IMPROVEMENTS IN TELEPHONIC RECEIVERS
Year: 1884

page_text: "
I, JOHN HENRY JOHNSON, of 47 Lincolns Inn Fields in the County of Middlesex,
Gentleman, do hereby declare the nature of said Invention for "IMPROVEMENTS
IN TELEPHONIC RECEIVERS which Invention has been communicated to me from
abroad by Philipp George Skrivanow, of Paris in the Republic of France, to
be as follows:-
This Invention consists in an arrangement of parts constituting a telephonic
receiver which can be readily and cheaply constructed and which is very efficient
in action. According to this Invention a magnet is provided forming the holder of
the receiver and consisting of two or more leaves plates or parts placed side by side
and connected at their poles to a plate which forms the base plate of the box or
receptacle which contains the two bobbins which are carried one by each of the
poles of the magnet. The coils of these bobbins are connected and led to the
respective terminal screws of the external wires the said terminal Screws being also
carried by the aforesaid plate. The diaphragm is secured by a cap. which forms
the cover of the instrument and has the orifice in it by which the sound issues from
the Apparatus.

page_text: "
I JOHN HENRY JOHNSON of 47 Lincolns Inn Fields in the County of Middlesex
Gentleman do hereby declare the nature of this invention for "IMPROVEMENTS IN
TELEPHONIC RECEIVERS which Invention has been communicated to me from
abroad by Philipp George Skrivanow of Paris in the Republic of France Electrician
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :—
This Invention consists in an arrangement of parts for a telephonic receiver
which can be readily and cheaply constructed and which is very efficient. in
action.
I will describe the said Invention with reference to the accompanying Drawing
Figure 1 of which represents in vertical section and Figure 2 of which represents in
plan an instrument constructed according to this Invention.
A is a magnet which constitutes the holder of the receiver or handle by which it
is held when in use. The said magnet consists of two or more (three are shewn in
Figure 2 of the drawing) leaves plates or parts preferably of the form shewn in
Figure 1 and placed side by side and secured together by screws or otherwise and
connected at their poles to a plate or disc B which forms the base or back plate or
cover of the box or receptacle C which contains the two bobbins D which are
carried one by each of the pole pieces a of the magnet. The coils of these bobbins
are in electrical connection with the terminal screws E E to which the external or
line wires are connected the said terminal screws E E being carried by the
plate B. The diaphragm G is secured by the cap H which forms the cover of the
instrument and has the orifice in it by which the sound issues from the
instrument.
Having now particularly described and ascertained the nature of the said
Invention and in what manner the same is to be performed I declare that what
I claim is
First In telephonic receivers a magnet composed of two or more leaves, plates,
or members placed side by side and secured together substantially as hereinbefore
described..
Second-In telephonic receivers a plate or disc B attached to the poles of the
magnet and carrying the terminal screws and forming the closure or back plate of
the case or box of the receiver substantially as hereinbefore described and illustrated
in the accompanying drawings.
Third: The telephonic receiver constructed or arranged substantially as herein-
before described and illustrated in the accompanying drawings.
J. HENRY JOHNSON,
47, Lincoln's Inn Fields, London, W.C.