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Патент USA US2403736

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My 9,19%
v J. w. MCCLARAN
2,403,736
STRIP CIPHER DEVICE
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Filed Nov. 28, 1932
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2 Sheets-Sheet l
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BY
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.mséaxm.
ATTDRNEY
July 9, 194.6.
J. w. MOCLARAN.
2,403,736 '
STRIP CIPHER DEVICE
Filed Nov. 28’ 1932
23%
2 Sheets-Sheet 2
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; BY
FIKLOIRTHI‘KLGHAD
ATTORNEY
2,403,736
‘Patented July 9, 1946‘
UNITED" STAT est PATENT clerics
s'rmr oirnnn DEVICE
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WZJ'McClaran;UnitedStatesQNavy _'
ApplicationiN‘ovember 28, 1952, qSérial-No.'644,-723l
7 Claims.
(cits-#2)
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bets incwhieh theiletters ‘are inLthe same sequence,
asishownini Figured, The :ends of. each strip. are
This. lnvention'relatesi to‘ a device for‘ coding
and; decoding messages and. is‘ of the type‘em
connected together by the connecting element
ployingfa plurality of ‘ strips-‘each with one or ‘more
shown in'Figurese3, ‘Land 5 that ‘has a substan;
tially tubular body portion 2 I ‘ in which .is formed
a longitudinal slot‘ 2.2.. A hook‘ 23‘ is connected
‘complete alphabets thereonearranged at random,
‘ all‘ the alphabets on any‘ strip having the same <
sequential order, and‘ipr-ei‘erably with‘ a different
to spring: 2am the body 2! which tends to draw
thelhookttowardnthe body member. A knob‘ 25
istconnectedto the "spring'iand hook ‘to move the
adaptedwto produce ai-largeinumber ofhighly» com 40 hook away from the body toirelease the hook from
engagement with analphabet strip.‘ A resilient
plexecipher combinations without‘ any sequence
loop 26 haslaterally turned ends 21 that pass
in the‘ arrangement of the “letters that is * discov
through holes in theside of body member 2|, the
V erableby one- who has ‘not 1theke'y‘thereto.
loop being disconneotible from, the body member
‘ With the aboveand other objects ‘in view‘;_the
sequence of letters ‘on the various strips.
‘7 ItPislthe' object-of this invention to provide
a-lmachinelof ‘the character mentioned that? is
in thels‘ides of the loop. until the ends
invention consists in the construction, combina (i5 byqpressing:
2‘! clear-the body member, and the loopis then
‘ti‘on-and arrangement- offparts as will befherein
withdrawn. At the hook end of body membertzl
“is-ta;- lug’; 218;‘ thatextends oppositely to knob 25
with respect to ‘body member 2|, The strip 20
Figure‘ l" ‘is a perspectiveview‘o my‘ invention;
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after‘morefullydescribed;
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In the-drawings?
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Figure‘Z-i‘s'a bottom p'lan‘vie ‘ hereof;
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20 haswaqlooplat each end, one of which is engaged
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Figures 3; 4‘fand‘5‘ are respectively'atop plan
view, a side 'elevatiom‘and" an end “elevation of
‘themeans used‘for connectingtlie ends‘ ofthfe
strips’ that -carryftheealphabetyf
Figure v6 is afde'tai'l-view of portions of‘an'aIpha
bet strip;
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Figure-7 ' shows an interrupterforicovering'cer
tainof'the strips if‘de'sired';
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Fig: 8‘ is‘ a plan "viewer the inventionywith parts
broken away; illustrating the method of “ use.‘
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The general-construction of my invention is
shown in Figures 1 and 2. Feet Hi; which’ are
preferably ?exible, ‘rubber vacuum * cups, carry a
tby hook 23~and the other by loop 26 and the strip
isikeptr-taut by spring 24.
