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Патент USA US2130778

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Sept. 20, .1938.
2,130,778
E. >o. RUBEL. l
MECHANICAL PENCIL
v"Filed Marçn_ 1'3, 1955
fb VA RD @ffl/BEL
BY
~
l
AT1-ORNE
2,130,778
Patented Sept. 20, 1938
2,130,778 `
‘ï fMEcHANIoAL PENCIL
l
'Eawara .0. Rubel, neçhesfe?; NJY. ‘
` _Applieatibn March`13, 1935, {Ser-iai -'Ñ0.f'»10^,870
"
’ ` "
-2 claims., (ol. ‘1205-179
@and af cömpressionspringM I 3 is interposed be
"f 'Tpisjjhvention relatesy m‘fmeehanica1`~penei1s
and has* for ‘its 'objecti to provide Va novel feeding
tween the Lflange I'Zfandfthe‘fixed partition 9 so
ing piîêsäiir'e against the lead or the-holder there
?iër'?i‘ber flrlrestinïgßagaìnst¿the-partition (i` to act
a-`s~to-~-`no`rmally` force the~~sleeve` 8 in the direc
mechanism forfsuch'a pencil which operatesftoV tiontovvard
the front of the pencil with the socket
fe'edïthe‘f-le'ad out of thegpencilby simply'exeri'.-l
as the'ïstòp for`_-the movement of the sleeve in this
of» to îforce ïtheï lead and its holder a short dis
tance -intófmthefshaftfgof the pencil-and then're
ferwardßdir‘eetion.
length» of “lead'fo'rced out ‘of the holder.
`.at»one»end and »is‘at-tached to the ratchet bar I6
with -its'other end.l The inner end -of thev‘lead
' f
“Thisfe‘andr other objectsl of thisinventíonjwill
beeoine more readily apparentl from the detailed
of the-pencilïengages into r`4the ¿lead holder I5
and the ~tube`~5 surrounds the lead except for the
. description thereof‘whîch follows, refereneelbeing~
hadto the accompanying drawing'lein'which
portion 'which isf fed Aout to Aproject therefrom for
`
Writing purposes.
~ Figure- 1' is »a longitudinal »sectional view of _the
15*
`
feeding ~ rod' _ I 4 Jïwhich- carries ` the lead holder I5
turn ¿toits> normalßposition with fan additional
ioA
t
Within fthe- sleeve -`Il is mounted to slide the
leasing it to allo-Wthe holder of the leadfto re
t
‘Behindjthel-fixadpartition 9 Within the shaft
Imofïthe pencil isñxedly `mounted to the shaft the
pencil and feeding mechanism, the section being
taken o‘n‘ the line 'eI-I in Figure 2;
e
`
holding-member ’I1 Which‘is provided with
r‘lë‘igïure 2‘is_'a cross 'section of the 'pencilpthe hollow
sf Ícïtio‘rrl being takenA on the line 2--`>2 in_-Figure' 1 an ¿extension I8 `havingja substantially hook
looking >in‘tlfie"direction of the arrow markedv A. shaped'endr |59` formedthereon.I The'sleeve 8 is'
20
surrounded ¿by tthe yoke f20ïand.~'2IJA.> The closed
endlof ï'this‘iyoke passes 4‘thru the hooked end I9 of
J*liligvureß ‘is Va cross 'section of thev pencil, Athe»
section being taken on the line`2>--2 in lFigure 1
looking `in `the. _direction'lo-f the arrow marked B.
the VAhòlding intiemberv |11 so' as Vto pivotally rock
thereinLïlTlfie- opposite end of the yoke 20 'carries
<1IïFig‘ure‘ális a longitudinal4 section of the -pencil,
thejsprìng «presse‘dfp‘awl --2I whichV `is adapted to 25
engage fth’e"riaItchet-»ït'eethI of `the ratchet bar I6.
