Year: 1888

page_text: Date of Application, 10th Feb., 1888
Complete Specification Left, 10th Nov., 1888
Complete Specification Accepted, 14th Dec., 1888
I, JOHN WATSON, of St. Albans, in the County of Herts, Florist, do hereby declare
the nature of my said invention to be as follows:-
This invention relates to that class of horticultural boilers for which Letters Patent
No. 46297 and No. 156 were granted to me; and the object of my present invention
is to effect further improvements in such boilers.
The boiler is of the horizontal type, and the sectional form of the outer shell
approximates to that shewn in my said former Patents, being wide towards the crown,
and tapering towards the bottom. The upper part may be formed angular in section,
or semicircular, or otherwise curved.
Running from end to end, and open at each end, is a horizontal tube, preferably
circular in section.
The lower plates of the boiler, which have to sustain the greatest heat of the furnace,
are made of steel, or annealed iron, in lieu of ordinary boiler plate, and the junction of
these plates with the remainder of the boiler shell is effected by means of welding,
brazing, or otherwise.
The boiler is fixed from below, and the heated gases are caused to circulate and
travel over every part of the effective heating surface, so as to render the same
economical in fuel.
Dated 10th February 1888
GEO. DOWNING,
Agent for Applicant.

page_text: Improvements in the Construction of Horticultural Boilers.
I, JOHN WATSON of St. Albans in the County of Herts, Florist, do hereby declare
the nature of my said invention and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement :-
This invention relates to that class of horticultural boilers for which Letters Patent
No. 4629 and 15684 were granted to me and the object of my present invention is to
effect further improvements in such boilers.
The boiler is of the horizontal type and the sectional form of the outer shell
approximates to that shown in my said former patents, being wide towards the
bottom.
The upper part may be formed angular in section, or semicircular or otherwise
curved.
Running from end to end, and open at each end, is a horizontal tube, preferably
circular in section.
The lower plates of the boiler, which have to sustain the greatest heat of the furnace
are preferably made of steel, or annealed iron, in lieu of ordinary boiler plate, but I
do not confine myself to the use of those materials, and the junction of these plates
with the remainder of the boiler shell is effected by means of welding rivetting,
brazing, or otherwise.
The boiler is fired from below, and the heated gases are caused to circulate and
travel over every part of the effective heating surface, so as to render the same
economical in fuel.
And in order that my said invention may be particularly described and ascertained
reference is hereby made to the accompanying drawings in which similar letters of
reference indicate corresponding parts.
Fig. 1 is a front view, and Fig. 2 a longitudinal elevation, showing one form of my
invention; and Figs. 3 and 4 are similar views of another form.
In Figs. 1 and 2 the upper part of the boiler consists of three flat plates running
from end to end, and in Figs. 3 and 4 the upper part of the boiler is of a form slightly
exceeding a semi circle as shown in Fig. 3.
a, a are the plates forming the external shell of the boiler, b b are the lower plates
which are preferably made of steel and c, c are the flues.
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 :-
The manufacture and use of horticultural boilers constructed in the manner substan-
tially as herein before described and illustrated by the drawings.
Dated 10th November 1940
Dated 10th Novemba 1000
GEO. DOWNING,
8, Quality Court, Chancery Lane, W.C.,
Agent for Applicant.