An Improvement in Open Fire Grates and Register Stoves for the Abatement of Smoke.
Year: 1892

page_text: Date of Application, 10th Nov., 1892
Complete Specification Left, 10th Aug., 1893-Accepted, 2nd Dec., 1893
PROVISIONAL SPECIFICATION.
An Improvement in Open Fire Grates and Register Stoves for the
Abatement of Smoke.
I THOMAS EDWARDS PARKER, 82 Earlsfield Road, Wandsworth, S.W.
Surrey, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention consists of a louvred or perforated back to the fire basket under
which last named and at the sides when necessary and behind the before mentioned
perforated back is a space which I shall describe as an air well or heated chamber,
the cubical contents of it being in proportion to size of the fire basket. By the
action of the fire, the air passing through the before mentioned chamber becomes
highly heated and by expansion and natural effects the heated air exudes through the
perforations and mingles with the gases of the fuel starting them into flame.
To ensure the mixing of the hot air from the chamber with the gases of the fuel,
a deflector is provided on which the mixture impinges and the conditions of
combustion are thereby effectively improved.
The supply of air to the before mentioned air well can be obtained under
the grate or at the sides or from any external source which is found most
convenient.
With the combination herein described, I claim to have discovered an effective
method for the abatement of smoke in open fire grates and register stoves.
Dated this Tenth day of November 1892.
T. E. PARKER.
COMPLETE SPECIFICATION.
An Improvement in Open Fire Grates and Register Stoves for the
Abatement of Smoke.
I THOMAS EDWARDS PARKER, 17 Westover Road, Wandsworth, S.W.,
Surrey, Engineer late of 82 Earlsfield Road, Wandsworth, S.W. 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 consists of a louvred or perforated back to the fire grate or stove
at the rear of which is an air-well or chamber of ample size and in proportion to the
quantity of fuel the said grate will hold.
By the action of the fire, the air in the aforesaid well or air chamber is subjected
to a roasting heat and thereby a current of hot air is established by rarefaction and
expansion.
The top of the aforesaid air-well is made to slope or curve downwards towards
the fuel and the hot air is forced to meet the gases which arise from the fuel
immediately they are created and starts them into flame.
In this manner the said gases are more readily oxidized, improved combustion is
effected and a diminution of smoke is the result.
To secure the admission of air into the aforesaid chamber or air-well, I provide
air passages under the grate or at the sides, or through the wall, or from whatever
source it is found convenient to obtain it for that purpose.
In order to economize fuel and make the combination of the aforesaid perforated
back and air-well more efficient, I fix a baffle in the throat of the flue which is made
to slope upward and towards the front of the grate and by this means the heat
077

page_text: units generated at the back of the fire are brought forward, the draught to the
flue being obtained through a narrow slot at the top of the front portion of
the grate.
To make my invention more clear I append herewith sketches showing a
vertical section of the apparatus and an outline of the grate as seen from the
front.
A is the air-well, B is the fire basket C air passage to well or air-chamber A
D sloping top or deflector, E baffle plate to throttle the flue, F flue uptake,
G shows the louvre bars and H the canopy or hood.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is :-
1. The combination of parts arranged and employed in the manner as hereinbefore
described and illustrated in the accompanying drawings constituting a grate or stove
for burning bituminous coal or other solid fuel.
2. A fire back such as G employed in the manner and for the purpose hereinbefore
set forth.
3. A grate or stove in which is comprised an air well A, a fireback G, a
deflector D, and a baffle plate E combined and arranged in the manner hereinbefore
described and illustrated in the accompanying drawings.
Dated this Tenth day of November 1893.
DUA TAT
T. E. FARKER.