IMPROVEMENTS IN TELEPHONES
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by the said Allen Westley Rose at the
Office of the Commissioners of Patents on the 21st June 1883.
ALLEN WESTLEY ROSE of Farringdon Road in the County of Middlesex
"IMPROVEMENTS IN TELEPHONES.”
My Invention has for its principal object to so arrange and connect the receiver
and transmitter of a Telephone that they form one instrument which can be carried.
in the hand so that the receiver may be placed simultaneously to the ear and the
transmitter to the mouth of the operator of the instrument. According to my said
Invention I connect the receiver to the transmitter by a rod bar or carrier which
is so curved or shaped that whilst one and is situated opposite the mouth the other
end is opposite the ear. At the first named end the Transmitter is carried and at
the other the Receiver is carried-When the rod bar or carrier of the instrument
is grasped by the hand of the user he simultaneously places the Receiver to his car
and the transmitter to his mouth-The instrument thus constructed has the
connecting wires led through the said rod bar or carrier which may be in the form
of a tube for this purpose and it may be in whole or part elastic or yielding so
that the relative positions of the parts of the instrument may be slightly altered
to suit different persons. The transmitter is preferably formed of a double
diaphragm the discs or plates of which are separated to a slight distance apart
and the space between contains powdered Carbon Tungsten or Tellurium but
preferably the Carbon-There is a space in the holder at front and back of the
said double diaphragm to allow free vibration of the discs or plates-A ring or
rings of an insulating material is or are used to separate the discs or plates―This
construction of Transmitter may be applied to instruments other than those herein-
before described. The Receiver is preferably formed with a magnet of a circular
form with one pole carried inwards to the centre to receive the bobbin the body
part of the said magnet being situated in the same plane with the coil so that the
Receiver occupies less room than it would do if the inagnet were outside the plane
in which the coil is situated.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Allen Westley Rose in the Great Seal Patent Office on the
19th December 1883.
ALLEN WESTLEY ROSE of Farringdon Road in the County of Middlesex
"IMPROVEMENTS IN TELEPHONES
"
In constructing a telephone according to my said Invention I connect the
receiver to a transmitter (constructed-as-hereinafter described) by a rod, bar,-or-
carrier, as shewn at X in Figure 1 of the accompanying drawing, which rod, bar,
or carrier, is so curved angled or shaped that whilst one end is situated opposite
the mouth the other end is opposito the ear of the user of the instrument, the said
transmitter is carried at one end and the receiver Y is carried at the other end, so
that when the rod bar or carrier X is grasped by the hand of the user he simul-
taneously places the receiver Y to his ear and the transmitter to his mouth. The
instrument thus constructed has the connecting wires led through the said rod bar
or carrier X which may be in the form of a tube for this purposo and it may be in
whole or part elastic or yielding so that the relative positions of the parts of the
instrument may be slightly altered to suit different persons. The transmitter is
formed according to my Invention as follows and as illustrated separately in
transverse section in Figure 2 of the accompanying drawing. It consists of a
double diaphragm formed of the discs or plates ab which are separated to a slight
-distance apart and are -held in-or-between the two-parts-A. B. of-the-holder. The-
space between the said plates a b contains powdered carbon Tungsten or Tellurium
or the equivalent (being other than magnetic particles) but preferably carbon.
There is a space in the holder or container both at the front and at the back of
the said double diaphragm as shown at A and B to allow of free vibration of the
said double diaphragm. A. ring or rings of an insulating material is or are used to
separate the discs or plates as shown at c. This construction of transmitter may
be applied to instruments other than those arranged as heroinbefore described.
The receiver which is shewn separately in transverse section (on the line 1:2
figure 4) in Figure 3 and side view with the cover removed in Figure 4 is preferably
formed with a magnet d of a circular form with one pole carried inwards to the
contre to receive the bobbin f the body part of the said magnet being situated in
the same plane with the bobbin f so that the receiver occupies less room than it
would do if the magnet were outside the plane in which the bobbin is situated.
Having now described and particularly ascertained the nature of my said
Invention and the manner in which the same is or may be used or carried into
effect I would observe in conclusion that what I consider to be novel and original
and therefore claim as the invention secured to me by the hereinbefore in part
recited Letters Patent is :-
First A Telephone consisting of the combination of a transmitter constructed
as herein before described and claimed by the succeeding claiming clause, a receiver
constructed with the bobbin and magnet in the same plane and a curved or angled
bar rod or carrier connecting the said transmitter and receiver and through which
the connecting wires are led as herein before described and illustrated in the
accompanying drawing.
Second A Telephonic transmitter consisting of discs or plates with powdered
carbon or its equivalent (being other than magnetic particles) between them the
compound diaphragm thus formed boing held in a casing or holder provided with

page_text: recosses in such a way that there is a free space both before and behind the said
compound diaphragm to allow of proper vibration thereof as hereinbefore described
with reference to the accompanying drawing.
In witness whereof I the said Allen Westley Rose have to this my Specification
set my hand and seal this Seventeenth day of December, One thousand eight
hundred and eighty three.
ALLEN WESTLEY, ROSE (LS.)