Improvements in or relating to Voice Tubes, commonly called Speaking Tubes.
Year: 1892

page_text: Date of Application, 20th Apr., 1892
Complete Specification Left, 16th Sept., 1892-Accepted, 11th Feb., 1893
PROVISIONAL SPECIFICATION.
Improvements in or relating to Voice Tubes, commonly called
Speaking Tubes.
I HENRY ROSE, Captain in the Royal Navy of H.M.S. Rodney forming part
of the Channel Squadron do hereby declare the nature of this invention to be as
follows:-
This invention relates to means of improving the efficiency of speaking tubes so
that they may be available in situations where they are necessarily surrounded by
noises due to vibrating portions of machinery particularly for example in the case
of a speaking tube carried from the bridge to the engine room of a great
steam ship.
In such cases I clothe the pipes with sheet felt or other suitable non conducting
material of considerable thickness having preferably an outer covering of canvas.
The pipes thus lagged I suspend freely by india rubber bands or stays and so
eliminate or reduce to a minimum any vibratory action.
In places where it is absolutely necessary to stay the pipes to bulkheads by
means of a bracket I bed the pipe in the bracket with india rubber of considerable
thickness intervening.
I clothe the mouth piece in the manner hereinbefore described with reference to
the pipes and I provide it with a tubular india rubber ring so that it readily adapts
itself to the head of the person using the same as a receiver, shutting out all
surrounding noises.
Dated this 20th day of April 1892.
AYRTON & THOMAS,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to Voice Tubes, commonly called
Speaking Tubes.
"",
I, HENRY ROSE, Captain in the Royal Navy, of Her Majesty's Ship "Rodney.
forming part of the Channel Squadron, 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 improving the efficiency of speaking tubes so
that they may be available in situations where they are necessarily surrounded by
noises due to vibrating portions of machinery particularly for example in the case
of a speaking tube carried from the bridge to the engine room of a great
steamship.
In such cases I clothe the pipes with sheet felt or other suitable non conducting
material of considerable thickness having preferably an outer covering of canvas.
The pipes thus lagged I suspend freely by india rubber bands or stays and so
eliminate or reduce to a minimum any vibratory action. In places where it is
absolutely necessary to stay the pipe to bulkheads by means of a bracket I bed the
pipe in the bracket with india rubber of considerable thickness intervening between
the pipe and the bracket.
I clothe the mouth-piece of the speaking tube in the manner herein before described
with reference to the pipe and I provide it with a tubular india-rubber ring so that
it readily adapts itself to the head of the person using the same as a receiver
shutting out all surrounding noises.

page_text: In the accompanying drawings in all the figures of which the same part is
indicated by like reference letters;
Figure 1 is a sectional elevation of the mouth piece or receiver and a portion of
the pipe to which it is attached.
Figure 2 is a side elevation and Figure 3 is a plan showing a speaking tube fitted
in close proximity to the machinery in the engine room.
A is the speaking tube clothed in non conducting material B and suspended by
the india rubber guys C C¹ C" between the high and low pressure cylinders in an
engine room represented in part and indicated respectively by the reference
letters D E.
The mouth-piece or receiver F is formed with a recess or pocket G into which
an india rubber tube H is embedded as shown in Figure 1 to form a cushion for
the purpose of closely fitting to the head of the person using the same in order to
shut out all external sounds.
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 voice tube or speaking tube clothed with non conducting material and
carried by elastic suspension guys substantially as and for the purpose described.
2. A. mouth piece or receiver for voice tubes or speaking tubes clothed with non
conducting material and provided with an elastic encircling cushion at its orifice
substantially as and for the purpose described.
Dated this 16th day of September 1892.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.