IMPROVEMENTS IN STETHOSCOPES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I EBENEZER THOMAS AYDON SMITH of 10 Alexandra Road, St John's Wood
in the County of Middlesex Apothecary do hereby declare the nature of my
Invention for IMPROVEMENTS IN STETHOSCOPES, to be as follows:-
The chest piece is formed of two ear-specula and one large chest piece fitted to a
junction the shape of the letter Y which has a small tube or hole in the side to
modify the sound. To this junction two elastic tubes are fitted, and at the other
end of these elastic tubes are two ear-pieces similar to those of an otoscope and
each fitted to its own elastic tube in a particular manner. The fitting are so
arranged that the tubes can be removed from this junction & joined together to
make an otoscope, or one ear speculum can be placed in each tube to form a
differential stethoscope, and they can be so arranged as to be capable of being used
for other purposes in an emergency. The bore of the instrument' is the same
diameter throughout.
E. T. AIDON SMITH, LȘ.A.
Redeclared at 1 Quality Court Chancery Lane in the County of Middlesex this
27th day of February 1884 before Mr Octavius Leefe, a Commissioner to administer
oaths in the Supreme Court of Judicature.

page_text: .
I, EBENEZER THOMAS AYDON SMITH, of 10 Alexandra Road, St. John's Wood,
in the County of Middlesex, Apothecary, do hereby declare the nature of my said
Invention for "IMPROVEMENTS IN STETHOSCOPES" 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 my invention is to effect improvements in stethoscopes, and to
extend and vary their, uses and adaptability.,
ן זיין
And in order that my said invention may be clearly understood, reference is
hereby made to the accompanying drawings.
The stethoscope is shown in Fig. 1. The ear pieces a a¹ are similar to those of
an otoscope. These are sometimes corrugated in order that they may be firmly
retained in the ears. That shewn at a is made. in two, portions for convenience of
adjustment. bb are the elastic tubes, one of which may be a Jaques' catheter.
These tubes at their lower extremities, are united to the forked tubes cc.
At the junction of the tubes c c there is a small hole or tube dy herein after called
the "key," which communicates with the interior of both branches c c. The use
of this key is to modify the sound by means of one of the fingers being applied
thereto, as shewn in Fig. 11; and, the sound can be heard as conveyed by either the
simple or the binaural stethoscope, without moving the instrument, a greater depth
of sound being obtained when the key d is closed. This key can be also applied to
other forms of stethoscopes.
The instrument is converted into a differential stethoscope by placing one of the
ear-specula in each tube, as shewn in Fig. 2. By removing the ear specula a
(Fig. 2) and joining the tubes, as shown in Fig. 3, it is an otoscope. By removing
the ear-piece a¹, and joining one of the ear-specula, as shewn in Fig. 4, it forms a
useful means of administering an emetic or nutriment to a stubborn or an insensible
patient, by passing the tube into the oesophagus through the nose, and using the
speculum as a funnel. Fig. 5 shews the instrument as used for a nasal douche.
In Fig. 6 it is shewn as a tourniquet over the brachial artery, and by using the
edge of the larger chest piece to compress the artery, the pulsation at the wrist can
be stopped.
Figs 7 and 8 simply shew the catheters and ear-specula. If it should have to
be used as a female catheter, it will be found to be long enough when joined (as
in Fig. 7) to reach over the side of the bed.
When connected as in Fig. 9 sufficient hydrostatic pressure is obtained to
administer an enema.
As shewn in Fig. 10 (the ear-piece a¹ having been removed) it can be used to
wash out the vagina, bladder, or any cavity, by raising the end so as to have
hydrostatic pressure to inject the fluid, and lowering the end as a syphon to draw
it off. The parts being easily replaced with new, after being used for such
purposes.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is :-
1 The application to stethoscopes of the key d substantially as and for the
11 the dwing

page_text: 2 The manufacture and use of the improved form of stethoscope constructed
arranged and operating substantially as and for the purposes hereinbefore described
and shewn on the drawings.
3 The several combinations and arrangements of the respective parts, together
forming my improvements in Stethoscopes, substantially as hereinbefore described
and shown on the drawings.