Improvements in or connected with Telephones.
Year: 1898

page_text: Improvements in or connected with Telephones.
I, JULES ERNEST OTHON KUMBERG, of 30, Brondesbury Villas, Kilburn, in the
County of Middlesex, French Civil Engineer, do hereby declare the nature of
this invention to be as follows:-
The invention relates to improvements in or connected with telephones.
The object of this invention is to obtain an instrument which will record
telephonic conversations or other sounds upon a phonogram blank of wax or other
suitable material by means of a stylus which indents or engraves or marks the
surface of the said phonogram blank.
The stylus is actuated and the "phonogram" is produced by vibrations which
are either natural, that is direct, or electrical that is indirect.
The vibrations at the transmitting instrument are caused to act directly upon
the recording stylus by the impact of the sound waves and at the receiving instru-
ment indirectly by the sound waves through the medium of an electric current.
In carrying the invention into effect a highly sensitive transmitter is employed
provided with a device for making and breaking the current.
This device consists of a flexible lever and pin which tend to make and increase
and to decrease and break the electro-magnetic force and thereby stimulate the
attraction or repellent force of the magnets and render the voice clear and distinct
for recording purposes at considerable distance.
The transmitter has as it were two channels for the sound waves that is to say:
the sound waves produced by speaking into the mouth-piece travel directly
through a tube or conveyor to the speaking diaphragm of the transmitting instru-
ment and at the same time these sound waves are electrically conveyed to the
receiving instrument at a distance, and recorded there upon a phonogram blank.
There is also provided an improved device for recording the sound waves in
the telephonograph at both the transmitting and receiving instruments.
This is accomplished through the intervention of a special micro diaphragm
having two compartments one of which is fitted with a multiple microphone and
the other with a sensitive disc of glass or equally suitable substance which receives
the undulations produced by the sound waves natural or electrical and com-
municates them to the recording stylus or other suitable tool underneath.
Below the diaphragm disc of glass is a cover or guard the twofold purpose of
which is to confine the sounds which obviously would go to waste from under-
neath and to lessen the scraping noise which the stylus produces by cutting into
the wax.
There is also on the diaphragm an adjustable floating weight for increasing the
vibrations caused by the sound waves and thereby rendering their recording
more exact.
The cell of the micro diaphragm is provided with a separate channel for receiv

page_text: ing the non-electrical waves, that is to say, that part of the sounds which has to
be recorded at the transmitting instrument directly without the aid of the micro-
phone and concurrently with its electric conveyance to the receiving apparatus
where it is recorded.
The speaking diaphragm can be thrown out of action when desired by simply
disengaging the feed mechanism when the instrument may be used as an ordinary
telephone.
The frame or slide bar common to phonograph instruments is provided with
a divided and numbered scale over which travels a pointer when the instrument is
in operation and the object of this arrangement is to enable the operator to record
and index the numbers upon the scale at which the conversation began and ter-
minated together with the date by which arrangement any particular message
may be easily selected for reproduction.
It may be observed that the reproduced sounds may be conveyed to one or
more telephone receivers concurrently with the recording of the conversation
and that the conversation recorded upon the phonogram can be reproduced
afterwards as many times as desired by slightly shifting the micro diaphragm
thereby bringing the reproducing point into the track of the record where formerly
the recording stylus was.
Or if desired two separate diaphragms may be employed one for recording
and the other for repeating.
By the means herein before referred to a telephonic message could be recorded
without the presence of a person being necessary at the receiving instrument in the
following manner.
