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Патент USA US2412265

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Dec. 10, 119%.r _
v
H. s. HAssELQUlsT
„
2,412,265 _
MECHANICAL PENCIL
_
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VFiled Jan. 19, 1944 l
,
2 Sheets-Sher#v l
Dec. 10, 1946.
y H. s. HASsELQuls-ij
' v2,412,265
MECHANICAL PENCIL _.
Filed Jan. 19, 1944
`
2 slwets-_sheetY 2
INVENToR.
696015.’ ?’assfz n@0/57". _
BY
Y Afro/gwn’
Patented Dec. 10„ 1946
2,412,265
UNITED -sTATlaz's PATENT ¿ol-‘FICE
2,412,265 ’
` MECHANICAL PENCIL
Hugo S. Hasselquist, Oak Park, Ill., assignor to v
Joseph Dixon Crucible Company,- Jersey City,
N. J., a corporation of New Jersey
Application January ’19, 1944, Serial N0. 518,825
i0 Claims. (C1. 12o-1s)
1
.
,
AThis invention relates to mechanical pencils of
the propel,- retract type.
the clutch and ejector at the extreme end of the
The invention has for its salient object to pro
vide a pencil that is simple, practical and rugged
in construction, comprises a minimum number of
Fig. 3 is a transverse sectional elevation .taken
substantially on line 3_3 of Fig. 2, looking‘in the
parts, is economical to manufacture, efficient in
Fig. ‘l is a fragmentary sectional elevation illus`-=
operation, and is so constructed as to materially
reduce the amount of metal and number of metal
ner of assembling the tip and spiral therein); Í - ’
feeding and ejecting positions thereof; .
'
direction of the arrows;
`
’f `
trating the `front end of the barrel and the manè.
parts required for its manufacture.
Fig. 5 is an enlarged transverse-sectional eleva
lAnother object of the invention is to provide 10 tion taken'substantially on line 5--5 of Fig."- 2,
a pencil of the character described with a new
looking in the direction of the arrows;
and improved clutch and ejector assembly so
Fig. 6 is a transverse sectional elevation taken
constructed and so mounted that the clutch will
substantially on line 6--6 of Fig. 1, looking 'in-the
not become fractured or distorted in use.
direction of the arrows;
- ‘
` ‘
Another object of the invention is to provide 15
Fig. 7 is a transverse sectional elevation utaken
a clutch and ejector assembly so constructed and
substantially on line 1-1 of Fig. 1, looking in' the
arranged that the ejector will always be properly
direction of the arrows;
centered in the clutch. ‘
-
v « »
Fig. 8 is an elevation, partly in section, ofthe
magazine, illustrating the manner of assembling
‘Another objectl of the invention is to provide
a' clutch and ejector assembly so constructed and 20 the channel tube in the magazine;
-'
arranged that the ejector controls the positioning
Fig. 9 is a side elevation of the clutch'and
of the clutch and prevents rotation thereof with
out necessitating coaction between the clutch and
Fig. 10 is a top plan View of thestructure shown
ejector;
channel.
`
g
k
in Fig. 9; and
4
' Another object of the invention is to provide 25
means for frictionally retarding the retraction‘of
>
'ï' '
'
"
"
‘»
--
"
"
Fig. 1l is a sectional elevation showing the rear
or cap end of the pencil shown in Figs. 1 and 2.4r
The invention ‘briefly described consists of na
mechanical pencil comprising a barrel and a body
novel, enìcient, and easily assembled mounting
30 member which, as illustrated, also consists" of a
for the tip in the barrel.
magazine having longitudinal grooves in its outer
Another object of the invention is to provide
periphery for storing leads. The magazine is'ro
a novel, eñ'icient, and easily assembled mounting
tatab-ly mounted in the barrel but has a cap ‘se
for the spiral tube and tip in the front end of the
cured thereto at the rear end thereof by means of
the clutch.
Another object of the invention is to provide a
barrel.
'
l which the magazine can be rotated.
