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Патент USA US2137888

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Nov. 22, 1938.
Filed Nov. 18, 1935
3 Sheets-Sheet
Nov. 22, 1938.
w, w, J_ FULLER
Filed Nov. 18, 1955
3 Sheets-Sheet
Nov. 22, 1938.
v w. w. J. FULLER
mmns AND usmon FOR convnmma SPEECH INTO VISIBLE mmcn
Filed NOV. 18, 1935
j? 7
3 Sheets-Sheet '3
* mug
“L3 /_
Patented Nov. 22, 1938
Wallace Watt 1.‘ I’aller, Washington. D. 0.
Application November 18, 1988, Isshl Na. “.45!
ll Claim. (a. 170-1)
This invention relates to a method and means ouit,ortoaslgnalreleased.singlestroke sweep
for analysing the wave terms of spoken sounds circuit, as protested.
and- for causing those spoken sounds to make
a visible indication. The latter may be in the
s iorm of an illuminated letter. symbol, or word
sign, or on the other hand may be in the term of
a permanent printed record.
It is a well known fact that speech is a complex
phenomenon oi pitch or frequency diilerences:
10 volume, intensity or amplitude di?'erences: and
quality or number and relative strength 01' par
tials or harmonics or wave form diilerences. In
the sense of hearing, all three of these com
ponents, and the duration or time element of
15 each, are utilized for articulation or intelligibility.
It is an object of the present invention to pro
vide a method and apparatus for converting in
telligible sounds (primarily speech sounds) into
intelligible visible indicia and, in accordance with
20 this invention, I take into account all 0! the above
mentioned factors, whereas, in the prior art, as
far as I am aware, only the matter of irequency
ditlerences has been considered. For this reason,
no operative method oi, or apparatus for con
25 verting speech sounds into intelligible visible in
dicia have been produced, prior to my invention.
It is the primary object of the present inven
tion, therefore, to provide a method and means
for converting sounds into intelligible visible tom,
30 such as word signs, letters or characters, either
exhibited, illuminated or printed.
It is an object of the invention to provide a
method and apparatus which will make possible
the conversion oi’ speech sound into visible form,
35' for instance, to enable totally dear persons to
understand, visually. the spoken word. The in
vention, 0! course, is not con?ned to use by the
deal, as it is oi utility in converting speech into
a permanent printed record.
According to the pinciple of this invention,
speech sounds or- the like are ?rst converted into
a corresponding pulsating current, for instance.
by the use oi a microphone, a series of ?lters.
and an audio-frequency ampli?er. This current,
and an appropriate sweep circuit, control the
electron beam to trace a path corresponding to
the spoken sound. As is well understood, either
Instead oi using a conventional cathode ray
tube, in which the electron beam is projected
directly onto a ?uorescent screen, merely for s
the purpose oi illuminating the same, a special
type 0! target is provided in my invention. The
target is associated with the cathode ray tube,
in the path 01' the, electron beam, and comprises
essentially a mask provided with apertures of i0
novel type, as explained below, and means be
hind the mask adapted to be ailected by the beam
projecting through one or more oi’ the apertures.
The mask is provided with apertm'es posi
tioned thereon in accordance with a plurality of lo
diilerent patterns, each pattern corresponding
to the wave form or path traced thereon by the
electron beam when actuated or controlled by a
particular previously recorded sound.
method and apparatus or the present invention
a diilerent wave form on the mask. These curves
maybetracedbeiorehandbytheuseoi oil cov
ered photographic plate or by the discoloring oi as
the metal of the mask by the electron beam. One
or more apertures may then be drilled or other
wise i'ormed at convenient points ‘along each
curve, care being taken to avoid forming the
apertures where the diilerent sound traces cross to
one another, and to‘ avoid too close a spacing of
the apertures. For each sound trace, a diiler
ent position, number, size, or shape of- apertures
are provided.