After office hours or in the event of an office having
left temporarily unattended a phonogram could be put
which a message had been recorded such for instance as
will be back at 4 o'clock please press the button and I
and Mr. Brown will ring you up when he arrives."
a telephonograph being
into the machine upon
Nobody in, Mr. Brown
will take the message
This is accomplished by the following means that is to say: the instrument is
provided with an electrical starting device so that "ringing up
"would cause
the machine at the receiving end to answer instead of a human being and show
that there was no one at the receiving instrument; then by pressing a button
or otherwise the persons at the transmitting apparatus could set in motion an
electrical shifting device which would move the speaking diaphragm of the
receiving instrument in such a way as to bring the recording stylus in the place
of the reproducing point and the sender could thus leave a message with the
receiving instrument or two separate diaphragms mounted in a spectacle frame or
otherwise arranged or two separate phonogram cylinders could be used in a similar
way.
The subscriber at the receiving instrument coming in would see that the pointer
of the speaking diaphragm was shifted with relation to the scale pointer and
this circumstance would tell him that some one had left a message with his machine
whilst he had been out.
The person at the transmitting instrument having "rung off," the speaking
diaphragm would then automatically return to its former position and repeat to
any subsequent caller the same answer previously mentioned.
Date this 20th day of May 1808
WHITE & WOODINGTON,
Rooms 221-225, Birkbeck Bank Chambers,
Southampton Buildings, London, Agents.

page_text: improv
I, JULES ERNEST OTHON KUMBERG, formerly of 30, Brondesbury Villas, Kil-
burn, in the County of Middlesex, but at present residing at 321, Milkwood Road,
Herne Hill, in the County of Surrey, French Civil Engineer, 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:
The invention relates to improvements in or connected with telephones.
The object of this invention is to obtain an instrument which will record
telephonic conversations or other sounds upon a phonogram blank of wax or other
suitable material by means of a stylus which indents or engraves or marks the
surface of the said phonogram blank.
The stylus is actuated and the phonogram is produced by vibrations which are
either natural that is direct or electrical that is indirect.
The vibrations at the transmitting instrument are caused to act directly upon
the recording stylus by the impact of the sound waves and at the receiving instru-
ment at the distant station indirectly by the sound waves through the medium of
an electric current.
In carrying the invention into effect a highly sensitive transmitter of any well
known form is employed.
The transmitter however according to the present invention is provided with
two channels for the sound waves that is to say the sound waves produced by
speaking into the mouth piece travel directly through a tube or conveyor to the
speaking or recording diaphragm of the instrument at the transmitting station
which records them upon a phonogram blank and at the same time these sound
waves are electrically conveyed to the receiving instrument at the distant station
and there recorded upon a similar phonogram blank.
There is also provided an improved device for recording the sound waves in
the telephonograph at both the transmitting and receiving stations.
This is accomplished through the intervention of a special micro-diaphragm
having two compartments or cells one of which is fitted with a multiple or other
suitable microphone diaphragm disc and the other with a sensitive disc of glass
or equally suitable substance which receives the undulations produced by the sound
waves natural or electrical and communicates them to the recording stylus or
other suitable tool underneath.
Below the diaphragm disc of glass is a cover or guard the twofold purpose of
which is to confine the sounds which obviously would go to waste from under-
neath and to lessen the scraping noise which the stylus produces by cutting into
There is also on the diaphragm an adjustable floating weight for
increasing the vibrations caused by the sound waves and thereby rendering
their recording more exact.
the wax.
The cell of the micro diaphragm is provided with a separate channel for
receiving the non-electrical waves that is to say that part of the sounds which has
to be recorded upon the instrument at the transmitting station directly without
the aid of the multiple or other microphone or diaphragm and concurrently with
its electric conveyance by the line wire of the telephone transmitter to the
receiving apparatus at the distant station where it is also recorded.
The recording or speaking diaphragm at either station can be thrown out of
action when desired by simply disengaging the feed mechanism when the instru-
ment may be used as an ordinary telephone.
The frame or slide bar common to phonograph instruments is provided with

page_text: a divided and numbered scale over which travels a pointer when the instrument is
in operation and the object of this arrangement is to enable the operator to record
and index in a register the numbers upon the scale at which the conversation
began and terminated together with the date by which arrangement any particular
message may be easily selected for reproduction.
