Improvements in Tobacco Pipes.
Year: 1892

page_text: Date of Application, 26th Feb., 1892
Complete Specification Left, 14th Nov., 1892-Accepted, 21st Jan., 18931
PROVISIONAL SPECIFICATION.
Improvements in Tobacco Pipes.
I, HENRY WRAY METCALFE, of the Royal Naval Barracks, Sheerness in the
County of Kent, Engineer Royal Navy, do hereby declare the nature of this
invention to be as follows :-
According to this invention I provide the pipe with a double non-return trap
which prevents juice from entering the mouth and saliva from entering the stem
and bowl.
This double trap forms a connecting piece uniting the stem and bowl to the month
piece and is separable from both.
It consists of a hollow vessel having inside it two tubes in a line with each other
but not meeting. One tube is connected to the stem and its end inside the
receptacle is open whilst the other is connected to the mouthpiece and its end
inside the receptacle is preferably closed but the tube is perforated near its end by
one or more holes for the passage of the smoke. Any juice therefore which may
be drawn down the stem on arriving at the open end of the first mentioned tube
drops into the receptacle and cannot be drawn into the mouth since it cannot get
across the space between the ends of the tubes and even if the pipe be held vertical
the juice cannot drip into the mouthpiece tube being prevented by its closed end.
The tubes may be made conical to fit into or onto the stem and the mouthpiece
or the parts may be screwed together.
In order to enable the receptacle to be cleaned the mouthpiece tube has a hole
or holes bored in it close to its junction with the receptacle. When the mouth-
piece is in place these holes are covered by it but when the mouthpiece is removed
they form openings into the receptacle so that if the latter be stood up upon this
end the juice will drain out of these holes which are now at the bottom. Or the
receptacle may be placed in this position in hot water which quickly cleans it
thoroughly.
J.
1000
81
COMPLETE SPECIFICATION.
Improvements in Tobacco Pipes.
1, HENRY WRAY METCALFE Royal Naval Barracks, Sheerness Kent
Engineer, Royal Navy 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 :--
According to this invention, I provide the pipe with a double non-return trap,
which prevents juice from entering the mouth, or saliva from entering the bowl.
This double trap forms a connecting piece, uniting the stem and bowl to the mouth-
piece and is separable from both.
It consists of a hollow metallic vessel C having inside it two tubes in line with
each other, and concentric with the shell of the vessel, but not meeting. One
tube D is connected to the stem of the pipe A and is hereinafter styled the stem
tube. It reaches nearly to the centre of the vessel, where its end is closed by a
diaphragm G a number of holes being provided F on its outside surface, close to
the diaphragm for the passage of the smoke and juice. The other tube, É herein-
after styled the mouthpiece tube, nearly meets this diaphragm, being open at its
inner end, and is connected with and forms part of the mouthpiece B.

page_text: Any juice therefore, which may be drawn down the stem with the smoke, on
arriving at the closed end of the tube, drops through the lower holes, into the
surrounding receptacle, and cannot be drawn into the mouth, on account of the
orifice of the mouthpiece tube being above its surface, as it lies in the receptacle.
Even if the pipe be held vertically, with the bowl uppermost, the juice cannot be
drawn onward, as the lower portion of the receptacle then holds the liquid, the
surface of which is still below the orifice of the mouthpiece tube.
Nor can the juice then drop direct from the stem tube into the mouthpiece tube,
on account of the diaphragm at the mouth of the former.
In like manner, the juice, or any saliva which may have run down into the
receptacle, is prevented from flowing back to the stem or bowl, by reason of the
holes in the stem tube being above the surface of the collected liquid.
On the mouthpiece and its tube being removed, all the liquid will flow freely out
through the then open end of the receptacle, until now kept closed by the end of
the mouthpiece the receptacle of course being held in a vertical position, orifice
downward.
The stem tube, continued outside the receptacle may be made conical, to fit into,
or onto, the stem of the pipe, or may be made to screw into, or onto, it.
Likewise, the continued end of the receptacle may be made conical, to receive the
end of the mouthpiece carrying the mouthpiece tube, or the parts may be made to
screw together.
The vessel may be removed from both stem and mouthpiece, and placed in
boiling water, or spirit, when necessary, to clean it thoroughly.
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. Utility, in the stopping of the juice from entering the mouth, or returning to
the bowl, and so fouling the pipe, and damping the tobacco, and rendering the
lower part unfit to smoke.
2. Novelty, in the providing an entirely separate receptacle for the juices, which
may be used or not, as desired, & which may be easily cleaned by means not
allowable, where the receptacle forms part of the pipe itself.
3. The introduction of à condenser for cooling the smoke, without using water, or
any substance which needs periodic changing, to ensure efficiency.
Dated this Twelfth day of November 1892.
HENRY WRAY METCALFE.