A Telephone Apparatus without a Diaphragm.
Year: 1887

page_text: Date of Application, 11th June, 1887
Complete Left, 25th Nov., 1887
Complete Accepted, 27th Apr., 1888
PROVISIONAL SPECIFICATION.
A Telephone Apparatus without a Diaphragm.
I, FREDERICK WILLIAM NEALE of Winton Square, Stoke-on-Trent, Staffordshire,
Telephonic Engineer do hereby declare the nature of this invention to be as
follows:-
The object of this invention is to construct a telephonic apparatus without a
diaphragm and for this purpose I take any ordinary board of any desired shape with
a hole through it, to the edge of which on one side I attach a divided thimble or neck
piece of metal or other material, to which is secured sections of a tube of round,
square, or other shape of carbon or its equivalent, said carbon tube sections standing
out from the face of the board with open ends, into which tube the speaker can talk
as into an ordinary telephonic cup which has a diaphragm.
Each section of the carbon or like tube has a conducting wire linked to it but I
prefer that the carbon tube be in two pieces, say of a tube cut diametrically down its
length.
By this invention, the tube, thimble, and board has a clear opening through them
and said opening is not intercepted by any article or thing.
I, FREDERICK WILLIAM NEALE of Winton Square, Stoke-on-Trent, Staffordshire,
Telephonic Engineer do hereby declare the nature of this invention to be as
follows:-
The object of this invention is to construct a telephonic apparatus without a
diaphragm and for this purpose I take any ordinary board of any desired shape with
a hole through it, to the edge of which on one side I attach a divided thimble or neck
piece of metal or other material, to which is secured sections of a tube of round,
square, or other shape of carbon or its equivalent, said carbon tube sections standing
out from the face of the board with open ends, into which tube the speaker can talk
as into an ordinary telephonic cup which has a diaphragm.
Each section of the carbon or like tube has a conducting wire linked to it but I
prefer that the carbon tube be in two pieces, say of a tube cut diametrically down its
length.
By this invention, the tube, thimble, and board has a clear opening through them
and said opening is not intercepted by any article or thing.
H. GARDNER,
166, Fleet Street, London,
Agent for the said F. W. Neale.

page_text: COMPLETE SPECIFICATION.
A Telephone Apparatus without a Diaphragm.
I FREDERICK WILLIAM NEALE of 23 Perran Road, Tulse Hill in the county of
Surrey, Telephonic Engineer do hereby declare the nature of my said invention and in
what manner the same is to be performed to be particularly described and ascertained
in and by the following statement :-
The object of this invention is to construct a Telephone apparatus, termed a Tele-
phone transmitter or tension regulator by which sounds may be conveyed by
Electricity. I take a short piece of tube of light metal or other suitable material
which I divide in two, longitudinally.
One end of the divided tube is hinged at any suitable point along the line of
division I insert a carbon connection on the lower half of the tube and one on the
upper half of the tube. These carbons are connected with a Telephonic apparatus
and Battery by wires. The lower half of the tube is rigidly fixed upon any suitable
wall, pedestal, Board or standard; By speaking into one end of the tube it is set in
vibration corresponding with the vibrations of the human voice, thereby causing the
carbon connections to vary the Electrical Tension of the circuit and thus reproduce 1
the voice upon a Telephone or other suitable instrument.
By another method I hinge the divided tube at the side and the carbon points of
connection are placed in the division of the tube opposite the hinge.
The divided tube may however be hinged at the end; again instead of the carbon
connections being in the meeting edges I place outside the tube on the upper part, 2
two, three or more semicircles of carbon; between these semicircles loose pencils of
carbon are inserted.
When speaking down this tube the vibrations caused produce the same varieties
of Electrical tension with the same results as previously described.
In all these cases the tubes may either be straight or tapered but I prefer to use 2
the tapered.
My invention will be understood by the annexed drawings which are examples
only.
Figures 1 and 2 represent a tube divided lengthwise into two pieces A, B, these
standing out from but cemented or secured to two plates C, D which are attached by 8
screws to a wood backing or board E, this having a hole F in it, coincident with the
aperture of the pipe or tube A, B, and with that formed by the two plates C, D, so
that a clear passage is formed through them.
Each half tube A, B, has a wire G, H, to connect it with a contact plate I, J and
with the battery, other wires K, L, are also in contact one to earth and the other as 3
the transmitting wire or otherwise as with ordinary diaphragm apparatus.
These half tubes may be of carbon moulded or cut to shape and may have parallel
sides or tapered, but they may be of paper (compressed or other) or of other con-
venient material in which case 1 line the abutting edges with strips of carbon as at

page_text: Figure 3, both of which half tubes may vibrate when spoken into or only one half
tube may vibrate, the other half tube being a fixture as at Figure 4 either by
embedding it in the socket E or by screwing it in place as at Figure 5 where the
opposite half tube, (the vibrating one) is hinged from the speaking end as at
Figures 6 and 7 and instead of inlaying or affixing strips of carbon along the edges
small pieces of carbon, as contact pieces may be applied as there shown.
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
The construction of Telephonic apparatus or electrical tension regulator substan-
tially as shown in the annexed drawings (without a diaphragm) for receiving or
transmitting sounds electrically through ordinary wires as described.
The 25th day of November 1887.
H. GARDNER,
166, Fleet Street, London,
Agent for the said F. W. Neale.
H. GARDNER,
166, Fleet Street, London,
Agent for the said F. W. Neale.