Year: 1887

page_text: Date of Application, 13th Apr., 1887
Complete Left, 11th Jan., 1888
Complete Accepted, 17th Feb., 1888
I, WILLIAM T. BARNARD of "Montebello" Baltimore in the State of Maryland
United States of America, Gentleman, do hereby declare the nature of this invention
to be as follows:-
My invention relates to acoustic or tone telegraphy, and has for its object the
simultaneous transmission and reception of a number of independent messages over
the same line circuit and it consists more especially in the combination and arrange-
ment with a number of independent transmitter sconnected with the line circuit, of one
or more acoustic receivers, also connected with the line, and resonater analizers for
selecting the independent messages, as more fully explained hereafter.
1 am
aware of efforts having been made by other inventors to increase the
capacity of a single line wire for telegraph purposes by the employment of tuning
forks, vibrating reeds, and other suitable devices for originating at the end of a line
wire a series of vibrations, electrical impulses or waves so as to give rise at the distant
or receiving end of the line to musical tones, the intention of such receivers, generally
stated, being that the musical tones thus originated and thus transmitted should be
received by those acquainted with telegraphic codes as telegraphic messages. I am also
aware of the fact that by existing means the number of commerical or practicable
messages simultaneously originated and transmitted over a single wire by means of such
musical tones or electrical vibrations have been quite limited, as also of the obstacles
other inventors have encountered in their endeavours to increase the number of
separate sets of vibrations or series of signals that could be received at the distant end
of the line, so as to enlarge the number of commercial messages thus simultaneously
received, and of other various devices patented to that end, which devices have, how-
ever, as aforesaid, enabled them to multiply only within a very limited scope the
number of commercial messages which could be simultaneously sent and received over
a single wire, or on metallic circuits composed of two or more wires. Further I am
familiar with the Hemholtz and other resonaters and their known uses, and I am
aware of the fact that they have been utilized by other inventors in various combina-
tions with tuning forks, tuned reeds, diaphragms and other vibrating devices, adjusted

page_text: to receive tones transmitted over a line wire, such use being intended, however, only
to increase the volume of sound of a given note transmitted as aforesaid.
In the art of multiple telegraphy the purpose of my invention is to increase the
number of practicable or commercial messages that may be simultaneously transmitted
over a single wire, or through a metallic circuit composed of two or more wires
parallelling each other, or otherwise. by an arrangement at the receiving station
whereby the tones or vibrations received from a line wire by one or more receivers
are separated or singled out. Thus each separate tone received by a receiver is heard
and understood by the receiving operator as an independent message, so that when a
number of tones, or series of vibrations or electrical impulses are simultaneously sent
out upon a wire by a given number of operators, the arrangement at the receiving
station is such that an equal number of operators thereat, or a less number, would
each simultaneously receive out of the mass of tones or notes received upon one or more
receiving instruments, those signals belonging to the note or tone transmitted from the
other end by that operator, who for the time being, was operating the corresponding
transmitting instrument at the originating point, and at the same time exclude from
all other operators at the receiving station, to a practical extent, the other tones or
notes comprising the signals which were simultaneously being transmitted by the
other operators on the same line to their respective correspondents at the receiving
station, who would cach enjoy the same exclusiveness as regards his special corre-
spondent as above specified.
For the purpose of accomplishing this result I may use at the transmitting or
originating station any device which transmits to the telegraph line, vibrations, un-
dulations, or impulses, giving rise to a tone or to similar vibrations in the receiving
instrument. I may, for instance, have tuning forks or vibrating reeds, or string
instruments, or revolving wheels tuned to various musical notes, as Do, Re, Me, or
Do', Me, Sol³, which in their actions will send on the line electrical pulsations equal to
the number of vibrations constituting their respective notes; or I may use any other
means to secure upon the line electrical pulsations of a given number or capacity.
At the receiving station I locate a magnet or series of magnets in electrical con-
nection with the main line, having a vibrating armature or armatures of such
construction that it will respond to any and all of the pulsations which are sent to
line by the transmitters from the transmitting station.
Such armature or armatures will therefore simultaneously reproduce all the tones
from which simultaneous impulses were sent to line and the function of a resonator
placed in proper relation to such armature, is to make audible to the ear of the
receiving operator one of these tones to the exclusion of all the others.
Referring to the accompanying drawings forming a part of this specification for a
more specific description of my invention.-
Fig. 1 is a diagramatic view of one form or arrangement of my invention, and-
Fig. 2 is a similar view of a modified form.
In Fig. 1 at the transmitting station A, I have shown two well known forms of
vibratory circuit breakers adapted to send each its own definite number of electrical
impulses to the main line 3, from a main battery 4.
These circuit breakers are shown as being controlled by rheotomes 5, in a local
circuit 6, which in turn is controlled by a key 7. It is evident that in place of the
rheotomes shown, any other form of circuit controller may be used, such for instance,
as a telephone transmitter actuated by a continuous sound or other well known
means.
At the receiving end B, of the line is shown a magnet 8, included in said line
which actuates a suitably mounted diaphragm 9. It is well known that a diaphragm
is capable of responding to all rates of vibration not only successively but also simul-
taneously. The diaphragm will therefore simultaneously reproduce all tones which
correspond to the rate of vibrations of the circuit breakers 1, 2, which may be in
operation at the transmitting end at any given moment. I have shown two circuit
breakers, but there is no practical limit to the number which may be used, and if all
of them should be put into operation by the simultaneous closure of the key 7, the