Another object of the invention is to provide C19 CA ` .A spiral tube or a tube having a spiral slot ex
a simple and en‘icient spiral tube mounting and a
tendingA throughout .the length thereof is ñxedly
mounting constructed to frictionally engage and
secured at «its front end in a tapered member or
retard or brake rotation of the ymagazine or body
sleeve which is also used .to expand .the rear end
member.
'
-
.
"
`
‘
Another object of the invention is to provide
40
of the tip into frictionally tight engagement with
fthe front end of lthe barrel. The rear end ofthe
a magazine or body member with a channel mem
»spiral .tube has mounted .thereon means such asa
ber so mounted therein as to permit a frictional
disk or washer and the spiral is stretched between
slippage between the magazine and channel mem
the ñxed forwardend thereof and the rear end so
45 that the Washer frictionally engages the rear end
Further objects of the invention will appear
of the magazine or body member.
from the following speciñcation taken in con
A `clutch tube is mounted in the spiral and is
nection with the drawings which form -a part
provided with a lug which extends into the spiral
of this application and in which
`
slot. The clutch tube houses an ejector which
Fig. `1 is a longitudinal sectional elevation of 50 projects through a longitudinal slot‘in the clutch
a pencil constructed in accordance with the in
tube and h-as an elongated rearwardly extending
vention, the clutch and ejector -being illustrated
por-tion which is disposed in a channel formed in
_at the rear end of the barrel or in their initial
the channel tube secured in the magazine or body
feeding positions;
, `
member. The front end of the Vclutch tube is pro.
Fig. 2 is a view similar to‘Fig. 1 but illustrating 55 Vvided withy tapered spring` lingers vwhich v are
ber.
'
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2,412,265
4.
extends through the slot 48,-and a rearwardly ex- t
adapted to engage the lead as the lead is held in
the clutch and fed thereby.
tending elongated portion 55 which, as shown in
Figs. 1 and 2, extends into the channel 56 formed
in .the channel tube 25. This channel might, if
Means is provided in the pencil for positively
limiting .the forward movement of the ejector dur
ing its ejecting action and also for positively lim
iting the forward movement of the clutch.
Moreover, special means is also provided for re
desired, be formed in the inner wall of the body
memberV or magazine 2|. The ejectorean be in
serted through the slot 48 after .the clutch tube
has been completely fabricated and the lips have
tarding the retracted movementJ of 'the clutch
been folded inwardly.
~
after the lead has been ejected.
Attention is called to the fact that the elongated
Further details of the invention will appear l0
>end 55 of the plunger, by reason of its engage-V
from the following description.
ment in the channel 56, maintains the plunger 53v
In the particular embodiment of the invention
centered
in the clutch tube 45. Moreover, atten
illustrated, the pencil comprises a barrel 20 in
tion is also called to the fact that the lug 41 does
which there is rotatably mounted a body mem
not extend through the spiral slot in the tube 30
ber 2| which forms a magazine, the body mem- Y
into the channel 56. ' The clutch .tube >53 iskept
ber being provided with a plurality of longitudi
from rotating by reason of the portions 54 and 55
nally extending grooves or channels 23 in its outer
of the ejector engaging the walls'of the slotl 48
periphery for storing leads 22. A cap 24 is fric
and r.the channel 56.
tionally secured to the rear portion of the maga
It will be noted from Èthe showing in Fig. 2 that
zine or body member 2| and by rotating the cap 20
the magazine is also rotated.
~
the bend 58 in the ejector engages the liange '32'
to limit the -operative orhejecting movement of
'
As shown ‘in Fig. 8, the magazine or bodymem
ber .2| has secured therein a channeled tube v25. `
The .tube 25 is freely rotatable in the member 2|
the ejector. When the bend 58 engages the liange `
32 the elongated end or .tail 55 of the plunger
. with the exception »of the rear «end thereof which 25 rests on the outer surface of the spiral tube -3|),
thus preventing the ejectorfrom being forced off
is slit at 21 opposite the channel 28 and is ex
panded sufliciently in the member 2| to provide a
center and against the inside ofthe .clutch tube. '
The forward movement or operative movement
of the clutch is limited by means of a Vmember
` friction ñt therein whereby -rotation of the mem
ber 2| causes the .tube 25 to rotate. This friction
30 interposed between the front end of the sleeve
drive for the channel tube, clutch and ejector pre
vents .damage to the pencil from overdrive.