»ther end's,- -the -`yoke' 20 is engaged by
<f""Figure `5 isva cross'se'c'tion of y'I'.he‘ïper‘icil; the Intermediate
se’cti'onbeing" taken on the line 5->-5 of Figure 14: the‘ïs'leeveîßïiby means of'the pin-»20A so vthat fas
‘i the section being taken on theiine ‘1_-‘4 or >Fig'
1;: Figure 6::i`s `a longitudinal’sectional view‘of >a -the .ratchet ’bar `is “forced towardfthe- rear of the
pencilfby the! sleeve »8 ‘the yoke 20 is rocked Vwith 30
, modified"formßofv the pencil. '
itsl‘ven'd 20B»‘pivota'lly` held in the“ hooked end I9 so
~ *Figure 7 is an enlarged longitudinal'sectional
that ¿the ïsprin‘gß pressed' »pawl '-21 isV swung rear
Wardlyssa‘ìdistance *substantially double that of
the> rearward 'ïmovern‘ent of r‘the ‘ratchet bar I6.
Thisfr'novïes ¿the 'pawlZI‘out ofengagement with 35
View of ‘the feeding: mechanism portionfof :the
pencilfillustrated in
Figure
l.
H
.
~
'
-
'
‘
¿nel the; several l `figures of `the drawing»` like «ref
' '. erence numerals indicatelliketpamts.l
one of theratc'hetïteethand.V into engagement
As illustrated in the several figures of the draw
thenextratehet tooth. The sleeve 8 is
ingïthe hollowfshank I ofthe penßilmay vremade behind
operated :toi'secure‘the movement of the pawl 2 I,
intl-.he `conventiorïial1form` ¿of mechanical pencils asf-aboveidescribedçîby:forcingthetube 5 or the
harina @tapered «from ;,2 ¿and` a »suitable Acap »3f portion of the lead which projects I'from it against
at.Y the.` rear thereof. _ The latter :iszremovableyto
uncover fthe „ eraser ¿II` -land` »is `used ` tot: provide` a
handle forthe `operationof the mechanism ingre
the `'Writingsurface-or any other `fixedïsurface so
as to have th'eLt'ubef-S move ïintothefpointed end
ofthe shaft of theïp'encil a distance substantially
equal lto_‘»halflthe'ïlength/of one of the ratchet bar
;The. feeding mechanism> of ‘fthe :pencil includes teethfso-ïthat Ia length] o'f-_l lead îs’fed out of the
. newinggthe leadúnthegpencil‘ as will hereinafter
bedescribed.-
,
*
f
,
l
_
thetube vor, pencil holder :5‘ which is :slidably
mounted. between. the-«tapered Vend `of the; pencil
and; fixed“ epartition, ` Iì :thru which ;it;cprojects‘rto>
`
`
have` the socketxmember‘TI'Ifastenedathereto..::A
s'leeverß inturìnis> fastenedlinto the socket einem.-y
be'ra :'I :which ‘sleeve extends thru- the `ñxed'parti'tion
Sfanda .yoke ` I0 is‘formed‘at’the end thereof in
whichlthefspri-ngpressed paWl I-"Igis A»journ'aled ~ '
'i "1A ‘fíîlal'r'rgwi |121 Iisl ’suitabl'yï fastened." to1 the outside
ofA êthe-*sleeve ‘f8 ‘ between "the ïfixed partitions f 6 Aand
tube“ Tas Willähe?eiïnafter ,bé described.
'
"Theispring'ff'pessedçpawl ßI‘I at the inner end .
offt'heftub'e' 8_ le‘ngfagesdone ofthe ratchet teeth of
the r‘ratche?? bar *so Q that when pressure is applied
against the ¿projecting 'end o_f the lead; the lead
cannot'beffo?cfedseparately-into the tube 5 but
Will’fonly lrnovefvvithfthe tube. When the ‘lead
and 4tube`Í-isç^i"o'rced to move into the shaft of the
pencil,` the ,spring-f I3 'is' compressed thereby so that
on thereleas'efòffthé Apressure »against the lead
2,130,778
and -tube this spring acts o-n the sleeve 8 and
moves it back with the tube 5 to its starting po
sition. During this return movement of the sleeve
the yoke 20 is swinging back toward the front
end of the pencil and duringthis movement the
pawl 2| thereof forces the ratchet bar ahead o-f it
so as to move this bar a greater distance than the
sleeve 8 is moved by the spring I3 .and thus forces
the feeding rod I4 to push an additional length
of the lead out ofthe tube 5. _, _ _
.