Whenthe eleotronbeamisactuatedandcon- as
trolled by a predetermined sound, it will neces
sarily travel along the path previously recorded
be projected through the. aperture or apertures
positioned on that path, but through no other 40
Since, as stated, the‘position, number, size or
shape oi the apertures-are di?’erent, the eilect
feature of the present invention to provide means,
which may be 0! several. diilerent types, for utilis
electro-magnetic or electro-static means, that
is, coils or plates, respectively, or a combination
of both may be used to control de?ection. '?le
voice current circuit may be connected to one
pair 0! electron beam de?ecting plates or coils
oi’ the cathode ray tube, and the other pair oi
dicator. The ?rst, i'or convenience, may be
termed the “impulse system", the second, the
"charge accumulative system”. and the third, the se
plates or coils associated therewith may be con
55 nected either to a signal synchronised sweep cir
and actuate an apropriate visual indicator.
Three alternative ways are described below for so
utilising the enersy oi the electronbeam passing
through the screen to select and actuate an in
" ect fluorescent” or “direct illumination sys
In the first two systems, I position behind the
ticularly desirable in the charge accumulative
system, because means must be provided to re
ceive the successive charges projected through
screen a charge accumulating or conducting de
the screen.
vice, preferably, but not necessarily, in the form
of a Faraday cage. In the third, I position be
impulse system, or a simple plate of material of
The same device may be used in the
provided with visible lndicia, such, for instance,
high electron absorption coefficient may be sub
stituted. The mask should be insulated from the
conducting or accumulating member, and this
as stenciled letters or word signs.
insulation is accomplished by Spacing the mem
hind the mask a ?uorescent screen, preferably
10 - For each system,‘ a slightly different form of
bers apart and, if desired, connecting the mask
target mask is used, although all three are bas-'
ically the same. In the impulse system, each
wave form or path is provided with a plurality
to ground. The apertures in the mask should
of apertures which differ, from pattern to pat
15 tern as to their shape, spacing and/or number.
In the accumulative charge system the apertures
along each sound trace diiier as regards their
number or size, whereas in the third (direct il
lumination) system, only one aperture is provided
20 for each sound trace, and the apertures differ
from one another only in the matter of their
In the ?rst or impulse system, individual pulses
are applied to the conductor positioned there.
25 behind as the electron beam travels over the
apertures in the mask arranged on a particular
wave form pattern. These pulses are ampli?ed.
and may be used to actuate a high speed elec
have well de?ned, sharp edges.
Ii_a Faraday cage type of collector is asso
ciated with the mask, its front face preferably
is provided'with openings registering ‘with the 15
pattern‘ openings in the screen so that electrons
projecting through the openings can enter the
cage to be absorbed by the walls thereof, but so
that the electrons will be restrained from being
re?ected outwardly thereof.
In practicing my invention, it is essential that
all of the sound waves traced on the target start
from the same point and that all are released or
set in operation by the voice itself. Each sound
wave or trace will be different from the others. 25
and the apertures are so located on the difIerent
traces as to take advantage of these differences
trical integrator or indicator for actuating print
ing keys. Thus, each path traversed by the
most eillciently.
When the impulse system is used, the charge
absorbing and conducting element behind the 30
electron beam will create, in the circuit con
nected to the target, a series of unidirectional
screen may be connected through appropriate
ampli?cation to_a counter or indicator of the
pulses which are different from series to series
in the matter of their number, duration, or
35 periodic frequency or a combination thereof.
Indicators adapted to be controlled and actuated
by such pulsating currents are known in the
In the case of the cumulative charge system,
type used in teletype work or any other type of
indicator, adapted to be actuated by the num
ber, frequency and/or duration of the successive
40 the individual pulses imparted by the electron
beam to the charge accumulator behind the
mask, as a result of the passage of the beam
through the several openings on a particular
path, are stored 1m until the end of the sweep
45 of the beam for that particular sound. At the
end of the sweep, a circuit is closed from the
target to ground, and the potential of the dis
charge, which will be diiferent for each sound
pulses may be used. The charge absdrbing and
conducting member behind the screen in the
impulse system is so connected that the impulses
are registered on the indicator circuit immedi
ately as the electron beam traverses the pattern 40
and projects through the openings thereon.