It may be observed that the sounds may be conveyed to one or more telephone
receivers concurrently with the recording of the conversation and that the con-
versation recorded upon the phonogram can be reproduced afterwards as many
times as desired by slightly shifting the micro-diaphragm thereby bringing the
reproducing point into the track of the record where formerly the recording
stylus was.
Or if desired two separate diaphragms may be employed one for recording and
the other for repeating or reproducing.
By the means herein before referred to a telephonic message could be recorded
without the presence of a person being necessary at the receiving instrument in the
following manner.
After office hours or in the event of an office having a telephonograph being
left temporarily unattended a phonogram could be put into the machine upon
which a message had been recorded such for instance as:-
66
Nobody in, Mr. Brown will be back at 4 o'clock, please press the button and
I will take the message and Mr. Brown will ring you up when he arrives."
provided with an electrical starting device so that "ringing up" would cause
This is accomplished by the following means that is to say: the instrument is
the machine at the receiving end to answer instead of a human being and show
that there was no one at the receiving instrument; then by pressing a button
or otherwise the person at the transmitting apparatus could set in motion an
electrical shifting device which would move the recording speaking diaphragm of the
receiving instrument in such a way as to bring the recording stylus into action
in place of the reproducing point and the sender could thus leave a message with
the receiving instrument or two separate diaphragms mounted in a spectacle frame
or otherwise arranged or two separate phonogram cylinders could be used in a
similar way.
The person at the transmitting instrument having "rung off" the reproducing
diaphragm would at the next ringing up automatically return to its former
position and repeat to any subsequent caller the same answer previously mentioned.
The subscriber at the receiving instrument coming in would see that the
pointer of the speaking or recording diaphragm was shifted with relation to the
scale pointer and this circumstance would tell him that some one had left a
message with his machine whilst he had been out.
And in order that the said invention may be more clearly understood and
readily carried into effect I will proceed aided by the accompanying drawings
more fully to describe the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a side elevation partly in section representing an instrument con-
structed according to the present invention and showing the cutting point of the
recording or micro diaphragm in engagement with the long phonogram blank
or cylinder and the stylus of the reproducing diaphragm out of engagement with
the short cylinder.
Figure 2 is a plan of part thereof.
Figure 3 is a detail view of part of Figure 1.
Figure 4 represents part of Figure 3 but showing the stylus of the reproducing
diaphragm in engagement with the short phonogram or cylinder.
Figure 5 is a side elevation of the reproducing diaphragm separately.
Figure 6 is a plan thereof.
Figure 7 is a vertical section of the recording or micro diaphragm separately.
Figure 8 is a front elevation of part of the instrument illustrating more par-

page_text: ticularly the means for throwing the recording stylus out of action and also
the divided scale and pointer and,
Figure 9 represents part of Figure 8 showing the operative parts in their
opposite position.
In the several figures in which like parts are indicated by similar letters of
reference Figures 5 to 7 are drawn to an increased scale with respect to the other
figures of the drawings.
a represents the base plate and frame of the instrument b represents the trans-
mitter which may be of any well known and highly sensitive type e represents the
ordinary receiver d represents the upper cell of the micro diaphragm and e repre-
sents the lower cell thereof which cells are coupled by a tube and the cell e
which contains the recording diaphragm proper is carried in a holder mounted
with capability of slightly turning upon the tube for the purpose hereinafter
described and represents the cell of the message reproducing diaphragm.
The micro-diaphragm de is carried by a curved arm g which is pivotally
mounted with capability of laterally sliding upon a guide bar g' at its ends
carried in brackets a from the base plate a and the arm g near to its pivotal
point is furnished with a spring offset g² at its lower end carrying a half nut g³
which engages the ordinary feed screw h which is coupled with and driven by the
usual electro-motor (not shown) in the manner well known by which means the
micro-diaphragm de is traversed longitudinally of the phonogram blank a
placed upon the mandrel i which is assumed to be mounted and driven in the
manner customary in phonographic instruments.