,
c
_
The lead may thusbe fed‘¿out 4of the tube 5
whenever it is desired by simply forcing "the tube
bar and the feeding rod with it until they have
reached their starting position in which the
spring pressed latch 35 snaps behind the shoulder
36 located at the junction of the ratchet bar and
feeding rod so as to temporarily prevent a return
movement of the ratchet bar and feed rod.
The sleeve 21 is then moved back into the shank
of the pencil by the cap 3 Without moving the
ratchet bar and feeding rod and after the sleeve
has reached its starting position it is given a 10
quarter turn to turn the ratchet bar and move
its' teeth back into engagement with the pawls
5 with the lead into the pencil shank and then, _ II _and 2I and lock the cap 3 onto the shaft I,
releasing it and this may be done until all "of‘ With the feed bar moved back to its starting
15 the lead has been used up and forced outîof theV ¿position a new lead is inserted into the tube 5
15
sleeve I5 at the end of the feedingrod,~V _The
until its end is forced into the socket sleeve
sleeve I5 serves as a collet for “the Iend o"f"the- -I5 land held inV place therein. The pencil is then
lead to grip the end thereofgand allow Lit ._to be¿ ready _to be used again. The annular shoulder 36
forced out thereof when the end of the sleevegw is provided with a longitudinal slot 31 and this
reaches the shoulder 23 and is stopped ’thereby
while the feeding rod _forcesthe end of the lead~
out of the sleeveto make _room for the insertion
of the end of ' a new leadpnthe refilling of the.,
pencil.
25.
3.0
_
_
Íjlw
_
feeding rod toward the front of the pencil where
_rod I4 toward the rear of. the pencil shaft until it; movement of the sleeve 21 back into the pencil
but slightly projects into the tube_~,5f_and the end Witnthe ratchet teeth of the ratchet bar out of
of the sleeve I5 thereofhas again- been-imoved engagement with the pawls I I and 2 I. To hold the
forward thereon into _the position illustrated in sleeve 21 in the position in which the ratchet bar
Figure l. The latter is accomplished by therenf - I6 is engaged by the spring pressed pawls II and
30
2I’,_-a_spring latch 50 yieldingly engages into the
washer 24 at the end of the- sleeve 8 sothat asl s1otj_32„until the sleeve is turned by force for the
the feeding rodisdrawn back4 into the pencil the; reloading of the pencil in order to cause the
additional movement of the feeding rod after. the latch to slide out therefrom and permit the end
sleeve has been stopped by the Washer-¿24 draws Wisexmovement of the sleeve 2_1 as above de*
35
the end of the feeding rod partially _out ofV the scribed. _» _,
sleeve I 5 to again provide a _socket fortheinser-ïV
In Figure 6 _1_ have shown a simplified form of
« ` _
¿the feeding rod I_4l and that ofthe ratchetbar
I6 to which it is fastened, the ratchet barv is dis-,.
engaged from thegpawls II> and 2I `by an axial
turn of the ratchet bar of 90 degrees.V Forthis
purpose the ratchet bar_is held betweenfthejaws'
45; 25 and 26 at theiend of Athesleeve 2_1;(se.el_Fig,-`~
ure 4) >while the sleevelis mounted to turn inthe.
bearing 28. <A 909’ circumferential slot 29 is prov-j.'
vided in the> sleeve21into which'- engages a suit
able key 30 projecting inwardlyof _thebearing -28
to hold thevsleeve againstendwisemovement in.
the bearingbut permit the'. quarter turn of'theÍ.
sleeve and the ratchet bar necessary'toV move the»l
ratchetteeth of the ratchet bar; >outof engage
ment with; the pawls II >and 2li.` The 'latter are>
_ held against turning, .one> directly -by the` hold‘-,
ing `member I1 and the-otherpindirectly. by the
engagement `of the hooked- shaped -end I9 of theA
extension I8 of this member intoa >suitable :lon-'_
gitudinal groove 3 I -in the outer_wall ofthe sleeve.
60 8 (see Figure 1).