In the case of the charge accumulating
method, the charges resulting from the projec
tion of the beam through the several openings
are stored up during the entire time that the 45
beam travels across the mask, and means must
be provided for discharging this accumulated
charge at the end of the travel of the beam, so
track pattern, is utilized to control the selection
50 of the appropriate indicator.
In the direct illumination system, the beam
will pass through only one aperture during its
that the current may be utilized to effect the
necessary selection of the proper indicating 50
traverse of a particular sound track. Positioned
behind the mask is a fluorescent screen. adapted
55 to be illuminated by the electron beam when it
passes through the mask. Since the spot of
illumination will be different for each sound
trace, the mask acts as a selector. At the points
on the screen, or on the end of the tube, corre
60 sponding to the spots which will be illuminated
by the beam, appropriate indicia, such as letters
or other characters are positioned, so that they
will be illuminated or indicated by the luminous
spots on the ?uorescent surface. Consequently,
65 a letter or other character corresponding to the
traces. adapted to close a circuit, by an appro
priate relay, so that the accumulated current
will flow from the collector to ground. By the 65
interposition of an appropriate resistor in the
last mentioned circuit, the potential drop across
it will be applied to an appropriate ampli?ca
tion circuit to control the indicators. Alterna
spoken sound will be illuminated by the elec
tron beam.
Thus, the spoken sound automatically con
trols the actuation of a particular indicating
70 means, so that a visual indication correspond
ing to it is made.
As stated above, when either of the ?rst two
ways is used, there is positioned behind the mask
a charge receiving device which may be in the
75 nature of a Faraday cage. Such a device is par
This means may comprise an auxiliary
electrode positioned at the end of the several
tively, I may use a relay tube interposed in the 60
beam sweep circuit to close the circuit from the
collector to ground when the current has risen
sumciently high in the sweep circuit to have
moved the beam all the way across the target.
with my invention, either of two circuits. 65
termed "sweep circuits" may be used to con—
trol the movement of the beam across the tar
get. The ?rst may be described as a voice re
leased sweep circuit, which consists of a circuit
adapted to cause the beam to make a single, rela 70
tively slow stroke across the target for each
sound. The second is a voice synchronized
sweep circuit, which is recurrent, i. e., similar to
the so-called sawtooth relaxation oscillation im
pulses. In this type, the beam makes a great 75
plurality of strokes across the target during each
sound. In the former, a constant period of time
is consumed by the beam during each traverse
of the target. In the latter. the sweep velocity
bears a de?nite sub-multiple relationship to the
voice frequencies.
The voice stroke, signal released sweep circuit
is preferable in certain cases, but it. must be un
derstood that my invention is not limited thereto.
A control electrode is located at the beginning po
sition of rest to which the beam is normally di
rected when no voice current is in the sound cir
cuit. When a current is impressed upon this cir
cuit, by the admission of a sound, the beam will
15 be de?ected by the detector plates or coils in the
cathode ray tube and will then be removed from
the control electrode. Such removal of the beam
will make a change in the current in a circuit
connected to that electrode, which, through an
20 appropriate thermionic relay, will start the op
eration oi’ the sweep circuit to move the beam
across the target. An electronic time delay may
be inserted in this circuit, e. g., a current limiting
tube, that is, one which draws a constant plate
current may be used to decrease or control the
sweep velocity if desired.
As is well known in the art, appropriate weak
couplings between the impressed voice currents
and the time base circuit may be used for "look
30 ing” or maintaining a relationship between the
in?nite number of variations in the number, fre
quency, and duration of impulses can be worked
out. As stated above. may electrical cir cults
and systems for receiving and discriminating be
tween electrical impulses are known in the art,
and the system described below is illustrative
only. Because of the shortness of the pulses and
of the intervals between the pulses, it is prefer
able that the electric circuit be of a nature as to
permit the functioning of the counter or indi
cator and/or to compensate for the time (actor of
the printing mechanism used. The circuit re
tains, delays or spreads out the pulses until such
time as the printer is clear and releases them at a
rate which mechanical keys can follow. I prefer 15
to use a gas vapor electron tube, of the thyratron
type. It is essential to prevent the interpreting
impulses from outstripping or getting ahead of
the time limitations of the particular high speed
counter or printing mechanism adapted to be 20
controlled thereby.
diagramatically a number of di?erent methods
and means for accomplishing the obiects of this
invention. It must be understood that the draw
ings are illustrative only, and are not restrictive
of the invention.