The arm g is hollow and has mounted therein the usual magnets, which how-
ever must be of a powerful character, and connections necessary to actuate the
diaphragm in the upper cell d of the micro-diaphragm and said arm near to
its pivotal point is provided with terminals to which are coupled the line
wires which however are not shown.
The free end of the arm g is steadied by means of a saddle j¹ which is carried
by a collar mounted on the cell e of the micro diaphragm and this saddle j¹
rests upon a guide bark which at its ends is flattened and provided with vertical
slots which receive studs carried by posts fixed with the base plate a and
the guide bar is loosely carried in curved seats or rests provided at the
upper part of a plate-like bar which is carried by links at their upper ends
pivotally connected to the bar and at their lower ends pivotally carried by
lugs from the base plate a.
Transversely of the bar k and at one end mounted at a³ in that part of the
frame a carrying the scale bar a* and at the other end mounted in a lug a' from
the base plate a is a short shaft upon which is fixed beneath the bar a cam 6
formed with a nose or point k, thereon whilst the front end of the shaft is
furnished with a crank handle by means of which the shaft may be rotated
so that by turning said shaft a quarter revolution the cam will raise the bar k²
and consequently the micro diaphragm and at the same time disengage the nut g³
from the feed screw h thus throwing the micro diaphragm out of action and the
parts will thus be retained by the nose 7 of the cam until the shaft is
rotated in the opposite direction either by hand or by the electric device herein-
after described.
The mouth-piece 61 of the transmitter b is provided with two channels as it
were for the sound waves that is to say the sound waves produced by speaking
into the mouth-piece b¹ travel directly through a tube, channel or conduit b² to
the recording diaphragm disc et of the cell e of the micro diaphragm at the trans-
mitting station and cause the cutting tool of the lever el actuated by the
diaphragin to record the conversation upon the phonogram blank carried by
the mandrel i and at the same time these sound waves are electrically conveyed
over the line wire 6* to a similar instrument which for the time being is the
receiving instrument at the distance station and pass by the terminals g of the

page_text: arm g through the electro magnets of the diaphragm disc of the cell d of the
micro diaphragm which as hereinafter described is or may be coupled with the
diaphragm disc of the cell e so that the sound waves are similarly recorded at
the distant station upon a phonogram blank such as a whilst at the same time
the conversation can be heard through the receiver c of the distant instrument
which is electrically connected with the microphone cell d.
The lever e¹ of the micro diaphragm de is provided with two points one e² a
cutting instrument for recording on the phonogram blank and the other e³ a
blunt stylus for following the groove or incision formed by the cutting instru-
ment and the cell e of the micro-diaphragm is mounted with capability of turning
upon the tube d¹ so that said cell may be slightly rotated to throw the cutting
tool out of action and the blunt stylus into action or vice versa in the well known
manner and thus the conversation may be reproduced by the instrument at either
the transmitting or distant receiving station at will and to enable said reproduction
to be heard a listening tube d* is connected with the tube d of the micro-
diaphragm de.
The micro diaphragm is of special construction that is to say it is provided
with two compartments de the upper one d of which may be a multiple micro-
phone although only a single diaphragm disc d is shown and the lower one e
of which is provided with a sensitive disc of glass et or other suitable substance
which receives the undulations produced by the sound waves natural or direct by
way of the channel 62 or electrical or indirect through the electro-magnets within
the arm g and microphone & and communicates them to the lever e¹ carrying the
recording stylus e3 or other suitable tool underneath.
In order that the sound waves may be communicated from the disc or diaphragm
d² of the cell d to the disc or diaphragm et of the cell e the said diaphragm discs
are sometimes coupled by a link e of fine wire fixed therewith by which means
the apparatus is rendered more sensitive.
Below the diaphragm disc of glass e is provided an aperture cover or guard e
the two-fold purpose of which is to confine the sounds which obviously would go
to waste from underneath and to lessen the scraping noise which the stylus or
cutting tool e produces by cutting into the wax of the phonogram blank .
