AN IMPROVE- and in what manner MENT IN AND APPERTAINING TO FIRE GRATES OR STOVES.
Year: 1884

page_text: The decision of the Chief Examiner, acting on behalf of the Comptroller, of the
22nd day of September 1893, allowed, under Section 18 of the Patents, &c
Act. 1883. an Amendment of this Specification.
COMPLETE SPECIFICA
I ROBERT CROSTHWAITE trading in Copartnership with John Robinson
Crosthwaite, as R. W. Crosthwaite of Upper Thames Street in the County of
Middlesex and Union Foundry, South Stockton-on-Tees in the County of York
Iron Founders do hereby declare the nature of my invention for "AN IMPROVE-
and in what manner
MENT IN AND APPERTAINING TO FIRE GRATES OR STOVES.
وو
the same is to be performed to be particularly described and ascertained in and
by the following statement :-
This invention has for its object improvements in and appertaining to stoves
and grates combining what are known as the slow combustion stoves as well as
the quick combustion, and consists in forming the breast or front bars with an
angular grating on the underside meeting or abutting against the front of the solid
fire brick base.
This solid fire brick base also advantageously forms the back, sides and top and
the grate in the front at the upper part thereof is provided with a controllable
canopy acting as a flap or damper and hinged or otherwise as to be capable of
adjustment.
In addition to the fire brick-back a further shield may be placed at the buck
and any convenient distance-from-the buck-of-the-fire-brick. The currents of air
may be admitted to the underside of this which-by-circulating against the cuid
back is admitted into the rooms in a heated state through suitable apertures or
openings in the front of the grate.
In the accompanying Drawings Figure 1 is a front elevation of a grate with the
improvements attached. Figure 2 is a sectional plan through XX. Figure 3 is a
vertical cross section Y Y Figure 1. Figure 4 shows a vertical cross section
through YY with the shield-attached, Figure-5-ie-a-sectional plan.
A is the movable canopy B are the front bars and C are the angular bars
meeting or resting upon the fire brick base D; E is the back thereof and F F the

page_text: sides formed at an angle so as to diffuse the heat. G is the top of a shape as to
somewhat arrest the products of combustion and tend to deflect the heat. It is
from this part G that the distance of the canopy A is determined.
In Figures 4 and 5 the shield H-is-shown at a short-distance from the back of
the fire brick acting as a heating chamber or as a passage for the currents of air to
be heated which can either be admitted through the apertures I at the base or from
the back or underside-as-may-be-desired and the air thereby heated passes into the
room through the apertures J J at the sides or top of the main frame-casting
The shield or back-plate H is in some cases-provided with ribs K-as shown in
Figure-ǎ
Having thus described and ascertained the nature of the said invention and
in what manner the same is advantageously carried into effect I would have it
understood that what I desire to claim by Letters Patent is :-
First The employment of an adjustable canopy A to act as a flap or damper
whereby the distance of said canopy A from the fire brick back G can be determined
as desired substantially in the manner herein described and illustrated.
Second-The front or breast bars B provided with supplementary angular
grating C in combination with the fire brick D E F G forming the base sides back
and top substantially as herein described and illustrated.
Third In a stove or grate the application of the metal or other shield H with
or without ribs K in combination with the fire brick-back and substantially as
described and illustrated--with reference to Figures 4 and 5 of the accompanying
drawings.
PHILLIPS & LEIGH,
22, Southampton Buildings, W.C.,
Agents for the Applicant.

page_text: I ROBERT CROSTHWAITE trading in Copartnership with John Robinson
Crosthwaite, as R. W. Crosthwaite of Upper Thames Street in the County of
Middlesex and Union Foundry, South Stockton-on-Tees in the County of York
Iron Founders do hereby declare the nature of my invention for "AN IMPROVE-
MENT IN AND APPERTAINING TO FIRE GRATES OR STOVES and in what manner
the same is to be performed to be particularly described and ascertained in and
by the following statement:-
"
This invention has for its object improvements in and appertaining to stoves
and grates combining what are known as the slow combustion stoves as well as
the quick combustion, and consists in forming the breast or front bars with an
angular grating on the underside meeting or abutting against the front of the solid
fire brick base.
This solid fire brick base also advantageously forms the back, sides and top and
the grate in the front at the upper part thereof is provided with a controllable
canopy acting as a flap or damper and hinged or otherwise as to be capable of
adjustment.
In addition to the fire brick back a further shield may be placed at the back
and any convenient distance from the back of the fire brick. The currents of air
may be admitted to the underside of this which by circulating against the said
back is admitted into the rooms in a heated state through suitable apertures or
openings in the front of the grate.
In the accompanying Drawings Figure 1 is a front elevation of a grate with the
improvements attached. Figure 2 is a sectional plan through XX. Figure 3 is a
vertical cross section Y Y Figure 1. Figure 4 shows a vertical cross section
through Y Y with the shield attached, Figure 5 is a sectional plan.
A is the movable canopy B are the front bars and C are the angular_bars
meeting or resting upon the fire brick base D; E is the back thereof and F F the
sides formed at an angle so as to diffuse the heat. G is the top of a shape as to
somewhat arrest the products of combustion and tend to deflect the heat, It is
from this part G that the distance of the canopy A is determined.
In Figures 4 and 5 the shield H is shown at a short distance from the back of
the fire brick acting as a heating chamber or as a passage for the currents of air to
be heated which can either be admitted through the apertures I at the base or from
the back or underside as may be desired and the air thereby heated passes into the

page_text: room through the apertures J J at the sides or top of the main frame casting.
The shield or back plate H is in some cases provided with ribs K as shown in
Figure 5.
Having thus described and ascertained the nature of the said invention and
in what manner the same is advantageously carried into effect I would have it
understood that what I desire to claim by Letters Patent is :-
First-The employment of an adjustable canopy A to act as a flap or damper
whereby the distance of said canopy A from the fire brick back G can be determined
as desired substantially in the manner herein described and illustrated.
Second-The front or breast bars B provided with supplementary angular
grating C in combination with the fire brick D E F G forming the base sides back
and top substantially as herein described and illustrated.
Third. In a stove or grate the application of the metal or other shield H with
or without ribs K in combination with the fire brick back and substantially as
described and illustrated with reference to Figures 4 and 5 of the accompanying
drawings.