Improvements in Telephones.
Year: 1895

page_text: Date of Application, 13th July, 1875
Complete Specification Left, 13th Apr., 1896-Accepted, 23rd May, 1896
PROVISIONAL SPECIFICATION.
Improvements in Telephones.
We, ANTON HAMM, of Ferencz Utcza 35, and GERGELY BLANK of Kerepesi
Utcza 23, both of Budapest, VICTOR BRANDT, of Dees in Siebenburgen, and
GYULA KÖRMENDY, of Brad in Siebenburgen, all in the Kingdom of Hungary,
do hereby declare the nature of this invention to be as follows:--
This invention relates to means of strengthening the sounds proceeding from a
telephone receiver so as to render it unnecessary to apply it to the ear.
For this purpose, in each station between the microphone transmitter and the
receiver a ring shaped magnet inductor or a number of these is introduced, the
primary coil of the inductor or of the first of several being in the microphone
circuit, whilst in the case of several, the primary coils of the inductors that follow
are the secondary coils of those which precede them, and the secondary coil of the
single inductor or of the last of several is connected to the receiver and line.
By employing such inductors closed on themselves greatly strengthened induction
currents are obtained, which very much strengthen the received sounds without
altering their quality as in existing so called loud telephones, and thus, music, song
and speech are transmitted with great advantage by telephones to which this
invention is applied.
Figs. 1 and 2 of the accompanying drawings represent diagrammatically two
arrangements of inductors, that of Fig. 2 being specially applicable in long lines.
In each station in
I and II are two telephone stations connected by the line L.
the line from the battery B through the microphone M is introduced a ring
inductor J, consisting of fine annealed iron wire wound in many convolutions to
form a ring shaped bundle, both ends being connected together. This ring is
wound over with insulated copper wire, which constitutes the primary coil of the
inductor and is connected through the microphone and to the battery.
The secondary coil of J is wound once or several times around the ring and is
connected through the receiver H to line L and to earth.
In this way the variations of the battery current effected by the microphone
action excite greatly strengthened induction currents, and this strengthening may
be enhanced by coating the ring inductors with wax separating their convolutions.
For long lines it is of advantage to employ in each station several ring inductors J
as represented in Fig. 2 in which two such inductors are shewn. The line / con-
taining the microphone M and battery B, as in the former case is connected to the
primary coil of the first inductor, the secondary coil of which is connected to the
primary coil of the second inductor, which has its secondary coil connected through
the receiver H to line L and to earth.
ABEL & IMRAY,
Agents for the Applicants..

page_text: Гетерпоцев.
We, ANTON HAMM, of Ferencz Utcza 35, and GERGELY BLANK of Kerepesi
Uteza 23, both of Budapest, VICTOR BRANDT, of Dees in Siebenburgen, and
GYULA KÖRMENDY of Brad in Siebenburgen, all in the Kingdom of Hungary,
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 :-
This invention relates to means of strengthening the sounds proceeding from. a
telephone receiver so as to render it unnecessary to apply it to the ear.
For this purpose, in each station between the microphone transmitter and the
receiver a ring shaped magnet inductor or a number of these is introduced, the
primary coil of the inductor or of the first of several being in the microphone"
circuit, whilst in the case of several, the primary coils of the inductors that follow
are the secondary coils of those which precede them and the secondary coil of the
single inductor or of the last of several is connected to the receiver and line.
By employing such inductors closed on themselves greatly strengthened induction
currents are obtained, which very much strengthen the received sounds without
altering their quality as in existing so called loud telephones, and thus music, song
and speech are transmitted with great advantage by telephones to which this
invention is applied.
Figs. 1 and 2 of the drawings accompanying my Provisional Specification
represent diagrammatically two arrangements of inductors, that of Fig. 2 being
specially applicable in long lines.
I and II are two telephone stations connected by the line L. In each station in
the line from the battery B through the microphone M is introduced a ring
inductor J Fig. 1 consisting of fine annealed iron wire wound in many convolutions
to form a ring shaped bundle, both ends being connected together. This ring is
suitably insulated and wound over with copper wire, which constitutes the primary
coil of the inductor and is connected with its two ends through the microphone and
to the battery, forming the before mentioned line l.
The windings on the ring inductor are made by first insulating the wires for the
primary and secondary coils from each other by means of a covering of silk or
other material, and then winding the primary wire once, and the secondary wire
one or more times round the ring.
The secondary coil of J is wound once or several times around the said ring and
its ends are connected through the receiver H to line L and to earth.
In this way the variations of the battery current effected by the microphone
action excite greatly strengthened induction currents, and this strengthening may
be enhanced by coating the ring inductors with wax either after coiling or with
layers of wax separating their convolutions.
For long lines it is of advantage to employ in each station several ring.
indicators J in series as represented in Fig. 2 in which two such inductors are
shewn. The line containing the microphone M and battery B, as in the former
case is connected to the primary coil of the first inductor, the secondary coil
of which is connected to the primary coil of the second inductor, which has its
secondary coil connected through the receiver H to line L.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed, we declare that what
we claim is —
For strengthening the sounds from a telephone receiver without altering their
quality, the use of ring shaped magnet inductors consisting each of a closed coil

page_text: of soft iron wire, wound with insulated primary and secondary coils, connected as-
berein described to the transmitting and receiving instruments, batteries, line and
earth.
ABEL & IMRAY,
Agents for the Applicants.