provements in and Appertaining to Domestic Fire-grates.
Year: 1887

page_text: Date of Application, 3rd Jan., 1887
Complete Left, 3rd Oct., 1887
Complete Accepted, 4th Nov., 1887.
PROVISIONAL SPECIFICATION
Improvements in and Appertaining to Domestic Fire-grates.
I WILLIAM HENRY HERBERT MARTEN, of 29, Manningham Lane, Bradford, in the
County of York, Architect, do hereby declare the nature of this invention to be as
follows:-
This invention relates to novel and useful improvements in domestic fire-grates
applicable to fire-grates of adjoining rooms in which the fire-grates are placed back
to back; and the object of the said invention is to provide a double grate capable
of being rotated, thus enabling each of the grates to be utilised for either of the
rooms, and assuming there is only a fire in one of the grates permitting such grate
to be turned from one room to the other when desirable. The invention also consists
of an improved arrangement of flues or passages in connection with such grates to
facilitate ventilation.
For this purpose I employ a bed plate, or slab, preferably of cast iron and of
circular form, upon which a double rotary fire-box is pivotted, the other parts of
the grates are constructed as far as possible to comply with the appearance of an
ordinary grate. Anti-friction rollers may be introduced to lessen the friction caused
by the rotation of the fire-boxes and in the case of heavy grates suitable mechanism is
connected therewith by which to turn such fire boxes. The said fire-boxes may be
constructed of metal fireclay or other suitable material, but fireclay in connection with
metal is preferably employed.
The various points of junction between the fire-boxes and the rest of the grates are
arranged as far as practicable to overlap and the grates are so constructed as to
prevent sound passing from one room to the other.
Small brushes are preferably fitted to keep ashes from passing to the side of the
grates when the fire-boxes are rotated, and also to sweep loose ashes off the fire-boxes
during their rotation. A suitable device is attached for locking the fire-boxes in
position.
range
The said rotary fire-boxes may be employed in combination with a kitchen at
one side and an ordinary range at the other.

page_text: To facilitate ventilation two ventilating pasaages or flues are constructed, between
the two fire-boxes, in communication at the bottom with the interior of the rooms and
passing up between the grates. One of the said passages is in communication with an
inlet grating and is designed to supply fresh air, to the rooms, warmed during its
passage between the grates and fire-boxes. The other passages is connected with
gratings communicating with the top of the room and is designed to carry off
foul air.
COMPLETE SPECIFICATION.
Improvements in and Appertaining to Domestic Fire-grates.
I, WILLIAM HENRY HERBERT MARTEN, of 29, Manningham Lane, Bradford, in the
County of York, Architect, 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 novel and useful improvements in domestic fire-grates
applicable to the fire places of adjoining rooms when such fire places are placed back
to back. And the object of the said invention is to provide a double grate, or
fire box with two divisions, capable of being rotated so as to enable each of the
grates or divisions to be utilised for either of the rooms, thus assuming there is only
a fire in the grate or division of one room permitting such fire to be turned into the
other room when desired. The invention also consists of an improved arrangement of
flues or passages in combination with such grates to facilitate ventilation.
In order to fully describe my invention reference is to be had to the accompanying
drawing forming a part of this specification, in which similar letters of reference
indicate corresponding parts in all the figures.
Figure 1, represents an elevation of my improved fire-grates. Figure 2, is a
sectional plan of the same through the broken line a, b in the former figure. And
Figure 3, is a vertical section through the centre of the grates.
Figures 4, 5 and 6 illustrate the application of my improvements when one room is
fitted with a kitchen range and the other with an ordinary grate. Figure 4 is an
elevation of the kitchen range. Figure 5, is a sectional plan of both grates through
the broken line a, b figure 4. And figure 6 is a vertical section through the centre of
the grates.