In the drawings:
Figure 1 is a diagrammatic view of one form of
the invention;
In the foregoing general description, mention
has been made of the use of a single electron
35 beam tube in connection with this invention, but,
Figure 3 is an enlarged detail at one end of the
cathode ray tube of Figure 2;
Figure 4 is an end elevation of the device of
for certain purposes, it is often desirable to use
Figure 3;
two or more such tubes connected in parallel. If
Figure 5 is an enlarged detail of a cathode ray
it is desired to make the apparatus capable of
tube which may be used in connection with the
indicating a great plurality of di?ering sounds,
method and apparatus of Figure 1;
40 it is of advantage to use a plurality of electron
tubes, each of which is provided with a screen
having the openings thereof arranged on different
patterns so that each tube controls a different
group of visual indicators and is adapted to be
45 actuated by a correspondingly different group of
Figure 6 is a circuit diagram of one form of the 40
Figure 7 is a modi?ed circuit which may be
used with the circuit of Figure 6;
sounds. In such a case, the beam of electrons
in each tube may move simultaneously along the
same wave form, for each sound, but the mask
Figure 8 is a diagrammatic elevational view of
an apertured mask which may be used with the
cathode ray tube;
Figure 9 is a circuit diagram of a modi?catron,
in which two cathode ray tubes are connected in
in only one tube will have openings corresponding
parallel; and
50 to each wave form, and that tube alone will be
operative to control an indicator.
Figure 2 is a diagrammatic view of a modifica
voice current and the rate of sweep or time of
horizontal traverse.
In the accompanying drawings, I have shown
Figure 10 is a diagrammatic view of a novel
printing mechanism.
Figure 1 shows one plan of arrangement of
the various elements of the invention. A tele
phone transmitter or microphone l is connected
to suitable ampli?cation 2, and thence to a ?lter
65 the beginning of a rather long sound, another
tube at the middle portion thereof, and if desired, or series of ?lters 3. A sweepcircuit l is inter
a third tube at the end of the sound. Each tube posed between the ?lter and the electron beam
has associated with it a screen having a plurality : tube 6. The cathode ray device may be pro
of patterns corresponding to sound waves of the vided with a metallic envelope, and includes hori
zontal plates 6 and vertical plates 1 which cause
60 type that will be traced thereon as a result of
Alternatively, the tubes connected in parallel
may be arranged in such a circuit that they op
erate in sequence so that one tube will operate at
the particular sounds which will control the
beams. Thus, the apparatus in accordance with
this conception. will be capable of taking care of
long and involved sounds. ‘
Although the accumulative charge system de
scribed generally above has certain desirable fea
tures, it is inherently limited in the number of
wave forms that can be analyzed, by reason of the
fact that the amount of the charge that can
70 be stored up in the charge accumulator is de?
nitely limited by the nature and size thereof, and
by the fact that the selection is based simply on
magnitude of charge. With the impulse sys
tem, the charge absorbing and conducting mem
75 ber imposes no such limitation, because an almost
de?ection of the cathode ray beam in two direc
tions. Thus, the beam will trace a wave form
path across an apertured mask 8. Positioned
behind the mask is a collector or conductor 9,
which, for instance,- may be a Faraday cage.
This is connected, through appropriate ampli
?cation Ill, to an indicator or printer II.
In the circuit from the ?lter 3 to_ the hori
zontal plates 6, I may provide, it desired. an
amplitude control device I! for the currents in 70
that circuit.
