Year: 1888

page_text: We ROBERT BAILLIE MAIN and. ARCHIBALD POLLOCK MAIN both of the firm of
R. & A. Main, Gas Engineers, Argyle Works, Glasgow, do hereby declare the nature
of this Invention to be as follows:-
This Invention relates to gas fires or stoves of the kind wherein pieces of metallic
fretwork or like perforated or porous refractory material placed in front of a fire clay
slab are heated to incandescence by the flame issuing from a Bunsen or other burner
situated thereunder and are applied in grates or fireplaces for the purpose of heating
apartments mainly hy radiation and the improvements have for thoir object such
modification of construction as to ensure greater efficiency and a closer resemblance to
an ordinary coal fire than has hitherto been obtained by the combustion of gaseous
fuel.in such stoves:
The improved gas fire or stove comprises a slab of fireclay or other refractory
substance corresponding to the radiating back slab of like material in ordinary gas
fires the suid, slab being fitted in a. metal framing in the usual way or adapted to fit
directly into a coal grate or fire place. This slab is pierced or formed with a series of
holes or orifices which constitute sockets for hollow stems formed on claw like pieces
of fretwork composed of metal or other refractory material and fitted to project from
the face of the slab. The fretwork pieces are by preference made in two parts or
split longitudinally, the parts each resembling a claw and embracing between them an
irregularly shaped ball or lump of fireclay, asbestos or other heat absorbing and
refractory substance on which is formed a stem entering the hollow stem of the claw
pieces. The flame from a Bunsen or other burner or series of burners passes upwards
through the claw like frets which are thereby heated to incandescence and serve in
conjunction with the balls or lumps and the slab into which they are inserted, to
absorb and radiate outwards the heat generated by the combustion of the gas issuing

page_text: from the burners. Over the series of fretwork pieces is or may be fitted horizontally
or at an inclination a corrugated slab of fire brick or like material serving to direct
and retard the outflow of the products of combustion towards the chimney and over
the whole a hood or canopy may be fitted.
.
We, ROBERT BAILLIE MAIN and ARCHIBALD POLLOCK MAIN both of the firm of
R. & A. Main, Gas Engineers, Argyle Works, Glasgow, 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 gas fires or stoves of the kind wherein pieces of metallic
fretwork or like perforated or porous refractory material placed in front of a fire clay
slab are heated to incandescence by the flame issuing from a Bunsen or other burner
thereunder and are applied in grates or fire places for the purpose of beating
apartments mainly by radiation; and the improvements have for their object such
modification of construction as to ensure greater efficiency and a closer resemblance.
to an ordinary coal fire than has hitherto been obtained by the combustion of gaseous
fuel in such stoves.
As represented in part in front elevation at figure 1 in vertical section at figure 2
and in enlarged detail views at figures 3, 4, 5 and 6 of the accompanying drawings,
the improved gas fire or stove comprises a slab A of fire clay or other refractory.
substance corresponding to the radiating back slab of like material in ordinary gas
fires the said slab being fitted in a metal framing F in the usual way or adapted to fit
directly into a coal grate or fire place. This slab A is pierced or formed with a series
of holes or orifices A' which constitute sockets for hollow stems B¹ formed on claw
like pieces B of fretwork composed of metal or other refractory material and fitted to:
project from the face of the slab. The fretwork pieces B are by preference made in
two parts or split longitudinally the parts each resembling a claw, and embracing
between them an irregularly shaped ball or lump of fire clay, asbestos or other heat
absorbing and refractory substance on which is formed a stem C' entering the hollow
stem B' of the claw pieces. The flame from a Bunsen or other. burner or series of

page_text: burners D passes upwards through the claw like frets B which are thereby heated to
incandescence and serve in conjunction with the balls or lumps and the slab A into
which they are inserted, to absorb and radiate outwards the heat generated by the
combustion of the gas issuing from the burners.
The frets B may be secured in the slab A in the manner indicated by forming the
stems A with projections which are passed through recesses a¹ in the orifices A¹ the
frets being turned to bring the projections out of the line of said recesses after
the stems are passed through the slab A and the ball or lump C is retained in place
by means of a pin or projection b on the inside of one half of the fret.
Over the series of fret work pieces B is or may be fitted horizontally or at an
inclination a corrugated slab E of fire brick or like material serving to direct and
retard the outflow of the products of combustion towards the chimney G and over the
whole a hood or canopy H may be fitted.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. The combination of parts constituting the improved gas fire hereinbefore
described with reference to the annexed drawings.
2. In a gas fire the combination with a refractory slab of a series of open or
perforated frets fitted therein and adapted to retain balls or lumps of refractory
material and serving to absorb and radiate heat from gas flames impinging on them
substantially as described.
3. In a gas fire a heat absorbing and radiating fretwork formed of open claw like
frets adapted for attachment to a refractory slab and to enclose or retain refractory
balls or fumps substantially as described.
Rated th
M1000
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow,
Agents.