Improvements in Air Heating Stoves.
Year: 1889

page_text: Date of Application, 2th Dec., 1889-Accepted, 1st Feb., 1890
COMPLETE SPECIFICATION.
[Communicated from abroad by ROBERT THOMSON, of Sathgao Tea Estate, South
Sylhet, in the Empire of India, Tea Planter.]
Improvements in Air Heating Stoves.
I, GEORGE MACAULAY-CRUIKSHANK C.E. of 62 Saint Vincent Street, in the City
of Glasgow, Registered Patent Agent and Fellow of the Institute of Patent Agents,
do hereby declare the nature of this invention and in what manner the same is to
be performed, as communicated to me to be particularly described and ascertained in
and by the following statement :-
This Invention relates to stoves for heating air, and it has for its object to produce
and deliver a continuous current of air at a high temperature with a small expenditure
of fuel. The improved stove, whilst generally applicable where a current of heated
air is required, is especially adapted for use in drying tea and like substances and as
seen in front end elevation at figure 1 in transverse section at figure 2, in longitudinal
section at figure 3 and in part horizontal section and part plan at figure 4 of the
annexed drawings it consists of a base or foundation A around which a series of
holes B are made for the ingress of air from the atmosphere-In the top of the
base A other holes Caro formed through which the incoming current passes up-
wards into enclosed chambers or spaces D each of which extends vertically from
the base A to the crown plates E to both of which the chambers are bolted air
tight and longitudinally from the front to the back of the stove-On the drawings
three such chambers are shewn on each side of the furnace F but a greater or
lesser number may be employed, dead plates G constituting the walls of the furnace
being inserted to prevent the flames from coming into direct contact with the
nearest air chambers D. The base A is composed of two sections connected
together by a plate or plates H which also constitutes an ash plate for the furnace F
the latter being covered with arched radiator plates 1, to direct the products of
combustion through openings J, formed at the upper ends of the inner air heating
chambers D-These openings each lead into a space or flue K situated between
the inner and the mid air chambers D the products of combustion being conducted
down the said flue and thence passing through similar openings J at the lower
ends of the mid air heating chambers into the space or flue K between the mid
and outer chambers D thence through openings J' into the flue or space K³
between the outer chambers and the casing P from the lower part of which space
they pass out of the stove through openings L into the flue pipes M by which they
are conducted into the smoke box N constituting the base of the chimney. The
crown plates E have a series of holes O above each air chamber D and through
which the upward air current heated by the passage of the products of combustion
as above described is discharged from the stove at a high temperature.
In the casing P cleaning doors are arranged at the bases of the flues K, K', K²,
as shewn at Figure 1.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed, as communicated to
I declare that what I claim is :-
ine,
1. The general arrangement and combination of parts constituting the improved
air heating stove hereinbefore described with reference to the drawings annexed.
2. In an air heating stove the combination of the base plate A with air inlets
therein and the vertical air chambers D connected thereto and to crown plates E and

page_text: having at their upper and lower ends alternately transverse openings J J' J³ for the
passage of the products of combustion into and through flues K, K, K", substantially
as described with reference to the accompanying drawings.
Dated this Twenty fourth day of December 1889.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow, Agents. ·