Improvements in Slow Combustion Stoves.
Year: 1889

page_text: Date of Application, 2nd May, 1889
Complete Specification Left, 4th Nov., 1889-Accepted, 7th Dec., 1889
PROVISIONAL SPECIFICATION.
Improvements in Slow Combustion Stoves.
I WILLIAM VYSE of 21 St. Philips Road, Norwich in the County of Norfolk,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention has for its object improvements in slow Combustion Stoves known as
the "Norwich Stoves."
The firebasket is constructed of a flat firebrick grate, encased in a light tray of
iron or other suitable material-which grate has four or more suitably shaped
perforations.
Further of two vertical firebrick sides and a firebrick back of semi-circular shaps,
protruding into the fireplace.
This back is formed of two parts the one the base, reaching to the same height
as the topbar and the second resting on this base and being at its lower part of smaller
circumference than the base, curves forward and spreads out on top, thus overhanging
the fire and thereby throwing back the heat into the room and effecting a
perfect combustion of fuel. Over the point of greatest projection there is an inclined
return.
more
This second part of the back is fluted. The firebasket is narrower at the back than
in front.
Underneath the lower bar is situated a hit and miss ventilator, which will be opened
when a quick draught is desired-in that case, the air passes through it, over the ashes-
pan and through the grate. For slow combustion the hit and miss ventilator
remains shut.
The stove is otherwise constructed as usual with a register door," Blower" etc.
Dated this First day of May 1889.
WATAN
CHARLES W. J. NOLTE,
17. Coleman Street, E.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Slow Combustion Stoves.
1 WILLIAM VYSE of 21 St. Philips Road, Norwich, in the County of Norfolk,
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 has for its object improvements in open firegrates and slow com-
bustion stoves, particularly those known as-" Norwich stoves "by means of which
improvements a saving of fuel, better radiation of heat-towards the space to be
heated and an almost entire consumption of smoke is obtained.
In the accompanying drawings:
Fig. 1.-shews afront elevation Fig. 2-a section in plan through A-A and Fig. 3-
a vertical section illustrating my invention.
fis the ashespan,--a "hit and miss" ventilator,-"-the lower bar,-t¹-the
upper bar,-g-the firebrick gate,-M-the metal tray or casing for same,-6-the
base of the semicircular firebrick back-c-the toppart,-p-the projecting part of
same and-s.-the sides of the stove or open firegrate.
Like figures refer to like parts in all the drawings.
In carrying out my invention, I fit an open firegrate or slow combustion stove with
a firebasket made of a flat firebrick grate-g-encased in a light tray of iron or other
saitable metal, which firebrick grate (and the metal tray-M-underneath) has four

page_text: or more suitably shaped perforations (preferably of the shape and form shewn in
fig. 2).
The firegrate-g-is narrower at the back than in front.
The vertical sides-s-of the stove or firegrate, I also construct of firebrick, as well
as the back. The lattor is of semicircular shape, protruding into the fireplace. This
back is formed of two parts, the one the base-b-resting on the grate, reaches to
about the same height as the topbar-t', the second-e-resting on this base, is at its
lower part of smaller circumference, than the base, curves forward and spreads
out, forming a canopy, thus overhanging the fire and thereby radiating the heat into
the room (or other place to be heated) and effecting a more perfect combustion of fuel
and consumption of smoke.
From the point of greatest projection-p-the firebrick back inclines backwards.
and upwards till it reaches the register door, where it terminates.
Along this inclined return, which forms the lower part of the flue passages, the
smoke which is not consumed, passes, through the opened register door and up
the chimney. The second part-c.-of the back is fluted."
Underneath the lower bar t¹¹ is situated a hit and miss ventilator-h,-which when
a quick draught is required will be opened, when the air will be drawn through--
over the ashespan--and through the perforations of grate-g.-For slow com-
bustion the "hit and miss" ventilator remains shut.
The stove or open firegrate is otherwise constructed as usual.
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 open firegrates and slow combustion stoves, particularly those known as
"Norwich stoves," a specially constructed firebrick back of semi-circular shape,
protruding into the fireplace, spreading out at part-p-(thus overhanging the fire)
and consisting of two separate parts b &c, of which the latter is fluted, substantially
as described hereinbefore with reference to the annexed illustrative drawings.
"
2.) In open firegrates and slow combustion stoves particularly those known as
"Norwich stoves a grate constructed of a flat firebrick encased in a metal
tray M and having four or more suitably shaped perforations, subtantially as
described herein before with reference to the annexed illustrative drawings.
3.) In open firegrates and slow combustion stoves, particularly those known as
"Norwich stoves "the combination and arrangement of parts, substantially as
herein before described with reference to the annexed illustrative drawings.
Dated this Fourth day of November 1889.
CHARLES W. J. NOLTE,
--17, Coleman-Street, E.C., Agent for the Applicant.