Year: 1894

page_text: Date of Application, 24th Mar., 1894
Complete Specification Left, 16th Jan., 1895-Accepted, 16th Mar., 1895
DAVID MCINTOSH SHAW, 29 Charles Street Inverness N.B. Mechanical
Dentist aud Dental Pupil, do hereby declare the nature of this invention to be as
follows:-
The construction of tobacco pipes in a new manner whereby the distance or
length of channel through which the smoke must pass from the bowl to the
mouthpiece is greatly increased without adding to the general bulk or dimensions
of the pipe, & in such a way that all the channels or smoke-passages are straight
from end to end and open at both ends, so that they may be easily and thoroughly
cleared and cleaned, and also having a receptacle for the interception of
objectionable products, adjusted in a novel way; these results being secured by
having a hole or passage, beginning at the end of the stem nearest the mouth-
piece, bored or carried straight along and through the material (wood, clay or
other suitable substance) composing the stem and lower part of the head-without
so far entering or communicating with the bowl-until it emerges at that part of
the pipe-head base which is furthest away from the stem, and, another hole or
passage being made from the base or bottom of the bowl (preferably beginning
at that side of the bowl which is nearest the stem), and bored or continued
downward in a direction at or about right angles to the first-mentioned hole or
passage, but in such a manner that the axes of both holes or passages do not lie
in the same plane (that is, that the passages do not intersect or communicate with
one another internally) until it terminates and opens at the base of the pipe-
head; these two holes or channels communicating with, or being joined to, one
another only at that end of each which opens upon the lower part and outside of
the pipe-head, such communication being effected either by a third hole or passage
bored or made in and through the material of the lower part of the pipe-head,"
or, preferably, by a suitably adjusted and detachable tube of metal, clay, pumice
stone, or other material; the whole arrangement being intended to secure, among
other advantages, such ones as, first, that all the smoke passages are quite
straight (with the exception of the removable tube) and accessible from both ends,
so that they may be readily and thoroughly cleared and cleaned by passing an
instrument (such as a wire, straw and the like) from one end straight throughout
to the other; second, that the distance or length of passage or passages through
which the smoke must pass from the bowl to the mouthpiece is made at least twice
as great as the distance the smoke must travel between the corresponding
extremities of an ordinary tobacco pipe having the same bulk and general
dimensions; thirdly, the detachable tube is of a width and length favourable to
condensation of smoke vapours and to receive and retain all objectionable liquid
products, while its situation and upward curve (through which the smoke must
ascend) enables the tube to intercept and retain the nicotine, a body which, con-
densing at a relatively high temperature, is always found to collect most readily
and in greatest quantity near the bowl; lastly, the detachable tube may be made
of clay, asbestos, pumice stone, or other absorbent substance and supplied
separately at a trifling cost, so that a dirty tube may be discarded and replaced by
a new one.
Dated this 22nd day of March 1894.

page_text: DAVID MCINTOSH SHAW 17 Denny Street (late of 29 Charles Street)
Inverness Dental Pupil do hereby declare the nature of this my invention for
an improved tobacco pipe and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement :-
A piece of wood or other suitable material is shaped externally into the form of
a tobacco pipe, the stem being of suitable and convenient length. A bowl (A) or
hollow for containing tobacco is formed in the ordinary way and of moderate
depth. A hole or passage SP, beginning at the end (S) of the stem nearest the
mouthpiece, is bored or carried straight along and through the material composing
the stem and lower part of the pipe-head, without so far entering or communicating
with the pipe bowl, until it ends and emerges at that part (P) of the pipe-head
base which is furthest away from the stem. Another hole or passage (B D) is
made from the interior base or bottom of the bowl (preferably beginning or
opening upon that side (B) of the bowl which is nearest to the stem), and bored or
continued downwards in a direction at, or about, right angles to the first mentioned
hole or passage, but in such a manner that the axes of the two holes or passages do
not lie quite in the same plane, (that is, the passages do not intersect or com-
municate with one another internally), until it emerges at & opens upon (D) the
base of the pipe head. These two holes or passages communicate, or are connected
with one another only at that end of each which is at & opens upon the lower part
& exterior of the pipe head ;-such communication being effected by a suitably
adjusted and removable tubular passage (T) of metal, clay, pumice, or other
material.
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. The two fixed smoke passages are straight, and open at both ends, so that a
cleansing apparatus can easily be passed through and through.
2. The distance travelled by the smoke is much increased without adding to th
general dimensions of the pipe.
3. The removable tubular passage acts as an effective condenser of injuri
vapours and products of consumed tobacco. This condenser is readily cleansed
4. The situation of the condensing tubular passage, and the size of the
averaging one and a quarter inches in length and one quarter inch in diar
are together most favourable to the interception and retention of objecti
products of combustion, while permitting the easy passage of aromatic pro
& vapours of burnt tobacco.
Dated this 22nd day of December 1894.