Improvements in Fire Grates and Stoves.
Year: 1894

page_text: PROVISIONAL SPECIFICATION.
Improvements in Fire Grates and Stoves.
I HARRY HUNT of Newington Green in the County of Middlesex Engineer do
hereby declare the nature of this invention to be as follows:-
This invention relates to an improved construction of fire grate (preferably of
the class called hot air grates or stoves) for burning hard coal (anthracite) or coke
and as a smoke consuming grate for burning bituminous coal, also for curing down
draft in smoky chimneys.
The improvements may be adapted to existing fire places, as well as in the
construction of new ones.
In carrying this invention into effect, I construct a fireplace or stove, with open
front and back made of firebrick or of metal forming an air-warming chamber.
In front of said back I fix a false back, preferably with top part projecting
forward, and a clear flue way under its lower portion and up back, the upper part
of this back flue I divide with an iron plate, to which is attached a hinged damper
or flap, which stops all direct front access to chimney, but can be opened for
sweeping, thus leaving the clear fineway for products of combustion to pass under
false back up to chimney, or over false back under division plate up behind flap
forming a siphon shaped flue into chimney. To control these two flueways I fix
behind the false back a rocking damper worked by a rod through front frame,
which operates the flues, for quick draft through fuel under bottom of projecting
back, or for slow draft by the siphon shaped flue into chimney, so constructed that
both flue ways cannot be closed simultaneously. For reparation the false back can
be made to take out from front without unfixing or removing the stove. I form
the bottom grating so that it can be shaken, which is necessary for burning
anthracite. And the ashes tray or guard I construct with a flap or valve so that
it will admit plenty of air to the grate for burning anthracite or can be closed for
burning bituminous coal.
I, HARRY HUNT of 4 Newington Green in the County of Middlesex Engineer
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 :-
This invention relates to an improved construction of fire grate, (preferably of
the class called hot air grates or stoves) for burning hard coal, (anthracite) or coke,
and as a smoke consuming grate for burning bituminous coal, also for curing down
draft in smoky chimneys, the improvements may be adapted to existing fireplaces
as well as in the construction of new ones.
In order that my invention and the means by which the same may be carried into
practical effect may be thoroughly understood, I shall proceed to describe the same

page_text: in detail, referring in so doing to the accompanying drawing which is to be taken
as part of this Specification and read therewith.
The annexed sheet of drawings represents a sectional view of a firegrate, made
according to this invention.
As referred to in this drawing I construct a fireplace, (or stove) with open front,
he back marked A, shewing air warming chamber, cold air is admitted at the
bottom and warmed by passing as shewn by arrowheads on its way to be emitted
through front panel, or the back A, can be made in solid fire brick without the air
chamber, in front of said back A, Í fix a false back B, made either of firebrick or
metal, preferably with top part projecting forward as shewn, and a clear flue way C.
under its lower portion and up back in direct communication with chimney, the
upper portion of back flue way behind top of B. is bisected with an iron plate D,
carrying on its upper part a flat damper E, which is kept shut to stop all front
access to chimney but can be opened for sweeping, as shewn by dotted lines;
behind false back B. is attached a rocking damper F. operated by a rod G. passing
through front frame with knob, this rod when in position as shewn leaves the
bottom flue C. open for quick draft specially suited for burning anthracite, or
rod G can be pulled out as marked by dotted lines, which closes bottom portion of
flue way C. and opens flue way c. for slow draft in which case the products of
combustion ascend from fuel in front of plate B. pass down flue way c. and under D,
up back to chimney thus forming a syphon shaped flue to prevent down draft in
smoky chimneys, or the rod G. can be operated to any degree between quick & slow
that may be necessary to suit the fuel or the requirements for warmth, it is so
constructed that both flues cannot be simultaneously closed.
The bottom grate H. is carried on trunnions h. so that it can be tilted or shaken
which is necessary for burning anthracite coal, on the front of said grate H. I hang
or pivot an economiser flap I, which falls against the projection J, formed by part
of ashpan K, this flap serves to stop front draft to ashpit for economy and the
better combustion of the fuel, or it can be opened by withdrawing the ashpan when
necessary, any cinders or ashes that fall from the front bars, are caught by the
projecting front of tray and pass through flap into ashpan; the flap I, can be
hinged or pivotted to sides of fireplace front, or to ashpan, as may be found most
convenient.
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. In a fireplace the combination of a false back preferably having its upper part
inclined forward with flue way behind it bisected by a plate carrying a flap
damper and back flues operated by a rocking damper, substantially as described.
2. The combination of an economiser flap hinged to grate, frame, or asbguard,
acting against a projecting part of ashes tray substantially as set forth.
3. Fireplaces constructed substantially as hereinbefore described and illustrated
in the annexed drawing.
Dendi 4
1
A 1 1005