The diaphragm cell e is also provided with an apertured floating weight e
on which is pivotally mounted upon a stud e* the lever which carries the record-
ing and reproducing tools and this floating weight e6 is mounted upon a
loose hinge e to admit of the reproducing stylus readily following the channel
or groove of the phonogram.
Floating weights have been previously employed in a similar manner in
phonograph apparatus the object thereof being to enable the reproducing and
cutting tools employed in said instruments to over-ride any irregularities in
the surface of the cylinder the material of which the latter is made being liable
to expansion and contraction but it has been found by experiment that the revolv-
ing motion of the cylinder over which the stylus travels causes the floating weight
to jump or rebound and this obviously prevents the acting tool from properly
fulfilling its function.
In order to obviate this defect the floating weight es is according to the present
invention made adjustable to said inequalities by means of a spring es which at
one end bears upon the floating weight and at the other end acts against a
disc e fixed with a regulating screw e screwing through a nut ell so that the
force exerted by the spring upon the floating weight e may be regulated at will
and in order to limit the maximum downward movement of the floating weight es
a stop e2 is provided consisting of a headed stud fixed with the frame e and
passing through an aperture in the weight e".
By the aid of the device lastly hereinbefore described the jumping action of the
floating weight is modified or prevented and the spring whilst permitting the
necessary up and down movement of the recording stylus e to adjustably follow

page_text: the inequalities of the surface of the phonogram blank at the same time increases
the impulses of the vibrations created by the sound waves and causes the same
to make a deeper cut or incision than heretofore with the result that when
reproduced the sounds are also increased whilst the reproducing stylus e³ is
similarly caused to more closely and adjustably follow the groove of the phono-
gram.
The micro diaphragm de is as herein before described provided with a separate
channel 6ª for receiving the non-electrical sound waves which are to act upon
the diaphragm disc of the micro diaphragm de, that is to say that part of the
sounds which has to be recorded at the transmitting station directly without the
aid of the transmitter b and concurrently with its electrical conveyance by the line
wire to the terminals of the receiving apparatus at the distant station
where it passes through the arm g and micro diaphragm de and is similarly
recorded as herein before described.
The recording part of the instrument can as herein before explained be put
out of action when desired by simply turning the handle thus raising the micro
diaphragm de and throwing the feed mechanism g³h out of gear when the
telephonic transmitter 66' and receiver c may be used as an ordinary telephone.
The scale bar carried by part of the frame a is provided with a divided and
numbered scale a* as shown more particularly at Figure over which when
the instrument is in operation travels an index or pointer 3 carried by the
saddle resting upon the slide bar and also loosely mounted upon the slide
bark is an indicator or marker * and the object of this arrangement is to record
by the stationary indicator * the position at which the conversation commenced
and by the travelling hand or pointer the position at which it terminated, and
the operator is thus enabled to make a note in a register of these particulars by
which means he can at any future time at once select any particular message for
reproduction by the instrument.
From the foregoing it will be understood that the conversation may be con-
veyed to one or more telephone receivers at a distance concurrently with the
recording of the conversation at the transmitting station and that the conversation
recorded upon the phonogram cylinder as herein before described can be repro-
duced afterwards as many times as desired by bringing into the track of the
record the reproducing stylus of the micro diaphragm de.
is
For the reproduction of short messages a separate diaphragm
preferably employed and for that purpose the diaphragm f which is
separately represented at Figures 5 and 6 and is substantially the same as the
lower part of the micro diaphragm hercinbefore described and the details of
which are therefore unlettered is supported in a holder f¹ which is formed with
an offset f which is received between and pivotally mounted in the limbs of
the fork of a lever f which is mounted upon a vertical axis f6 carried by a
bracket as from the frame a and this lever is on one side acted upon by a spring f
which moves it in one direction whilst a cam f8 rotated at the times desired in
the manner hereinafter described moves it in the opposite direction and thus
the diaphragm f is traversed over the short phonogram cylinder a¹ hereinafter
more particularly referred to.