page_text: in Figures 7 and 8 a ventilating system is illustrated in combination with grates
fitted with a double rotary fire box. Figure 7, is an elevation. And figure 8 a vertical
section through the centre of the grates.
In each of the sectional figures the double fire boxes and the parts thai rotate there-
with when shown in full are represented black.
Referring particularly to figures 1, 2 and 3. The rotary portion A in which the
fire boxes Bare formed is pivoted between the circular bed plate and the cross
stay D, connecting the iron "shamns" together, by the pin F. The fire boxes B
are formed between the two pairs of radial partitions G, to which the front and
bottoni bars I and J are secured. Beneath the bottom bars J of each fire box an ash
pan or drawer K is fitted to receive the ashes falling from such fire boxes. The said
ash pans are adapted to be carried round with the fire boxes. They are supported by
the table L formed with such fire boxes and approximately fill the spaces between the
underside of the bars J and said table.
The brushes M represented in figure 1 secured to the sides of the shams E are
provided to brush loose ashes off the fire boxes and ash pans during the act of rotating
them to turn the fire from one room to the other. And the bolt N secured to the side
of one of the shams E is capable of being shot into holes formed in two of the radial
partitions G to hold the rotatory parts stationary.
As the top of the rotary portion A passes above the hoods O on the shams E any
slight defect in the fitting at the top is concealed, thus one room cannot be seen from
the other and sounds are preventing from passing. The rim on the table L is also
provided to prevent light and sounds passing below.
It is obvious that the said fire boxes may be varied in form or that they may be
placed closer together, but in the arrangement shown besides being similar in shape
to an ordinary fire grate it allows of a sufficiently thick division being made above to
provide separate flues for each room, as according to the building regulations at
present generally in vogue in the British Isles smoke from the fires of separate rooms
must not be passed into the same flue.
In ordinary cases the fire boxes may be conveniently 'turned by hand or pushed
round with a poker or other ready means, but in the case of heavy grates a circular
rack may be secured to the top of the rotary part adapted to engage with a spur
wheel mounted above which is capable of being operated from either room for the
purpose of turning the fire boxes.
In the kitchen range shown in combination with an ordinary range in figures 4, 5
and 6 the fire hoxes are raised higher and an additional top bar is fixed to the kitchen
range. The boiler P is cylindrical and is provided with a central flue Qwith which
the flues R and S respectively passing under the oven T. and hot hearth U communicate.
The heated products of combustion take the course indicated by the arrows in
figure 5 when the dampers V are raised by the handles W to which they are
connected. The door or opening X is provided to give access to the flue for
cleaning purposes. In this case the fire boxes encircle the boiler P and are thereby
retained in position during rotation and the antifriction rollers Y mounted in Û carry
the weight and relieve the friction.
Slow combustion fire boxes are shown in combination with the ventilating arrange-
ment illustrated in figures 7 and 8. Two flues or passages e and d are arranged
between the fire boxes which are formed of two L shaped pieces of fire brick /
connected together at each end and divided centrally by the partition i. The pieces h
are mounted on the table L pivoted by the pin F between the bed plate C and the
fixture D. The ash pans are stationary and are curved to fit the front of the fire
boxes.
The passagen beneath the grates is in communication with the atmosphere and
supplies fresh air to the flue d which is heated between the fire boxes and passes by
adjustable gratings at the end of such flue into the rooms. Similar gratings near the
ceiling communicate with the flue e and the upward current in such flue created by
the beat below draws the foul air from the top of the rooms into such flue which passes
it into the open air above..

page_text: 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 construction and arrangement of a rotary fire-grate adapted to be pivoted
between adjoining rooms and provided with two fire boxes or divisions capable of
being turned from one room to the other, substantially as herein shown and described
and for the purpose specified.
2. The combination with a double fire-grate adapted to be used for adjoining rooms,
of a rotary fire box provided with two divisions capable of being turned from one
room to the other, substantially as herein shown and described and for the purpose
specified.
3. The combination with a kitchen range and an ordinary grate adapted to be
used for adjoining rooms, of a rotary fire box provided with two divisions capable of
being turned from the range to the grate and from the grate to the range, substantially
as herein shown and described and for the purpose specified.
4. The combination with a double fire-grate and a rotary fire box adapted to be
used for adjoining rooms, of the ventilating arrangement, substantially as herein shown
and described.
5. The combination with the said rotary fire-grate, of a stationary brush or brushes
arranged to sweep loose ashes of such grate during rotation, and a bolt adapted to fix
said grate in position, substantially as herein shown and described.
Dated this 20th day of Santambon 1827
DRACUP & NOWELL,
Bradford, Agents.