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Патент USA US2613646

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Oct. 14, 1952
Filed Dec. 4', 1950
3 Sheets-Sheet 1
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Oct. 14, 1952
Filed Dec. 4, 1950
3 Shee_ts-Sheet 2
Oct- 14, 1952
3 Sheets-Sheet 3
Filed Dec. 4, 1950
P16. 8
Patented Oct. 14, 1952
I M. 2,613,545
Daniel weumnn' von Biamen‘iczky,
- Elinhurst,‘ N. Y.
Application December 4, 1950,’ Serial No. 199,058
' B?laims.
This invention relates to a pencil sharpener
and has .ior itsobject to provide, an improved
means for ‘sharpening the leads of pencils.‘
It is another object ofI the invention to’ pro
vide a‘. pencil lead sharpener’wherein the lead
of support
l’ on2 its
. ‘Sup
port 2 and ca'p'l formv support unit A. docket
of the pencil will be sharpened‘ to a perfectly
portion of socket vIll is formed ,inthe shape’ of
a bulging cylindrical head ‘8 and is supported
I0. is projected through said aperture ii and
is tiltable within the support 2. The upper end
concentric conical point automaticallymand to
eliminate the need for a careful, continuous,
even and steady pressure when sharpening
where skill is a factor to get a truly concentric
on theTcapl by ,a shoulder t’. The socket It
is universally tiltable on..the seatviornied by
10 said aperture on top of saidfc‘apv 5.] The diameter
of .the aperture I" in theca'pIi is much larger
It is another object of the invention to pro
vide a pencil lead sharpener wherein the abra
sive tube is universally ,tiltable so, that it‘ will
yield to the pressure of the lead before the
thanfthe" externalr'diameteliof the. socket. iii.
The socket I0 is centrally bored to receive pen
oil 6 and the‘ lower end’thereof ‘has an inner
is circular groove,v in which is disposed a freely
breaking point of the lead is reached and where
rotatable resilient pencil grip ring‘ i2 made of
by along lead, such as used by photon'etouohers,
rubber. The bore of socket it is larger in di~
ameter than the diameter of pencil t and the
can be sharpened.
insidediameter of grip ring ii‘. is smaller in
diameter than the untapered portion of the
It is still another object or" the invention to
provide a pencil lead sharpener wherein. the
abrasive tube is made so" that the abrasive cloth
can be easily inserted into the abrasive tube
and retained without. gluing and vwherein the
cloth can be easily andv quickly‘ replaced.
pencil 6.. Inside the upper portion of the head
8 there is a soft rubber grommet l. for pro
tecting the lead 4 ‘when inserting or withdraw
ing .the‘pencilB intosor out of the socket iii.
Adjacent the aperture of ‘cap I ‘is a ?xed split
It is still another object of I the'inve'ntionvto '
retaining ring 9 to prevent the withdrawing
of‘v‘socket 10 from ‘cap |. Outside the lower
provide a pencil lead sharpener‘ wherein the
lower end of the socketrneans is provided with,
means to wipe the lead’free from-the graphite
end portion of socket lilthereuis a collar ll
dust automatically when withdraQwingthe ‘pencil
For a better understanding of the invention,
reference may be had tothe following detailed
description taken in connection withpthe ac
'frictionally and axially movably. secured thereto.
- Grommet-Lhead 8, ring Q, socket‘ iii, collar ii .
and grip ring I2 constitute a tiltable socket unit
B which is universally tiltable-relative to the sup7 port unit. The support unit (I, 2) is preferably
companying drawing, in which?
made of aluminum and the socket unit (1, 8, 9,
Fig. 1 is a vertical sectional view taken on I
I0, I I) maybe made of aluminum or plastic ma
line 1-! of Fig. 2;
terial with the exception of the soft rubber grom
Fig. 2 is a top planned view of a iorm‘oi the
met ‘I’ and grip vring l2‘ which are made of rubber
invention shown in Fig. 1;
material. Tube I1 is of cylindricalshape and is
made of metal or, plastic material. Adjacent its
Fig. 3 is a sectional view similar‘. to
a modi?ed form of the "invention;
40 upper end is an external annular groove 18'_ . The
Fig. 4 is an enlarged side elevational view of
the lead Wiping parts;
inner wall of the tubell is abraded at l8 with
the exception of a narrow strip it at its upper
end. Thestrip l?'issmooth and is ‘of the same
diameter as the abraded surface it of the tube
Fig. 5 is a fragmentarjsectional viewtaken
on line 2—2 of Fig. 6 and of
still ‘further
form of the invention;
Fig. 6 is a top planned viewfoi the ‘form. of
11.. The strip IE will limit the grinding action so
All parts are circular and concentric‘ gen
that the leadwiu not be eaten up. ‘At the lower
e‘nd‘of the tube‘ H is small annular groove it"
in which is’ ?xed a frustoconical funnel £95 inade
erally throughout the construction of the sharp- -
in this instance or a?exible rubber material and
the invention shown in Fig‘. 5.',
‘ .
ener. The parts which are'tiltable are vco-axial 50 'throughlwhich pencil‘ ?lings are dispensed; In
the upper groove 18' of tube I‘! is a'resilient rub
when in their inoperative position with‘ one
another and are co-axial with the ?xedxand 110m
‘ber tube formed into the shape of a ring “May a
In Fig.