In the system of Figure 2, instead of using a
charge collector with the cathode ray tube, I
provide a ?uorescent screen I 3 and a plurality
of visual indicators i4, adapted to be illuminated 75
to make a proper indication. ls shown in I'll
ure 3. the inner surface of the end face of the
tube may be provided with a coating of ?uores
cent material is. such as calcium or strontium
tungstste. sine sulphate or the like. Ordinarily.
such materials are poor conductors. and in order
to increase the excited time life of the material.
it is desirable to compound therewith a good con
ductor to spread the ?uoreecence. Moreover. it
the sensitivity of the coating.
provide a plurality of visual indicia ll, which
maybeintheformof dark ?guresonatrans
luccnt ground or stenciled openings in a rela
tively opaque coat. These ?gures may be illu
minated directly by the ?uorescent material po
sitioned therebehind, or, small spots may be illu
minated immediately above or below each indicia.
ures 2 and 3 is provided with a plurality oi aper
turcs it, ll’. etc.. each being adapted to illu
minate a difi'erent indicia when the electron beam
projects therethrough. The apertures are posi
25 tioned so that one aperture only lies on each
wave form path adapted to be traversed by the
beam. Thus, only one indicia will be illumi
nated by each sound.
Referring to Figures ti and t, a screen adapted
tobeusedwiththesystemofFigurel isdis
closed. This screen has a plurality of openings
it, It’, etc., l1, l1’, spaced along the paths It,
it’, etc., adapted to be traversed by the electron
beam as controlled by different sounds. As
stated above. the number, sise, shape or spacing
of the openings along the paths are di?erent.
Consequently, the collector it. which may be in
the form of a Faraday cage It. will be subjected
to diflerent amounts, numbers, or frequencies oi
electron charges for each wave form path trav
ersed by the beam. These charges or impulses
are conducted from the collector by an appro
Driate circuit through appropriate ampli?cation
to the indicator or printer ii.
Referring to Figure 6, the microphone or tele
phone transmitter i is shown as connected to a
conventional resistance capacitance coupled two
stage ampli?er 28. A three-stage ?lter chain a
is shown connected to the output of the ampli
60 her but, of course. it must be understood that
the filter chain could precede the ampli?cation.
The number of ?lter units or elements shown in
the chain is arbitrary, as any suitable or desired.
number may be used. Although a particular
55 class of ?lter is shown. it should be \mderstood
that high pass, low pass or band pass ?lters may
be substituted.
In circuit with the ?lters and the cathode ray
tube. there is a sweep circuit 4. which, as shown
60 in Figure 6. is of the signal synchronised. re
current stroke type. This circuit applies elec
trical charges to the vertically disposed plates
to impart horizontal movement -to the beam, to
cause the beam to sweep longitudinally of the
The voice current is also applied to the
65 screen.
other pair of plates 0 to control the movement
of the beam in the opposite direction.
and are removed therefrom successively by the
?nal tube 2!. which also restores each tube suc
cessively to its former condition. These im
pulses, as discharged from the tube it. serve to
actuate a printing mechanism of any desired
type such, for instance. as shown in Figure 10.
Any equivalent circuit, adapted to perform the
general function of retaining the impulses. or of 10
accommodating the inherent time delay of me
chanical printing mechanism is suitable.
In the circuit of Figure 6. and interposed be
tween the voice circuit and the printing magnet
II, there is an appropriate electronic time delay 16
It. This device is adjustable so that a printing
impulse will be applied to the printing magnet
it through conductors It following a predeter
mined time after the initiation of current in the
voice circuit.
Thus, the circuit II is a time delay to permit the
individual impulses to be recorded on the print
ing device. so that the inherent time factor of the
mechanical printing device will be compensated
for and each impulse will have its proper effect
on the counter. The time circuit it controls the
printing impulse, and delays that impulse su?l
ciently to permit the printer to have been moved
to the proper position before printing. If sim
ple words are used, this control is super?uous.
Instead of using a separate circuit for con
trolling the printing impulse, that impulse may
betransmittedoverthesame circuitasthein
dicator selecting impulses by the use of a voice
synchronized motor. clutch driven series of cams
to distribute or direct the selection of a ?nal
path to the printing key of a particular sound.
