A New or Improved Form of Coal Saving Firegrate.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
A New or Improved Form of Coal Saving Firegrate.
We, WILLIAM MARSHALL KEITH, Blacksmith, 28, Westbourne Gardens, and
DAVID KEITH, Ship Draughtsman, Welbeck Road, both of Walker, in the County
of Northumberland, do hereby declare the nature of this invention to be as
follows:-
This invention which we propose to call "Keith's Coal Saver" is applicable to
any existing firegrate and is specially intended for house fires the principle upon
which it is based being that a bed of fuel of moderate thickness kept in bright
condition by a free supply of air from underneath and free from being choked by
partially consumed fuel or ashes will effect complete combustion; and thereby
prevent the great waste of fuel in ordinary fires by constant stirring which
involves a loss of a considerable amount of partially consumed fuel removed
amongst the ashes.
This coal-saving grate consists of a sunk portion to form the fuel bed supported
upon the second bar of the ordinary grate and at the back pivoted to a plate
sloping downward and forward and supported by resting against one of the bottom
bars of the ordinary grate. The depth of the sunk portion will be only about 3rd
of the depth of the ordinary fire grate hence it gives a greater heat by the fuel
being near the top and kept in bright condition by the ample supply of air from
below and the ashes, which are reduced to a minimum, falling freely down against
the sloping plate and onto the hearth. The sloping plate also deflects heat into
the room as well as warming the air supplied to the fuel. One great advantage of
our invention is that it can be fitted in a few minutes to any existing fire grate
as it is quite portable and has no bolts, screws, or other fastenings, being simply
hooked on the second front bar and supported by the sloping plate on the bottom
grate so that it can be set at a suitable angle, also allowing for being adjustable
as to its angle.
D
1
w or improved Form of Coal Saving: Firegrate.
We, WILLIAM MARSHALL KEITH, Blacksmith, 28, Westbourne Gardens, and
DAVID KEITH, Ship Draughtsman, Welbeck Road, both of Walker, in the County
of Northumberland, do hereby declare the nature of this invention and in what
manner the same is to be performed to be particularly described and ascertained
on and by the following statement:-
This invention which we propose to call "Keith's Coal Saver" is annlinaKL. ¿

page_text: any existing firegrate, and is specially intended for house fires, the principle upon
which it is based being that a bed of fuel of moderate thickness kept in bright
condition by a free supply of air from underneath' and free from being choked by
partially consumed fuel or ashes will effect complete combustion, and thereby
prevent the great waste of fuel in ordinary fires by constant stirring, which
involves a loss of a considerable amount of partially consumed fuel removed
amongst the ashes.
The improved grate consists of a sunk portion to form the fuel bed, supported
upon one of the top bars of the ordinary grate, and at the back pivoted to a plate
sloping downward and forward and supported by resting against one of the bottom
bars of the ordinary grate. The depth of the sunk grate will be only about one-
third of the depth of the ordinary fire grate, hence it gives a greater heat by the
fuel being near the top and kept in bright condition by the ample supply of air
from below and the ashes, which are reduced to a minimum, falling freely down
against the sloping plate and on to the hearth. The sloping plate also deflects
heat into the room as well as warming the air supplied to the fuel. One great
advantage of our invention is that it can be fitted in a few minutes to any existing
fire, as it is quite portable and has no bolts, screws, or other fastenings, being
simply hooked on one of the top front bars and supported by the sloping plate on
the bottom grate, so that it can be set at a suitable angle.
DESCRIPTION OF DRAWINGS.
The accompanying drawing shews three views of "Keith's Coal-saver" applied
to an ordinary fire grate, Fig. 1 being a front view, Fig. 2 a section through t
on Fig. 1, and Fig. 3 a plan looking on top. On Fig. 2 the front and bottom bars
of the ordinary grate are shewn by dotted lines.
The sunk grate A, has cast upon it two hooked brackets B, for fixing it in posi-
tion on one of the front bars of the ordinary grate, and at the back the sloping
plate D, is pivoted to it by pins C, which fit into sockets C in which its angle
may be adjusted by the claws E, resting against the back top edge of one of the
bottom bars as shewn, and this adjustment of the sloping plate provides for the sunk
grate having more or less slope toward the back, as may be required to regulate the
thickness of the fuel carried upon it. C*C* dotted line on Fig. 3 is the centre
line of the hinge of plate D.
The coal-saving grate as shewn will fit to any of the ordinary sizes of fire grates.
but in special cases as of extra,width &c. we provide special patterns. The sunk
grate is cast of stove metal, and is light and neat in appearance, and as it, with
the hook brackets, hinge brackets, and the sloping back deflecting plate are put
together without bolts there is nothing to come loose. The coal saver is quite port-
able, requires no skill to fix it, and the first cost is trifling compared with the
economy.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
A sunk grate to carry a thin bed of fuel, readily attachable to and removable from
the front of the ordinary fire grate without screws or loose fixings, and having at back
a pivoted deflecting plate sloping forward to an adjustable extent, forming a sup-
port to the sunk grate, and deflecting heat into the room, with the objects herein-
before set forth, and constructed substantially as described and shewn.
Dated this 1st day of April 1899
T. J. DANSON, F.Inst.P.A.,
Agent for Applicants, Newcastle upon Tyne.