1, there is shown a v cylindrical
' '
v tube
resilient split metal ring l5 whichis disposed
within the rubber-tube ring it. - The outer pe
support 2, a cylindrical cap l secured on the
riphery of tube ring it lies in an annular groove
3’ of a split resilient metal ring 3. Ring 3, tube
it in rotation the rubber ring [2, but this ring
[2 is not necessary to make the sharpener work.
The ring [2 may be an integral part of the socket
ring I4, ring l5, strip l6, tube l'l, abrasive surface
l8 and funnel l9 constitute abrasive unit C. The
abrasive unit C is supported in the support unit
l0 and of hard material so that it will not grip
A by means of ring 3 which is axially adjustable Li the pencil 6, whereby pencil 6 will rotate as it
on the inner wall of support 2. The ring 3 is fric
does with the loose rubber ring [2.
tionally retained in its adjusted position and be
The automatic movement of the pencil 6 around
comes practically an integral part of support 2.
its own axis is not due to the roughness of the
With the exception of ring 3 the other parts of
abraded surface l8 of tube ll. This surface may
the abrasive unit C are universally tiltable ‘rela 10 be smooth yet the pencil 6 or a straight rod will
tive to the support unit A and ring 3. Cup 5 is
be automatically rotated in the same manner.
removably secured to the lower end portion of
In Fig. 1, the pencil 6 may be dropped into the
support 2 and serves to‘ collect the graphite ,v socket l0 because the bore of the socket l0 and
abraded from the pencil lead. The pencil lead
the bore of grommet 1 are larger in diameter
sharpener is assembled as shown in Fig. 1. This
than pencil body 6. The rubber ring [2 will
pencil lead sharpener is for sharpening the long,
cushion the gravity impact of the pencil 6. The
leads of re?llable pencils of the type used by
rubber ring [2 may either grip or not grip the
draftsmen and photo-retouchers. Fig. 1 shows a
pencil body 6. If it does grip, the pencil body 6
pencil lead sharpener especially for the use of
will be secured within the socket 10 against axial
photo-retouchers. Photo-retouchers use a long 20 displacement with respect to the socket l0 but
protruding lead from the tip of the pencil, about
two inches long, and they sharpen. the tip of the
lead to a ?ne conical needle point. ,
easily removable therefrom.
To sharpen the lead of these pencils, Fig. 1, pen
cil body 6 is projected into the socket l0 and is -
The lead 4 is long, the longer the lead 4 pro
trudes from the tip end I3 of the pencil body 6,
the more easily it breaks, however, this fact is
compensated by requiring less force to tilt the
abrasive tube l1 and the socket Ill, due to the
mechanical advantage of working on the long
slightly pushed downward into the rubber ring
I2. The rubber ring 12 will grip tapered tip l3
of the pencil body 6. The inner diameterv of the
arm of the levers.
socket is greater than the diameterof the pencil
In Fig. 3, there is shown a modi?ed form of the
body so that the pencil with ring [2 can freely .30 invention wherein the lower half of my pencil
rotate therein. The socket I0 is taken hold of ‘
point sharpener is di?erently constructed from
at the upper end by its head 8, with the ?ngers
that shown in Fig. 1. The view is taken in ver
and thumb of a hand without touching the pen
cil 6, and thus a tilted circular movement is im
tical section. The upper part of socket 20 is the
same as socket ID in Fig. 1. The bore of socket
parted to the socket loin respect to the support
unit so that the lead 4 of thepencil 6 tilts the
abrasive tube l l by pressingagainst the abrasive
surface l8.