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Spaced [rom the‘ under sideof. plate I 3» is a
guide rod-leextending parallel. to each longitudi
133i]! ‘edge; ofthe plateand ,havingtwo ends secured
to, brackets: 14 and 15. An‘ aligning bar 30 is-slid
‘ably mounted; oniguides Z'Qland has a ‘notch in
eachen'drto receive a legiof ball 3 I‘, the1bail being
- sufficiently resilient to permit bending it to re
movethe: legs thereof from the slots‘ inthe align
i-ng bar; The endszofbail 3| ,a-re'ipivoted' at the
rear ends ofllthe ‘members H and a spring 32 ‘is
connectedtoeachl‘leg'of the bail andfto the adja
nected‘ by a cross brace-12L Plate-I3~~has1anupper
bracket»v I4‘ secured to each of‘two- corners" and
a‘elower :bracket‘ l5l?-xed to each of- theother-two
cent upright itlun'der stress to tendto move the
‘bail, and with it the aligning bar 39, toward the
‘upper end‘l'of platel3. A stop 33>is fixed on each
guide zeta limit the downward movement of
corners thereof, the brackets l5 b‘eing'attached
tomem'bers H and‘thev brackets“ being fastened
" A‘v slide 34 is mounted to move over'the upper
frame-"comprising longitudinal membersitcon-v _
to- uprights I 6’ that “are pivotally connected to the , ‘
>members1 l I to“ permit the disconnection of mem
ber: is .from bracketswlll‘so‘ the device may be
foldedi,
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At‘the lower‘end of plate I33 is a‘seriesorinde
pendently rotatable pulleys l1‘ mounted-‘on arcomi- a
mon; shaftiand each having, an outwardly extend
ingw?ange‘; I8; preferably‘ knurled, that. may ‘be
grasped: by‘the thumb and fore-?nger of the op
aligning bar‘SDi
surface-of plate !3 and has in it a slot 35 through
which one letter on‘ each strip 20 may be seen
and thus defines a row of letters extending trans
versely of'plate l3} A‘ groove 36 is formed in slide
:34 ‘to ‘ ‘receive “ an interrupter‘ 31 having cut-away
portions 38'through which the letters onjsome of
the strips 2!]- maybe seen and solid‘ portions-‘39
to cover certain other strips‘
As many inter
rupters may be used as are desirable each of
erator'jzo rotate: the ‘pulley. ‘T An equal number: of 50 which has a different, arrangement Iof cut-away
pulleys I9, also independently-rotatable, are idis- t;
portions 33“ and solid portions 39' to leave some
,posedrat the ?ipper-end of: plate, l3 with pulleys
of the. strips visible and cover other strips in any
I ill-aligned with corresponding pulleys I 1,, where
byar?exiblestrip r2ll~maybe passed aroundv the
‘plate l3 and over ‘arpulley‘ at each end. thereof.’ ,
‘Each strip 2?=hasroni it-preferablytwo alpha- .5
combination.
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While but one strip 29 is shown in‘posltion on
the device-it is to be understood that there may
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2,408,786
be as many strips used as desired up to the full
number of pairs of pulleys l1 and IS.
The method of operation is as follows:
Before beginning the coding of a message the
bail 3| is drawn toward the operator which moves
aligning bar 30 downwardly. The bar 30 is dis
posed to engage the lugs 28 on the strip connect
ing members and when further downward move
art, such as settingthe letters of the message
when coding on a line other than that de?ned by
slot 35 when slide 34 is in its lowermost position,
etc.
It will be understood that the above descrip
tion and accompanying drawings comprehend
only the general and preferred embodiment of
my invention and that various changes in con
ment of the barzis ‘prevented by stops 33, all of
struction, proportion and arrangement of parts
the lugs 28 will be aligned and the ?rst letter in 10 may be made within the scope of vthe appended
the alphabet sequence on each strip will be dis
claims without sacri?cing any of the advantages
posed under slot 35 in slide 34. The operator
of mv invention.
then rotates the pulley I’! at the left-hand side"
’ I claim:
of the device to turn the ?rst letter of the mes
1. In a device of the class described, a plate,
sage to be coded into position under slot 35, 15 supporting
means therefor, a plurality of grooved
then the second pulley I‘! to bring the second
pulleys at one end thereof, an equal number of
letter of the message into position under the slot,
grooved pulleys at the other end thereof, each
the third pulley I‘! to bring the third letter under
of the last mentioned pulleys being disposed to
the slot, and so on until each strip is so positioned
coact as one member of a pair with a pulley at
that a letter thereon forms part of a word of the 20 the other end of said plate and having an out
.message in a line visible through the slot 35. Slide
wardly extending ?ange whereby the pulley may
34~isthen moved up along plate l3 to any desired
be rotateda plurality of ?exible strips passing
position at which a line of letters will be visible
around said plate and over a pulley at each end
through slot 35 but inasmuch as the random se
thereof, resilient means connecting the ends of
quences on the strips 20 are different, the letters 25 each strip and having an outwardly extending
then visible‘ in slot 35.will not spell any word of
lug, each said strip having on it two alphabets
the. message. As shown by way of example in
one above the other in the same random sequence
.Figure‘ 8, the strips 20 have been moved to spell
but the sequence. on each strip being different
the words “Fleet sails today” under slot 35; the
.from that of any other strip, a slide movable
‘Slide is then moved up say thirteen letter spaces, 30 longitudinally of said plate having aslot through
and the meaningless sequence
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which a letter on each strip maybe seen, an .in
terrupter insertable in said slide, to cover selec
tively any desired strip or strips, and means slid
able longitudinally of saidrplate vto align all of
DHIMORUHFHCI U VZ
appears through slot 35 as shown in the dotted
line position of slide 34. This is copied as part
said lugs.
