Year: 1898

page_text: Date of Application, 25th May, 1898
Complete Specification Left, 12th July, 1898-Accepted, 17th Sept., 1898
I, THEOBALD MATHEW FRASER, 27, Avenue Elmers, Surbiton, Surrey, Gentle-
man, do hereby declare the nature of this invention to be as follows:-
A device for obtaining boiling liquid instantaneously in any quantity by means
of a portable cylindrical metal case, having, as its under surface, a spirit lamp
attached by a hinge; and containing metal tubing, slightly flattened, arranged in
spiral coils descending from a funnel-shaped opening in the upper surface of the
metal case, the spiral coils gradually increasing in circumference from the upper
opening, then decreasing, and then again increasing, and the tube finally emerg-
ing from the lower part of the side of the metal case; the whole being so arranged
that when liquid is poured into the funnel at the top of the case, it will, during
its passage through the tubing, be heated by the spirit lamp below.
The 041
J
1000
man,
I, THEOBALD MATHEW FRASER, of 27, Avenue Elmers, Surbiton, Surrey, Gentle-
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 fol-
lowing statement; —
It is a device for obtaining boiling liquid instantaneously in any quantity by
means of a portable cylindrical metal case, closed at one end, open at the other;
containing metal tubing slightly flattened, arranged in spiral coils, descending
from an opening in the upper surface of the metal case; the spiral coils gradually
increasing in circumference from the upper opening, then decreasing, and then
again increasing; the tube finally emerging from an aperture in the lower part
of the side of the cylindrical metal case. To the lower or open end of the metal
case a spirit lamp to be attached by a hinge. The tubing within the metal case
is to be of such length and diameter that when liquid is poured into the opening
in the upper or closed end of the case, it will during its passage through the tubing
be so heated by the flame of the spirit lamp attached to the open or lower end of
the case as to emerge from the aperture in the lower part of the side of the case
in a boiling condition. The metal case should have apertures round the lower
part of its sides and also round the outside edge of the upper or closed end sufficient
for the passage of air for the flame of the lamp below. Round the aperture of

page_text: the tube in the upper or closed end of the metal case should be a raised rim encircl-
ing the aperture of the tube, but at a little distance from it, so as to direct the
passage or liquid more easily into the tubing. The lamp below may be spirit,
oil, gas, or of any nature, but spirit is preferable for the sake of portability.
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. That the above described manner of coiling slightly flattenned tubing in
spiral coils, the coils gradually increasing in circumference, then decreasing in
circumference, and then again increasing, so as to be thoroughly exposed to a
flame below, and so that when liquid is poured through it becomes heated to boil-
ing by a flame below, is an improvement on existing apparatus.
2. That the production of the above apparatus in portable form is novel.
3. That the above described apparatus is a novel improvement in portable
apparatus for quickly heating liquids.