3| and the tip 33. This member consists of an
annular ring or sleeve 6U which is rotatably
A spiral tube 30 Ior a tube having a spiral slot
mounted in the portion 34 of the tip andis pro->
vided with a flange having tapered'resilient ñn
35 gers 6| which frictionallyengag'efthe outer> sur
face of the clutch .tube l45'. As vthe clutch tube
therein is mounted in the body member and tube
25. The frontend of the «spiral .tube 30 issecured
in .any suitable manner in a tapered sleeve 3| hav
ing aflange 32.
.
_
A tip 33 is secured in the front end of the barrel
and has a rearwardly extending cylindrical por
moves forward into the tip 33, the -lug >41 will
engage -the flange and carry the .ring Y6i) which
has a limited axial movement forwardly into
the
tip until the portion 62 engages ythe inner
40
tapered sleeve 3 | , kas shown particularly in Fig. 4,
surface of the tapered portion 6.3 ofthe tip
is assembled by forcing the vsleeve into the slitted
33. As the ejectorandclutch are retracted, the
rear end of the portion 34 of the tip, thus forcing
tion 34,having inwardly extending slits 35. The
this'portion of the tip laterally into tight grip
ping engagement with the inner wall 36 of the
forward end of the barrel 20. Thus Vthe forward
end of the tub 3.0 and the rear end of the .tap 33
are eiîectively assembled in .the forward end of
the’barrel.
»
`
The open rear end of the spiral .tube 30 has ,
mounted thereon va disk or washer 38 having a
D-shaped opening 39 therein, as shown in
6.
The washer engages the rear end of the magazine r
or body` member 2| and the tube 30 is stretched
between the fixed f-ront Vend `thereof _ which is dis
posedV in the sleeve 3| and the rear end and the .
rearvend of the tube is ñared, as shown :at "4|,
The disk or washer 38 is thus held "in frictiona'l
engagement with lthe magazine orbody member
2|.
'
'
clutch is retarded .initsretractive movementY by
the ñngers 6|. DuringV this retractive move
ment the ring 60 ,moves backwardly in the por
tion 34 of the tip until the rear Vedge thereof
abuts against the front edge of the >'sleeve 3|.
The axial movement of the ring 60 lis -provided
only to the extent necessary toinsure free rota
tion of the ring.
'
'
l
'
'
The cap 24 may be of any desired construction ì
butis preferably formed in the manner shown in
Fig. Y11 in which the cap „as shown comprises a
cap >tube l0 havingY a tapered rear inner surface
1| adapted to receive a removable cap 12; `¿One
end of the cap 'l2 has secured therein an eraser
13. The disk 38 overlaps the rear ends of the
storage grooves or channels 23, thereby retain-l'
ing the leads 22 therein. However, whenithle cap
’ The clutch is illustrated particularly in Figs. 60 is removed, the leads 23 can be lifted and then
9 and 10 and comprises an-elongated'ftube45¿hav
ing tapered »or inwardly concaved fingers Y46 Aat
the frontend thereof which engage and friction-` ally hold the lead which isfed4 bythe clutch. »
- Between 4its ends the «clutch tube-45 is provided ‘Y
with a laterally projecting lug 41. The clutch`
tube >45 has »a longitudinally extending slot 48
and the rear end of the tube is slit transversely,
as shown in Fig. 9 at 449, .and the upper portion
«ofthe wall of theltube is bent inwardly, as shown
>at 50 and 5|, .these portions forming a stop :5_2 for
limitingY the rearward movement of the ejector.v
The ejector comprises a'l‘ongitudinally extending
elongated .plunger 53 which. iis .disposed inilthe
clutch tube 45, a Llaterally'bent portion .54 which
withdrawn longitudinally from the »storage chan
nels or grooves.