_In giving the sleeve 21 alqvuarter turnîthe key..`
the mechanism in which the reñlling of the pencil
is secured by simply forcing the lead into the tube
4_0 so as to have its end force the feeding rod 4I 40
back into th-e shank of the pencil into the position
illustrated in- the figure. The feeding rod 4I has ‘
the »ratchet bar 42 attached thereto and the pawls
43 and 44 operate thereon to feed the lead out of
theytube 40 as described in connection with the 45
pencil illustrated in Figures 1 to 4. Before re
ñlling,fthe ratchet bar is given a quarter turn to
bringgits teeth out of engagement with the pawls
43 `and 44 and this permits the lead inserted into
the front of the tube 4U to force the feeding rod 50
41 -and the ratchet 'bar back to their starting posi
tion after which the ratchet bar is turned back to
have its teeth again engag-ed by the pawls 43 and
44 to operate the ratchet bar as described in con
nection with Figures 1 to 4.
said ‘sleeve-member and movable in and out there 60
of,1`a' spring pressed holding pawl carried by said
32 in the _side of the, s_leeveso as to permit the
sleeve to be moved longitudinally out- _of the rear
sleeve so as to move therewith and engage the
of the pencilby _means ofthecap 3. __During this=_
and thefeeding rod; I.4-¿ is moved `.with i-t -by the
engagement of the jaws,Y 25_,_and__2._6’behind the'v
annular shóulder"33>>l o_.cated` at
` _the upper end of»
70. the ratchet bar lli.V ¿This shoulder moves toward
theijawsas the leadis4 ‘fed out-.of the tube-:so that.
when _all the lead has been fed out ,of the tube
the` shoulder _.33` is _located substantially _behind
the jaws __25 and 2_6. _The movementof the _sleeve
55
-‘¿1.~"A mechanical pencil comprising a hollow
shank, a-¿sleeve member mounted to reciprocate
Within said shank, a ratchet bar projecting from
30 is brought in line with theylongitudinal slot
movement' of .essere 2`1 the ,ratchet bar i6,
75.
25
gagement of the end_of the sleeve I5 with `the
In order to permit the rearward movement of
65
turned back to feed the lead, the end of the
latch 3,5 can slide therethru past the shoulder
and _permit the movement of the ratchet bar and
The pencil vis refilled bydrawing _the feedingY before they were held back thereby during the
tion of the end of the leadthereinto;A
501
slot 'is/'located so that, when the ratchet bar is 20
tooth lon said ratchet bar to normally keep itV
against movement out of said sleeve member, a
yokevmo'unted Vto swing within said hollow shank 65
and'operatively connected with said sleeve mem
berfto. cause said yoke to swing in the direction of
m‘ovementof said sleeve member, a spring pressed
feeding ¿pawl carried by said yoke so as to swing
therewith and engage behind spaced teeth on said
ratchetbar, Va pencil holder movably mounted
in said shank and> forming a continuation of said
sleeve member with a portion of the holder pro
jectingfromthe end of said shank to provide for
21, as above described, thus _draws-the ra’_t_c_he_t`_`v` thejmovementof said sleeve member in onedi- 7l
2,130,778
rection by said pencil holder when pressure is
applied thereto to force the projecting portion
of the pencil holder into the shank so as to move
said sleeve member and swing said yoke to cause
5 its feeding ratchet to move over said ratchet bar
a distance greater than that of the movement of
said sleeve member and said pencil holder and
have said feeding pawl engage behind a ratchet
tooth at the end of its movement, and spring
means for returning said sleeve member and
pencil holder to its normal position and cause said
yoke to move its feeding pawl again a distance
greater than that of the returning sleeve member
3
and pencil holder so as to give said ratchet bar
a movement into said sleeve member and force
a portion of the pencil held in the pencil holder
out of th-e pencil holder.
2. A mechanical pencil as set forth in claim 1 Ul
including means for rotating said ratchet bar to
move its teeth out of engagement with said spring
pressed holding paWl and spring pressed feeding
pawl and permit a movement of said ratchet bar
away from said sleeve member for the insertion of 10
a lead into said lead holder.
EDWARD O. RUBEL.
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