A New or Improved Telephonic Relay.
Year: 1894

page_text: Date of Application, 12th Mar., 1894
Complete Specification Left, 12th Dec., 1894-Accepted, 12th Jan., 1895
A New or Improved Telephonic Relay.
I, GEORGE GILLMORE, of 10 Athol Street Douglas, Isle of Man, Electrical
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to a telephonic relay, whereby telephonic currents may be
translated from one circuit to another, as for example from a local branch to a
trunk line or the reverse, or from one section of a long circuit to a succeeding
section, it being thus the equivalent, in telephonic work, of the ordinary telegraphic
relay.
In carrying out my invention, I arrange a magnet opposite to the tympanum of
a sound chamber or box, and place upon the maguet a coil which is included in
and forms part of the first circuit from which the current is to be translated. The
tympanum magnet and coil are equivalent to the corresponding parts of an ordinary
telephonic receiver, but may differ in forms and dimensions, and have the addition
of a sound chamber, which will tend to re-inforce the vibrations of the tympanum.
I also arrange that the vibrations of or produced by the tympanum may act
directly or indirectly upon a suitable transmitter, as for example by arranging the
contacts of a Blake transmitter upon the tympanum. The circuit of the transmitter
is arranged as usual, to include a local battery, and, if desired, also an induction
coil, the secondary of which is included in and forms part of the second circuit.
Dated this 10th day of March A.D. 1894.
WILLIAM E. HEYS,
Agent for the Applicant.
A New or Improved Telephonic Relay.
I, GEORGE. GILLMORE of 10 Athol Street, Douglas, Isle of Man, Electrical
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 :--
This invention relates to a telephonic relay whereby telephonic currents may be
translated from one circuit to another, as for example from a local branch to a
trunk line or the reverse, or from one section of a long circuit to a succeeding
section, it being thus the equivalent in telephonic work, of the ordinary telegraphic
relay which is useless for telephonic work.
In carrying out my invention I arrange a magnet opposite to the tympanum of
a sound chamber or box, and place upon the magnet a coil which is included in
and forms part of the first circuit from which the current is to be translated.
The tympanum magnet and coil are equivalent to the corresponding parts of an
ordinary telephonic receiver, but may differ in forms and in dimensions, and have
the addition of a sound chamber which tends to re-inforce the vibrations of the
tympanum.

page_text: I also arrange that the vibrations of or produced by the tympanum may act
directly or indirectly upon a suitable transmitter, as for example by arranging the
contacts of a Blake transmitter upon the tympanum. The circuit of the transmitter
is arranged as usual, to include a local battery, and if also desired, an induction
coil, the secondary of which is included in or forms part of the second circuit.
In the following more detailed description, reference is made to the accompanying
drawings in each of the figures of which similar parts are denoted by similar letters
of reference.
T is the transmitter at the sending station, B is the local battery, S the local
secondary coil, and L the line wire. If the circuit be not metallic, the ends ee
may be earthed, if metallic they are connected.
The relay consists of the receiver R which may be of any appropriate type,
having its diaphragm or tympanum opening into a suitable sound chamber C,
which may have a cylindrical form as shewn by the full lines, a double conoidal
form as shewn by the dotted lines Figure 1, or any other suitable and convenient
shape, the former being preferred. This sound chamber opens upon the diaphragm
or tympanum of the transmitter T in the same circuit with the local battery B¹
which also includes the primary of the secondary coil S¹.
Figure 2 illustrates a modification of the relay, in which a single diaphragm or
tympanum may be employed at one end of the sound chamber C.
The transmitters T T' as illustrated by the diagrams are of the. Marr and
Blake types respectively, but I do not limit myself to these as I may with equal
advantage use any known effective transmitter.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A telephonic relay consisting essentially of a sound chamber a telephonic
receiver and a telephonic transmitter, arranged substantially as herein before
described and as illustrated by the accompanying drawings.
2. In a telephonic relay the combination and arrangement with a sound chamber
of a telephonic transmitter and receiver, substantially as and for the purpose
hereinbefore described and as illustrated by the accompanying drawings.
3. In a telephonic relay the combination and arrangement with a sound chamber
of a telephonic transmitter and a receiver and a single tympanum or diaphragm
acting for both the transmitter and receiver, substantially as herein before described
and as illustrated by the accompanying drawings.
Dated this 12th day of December A.D. 1894.
WILLIAM E. HEYS,
Agent for the Applicant.