The phonogram upon the short cylinder a¹ is produced by placing it upon the
mandrel i in position beneath the instrument de bringing the stylus e² into action
switching on the motor and speaking at the mouth-piece band it is then shifted
along the mandrel into the position indicated by the dotted lines a¹ in Figure 2,
in readiness for use.
The diaphragm f is adapted to be turned upon its pivotal point at f³ to raise it
out of action as indicated at Figure 1, or to be lowered onto the phonogram x¹
when it is desired to reproduce a message and in order to raise and hold it out
of action when desired a lever or detent m formed with a rounded nose or cam
is employed which is mounted upon an axis m¹ said lever being actuated by a
rod m² provided with a handle m³.

page_text: The short message reproduced by the diaphragm f from the phonogram
passes by the tube f* to the telephone transmitter b which is double faced for
that purpose whence it passes over the line wire * to the receiving instrument at
the distant station.
In order to give the required rotary motion to the cam f said cam is fixed
upon the upper end of a shaft fo mounted with capability of revolving in a
bearing fo in the bracket as whilst at its lower end it is mounted in a bearing fl
in the base plate a and this shaft has also fixed thereon a bevelled wheel f12 which
gears with a corresponding wheel fa fixed upon one end of a short shaft f
mounted in a boss or bearing a formed on the frame a whilst at its other end
it has fixed thereon a band wheel or pulley fl which by a band f¹ is coupled
with the pulley upon the shaft of the electro motor which gives motion to the
mandrel and feed mechanism and which is not shown inasmuch as it is well
known to persons acquainted with phonographic instruments.
The diaphragm f thus receives a traverse to and fro over the short phonogram al
and in order that after traversing said phonogram from its initial point to the
termination of the phonogram its stylus may not in its return motion again
traverse the same a segmental cam fi is fixed upon the shaft fo and is or must
be so arranged and timed that in the revolution of the shaft fit will act against
the under faces of curved offsets f from the holder f¹ and lift the diaphragm f
upon its hinge f and thus hold it during its return traverse to its starting
point when said cam will allow the diaphragm to descend with its reproducing
stylus again in engagement with the phonogram al.
In the event of the electric circuit being broken for example at the exchange
by ringing off after the delivery of the message and at the termination of the
outer traverse of the diaphragm f at the distant station and before the diaphragm
has returned to its zero point, the next ringing up and completion of the circuit
will cause the diaphragm to return to zero and again reproduce the message,
and so on.
In order to enable the recording instrument de at the distant station to be
brought into action assuming it to have been thrown out of action by turning
the handle and raising the slide bark and disengaging the feed mechanism g³ h
as herein before described the following simple device is employed and which is
represented at Figures 8 and 9.
a
Upon the shaft 5 in addition to the cam ke formed with the nose or point k
is a disc provided with a notch and in connection therewith is employed
clawker mounted upon an axis of motion n carried by the armature 3 of an
electro magnet n' and which is kept up to its work by a spring n² and the tooth
of the clawker in the acting position of the nose of the cam that is when the
slide bar is raised engages the notch of the disc io.
The electro magnet is placed in the ordinary telephone circuit but is so
formed or arranged that the ordinary current is not sufficient to actuate it in the
manner desired but at each station is provided a supplemental battery or other
source of additional electricity which is adapted to be brought into the ordinary
circuit by the pressing of a button by which means the electro magnet n will be
caused to attract the armature n³ and the clawker n will rotate the disc kto and
shaft sufficiently to dislodge the nose 7 of the cam from the bar thereby
permitting the instrument de to descend into position for use.
It will be obvious that any other well known electrical device may be employed
for effecting the above object.
As a modification of this device the instrument de may be automatically thrown
into and out of action for example by the following means.