20 is larger in diameter than the diameter of the
pencil body 6, except that the lower end of said
bore is smaller in diameter than the diameter of
‘the pencil body 6 and is thus adapted for receiv
ing the tapered end of the pencil body. At the
The maximum tilting of the tube I1 occurs
when the collar I I of the socket I 0 abuts the inner
Wall of support 2 as shown in Fig. ,1. This maxi
lower end of socket 20, there is attached and held
securely by sleeve 2 I, oppositely positioned resil
mum tilting of the tube l1 requires less force
than is required to fracture the lead 4 of the
pencil 6. The force required to jtilt the tube 11
depends on how much the rubber ‘ring I4 is
ient metal strip wiping arms 22 and 22' which ex
tend downwardly beyond the lower end of socket
compressed between the grooves of ring 3 and
tube [1, and also of the positionv of the collar H
which is axially tightly adjustable on the socket
I 0 for selecting the proper angular degree of a
maximum tiltability for both the‘ socket l6 and the tube l1 and thus predetermine the force avail
able to tilt the tube 11. Accordingly, there is
little chance of the lead becoming broken due to
any excessive side thrust.
The circular move
ment of the socket I0 ‘is self-guiding and because
of the centrifugal action, the pencil moves out
wardly so that the lead 4 touches the abrasive
l8. Since the pencil is free in the socket, it can
rotate. Accordingly while sharpening the lead 4
of the pencil 6 in this manner, the pencil 6 is
rotated around its own axis automatically about i
once for every ?ve or more complete circular
movements of the socket l0 without skill and an
The lower ends of the arms 22 and 22' are
bent inwardly and upwardly. The upwardly bent
portions are apertured respectively to hold wip
ing ?ngers 23 made of resilient soft material, The
lower end of the wiping ?ngers 23 yieldingly touch
the lead 4 of pencil 6 as the pencil is lifted from
the socket. Cylindrical tube 26 has an external
annular groove 26’ lying a considerable distance
down from the upper end of the tube as compared
with groove l8’ of tube l‘! in Fig. 1. Tube 26 has
an internal, upwardly and outwardly slanted
groove 26" at its upper end and on the lower end
it has an upwardly and outwardly slanted wide
groove 26"’. An abrasive cloth 28 is secured re
movably to the inner wall of tube 26 with the
upper end of said abrasive cloth 28 wedged into
the upper groove 26". A split resilient metal ring
21 of substantially triangular section is remov
ably ?tted in the lower groove to retain the lower
end of the abrasive cloth upon the inner surface
‘of the tube 26 and the upper periphery of funnel
65 [9 in the bottom of groove 26”’. The abrasive
ring [2 with thelower end of the socket and‘ ' cloth 28 is usually cut in the shape of a parallelo
the upper portion of the pencil body with the
gram and formed into a cylindrical tube and
upper portion of socket base causes the rotation
snugly ?tted on the inner wall of tube 28.
of the pencil with the socket. Since the pencil
A resilient split metal ring 24 has a circular
rotates around its own axis, the socket I0 does
shoulder 24' on its upper end and is axially and
not have to be absolutely co-axial with the abra
frictionally movable on the lower portion of the
sive tube I‘! to give a concentric point which
wall of support 2. A second resilient split metal
means that expensive accuracy in fabricating this
ring 25 is axially and frictionally movable on the
pencil sharpener is not essential. -When the‘pen
inner wall of ring 24 and its upper end is pro
cil 6 rotates around its own axis it carries with
vided with an enlargement 25' thereby forming
absolutely concentric vlead point is obtained. The
bearing of the lower end of the pencil through
a groove for holding rubber ring M. This groove
can be adjusted as to its height by the axial ad
justment of ring 25 relative to the ring 23. The
outer periphery of the rubber ring l4 lies in the
groove formed by the rings 24 and 25 and in the
tube groove 26’ whereby the tube 26 is universally
end of the socket for loosely supporting the lead
end of the pencil for free rotation with respect to
the socket and an abrasive surface carried by said
support for engagement by the pencil lead, where
by as the said socket is tilted and rotated the pen
cil is free to rotate within said socket and to roll
tiltably supported. By being able to adjust the
over said abrasive surface.
2. A pencil lead sharpener as de?ned in claim
1 and a tube containing said abrasive surface on
its inner surface and resilient means for connect
height of the groove formed by the rings 24 and
25, the rubber ring l4 may be more or less com
pressed and thereby the force required to tilt the
ing said tube to the support for universal tilt
ing movement upon engagement of the pencil lead
with the abrasive surface while the socket with
the pencil contained therein is being tilted and
3. A pencil lead sharpener as de?ned in claim
tube 26 can be adjusted as desired. The universal
tiltability of the tube 26 in Fig. 3 and tube IT in
Fig. 1 converts in effect the cylindrical abrasives
of said tubes into a frusto-conical abrasive sur~
face. Smooth strips it at the upper end of tube
26 in Fig. 3 and tube IT in Fig. 1 serve to prevent
2 and abutment means on the pencil socket en
the lead 4 from being cut off or eaten up by the
gageable with the support to limit the outward
abrasive H! in Fig. l or the abrasive 28 in Fig. 3
movement of the socket.
