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Патент USA US2134570

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Oct. 25, „1938.
J. MEILNER
2,134,570
PENCIL
Filed May 17, 1955
INVENTOR
ATTORN EYS
Patented Oca-*25, 1938
2,134,510
, UNITED -s'rlrrr-:s .PATENT OFFICE
2,134,570
PmClL
:mph Manner, west om“, N. J., mimo: to
Eagle Pencil Company, a corporation of Dela
~ Application any 17, 1935, sei-n1 No. 21,945
s claims. (ci. izo-_zatiÄ
- My present invention relates to pencils. more 2l. 'I'he two jaws face `each other, _but are spaced
particularly to the so-cailed clutch type pencil of by a gap 2l.
‘
`
the character commonly used by reporters.
In a preferred embodiment, the chuck con
Among the objects of the invention is to pro
struction is made from a single tube, preferably
vide such pencil, of the utmost simplicity of con
struction, in which the worn lead can be ad
vanced to writing position in an instant, and re
main eiîectively gripped without local weaken
ing or breaking under writing pressure.
_Another object is to provide a pencil of the
above type, of extremely rugged and inexpensive
construction, made of few parts that are not apt
to become deranged or jammed in use.
In the accompanying drawing, in which is
J shown one of various possible embodiments of
the >several'features of the invention,
.
-
Fig. 1 is a view in longitudinal cross-section o
a complete pencil,
Fig. 2 is a fragmentary view on an enlarged
of brass, having an enlarged inner bore at the
sleeve portion I1 to telescope over _the lead tube
proper, and having beyond the -sleeve a bore
smaller than the lead, the bore being trans
versely cut at 21. to remove metal, for defining
the two arms 20 and being longitudinally-slotted 10
to afford the wide slots 26 which space the clutch
jaws.
The lead tube is also encircled by a collar 28
soldered, brazed or otherwise fastened thereto,
substantially midway between its ends, said collar 15
having an outwardly extending -fiange 29 serving
as a seat for one end of a coil spring 30 en
circling the lead tube. The pencil barrel I6 which
may be of vulcanite, enamelled metal or the like `
scale in longitudinal cross-section, taken on line - for its main length, has a tapered forward ex 20
2-2 of Fig. 1,- and with the lead removed,
`
tremity 3| which latter is preferably of sheet
Fig. 3 is a view similar to Fig. 2, showing the metal, the reduced rim 32 at the forward end
relation of the parts with the lead in writing of the barrel snapping in back of the shoulder
position,
l
ledge 25 on the chuck, as best shown in Fig. 2,
Fig.- 4 is a transverse sectional viewy taken on when the barrel is telescoped over the empty lead
25 line 4_4 of Fig. 3,
tube and its encircling spring 30. The shoulder 25
3
Fig. 5 is a sectional view on an enlarged scale,
showing the upper or sharpening end of the
ledge 25 thus acts as-a latch with respect to rim
32 and blocks removal of the lead tube and its
pencil, and „
associated chuck.
-Fig. 6 is a plan view of the Sharpener blank
shown positioned in Fig. 5.
.
Referring now to the drawing, the pencil in
cludes a lead tube I0 extending substantially the
entire length of lthe pencil having soldered to the
rear-end thereof the collar Il of a ferrule pre
senting an enlarged` cylindrical bearing i2. The
upper end of the tube III is closed by a plug i3
soldered or otherwise held in position. Tele
scoped over the upper extremity of the ferrule
4
sleeve I2 is a sheet metal cap or thimble AHl held
in position by friction and spaced at its lower or
skirt end I5 from the ferrule. The upper ex
tremity of the pencil barrel i6 is telescoped over
the sleeve i2, the skirt i5 of the thimble or cap
„ extending over the extremity of the barrel. The
lead tube has a chuck conformation at its for
ward end, unitary therewith, and preferably com
prising a separate sleeve il -soldered or brazed
over the tube iii. The chuck comprises prefer
ably a pair of jaw members i8 'and it at the
outer ends of arms 20 unitary with and protrud
ing forward from sleeve il. ‘Each of the jaw
members `is conformed at its inner face as a
cylindrical segment 2i struck on a radius smaller
55 than »the radius of the thicker pencil lead. At
the outer face each of the chuck jaws is enlarged,
presenting a forwardly and outwardly flaring
body 22 and a tip 23 tapered forwardly to a
relatively sharp rim 2l. A narrow shoulder ledge
60 25 is defined between the shank 22 and the tip
In the assembled pencil, the rear end of the
barrel is lodged as shown in Fig. 1, between the 30
ferrule bearing I2 on the lead tube and the skirt
i5 of the cap or thimble il, ‘while the shoulder
ledge 25 on the chuck resiliently holds the barrel
i6 in position. By drawing the barrel into the
thimble I4 against the resistance of spring 30, the 35
jaws I8 and i9 oi' the clutch are permitted to
separate, and the lead may now be readily in
serted. By then gripping the barrel and pressing
with the thumb on the thimble itl, the lead is 40
released and permitted to drop out to any desired
writing length, and upon release of pressure on
the thimble, the lead is retained in securely
gripped position, as best shown in Fig. 3, by the
blocking action of the rim 32 of the barrel against 45
the chuck. The chuck is thus retained by the
thickness of the lead 3l tov maintain the shoulder
25 somewhat spaced from the barrel rim, as
best shown in Fig. 3.
Since the inner radius of the `cylindrical chuck 50
jaws is less than that of the lead, it is clear, as
best shown in Fig. 4, that the lead will be engaged
only by the edges of the chuck elements, the main
areas of which elements are out of contact with
the lead. The grip is longitudinal, in the particu
lar embodiment shown, along four lines 33, '34,
35 and 36, parallel to the axis of the lead and ex
tending the effective length of the chuck. It is
thus clear that the lead engagement is well dis
2
2,134,570
tributed along longitudinal lines for an extremely
effective gripping engagement of the lead.
