Year: 1898

page_text: I, EDMUND WALTER THURGAR, of 15, Grenville Street, Brunswick Square, in
the County of London, do hereby declare the nature of this invention to be as
follows:
My invention relates to the construction of tobacco pipes described in the
Specification to my Patent No. 952 of 1896, in which the bottom of the pipe
bowl was made as a cup separable from the upper part, and was formed with a
central chamber that communicated with the bowl and by a small lateral hole,
with an annular chamber surrounding it, that communicated with the passage
in the stem leading to the mouth piece.
According to one of my present improvements, instead of making the stem of
such pipes in one with the upper part of the bowl as described in the said
specification, I make it in one piece with the lower part or cup of the bowl,
thereby on the one hand rendering the pipe of better appearance, and on the
other hand facilitating the cleansing of the cup and stem from sediment as on
removing the upper part of the bowl and the mouth piece, the cup and stem can
be readily rinced in water.
According to another improvement, I form in the stem a long chamber of
greater capacity than the before mentioned annular chambers in the cup, and
to the end of the mouth piece I fix a tubular extension of small diameter, that
extends down such chamber to near the end thereof. By this arrangement if
the pipe should be held or placed in such a more or less upright position that
the liquid which collects in the annular chamber can flow down into the stem
it will not be sufficient in quantity to fill this and consequently it will be
prevented from flowing into the inner end of the tubular extension and through
the latter into the mouth piece.
In come cases I interpose between the said tubular extension and the channel
leading from the end of the chamber into the bowl, a partition extending some
distance up the chamber, so that the smoke entering the chamber first has to pass
forward in the space underneath the partition, and then backward again along
the space above the partition before it can enter the tubular extension. By
this means on the one hand a greater cooling of the smoke is effected and on
the other hand particles of tobacco or ashes and liquid are prevented from being
drawn by the suction directly from the bowl channel into the tube and mouth
piece.
I also in some cases fix to or provide the tubular extension with a small
baffle plate situated in front of its orifice or I fit over the latter a perforated
or wire gauze cap for preventing particles of tobacco or ashes from being drawn
in. For the same purpose I may also provide the upper end of the central
chamber of the cap with a perforated metal or fine metal gauze cap that extends
over the small lateral hole through which the central chamber communicates
with the outer annular chamber and the latter may also be provided with a
wire gauze or perforated metal covering just below the small lateral hole.

page_text: Or I provide in the annular chamber a small tube leading upward from the
opening of the channel leading into the pipe stem, and I fit à perforated or
wire gauze cap on the upper end of this tube.
Dated this 19th day of November 1898.
ABEL & IMRAY,
Agents for the Applicant.
I, EDMUND WALTER THuRGAR, of 15, Grenville Street, Brunswick Square, in
the County of London, 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:-
My invention relates to an improved construction of that kind of tobacco pipes
in which the tobacco bowl communicates at bottom with two concentric chambers
through which the smoke passes on its way to the pipe stem and mouth piece.
I will describe my improved construction of such pipes with reference to
the accompanying drawings, in which Fig. 1 shews a longitudinal section of the
pipe, Fig. 2 shews a section of the bottom cup and stem detached, and Fig. 3
shews a plan view of the same.
The pipe consists of a bowl A of briar wood or other suitable material the
bottom hole of which has a small tube B fixed into it that projects down into the
central cylindrical chamber C of the bottom part or cup I of the pipe which is
separate from the bowl and secured to it by screwing as shewn and which is
formed in one with the stem J.
The upper end of the cylindrical chamber C fits into a corresponding groove H
in the bottom of the bowl.
Surrounding the central chamber C is an annular chamber D, which communi-
cates with C by means of a small opening E near the top of the chamber C.
At a point diametrically opposite the opening E, the chamber D communicates
with a chamber F formed in the pipe stem J by means of a small upward directed
tube K. The chamber F of the stem is made of such a size that it can contain
more liquid than could be contained in the two chambers C and D if both were
full.
The end of the chamber F is closed by the mouthpiece G from the inner end
of which a small tube L extends forward to near the front end of the chamber F.
The combined cup I and stem J are preferably moulded in vulcanite, they
may, however, be formed of any other suitable material.
The action of the above described pipe is as follows:-
The tobacco being lighted, its smoke is first drawn down into the central
chamber C, whence it passes through hole E into the outer chamber D and thence
through tubular passage K into the chamber F. From this the smoke is drawn
through tube L into the mouthpiece G. The moisture of saliva from the mouth
passing from tube L into chamber F passes thence through tube K into chamber D
and is retained there instead of passing into the tobacco how! A, as is the case with
ordinary pipes.
All particles of tobacco, the nicotine or oil and moisture of the tobacco, unmixed
with saliva, pass into the central chamber C through tube B, and are securely
retained there and prevented from passing into the stem chamber F and mouth
piece.
This is insured by the fact that the oil of tobacco being sticky and thick,

page_text: adheres to the bottom and sides of the chamber C and catches all the particles of
tobacco and ashes that may enter through tube B and this mass is still further
thickened by the considerable heat conducted down from the bowl so that the
mass eventually cakes and becomes hard and consequently cannot run into the
outer chamber D.
On the other hand, it will be seen that no matter what position the pipe may
be held in, the liquid caught in the chamber D cannot pass either back into the
mouth piece G nor into the tobacco bowl; thus supposing the pipe were inverted
in its horizontal position, so that the cup I is uppermost, the liquid in D,
although it might, if present in sufficient quantity, pass through hole E, into C
will be prevented from passing into the tubular passage B as this would project
upward above the liquid.
On the other hand, if the pipe were held in a more or less inclined position,
with the mouth piece downward, the liquid in D would require to be present in
considerable quantity before it could enter the upward directed tube K, and
should it flow through this into the chamber F, which would be in a downward
inclined position the upward projecting tube I would effectually prevent any
liquid from penetrating into the mouth piece.
It will be seen from the above that with this improved construction of pipe
the advantages are obtained firstly that the penetration of all liquid and solid
particles from the pipe into the mouth is effectually prevented, secondly, as no
moisture from the mouth can penetrate into the tobacco bowl no part of the
tobacco is liable to become damp, and it will consequently be completely con-
sumed in smoking, preventing all waste; thirdly the pipe can be readily and
effectually cleaned by unscrewing the howl and mouth piece and placing the
vulcanite cup and stem in water and rincing it and if necessary scraping out any
adhering matter; fourthly, the tube B of the bowl, which is the only part which
is liable to become choked, can then also be readily cleared; fifthly owing to
the circuitous and narrow passages which the smoke has to pass through, it will
give off nearly all its heat to the pipe before entering the mouth, and will
consequently be inhaled in a cool condition; lastly, as the parts of the pipe
below the bowl are all hollow and the walls thin, the pipe will be comparatively
light. Although I have shewn the pipe with a straight stem by way of example
it may also be made of any desired curved form,, without interfering with the
above described action. I am aware that pipes have already been constructed with ·
a bowl separable from a bottom cup formed in one with a stem containing
a chamber, and I do not claim such a combination of parts generally.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed, I declare that what
1 claim is:
In a pipe, the combination of a tobacco bowl, A, a cup I separable from the
bowl and formed in one with the stem J, a tube B projecting down from the
bowl into a central cylindrical chamber C of the cup, an outer annular chamber D
in the cup communicating with the central chamber by a hole E in the wall
of the latter, a chamber F in the stem J, communicating with the annular chamber
of the cup by an upward projecting tubular passage K and a mouth piece G with
tubular extension L projecting into the chamber of the stem J substantially as
and for the purposes described.