The bar and instrument de may be normally held raised by a spring and
the armature n³ connected to the bar 12 so that whilst the button at the distant
station is depressed the armature n³ will be attracted by the magnet n which
must be of a powerful character and the instrument de will be held in action

page_text: whilst immediately that said button is released the instrument will be raised
out of action by the spring.
This arrangement of parts is so easily understood that it is not thought
necessary to illustrate the same.
By the means herein before described a telephonic message could be recorded
without the presence of a person being necessary at that instrument for the
time being the receiving instrument in the following manner.
After office hours or in the event of an office having a telephonograph being
left temporarily unattended a short phonogram cylinder such as would pre-
viously be placed upon the mandrel i as indicated by the dotted lines in Figure 2
said phonogram bearing the required short message such for example as the
following:
"Nobody in, Mr. Brown will be back at four o'clock, please press the button
and I will take the message and Mr. Brown will ring you up when he arrives."
The person (Mr. Brown) at the home station would then press in the knob m³
thus bringing the diaphragm f into action, after which he would be free to go
out.
The person at the distant station desiring to communicate with Mr. Brown
would then ring up the exchange and the exchange would ring up Mr. Brown at
the home station thus completing the circuit and starting the instrument and
causing the above message to be conveyed by the diaphragm f conduit f* and
line to the distant station.
The person at the distant station finding that Mr. Brown was out, and wishing
to leave a message with him would then press the button which would have the
effect of bringing into action the electro magnet and lowering the instru-
ment de into position for use as herein before described, and he could then send
his message over the line wire to the home station where it would be recorded by
the instrument de upon the phonogram blank so that upon Mr. Brown's return
to office he would see that the pointer 3 of the instrument de had moved with
relation to the scale a*, and this circumstance would tell him that some-one had
left a message with his machine whilst he had been out and he could then by
switching on the motor and bringing into action the reproducing point of the
instrument de and listening at the listening tube *, hear the message reproduced.
The person at the distant station after recording his message upon the home
instrument would ring off in the usual way and the repeating diaphragm f would
in the next ringing up automatically return to its initial position and again
traverse the phonogram ¹ and repeat to any subsequent caller at any other distant
station the same answer previously mentioned.
It will be understood that the details of construction and arrangement of the
various parts of the apparatus are capable of considerable modification without
departing from the principle of the invention.
For example the sound waves might be electrically conveyed from the trans-
mitter b to the micro-diaphragm de but this arrangement is considered inferior
to that herein before described.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:
-
1. A telephonic instrument comprising a telephone the transmitter mouthpiece
of which is provided with a separate channel for the natural sound waves and a
phonograph the diaphragm cell of which is by a tube or conduit connected with
said channel substantially as herein shown and described.
2. A telephonic instrument comprising a telephone the transmitter mouthpiece
of which is provided with a separate channel for the natural sound waves, a
phonograph, a telephone receiver carried by the diaphragm arm of the phono-
graph and placed in the electric circuit and by a tube coupled with the cell of
the phonograph diaphragm and a conduit connecting the coupling tube with the

page_text: separate channel of the telephone mouthpiece substantially as herein shown and
described.
3. A telephonic instrument comprising a telephone the transmitter_mouth-
piece of which is provided with a separate channel for the natural sound waves,
a phonograph, a telephone receiver or microphone carried by the diaphragm
arm of the phonograph and placed in the electric circuit and by a tube coupled
with the cell of the phonograph diaphragm a conduit connecting the coupling
tube with the separate channel of the telephone mouthpiece and a separate listen-
ing receiver electrically connected with the microphone receiver and means for
throwing the phonograph into and out of action substantially as herein shown
and described.