page_text: diaphragm 9, at the receiving end would at the same time respond to all the vibrations
impressed upon the line. To an ear applied to that diaphragm a compound sound
having in it as constituents the note of each circuit breaker would be audible, and no
single one could be distinguished with certainty. If now a Helmholtz, resonator 10,
is applied to the ear and arranged in proper relation to the diaphragm, the operator
will hear the note of the resonator if the same corresponds to the note of one of the
circuit breakers at the transmitting station, this note will sound in his ear with such
force that it will practically obliterate all other notes proceeding from the diaphragm.
This is the fundamental principle of my invention, and I utilize it for receiving by
one or more receiving instruments all the notes which may simultaneously be sent to
line, and I prefer to do it in the following manner :-
If only one receiving instrument is used I group about the same as many resonators
as there are transmitters at the distant station, each resonator corresponding in pitch
to the rate of vibration of one of the transmitters, whereby I am enabled to analize
the sound emitted by the receiver and receive each message sent from the distant
station.
Instead of a single receiver I may use two or more as is shown in Fig. 1, each
receiving all the messages.
In Fig. 21 have shown the transmitters and receivers as used in derviation from
a main line provided with ordinary Morse instruments, and being connected to the
line by separators or condensers 11. The transmitters are shown as being actuated by
rheotomes arranged in multiple arc branches of a local circuit. The receiver in this
case is shown as an electro-magnet having a diaphragm 9 at each end, and one or
more resonators 10, are arranged in proximity to each diaphragm.
While I have thus described some of the preferred forms of embody in my invention
it is evident that numerous and varied modifications may be made by those skilled in
the art without departing from the principle thereof and therefore I do not limit
myself to any particular construction or arrangement of devices.
Doted this 12th day of Anvil 1887
PHILIP M. JUSTICE,
55 & 56, Chancery Lane, London,
Applicant's Agent.

page_text: I, WILLIAM T. BARNARD of "Montebello" Baltimore, in the State of Maryland,
United States of America, Gentleman, do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :—
My invention relates to acoustic or tone telegraphy, and has for its object the
simultaneous transmission and reception of a number of independent messages over
the same line circuit, and it consists more especially in the combination and arrange-
ment with a number of independent transmitters connected with the line circuit of one
or more acoustic receivers also connected with the line, and with resonater analizers
for selecting the independent messages, as more fully explained hereafter.
I am aware of efforts having been made by other inventors to increase the capacity
of a single line wire for telegraph purposes by the employment of tuning forks,
vibrating reeds and other suitable devices for originating at the end of a line wire a
series of vibrations, electrical impulses or waves so as to give rise at the distant or
receiving end of the line to musical tones; the intention of such receivers, generally
stated being that the musical tones thus originated and thus transmitted should be
received by those acquainted with telegraphic codes as telegraphic messages. I am
also aware of the fact that by existing means the number of commercial or practicable
messages simultaneously originated and transmitted of a single wire by means of such
musical tones or electrical vibrations have been quite limited, as also of the obstacles
other inventors have encountered in their endeavours to increase the number of
separate sets of vibrations or series of signals that could be received at the distant
end of the line, so as to enlarge the number of commercial messages thus simultane-
ously received, and of other various devices patented to that end, which devices have
however, as aforesaid, enabled them to multiply only within a very limited scope the
number of commercial messages which could be simultaneously sent and received over
a single wire, or on metallic circuits composed of two or more wires. Further I am
familiar with the Hemholtz and other resonaters and their known uses, and I am
aware of the fact that they have been utilized by other inventors in various combina-
tions with tuning forks, tuned reeds, diaphragms and other vibrating devices,
adjusted to receive tones transmitted over a line wire, such use being intended,
however, only to increase the volume of sound of a given note transmitted as
aforesaid.
In the art of multiple telegraphy the purpose of my invention is to increase the
number of practicable or commercial messages that may be simultaneously trans-
mitted over a single wire, or through a metallic circuit composed of two or more wires
parallelling each other, or otherwise, by an arrangement at the receiving station
whereby the tones or vibrations received from a line wire by one or more receivers
are separated or singled out. Thus each separate tone received by a receiver is heard
and understood by the receiving operator as an independent message; so that when

