IMPROVEMENTS IN PORTABLE BLOW-PIPE APPARATUS
Year: 1854

page_text: LETTERS PATENT to Charles Chapel Davis, of Bath, in the County of
Somerset, Gas Engineer, &c., for the Invention of "IMPROVEMENTS IN
PORTABLE BLOW-PIPE APPARATUS."
Sealed the 16th June 1854, and dated the 18th April 1854.
PROVISIONAL SPECIFICATION left by the said Charles Chapel Davis
at the Office of the Commissioners of Patents, with his Petition, on the
18th April 1 54.
.I, CHARLES CHAPEL DAVIS, of Bath, in the County of Somerset, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN PORTABLE BLOW-
PIPE APPARATUS" to be as follows:-
The improvements consist in a mode of arranging an air vessel to supply
atmospheric air to a mouth-piece applied to a portable burner, in combination
with means for adjusting the position of such mouth-piece in relation to the
flame from the burner.
The air vessel is formed by end surfaces connected by flexible air-tight
material, producing a chamber capable of expanding and collapsing, as bellows.
The expansion of this chamber to draw in air thereto through a suitable valve
is effected by a spring or springs; the collapsing thereof to force the air there-
from is effected by the air chamber or vessel being placed between the knees
or under one foot of or otherwise being acted upon by the operator, when the
air will be forced out by another channel through a tube of vulcanized india-
rubber or other flexible air-tight material to the mouth-piece applied to the

page_text: portable burner used. The mouth-piece is capable of adjustment on the burner
tube, in order to conduct the jet of air therefrom upon the jet of flame in the
direction desired.
The burner may simply consist of a socket or holder for rushes or other
matters to be ignited, with means of forcing such matters into position as con-
sumed; or it may be arranged to burn naptha spirit, or be supplied with gas by
a suitable flexible tube from an adjacent main.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Charles Chapel Davis in the Great Seal Patent Office on the
18th October 1854.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
CHAPEL DAVIS, of Bath, in the County of Somerset, Gas Engineer, &c., send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighteenth day of April, in the year of our Lord
One thousand eight hundred and fifty-four, in the seventeenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Charles Chapel Davis, Her special licence that I, the said Charles Chapel
Davis, my executors, administrators, and assigns, or such others as I, the said
Charles Chapel Davis, my executors, administrators, and assigns, should at any
time agree with, and no others, from time to time, and at all times thereafter
during the term therein expressed, should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain and Ireland,
the Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
PORTABLE BLOW-PIPE APPARATUS," upon the condition (amongst others) that I,
the said Charles Chapel Davis, by an instrument in writing under my hand
and seal, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and cause the
same to be filed in the Great Seal Patent Office within six calendar months
next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Charles Chapel Davis, do hereby declare
the nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof (that is to say):-
The improvements consist in a mode of arranging an air vessel to supply
atmospheric air to a mouth-piece applied to a portable burner, in combination

page_text: Figure 1 shows an external view of the apparatus complete. A is the air
vessel, which is composed of the two end pieces a, a, and the flexible surface b,
which surface I by preference form of leather, but vulcanized india-rubber or
other suitable flexible air-tight material may be employed. c is a coiled spring,
which at all times tends to separate the end pieces a, a. a¹ is an inlet valve,
by which air may flow into the chamber formed by the surfaces a, a; and b, d,
is an outlet, opening to the passage e in connection with the flexible pipe f, by
which air, when forced by the collapsing of the chamber A, may be conducted
to the pipe B, the end of which is bent over at B', forming a mouth-piece to
direct the jet of air, as required, against the flame produced from the combustion
of matters carried by the burner tube C.
The pipe B passes through a socket (1) carried by the tube C, with a capa-
bility of adjustment and of being set by a set screw (2), as shewn. The
matters employed to produce a flame by combustion as they pass out from the
tube C may be rushes saturated with tallow, as is now the practice when using
an ordinary blow-pipe; but I prefer to use for this purpose a candle 'formed
with a wick of considerable thickness and coated with tallow, and I force such
matters up the tube C as consumed by means of a slide (3), which has knobs
or projections (4) on the outside of the tube C; but this may be varied. It
will be seen that the end B' of the tube B is capable of being readily shifted,
so as to direct the air from the apparatus A on either side or over the jet of

page_text: flame produced by combustion of the matters carried by the tube C, to suit
the different positions in which it may become necessary to hold the parts B, C.
The parts B and C are in use, held by the operator, as is shewn by the Sketch,
Figure 2, where D represents a piece of solder being applied to parts being
soldered. Figure 3 shows an under side view of the parts A. Figure 4 shows
another side view of the parts B, C, of Figure 1; and Figures 5 and 6 are
sections through (5) (5) and (6) (6) respectively. The burner may, however,
simply consist of a socket or holder for rushes or other matters to be ignited,
with means of forcing such matters into position as consumed; or it may be
arranged to burn naptha spirit, or be supplied with gas by a suitable flexible
tube from an adjacent main.
Figure 7 shows an external view of a case formed of tin or other suitable
material for holding the part A in à compressed state with the flexible tube
to facilitate carriage. The dotted line indicates a projection for opening
the valve a¹ when compressing the apparatus A, so as to admit of the escape
of the air contained therein. .y, y, are spring clips to retain the cover a on
the case.
Having thus described the nature of my said Invention, and the best means
I am acquainted with for carrying the same into effect, I would have it under-
stood that I do not confine myself to the precise details shewn and described,
so long as the peculiar character of my Invention be retained, as herein
explained.
In witness whereof, I, the said Charles Chapel Davis, have hereunto set
my hand and seal, this Fourteenth day of October, in the year of our
Lord One thousand eight hundred and fifty-four.
Witness,
CHARLES EDMUND DAVIS,
of Bath.
CHARLES CHAPEL DAVIS. (L.S.).