4. A telephonic instrument comprising a telephone the transmitter mouthpiece
of which is provided with a separate channel for the natural sound waves a
phonograph a micro-diaphragm or telephone receiver carried by the diaphragm
arm of the phonograph and placed in the electric circuit and furnished with
recording and reproducing tools, a conduit connecting the micro-diaphragm with
the separate channel of the telephone mouthpiece a separate listening receiver
placed in the electric circuit and means for throwing the phonograph into and out
of action substantially as herein shown and described.
5. A telephonic instrument comprising a telephone the transmitter mouthpiece
of which is provided with a separate channel for the natural sound waves, a phono-
graph a micro-diaphragm or telephone receiver placed in the electric circuit
and carried by the diaphragm arm of the phonograph and furnished with recording
and reproducing tools, a conduit connecting the micro-diaphragm with the
separate channel of the telephone mouthpiece a separate listening receiver placed
in the electric circuit a listening tube connected with the micro-diaphragm and
incans for throwing the phonograph into and out of action substantially as herein
shown and described.
6. A telephonic instrument comprising a telephone the transmitter_mouth-
piece of which is provided with a separate channel for the natural sound waves,
a phonograph, a micro-diaphragm a telephone receiver placed in the electric
circuit and carried by the diaphragm arm of the phonograph and furnished with
a floating weight or the like carrying the recording and reproducing tools and
made adjustable by a spring, a conduit connecting the micro-diaphragm with
the separate channel of the telephone mouthpiece and means for throwing the
phonograph into and out of action substantially as herein shown and described.
7. In an instrument of the character herein before described a phonograph
diaphragm furnished with a floating weight or the like carrying the recording and
reproducing tools and made adjustable by a spring substantially as herein shown
and described.
8. A telephonic instrument comprising a telephone the transmitter mouthpiece
of which is provided with a separate channel for the natural sound waves, a
phonograph, a telephone receiver or microphone carried by the diaphragm arm
of the phonograph and placed in the electric circuit and by a tube coupled with
the cell of the phonograph diaphragm, a link coupling the diaphragm disc of the
microphone or receiver with the diaphragm disc of the phonograph diaphragm, and
a conduit connecting the coupling tube with the separate channel of the telephone
mouthpiece substantially as herein shown and described.
9. A micro-diaphragm comprising two diaphragm dises arranged with a space
between them substantially as herein shown and described.
10. A micro-diaphragm comprising two diaphragm discs coupled by a link sub-
stantially as herein shown and described.
11. A telephonic instrument comprising a telephone, a phonograph, and
electrically actuated means for throwing the phonograph diaphragm into or out
of action from the distant station substantially as herein shown and described.
12. A telephonic instrument comprising a telephone, a phonograph, a micro-
diaphragm or telephone receiver placed in the electric circuit and carried by the

page_text: diaphragm arm of the phonograph and furnished with recording and reproducing
tools and an electrical connection between the telephone receiver or microphone
and the transmitter substantially as herein shown and described.
13. A telephonic instrument comprising a telephone the transmitter mouthpiece
of which is provided with a separate channel for the natural sound waves, a phono-
graph, a micro-diaphragm or telephone receiver placed in the electric circuit
and carried by the diaphragm arm of the phonograph and furnished with recording
and reproducing tools, a conduit connecting the micro-diaphragm with the
separate channel of the telephone mouthpiece, a separate listening receiver placed
in the electric circuit, a listening tube connected with the micro-diaphragm, a
separate reproducing diaphragm adapted to traverse a short phonogram cylinder,
means for traversing said diaphragm, means for lifting the diaphragm out of action
on its return traverse, and a tube or conduit connecting said diaphragm with
the telephone transmitter substantially as herein shown and described.
14. A telephonic instrument of the character herein before referred to, the
phonograph portion of which is provided with a pointer carried by the diaphragm
a divided and figured scale over which the pointer travels and a loose index hand
or marker substantially as herein shown and described.
15. A telephonic instrument constructed and operating in manner substantially
as herein shown and described.
WHITE & WOODINGTON,
Rooms 221-225, Birkbeck Bank Chambers,
Southampton Buildings, London,
Agents.