As compared with a construction in which the
lead is gripped peripherally, the gripped length
by the present invention is several times greater,
and, accordingly, the effectiveness of the hold is
improved even though a weaker spring be em
ployed. Moreover, by this arrangement, the en
gaged portion of the lead is reinforced and
10 strengthened, where with peripherally‘engaging
ing shall be interpreted as illustrative and not in
a limiting sense.
Having thus described my invention, what I
claim as new and desire to secure by Letters
Patent, is:
1. A pencil structure comprising a unitary bar
rel presenting a relatively sharp reduced forward
edge, a lead tube extending substantially the
length of said barrel, a coil spring within said
barrel encircling .said lead tube and urging the 10
latter away from the pencil point, said lead tube
clutches, the effectiveness of the hold might be
accomplished at the cost of locally weakening the , having a lead gripping jaw structure protruding
lead by indenting the same peripherally, and this beyond the rim of said barrel and having a taper
would lead to frequent breakage, especially under ing portion within said barrel engaged by the
15 the severe service to which this type of pencil is rim of the latter, said jaw structure presenting
commonly subjected.
While it is preferred to employ a chuck with two
jaw pieces, as shown, it is, of course, apparent
that it could be made with three or more such
20 pieces, each conformed to engage the lead sub
stantially along its edges, so that the main area
of the jaw pieces remains out of contact with
the lead.
It is also understood that the concave con
25 formation of the jaws need not necessarily be on
a circular cylindrical arc, but could be angular,
or of any suitable cross-section to afford the de
sired longitudinal, relatively sharp line of engage
ment with the lead.
Referring to Figs. 5 and 6, the pencil is illus
30
tratively shown with a simple lead Sharpener
attachment. For that purpose, a rigid disk 40 is
retained in the cap midway of the length thereof,
within a peripheral groove 4|. The lead sharp
85 ener may constitute a hardened steel blank 42
shown in Fig. 6,_ generally rectangular in form
with a generally hour-glass shaped longitudinal
aperture 43 and lateral tongues 44 near the op
posite extremities thereof, bent inward at right
40 angles and gripping tabs 45 protruding midway
from opposite extremities of the blank. The met
al of the blank, transversely creased at 46, is
inserted by its creased portion through a central
an external shoulder serving as a limiting stop
determining the uppermost position of the lead
tube in the barrel.
2. A pencil comprising a sheet metal barrel
presenting a reduced forward rim, a rigid lead 20
tube in said barrel having as a unitary part at
the forward end thereof- a pair of spaced arms,
each having an enlargement near its forward ex
tremity presenting jaws protruding from the rim
of said barrel, said jaws presenting longitudinal 25
edges to grip a lead, a coil spring within the bar
rel engaging the lead tube to propel the same
away from the point, said enlargements tapering
at the barrel enclosed portion to cause the rim
of the latter to draw the jaws together for longi 30
tudinally gripping the lead, said jaws each pre
senting an external shoulder serving as a limit
ing stop determining the uppermost position of
the lead tube in the barrel.
3. A lead pencil comprising a lead tube having 35
a pair of spaced rigid jaws presenting longi
tudinal lead gripping edges, each of said jaws of
concavity to be free from engagement of the lead
between said edges, said jaws having an inter
mediate peripheral shoulder and tapering toward
their upper and toward their lower ends, a sheet
metal pencil barrel encircling said lead tube and
presenting a reduced forward rim encircling the
tapering u_pper end of said jaws with the lower
aperture 41 in the cap. The fold or crease 46
becomes lodged in a central aperture 48 in the . end of said jaws protruding beyond said rim and
disk 40 and the lateral tongues 44 serve as stops
against the end wall of cap or thimble I4. For
sharpening, the lead is simply inserted through
the opening 41 and turned, so that the oblique
50 edges of the hour-glass shaped opening 43 serve
as cutting edges to produce the desired conical
point on the lead, before insertion thereof
through the chuck opening at the forward end
of thei pencil. If desired the cap can be removed
"Ji Si and held over the lead while in the pencil.
It is, of course, understood that the Sharpener
appliance, while desirable, is not an essential
part of the combination and that if dispensed
with, the thimble would be closed or equipped
60 with a removable eraser, if desired.
It will thus be seen that there is herein de
scribed vapparatus in which the several features
of this invention are embodied, which in its ac
tion attains the various objects of the invention
65 and is well suited to meet the requirements of
practical use.
As many changes could be made in the above
construction and many apparently widely differ
ent embodiments of this invention could be made
70 without departing from the scope thereof, it is
intended that all matter contained in the above
description or shown in the accompanying draw
said shoulder serving as a limiting stop between
said lead tube and said barrel and a coil spring
in said barrel reacting against said lead tube to
cause theinner tapered portion of said jaws to
be forced toward each other by the engagement
therewith of the lower rim of said barrel.
4. A pencil structure comprising a lead tube
having lead gripping jaws at the forward end
thereof, a unitary sheet metal pencil barrel en
circling said lead tube and presenting a relative
ly sharp lower rim, said jaws having means
thereon cooperating with the lower rim of said
barrel for forming a latch connection therewith,
and spring means tending to draw said jaws into
said barrel.
60
5. A pencil structure comprising a lead tube
having lead gripping jaws at the forward end
thereof, a unitary sheet metal pencil barrel en
circling said lead tube and presenting a rela
tively sharp lower rim,` said jaws having means 65
thereon cooperating with the lower rim of said
barrel for forming a latch connection therewith,
and spring means tending to draw said jaws
into said barrel, the external portion of said jaws
above said means having an externally tapering 70
portion.
JOSEPH MEILNER.
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