page_text: a number of tones, or series of vibrations or electrical impulses are simultaneously
sent out upon a wire by a given number of operators, the arrangement at the receiving
station is such that an equal number of operators thereat, or a less number, would
each simultaneously receive out of the mass of tones or notes received upon one or
more receiving instruments, those signals belonging to the note or tone transmitted
from the other end by that operator who, for the time being, was operating the corre-
sponding transmittingi nstrument at the originating point, and at the same time exclude
from all other operators at the receiving station, to a practical extent, the other tones
or notes comprising the signals which were simultaneously being transmitted by the
other operators on the same line to their respective correspondents at the receiving
station, who would each enjoy the same exclusiveness as regards his special corre-
spondent as above specified.
For the purpose of accomplishing this result I may use at the transmitting or
originating station any device which transmits to the telegraph line vibrations, undula-
tions or impulses giving rise to a tone or to similar vibrations in the receiving
instrument. I may, for instance have tuning forks or vibrating reeds, or string
instruments, or revolving wheels tuned to various musical notes, as Do, Re, Me; or
Do 1, Me 2, Sol 3, which in their actions will send on the line electrical_pulsations
equal to the number of vibrations constituting their respective notes; or I may use
any other means to secure upon the line electrical pulsations of a given number or
capacity.
At the receiving station I locate a magnet or series of magnets in electrical connec-
tion with the main line, having a vibrating armature or armatures of such construction
that it will respond to any and all of the pulsations which are sent to line by the
transmitters from the transmitting station.
Such armature or armatures will therefore simultaneously reproduce all the tones
from which simultaneous impulses were sent to line and the function of a resonator
placed in proper relation to such armature, is to make audible to the ear of the
receiving operator one of these tones to the exclusion of all the others. Referring to
the drawings filed with my provisional specification for a more specific description of
my invention
Fig. 1 therein is a diagrammatic view of one form or arrangement of my invention,
and-
Fig. 2 is a similar view of a modified form.
In Fig. 1 at the transmitting station A, I have shown two well known forms of
vibratory circuit breakers adapted to send each its own definite number of electrical
impulses to the main line 3, from a main battery 4.
These circuit breakers are shown as being controlled by rheotomes 5, in a local
circuit 6, which in turn is controlled by a key 7. It is evident that in place of the
rheotomes shown, any other form of circuit controller may be used, such for instance,
as a telephone transmitter actuated by a continuous sound or other well known means.
At the receiving end B, of the line is shown a magnet 8, included in said line
which actuates a suitably mounted diaphragm 9. It is well known that a dia-
phragm is capable of responding to all rates of vibration not only successively
but also simultaneously. The diaphragm will therefore simultaneously reproduce
all tones which correspond to the rate of vibration of the circuit breakers 1, 2,
which may be in operation at the transmitting end at any given moment.
I have shown two circuit breakers, but there is no practical limit to the
number which may be used, and if all of them should be put into operation by the
simultaneous closure of the key 7, the diaphragm 9, at the receiving end would at the
same time respond to all the vibrations impressed upon the line. To an ear applied to
that diaphragm a compound sound having in it as constituents the note of each circuit
breaker would be audible, and no single one could be distinguished with certainity.
If now a Helmholtz resonater 10, is applied to the ear and arranged in proper
relation to the diaphragm, the operator will hear the note of the resonator if the.
same corresponds to the note of one of the circuit breakers at the transmitting
station; this note will sound in his ear with such force that it will practically obliterate

page_text: all other notes proceeding from the diaphragm. This is the fundamental principle of
my invention and I utilize it for receiving by one or more receiving instruments all
the notes which may simultaneously be sent to line, and I prefer to do it in the
following manner :-
If only one receiving instrument is used I group about the same as many resonators
as there are transmitters at the distant station, each resonator corresponding in pitch to
the rate of vibration of one of the transmitters, whereby I am enabled to analyze the
sound emitted by the receiver and receive each message sent from the distant station.
Instead of a single receiver I may use two or more as shown in Fig. 1, each receiving
all the messages.
In Fig. 2 I have shown the transmitters and receivers as used in derivation from a
main line provided with ordinary Morse instruments, and being connected to the line
by separators or condensers 11. The transmitters are shown as being actuated by
rheotomes arranged in multiple are branches of a local circuit. The receiver in this
case is shown as an electro-magnet having a diaphragm 9, at each end, and one or more
resonators 10, are arranged in proximity to each diaphragm.
While I have thus described some of the preferred forms of embodying my inven-
tion it is evident that numerous and varied modifications may be made by those
skilled in the art without departing from the principle thereof and therefore I do not
limit myself to any particular construction or arrangement of devices.
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed, I declare that what I claim is :
1. As an improvement in the art of multiple telegraphy, the method substantially
as hereinbefore described, consisting in producing upon a line superimposed series of
impulses and in analyzing such superimposed series of electrical impulses made audible
in a receiver.
2. As an improvement in the art of multiple telegraphy, the method substantially
as hereinbefore described, consisting in producing upon a line superimposed series of
impulses and in reproducing in a receiver such superimposed series of impulses and
separating each series from the other acoustically.
3. The combination of a main line over which several series of electrical impulses
are transmitted, a receiver responding to all of these impulses simultaneously, and
analyzers, substantially as described.
4. The combination of a main line over which several series of electrical impulses
are simultaneously transmitted, one or more receivers responding to all of these
impulses, and analyzers each corresponding to one of the series of impulses, substan-
tially as described.
111 1
PHILIP M. JUSTICE,
55 & 56, Chancery Lane, London,
Applicant's Agent.