In Figure ‘I, an alternative sweep circuit II is
shown. Such a circuit is a single stroke. slsnal
released circuit. In connection with this type of
circuit, one may use a control electrode I‘! (Fig
ure 8), associated with the mask I. when the
electron beam is caused to move of! of the control
electrode 21 at the position of rest by a current
?owing in the voice circuit. the tube It (Figure '1)
will permit the flow 0! current through the sweep
circuit, and as this current gradually increases,
the beam moves. relatively slowly. across the tar
get. When a predetermined potential has been
thus created in the sweep circuit, the beam will
have traveled all the way across the screen, and
the relay 31 will close. 'I‘hereupon, a printing
impulseotcurrentwill?owthroushthe wires as
to the printing solenoid It associated with the
indicator. Thevoicecurrent?owsintotbiscir
cult through wires It, connected to the horizon
tallydisposedplatesiotthe cathoderaytube.
Instead of using the relay TI to initiate print
ingimpulseattheendottbetraverseoithe beam
across the target,van auxiliary control electrode
11' (Figure 8) maybeprovided,andinsuch a
case, that electrode should be connected through
an appropriate time delay circuit, such as that
shown at ‘I in Figure 6 to the printing solenoid.
Figure 9 discloses a preferred manner in which
two_ormorecathoderaytubeslandl' maybe
An ampli?er or any means or device for accel
connected in parallel. In this diagrammatic i1
lustration, the signal input is represented at 40
and the sweep input at ‘I. The sweep circuits 70
l2, 48, associated with each tube may be adjusted
to work simultaneously: 0!‘ to 01m!" di?ercn
erating the electron motion may be used between
the cage and they ?rst tube in the circuit 1!. The
the same sound. Alternatively, one circuit may
provided in which the impulses from the Fara
70 day cage II are applied, successively to the grids
of a plurality of vapor discharge electron tubes.
known as a ring circuit, and impulses imparted
tiallysoastomakcadifierentwave tor-micr
operate subsequently to the other, by the inter
position of a switch in the circuit actuated b!
an appropriate electronic time delay device.
The term of printing mechanism. disclosed dis:
wave form path, the indicator corresponding to
the sound utilised to control the form thereof,
aminactuating said indicator to make said indicia
grammatically in Figure 10 has certain features
visi e.
for use with my invention. A printing drum ll
is loosely mounted on a shaft 4!, and is pro
vided with a coil spring l1 connected at one of
gible indicia corresponding to intelligible sounds,
comprising propagating such a sound, projectins
2. The method of producing a visible intelli
its ends to the hub 48 and at its other end to a
ment may be imparted thereto by the spring
pressed pawl 5| pivoted to the actuating lever 52.
A series of printing keys lit are mounted around
the periphery of the drum. Below the drum ap
15 propriate means are provided for supporting and
actuating, step by step, a printing ribbon 54 and
of visible intelligible indicators, selecting an in‘
dicator corresponding to said sound by selection
efiected by said wave form path on said target
stationary part, such as a builer 49. An annular to traverse a wave form path on said target cor
10 ratchet ill is attached to the drum, so that move responding to said sound. providing a plurality 10
tratzersed by said beam, and actuating said indi
3. The method of producing visible intelligible
a strip of paper it or the equivalent thereof. A Ti indicia corresponding to intelligible audible
vertically movable, two-position printing platen II sounds, comprising providing a target having a
is disposed beneath the paper. A cam ~or lug 81 plurality of active areas thereon, said areas be
associated with the drum ll is positioned to close ing arranged in accordance with a plurality of
contacts 58 when the drum is at rest and is in the wave form patterns corresponding to predeter
start position, as determined by the butler it mined audible sounds, propagating a sound,
and cooperating stop lug N. In circuit with the projecting a beam and causing the same to
contacts 58 is a solenoid it, which will raise the traverse a wave form path on said target, con
printing platen 58 when energized. The platen
has an inclined surtace or wedge 6| which will
control the position of the normally open spring
pressed contacts 62, in circuit with a magnet pr
solenoid ll, which is adapted to shift the posi
30 tion of lever 04 to disengage pawl II and locking
detent 85 to permit the spring 41 to return the
drum to start position. impulses-from the cir
cuit 28 or the equivalent are applied to the coun
tor-mechanism by conductors ‘I0, and through an
35 appropriate relay ‘Ii and battery 12, actuate the
counting magnet ‘ll. For each impulse thus im
parted, to magnet ‘II, the lever 52 will move one
stroke, and the drum, through the pawl and
trolling the term of said path by said sound to
substantially coincide with one of said patterns
on said target, and actuating an indicator cor
responding to said sound by energy transmitted
through the active areas 0! said pattern.
