Improvements in or relating to Heating Apparatus.
Year: 1894

page_text: Date of Application, 29th Nov., 1894
Complete Specification Left, 23rd Jan., 1895-Accepted, 23rd Mar., 1895
Improvements in or relating to Heating Apparatus.
I, JOHN GRUMMITT, of Cherrytree Hill, Sharrow, Sheffield, in the County
of York, Gardener, do hereby declare the nature of this invention to be as
follows:-
My invention relates to improvements in heating apparatus.
The objects of my invention are to prevent the issue of smoke from the heating
apparatus and to lessen the amount of impurities deposited in the boiler forming
part of such apparatus.
I adopt outside the boiler-room an air chamber with a grating in the side thereof;
the chamber otherwise is closed. With the said chamber I connect an air flue
which leads to an air chamber in the floor of the boiler house or in any other
suitable position therein and from thence by means of another air flue the air is led
directly into the ash pit under the fire box entering either at the side or any other
suitable part so that the air circulates therein and improves the combustion of fuel
and so prevents smoke. In the formation of the ordinary heating apparatus such
as saddle boilers the inlet for air is made under the fire bars through the ash pit
door, but in heating apparatus constructed according to my invention the ash pit
door need only be opened for cleaning the bars or for removing the ashes. The
boiler or boilers are fed in the usual manner by a ball cistern arrangement but
between the said ball cistern and boiler I arrange a receiver which is a part of this
invention; it receives the water from the cistern previous to its being delivered
into the boiler, and collects the impurities in the water instead of permitting them
to pass into the boiler. This receiver has a plug screwed or fitted therein in any
suitable manner to enable the sediment to be readily removed when required. The
circulating hot water pipes are arranged in the usual manner for distributing the
heat for greenhouses or other places where heat is required.
The arrangements herein set forth can he readily applied to existing boilers or
heating apparatus.
Dated this 29th day of November 1894.
ALFRED J. BOULT,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to Heating Apparatus.
I, JOHN GRUMMITT, of Cherrytree Hill, Sharrow, Sheffield, in the County
of York, Gardener, 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 following statement:―
My invention relates to heating-apparatus the objects being to prevent the issue
of smoke to diminish the consumption of fuel and to lessen the amount of
impurities deposited in the boiler when it forms part of the apparatus.
In the accompanying drawings,

page_text: Fig. 1 is a front elevation of an improved heating apparatus and its appurtenances,
constructed according to my invention.
Fig. 2 is a side elevation partly in section of the apparatus illustrated in Fig. 1,
like letters indicating like parts in both figures.
A is a setting, within which is a boiler B of the well-known "saddle" type.
A is part of the wall of the fire-room or stokehold and C D and E are the usual
fire ashpit and flue doors respectively. F is the chimney and G a damper therein,
any convenient arrangement of flues being provided to lead the furnace gases to
the chimney.
Outside the fire-room is an air chamber H closed except for au air inlet H' in
which is a grating H2 and within the fire-room is an air chamber I provided with a
cleaning-door 1' and connected with the air-chamber H by a conduit H in which
is a valve H. A² are flues preferably formed in the boiler seating which convey
air from the chamber I into the ashpit; this chamber may be situated as shown or
in the floor of the boiler-room or in any other convenient position, and the flues A²
may open into the ashpit at the rear as indicated at A' or at any other point. And
although I have described the air-chamber H and I as being respectively outside
and inside the boiler-room I may place them otherwise as may be desired.
J is the usual supply cistern for the feed-water. K is a receiver connected with
the cistern J by the pipe J' and with the boiler by the pipe K' as shown.
K' is
a drain cock on the receiver K. Other means instead of or in addition to the drain
cock may be provided on the receiver K to facilitate the removal of impurities
therefrom.
When this apparatus is in use a draught regulatable by the damper G and
valve H is set up by the fire under the boiler so that air is drawn through the
inlet H¹ and grating H2 into the external chamber H and thence through the
conduit H³ chamber I and flues A' into the ashpit at A³, and into the fire to
improve the combustion and to prevent smoke. The water supply for the boiler
passes through the pipe J' from the cistern J to the receiver K wherein before
passing to the pipe Kit mingles with hotter water circulated back through the
pipe K from the boiler, the result being that most of the impurities in the feed are
deposited in the receiver where they do no harm instead of in the boiler in which
they would be very injurious. The impurities thus deposited can be drained from
the receiver through the drain cock K2 at intervals, or otherwise removed. By
closing the valve H the air supply by way of the chambers H and I can be shut
off, in which case the flow of air to the ashpit would be controllable in the usual
manner by the ashpit door or a valve therein; but when air is being drawn through
those chambers the door D would be kept closed except to permit the withdrawal
of ashes. I may dispense with either the valve H or the damper G, and use only
one of them to regulate the draught in the apparatus, or instead of or in conjunction
with them I may use only other valve in the air passages.
My improvements herein described with reference to their application to a
"saddle" boiler are not limited to that particular application but are applicable to
other boilers.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is ;-
1. In heating-apparatus the combination with a furnace of an air-supply system
comprising an air-receiving-chamber H a conduit H³ an air-chamber I Hues A' and
means for regulating the passage of air through the system substantially as
described.
2. In heating-apparatus the combination with a boiler of feed-water supply
apparatus comprising an intermediate receiver K arranged and operating
substantially as and for the purpose described.
3 In heating-apparatus the combination with a boiler of feed-water supply
apparatus comprising a supply cistern J an intermediate receiver K and pipe such

page_text: as K¹ connecting the boiler with the receiver and circulating the water between
them substantially as described and illustrated in the accompanying drawings.
4. The combination and arrangement of parts constituting a complete heating-
apparatus substantially as and for the purposes described and illustrated in the
5 accompanying drawings.
Dated this 22nd day of January 1895.
JOHN GRUMMITT.
Boult & Wade,
Agents for the Applicant.