`
'
y
'
y
From »the'foregoing*description it will be evi
dent that a simple and practical mechanical pen
cil has been designed and that the pencil de
scribed is capable -of accomplishing the objects
set forth in the outset of the specification. As
hereinbefore explained, positive ¿limits for the`
forward movement _of vthe ejectory and clutch Yhave
been pr-ovidedV and> these parts havevbeen so de
signed as to provide «a rugged construction in '
Awhich the ejector isr utilized to actuate the clutch
during >its operative and retractive movements.
The method of assembling the„spiral andjltip
to `the barrel are simple, practical and `effec»
5
afiiaeés
tive and permit the assembling of these parts
at a minimum cost.
Although one specific embodiment of the inven
6
.
6. In a mechanical pencil, a barrel, a member'
rotatably mounted therein, a channeled tube
mounted therein and having a friction fit adapt
tion has been particularly shown and described,
ed to permit relative rotational movement be
it will be understood that the invention is capable
tween the tube and member in which the tube is
of modiñcation and that changes in the construc
mounted, a spiral tube mounted in said ñrst tube
tion and in the arrangement of the various co
and ñxed to the barrel, and lead feeding means
operating parts may be made without departing
in the spiral' having means extending through
from the spirit or scope of the invention, as
the wall of the spiral tube into the channel
expressed in the following claims.
10 whereby rotation of the member in the barrel will
What I claim is:
cause the lead to be fed through the spira1 tube.
l. In a mechanical pencil, a barrel, a tip having
7. In a mechanical pencil, a barrel, a magazine
its rear end secured in the front of the barrel,
member rotatably mounted in the barrel, a cap
a spiral tube in the barrel, and means secured to
frictionally engaging the rear portion of the
the front end of the spiral tube for securing the 15 magazine member whereby rotation of the cap
tip in the barrel.
will rotate said magazine, a spiral tube in said
2. In a mechanical pencil, a barrel, a tip hav
magazine member fixed to the barrel, said maga
ing its rear end secured in the front of the bar
zine member having a longitudinal internal chan
rel, a spiral tube in the barrel, and tapered
nel, and means in said spiral tube arranged to
means secured to the front end of the spiral tube 20 coact with the spiral and channel and feed the
for securing the tip in the barrel.
lead as the cap and magazine are rotated.
3. In a mechanical pencil, a barrel, _a tip hav
8. In a mechanical pencil, a barrel, a, chan
ing its rear end secured in the front of the bar
neled member rotatable therein, a spiral tube in
rel, a spiral tube in the barrel, and means se
said member iixed to said barrel, a tip at the
cured to the front end of the spiral tube and dis 25 front end of the barrel, said tube having a spiral
posed in the rear end of the tip for spreading
slot, a clutch in said tube having a lug extending
the said end of the tip laterally and securing the
into said spiral slot, and means for frictionally
tip in the barrel.
engaging said clutch and having a portion en
4. In a mechanical pencil, a barrel, a member
gageable by said lug to limit the forward move
rotatably mounted therein and having a longi 30 ment of the clutch into the tip.
tudinal internal channel, a spiral tube mounted
9. In a mechanical pencil, a barrel, a, magazine
in said member, means securing the front end
`therein rotatable in the barrel, a spiral tube in
of said tube to the front end of the barrel, and
the magazine ñxed to the barrel, and a disk on
means on the rear end of the tube frictionally
the rear end of the spiral tube held against rota
engaging the member, said tube being held under 35 tion thereon and frictionally engaging the rear
tension between the front and rear ends thereof.
5. In a, mechanical pencil, a barrel, a member
end of the magazine.
10. A clutch and ejector unit for a mechani
cal pencil comprising a clutch tube having an
rotatably mounted therein and having a longi
tudinal internal channel, a spiral tube mounted
elongated slot adjacent the rear end thereof, the
in said member, means securing the front end of 40 slot being closed at its ends, and an ejector com
said tube to the front end of the barrel, means on
prising a plunger insertable through said slot, an
the rear end of the tube frictionally engaging the
angular portion extending through the slot, and
member, and means in said tube coacting with
.an elongated portion outside the slot substan
said spiral and channel to feed lead through the
tially parallel to the plunger in the tube.
tube.
45
HUGO S. HASSELQUIST.
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