4. The method of producing visible intelligible 30
indicia corresponding to intelligible audible
sounds, comprising providing a target having a
plurality of isolated electron transmissive spots
thereon arranged in accordance with a plurality
of patterns, propagating an audible sound, pro
jecting a beam of electrons onto said target,
causing the same to traverse a wave form path,
controlling the form of said path by said sound.
and causing the same to substantially coincide
printing impulses, either irom conductors it of with one oi said patterns, and using the beam
the circuit of Figure 'l, or from the conductors of electrons encountering said transmissive spots
29, Figure 6, are applied to the printing solenoid 'on said target to select an indicator correspond
or relay 28 to actuate the lever ‘ll which depresses ing to said sound. _
ratchet mechanism 50, BI , 65 will be moved. The
the appropriate printing key 53, to print an in
dicia corresponding to the sound emitted. De
5. The method of producing visible intelligible
indicia corresponding to predetermined sounds,
pression of the printing key It results in a down
ward movement of the wedge BI and a closing of
the contacts 62. Thereupon, themagnet 63 is
energized and the lever 84 shifted to position to
disengage the pawl BI and detent 85, to permit
the drum to return to its original position. Such
action closes the contacts BI and energizes the
a wave form path corresponding to said sound.
masking said beam during a portion of said
path, and utilizing the beam during the un
masked portion of the path to control the selec
tion and actuation of a visual indicator corre
solenoid 60, whereupon the platen is shifted to
its upper position for a subsequent printing op
eration, and the lever “is shifted to permit the
detent and pawl‘li again to engage the ratchet.
Thus, the parts are in position for the next print
ing operation.
It must be understood that any well known type
00 of impulse printer may be substituted for the
novel one disclosed herein.
If it is desired to use an instantaneous volume
control in connection with thisinvention, a con
trol oi the type shown in United States Patent
No. 1,737,830 is suitable.
I claim:
I. The method of producing visible intelligible
indicia corresponding to intelligible audible
sounds, comprising propagating such a sound,
comprising propagating such a sound, projecting
an electron beam, causing the beam to traverse
sponding to said sound.
6. The method of producing visible intelligible
indicia corresponding to predetermined sounds,
comprising propagating such a sound, projecting
an electron beam, causing the beam to traverse
a wave form path corresponding to said sound,
masking said beam during a portion or its
traverse of said path and unmasking it during
another portion, providing visual indicators tor
a plurality of predetermined sounds, and select
ing the proper indicator corresponding to said
propagated sound by the beam during the un
masked portion of its traverse of said path.
7. The method of producing visible intelligible
indicia corresponding to predetermined sounds,
comprising propagating such a sound. projecting
an electron beam, causing the beam. to traverse
a wave form path corresponding to said sound, 70
70 projecting a movable beam, causing satd beam to
traverse a wave form path, controlling the form
masking'saidbeamduring aportion of its
or said path by said sound, providing a plurality
of indicators, each adapted to indicate a visible
indicia corresponding to an intelligible audible
76 sound, selecting, by means controlled by said
traverse oi said path and unmasking it during
other interrupted portions and thereby causing
an intermittent projection of said beam beyond
time or said beam during the unmasked portions
causing said beam to traverse a wave form path
to control the selection of an indicator corre
corresponding to said undulating current. a plu
rality of visual indicators corresponding to a plu
sponding to said sound.