when sharpening the pencil lead. Strip it will
4. A pencil lead sharpener as de?ned in claim
also indicate when the lead 4 has been sharpened, 20
1 and a tube containing said abrasive surface,
because any further sharpening will have no e?ect
said tube having an external groove, said support
since the upper part of lead 4% will slide around
having an internal groove opposing the external
the smooth strip i6 and hold the tube H in Fig.
groove of the tube and a resilient tubular ring
1 and tube 26 in Fig. 3 tilted and the point of the
extending between said grooves and supporting
lead would have no chance of passing against the
the abrasive tube in a resilient universally tiltable
abrasive and the socket may have reached the
limit of its tiltability as determined by the collar
5. A pencil lead sharpener as de?ned in claim
||. Strip IS in Fig. 1 and in Fig. 3 happens to
1, and a tube containing said abrasive surface.
have the same diameter as that of the abrasive
ring means adjustably mounted on said support,
I8 in Fig. 1 and that of the abrasive 28 in Fig. 3,
said ring means having an internal groove, said
and therefore, the strip l6 will be effective only
tube having an external groove lying opposite the
when the lead 4 is very short.
internal groove in the ring means, and resilient
In Fig. 5 there is shown a driving gear arrange
means lying between the grooves of the ring
ment for tilting the socket 3|. A bevel gear 35
means and the tube to tiltably and resiliently
has a handle shaft 38 secured eccentrically and on
support said abrasive tube.
which tubular handle 40 is freely rotatable. A
6. A pencil lead sharpener as de?ned in claim
circular retainer 39 is fastened to the end of the
5, and said ring means comprising two rings rel
shaft 38 to retain the handle 40 thereon. A sleeve
atively adjustable to each other, and said ring
support carries shaft 36. The bevel gear 35 is ro
tatable on the shaft 36 and is held in place there— 40 means providing the internal groove of the support, the rings upon being adjustable and serv
upon by a circular retainer 3‘! ?xed to the end of
ing to compress said resilient means whereby to
the shaft 35. A cap 30 is ?tted on the upper end‘
alter the force required to tilt the tube.
portion of support 29. This cap has an upwardly
'7. A pencil lead sharpener as defined in claim
extended circular neck 30’. Bevel gear 33 rests
on the top of the cap 30 and is freely rotatable 45 1, and gear driven cam means rotatable upon said
support, said socket having a ?ange engageable'
on the neck of the cap 30. A cam pin 34 is eccen
by the cam means to universally tilt said socket;
trically fastened upon and upwardly projects
8. A pencil lead sharpener as de?ned in claim
from the top of gear 33. Gear 33 meshes at right
1, and said top portion having a neck portion
angles with gear 35. Socket 3| is radially out
wardly ?anged at its upper end as indicated at 32 50 surrounding said guide opening, a gear rotatable
about said neck portion, said gear having a cam
and this ?ange rests on a cam pin 34 as the gears
member, means on the support to rotate said
are rotated socket 3| will be tilted relative to the
gear, said pencil socket having a ?ange onits top
support 29. The handle 60 is turned to thereby
portion, said gear cam being engageable with said
rotate gear 35 and which in turn rotates gear 33.
Cam pin 34 rotates with the gear 33, but will not 55 ?ange, whereby as the gear is rotated the pen
cil socket will be tilted and cause the pencil lead
rotate socket 3|. Cam pin 34 merely slides on the
to be moved in a circular path over the abrasive
under side of ?ange 32, keeping the socket 3| uni
versally tilted, thus imparting to the socket 3| a
wobbling movement. The pencil body 6 will be
sharpened in the manner as above described.
While various changes may be made in the de
tailed construction, it shall be understood that
such changes shall be within the spirit and scope
of the present invention as de?ned by the ap
pended claims.
appearances crrnn
The following references are of record in the
?le of this patent:
I claim:
1. A pencil lead sharpener comprising a support
having a top portion with a guide opening there
in, a pencil socket carried by the top portion and
suspended downwardly through the guide open 70 2,540,320
ing, said pencil socket loosely ?tting said guide
opening to permit free tilting and rotary move
ment thereof, said socket being open at its lower
end through which the lead end of the pencil may
be projected, pencil-receiving means on the lower 75
Price ___________ __ Feb. 21, 1893
De Lisle _________ __ Feb. '7, 1939
Dessonnaz _______ __ May 20, 1941
Cayo ____l _______ __ Feb. 6, 1951
. Date
France __________ __ Feb. 15, 1933
Switzerland _____ __ Oct. 31, 1946
. '
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