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'2. ‘In a device of the class described, a plate,
supporting means therefor, aplurality of grooved
of the code message, Another line of letters that
spell the succeeding part of the message is then
set under slot 35 when the slide is at the lower
end of the plate. ‘The slide is then moved up say
thirteen letters and the code sequence recorded.
pulleys at one end thereof, an equal ‘number of
grooved pulleys at the other end thereof, alplu
rality of ?exible strips passing around said plate
and overa pulley at each end thereof, each said
- To decipher the message, a device must be
strip having on it two alphabets one above the
other in the same random sequence but the se
quence on each strip being different from that
used having strips bearing the same random se
quences as the strips on the coding machine with
the strips arranged in the same transverse order.
The ?rst letters of the message equal to the num 45 on any other strip, a'lug carried by each strip
ber of strips used are then set so that the letters
of the code message appear in slot 35 with slide
~34 at its lowermost position; the slide 34 is then
moved up on plate l3 until there appears in slot
35 a sequence of letters that spell words in plain 50
language,‘ which are recorded as a part of the
decoded message. This is continued until all the
letters of the coded message have been converted
into plain language. vIt is apparent that the per
in the same relative position, a slide movable lon
gitudinally of said plate having a slot through
which a letter on each strip maybe seen, an
interrupter insertable in saidslide to cover se
lectively any desired strip. or strips, and means
slidable longitudinally of said plate to align all
of said lugs. ~
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3. In a device of the class described, afplate,
,a supporting frame to hold said plate in position,
son who decodes the message must have a key 65 a plurality of grooved pulleys at one end thereof,
to inform him ‘as'to the arrangement on the ma
an equal number of grooved pulleys at the other
chine of the sequences used in coding.
The coded message may be rendered still more
complicated by the use of an interrupter or vari
ous interrupters under the slot 35. For exam
ple, in coding one message, or a part of one mes
sage,ran interrupter having a space to leave visi
ble the ?rst three strips, to cover the next ?ve
.strips, to leave visible four strips, to cover three
strips and to show the remaining ‘strips, may be
used,'and for a subsequent message, or part‘ of a
message, an interrupter that would have, a dif
ferent arrangement of cut-away portions and
end thereof, a'plurality of flexible strips passing
around said plate and over a pulley at each end
thereof, each said strip having on it two alphabets
60 one above the other in the same random se
quence, a slide movable longitudinally of said
plate having a slotthrough ‘which a letter on
each strip may be seen, and an interrupter in
sertable in said slide to cover selectively any de
sired strip or strips.
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4. In a' device of the class described, a plate,
supporting means therefor, a‘ plurality of grooved
pulleys at each end thereof, a plurality of ?exible
solid portions may be inserted in groove 36. In
strips passing around said plate and over ‘a. pulley
this case it is of course necessary that the person 70 at each end ‘thereof, each said' strip having on
who decodes the message must know the arrange
it an alphabet arranged in random sequence,
ment of the cut-away Portions and solid portions
but, the sequence on each strip being different
in the interrupter used in coding the message.
from that on any other strip,‘ a slide movable
Various other means of complicating the code
longitudinally} of said plate having a slot through
will suggest themselves to those skilled in the 75 ‘which a letter on each strip may be seen, and an
2,403,736
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interrupter insertable in said slide to cover se
lectively any desired strip or strips.
5. In a device of the class described, a plate,
supporting means therefor, a plurality of grooved
pulleys at each end thereof, a plurality of ?exible
strips passing around said plate and over a pulley
at each end thereof, each said strip having on it
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each end thereof, each said strip having on it
an alphabet arranged in random sequence, means
to move all of said strips simultaneously to‘ a
predetermined initial position and means to de
?ne a transverse line across said plate.
'7. In a device of the class described having a
frame, aligning means comprising parallel guides
at opposite sides of said frame, a straight edge
an alphabet arranged in random sequence, means
slidably mounted on said guides, a bail pivoted
to move all of said strips simultaneously to a pre
determined initial position and a slide movable 10 at its ends to opposite sides'of said frame and
longitudinally of said plate having a slot through
which a letter on each strip may be seen.
engaging said straight edge to slide the straight
edge on said guides and resilient means tending
to hold said bail at one end of said frame to main
6. In a device of the class described, a plate,
tain said straight edge at said end except when
supporting means therefor, a plurality of pulleys
at each end thereof, a plurality of ?exible strips 15 moved by an operator.
JOHN W. MCCLARAN.
passing around said plate and over a pulley at
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