8. The method 0! producing visible intelligible
indicia corresponding to predetermined sounds.
comprising propagating such a sound. projecting
rality oi said sounds, and selector means con
trolled by the beam in its traverse oi said wave
form path to control the actuation of one of said
indicators corresponding to the sound producing
said undulating current.
12. Electron control apparatus comprising, in
maskingsaidbeamduringaportionoi’its trav
10 erseoissidpathandunmaskingitduring other combination, means [or projecting a beam of 10
electrons. means ior causing said beam to tra
interrupted portions and thereby causing an in
termittent projection oi said beam beyond the verse-a wave form path and (or controlling the
mask, and utilizing the number or duration or contour of said path. an electron absorber posi
frequency oi‘ the projections oi’ the beam during tioned to be encountered by said beam. and a
15 the unmasked portions of the path to control the mask interposed between said source and said
selection of an indicator corresponding to said electron absorber, said mask being imperlorate
throughout the major portion oi its area and
9. The method oi producing visible intelligible ’ having a plurality oi’ holes therethrough, said
indicia corresponding to predetermined sounds. holes being arranged to coincide with a path or
comprising propagating such a sound, projecting predetermined contour traversed by said beam
an electron beam. causing the beam to traverse a of electrons under the control of said means.
wave form path corresponding to said sound. thereby to eilect projection oi said beam through
masking said beam during the major portion of the holes in said mask and the contact thereoi
its traverse of said path and unmasking it at a upon said absorber.
13. Means for converting speech sounds into
single de?nite point in its path and thereby caus
visible indicia comprising means for projecting a
ing a single isolated projection of said beam be
yond the mask during its traverse of said path. beam of electrons, means for causing the beam to
traverse a di?erent path for each sound, a screen
and utilising said projection oi said beam to con
trol the selection of an indicator corresponding in the ?eld of said beam oi’ electrons, said screen
having a plurality of patterns oi’ periarations
to said sound.
10. The method oi producing visible intelligible thereon. each pattern coinciding with a particu
an electron beam. causing the beam to traverse
a wave iorm path corresponding to said sound.
indicia corresponding to predetermined sounds,
comprising propagating such a sound. molesting
an electron beam, causing the beam to traverse
a wave form path corresponding to said soundI
masking said beam during the major portion of
its traverse of said path and unmasking it at a
single de?nite point in its path and thereby caus
ing a single isolated projection of said beam be
yond the mask during its traverse oi said path,
and utilizing said projection of said beam to il
luminate a ?uorescent area to make visible an
indicia corresponding to said sound.
11. An apparatus for converting intelligible
sounds into visible intelligible indicia comprising
45 means for producing an undulating current cor
lar path. a plurality of indicators and means so
tuated by the projection of said electron beam
through said screen to select an indicator corre
sponding to the pattern traversed by said beam
and to the corresponding sound.
it. An apparatus ior converting sounds into
visible indicia comprising a microphone. means
for ?ltering and amplifying voice currents con
trolled by said microphone, a cathode ray tube,
circuits for controlling the projection oi the elec
tron beam therein as to amplitude and time, a
perforated screen associated with said tube. a
charge selector positioned behind the screen. and
a printing device adapted to be controlled by said
charge selector.
jecting a iocussed beam 0! electrons, means for
rasent _ lio u 2.157.888 e
llovnaber 22, 1938 .
It is hereby certified ‘that the name or the patenteelin the above mm
. bored patent was erroneously Irittenandprintedas "Wallace Hatt I‘ m
ler" whereas said name should have been written and printedaswailaoe H.
Fuller, as shown bythe records oi‘ this office; andthat the said letters
Patent shouldbe read with‘this correction therein thatthe same may eon
rorn to the record oi'_the ease in the Pateht Office.
. signed and sealed this llith day or February, MD. 1939.
Henry Van Arsdale .
Acting Cosmissioner of Patents.
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