraser takes place either at the outlet 22 or
at least Abetween the outlet 22 and the intermedi
ate support provided by the ring Iß, whereby
there is no lateral flexing or creeping tendency
at the holder I'l, while the downward pressure on
the forward end of the eraser pushes it more
ñrmly in the holder Il. Therefore, it is unneces
sary to crimp the holder I1 into the body of the
eraser as is ordinarily done with a lead pencil
eraser, but instead the holder I1 may constitute
means for removably holding the rear end of the
eraser which facilitates its insertion and removal.
Various modifications may be made in the in
vention without departing from the spirit of the
following claims. For example, one may dispense
with the reversible feature above-described and
make the tip I9 integral with the casing 2.
I claim:
.
_
1. A pencil-shaped implement for a stick of ma
2. A pencil-shaped implement for a stick of ma
terial, viz, crayon, eraser or the like, said imple
ment comprising a casing having an elongated
cylindrical wall, a screw thread on the inside of
said wall the full length thereof, a nut in said
casing rotatably ñtting said screw thread, means
on said nut for removably holding the rear end
of said stick, a rotatable cap ñtting either end of
said casing, said cap having a smooth plug por
' tion frictionally ñtting in the threaded end of
said casing wall at either end thereof, a conical
tip providing a converging bore, the rear of said
tip having an external screw thread ñtting in
said casing thread at the other end of said cas
ing, the forward end of said tip defining an out
let in which the stick slidingly fits, said tip hav
ing a conical wall serving to guide the stick to
said outlet.
3. A pencil-shaped implement according to
claim 1, wherein said strips are thin and closely
adjacent to said casing thread, said holder, said
ring bore and said outlet being constructed and
arranged to accommodate a stick having a cross
sectional area at least as large as one half of
the cross sectional area of the inside of said cas
ing.
4. A pencil-shaped implement for a stick of
material, viz., crayon, eraser or the like, said im
_ plement comprising a casing having an elongated
4 5' cylindrical wall, a screw thread on the inside of
said wall, a nut in said casing rotatably ñtting
said screw thread, said nut having a shallow re
cess in the periphery thereof, a holder for the
f rear end of said stick on said nut, a rotatable
'I cap on the rear end of said casing, and an elon
gated strip secured at its rear end to said cap and
slidably receiving and ñtting said recess, the for
vïard end of Said casing having an outlet for the
s ick.
" 5. A pencil-shaped implement according to
claim 4, wherein said strip is thin and closely ad
jacent to said casing thread, said holder, and
said outlet being constructed and arranged to
,_ accommodate a stick having a cross sectional area
terial, viz, crayon, eraser or the like, said imple 60 as large as the major portion of the cross sec
ment comprising a casing having anv elongated
tional area of the inside of said casing.
cylindrical wall, a screw thread on the inside'of
said wall, a nut in said casing rotatably fitting
GEORGE D. NELSON.
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