Improvements in the Construction of Apparatus for Cooking, Roasting Coffee, and the like by Gas, Petroleum, and other similar Products.
Year: 1889

page_text: Date of Application, 11th May, 1889
Complete Specification Left, 11th Feb., 1890-Accepted, 10th May,
1890
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Apparatus for Cooking,
Roasting Coffee, and the like by Gas, Petroleum, and other
similar Products.
I THOMAS GREENWOOD of 5 Wentworth Terrace, Pellon Lane, Halifax, in the
county of York, Engineer, do hereby declare the nature of this Invention to be as
follows:-
My invention relates to further improvements in gas stoves in connection with my
previous patents especially patent No. 12,236 year 1887 which includes a gas stove
with disc for grilling chops, steaks, and the like.
The
I have now completed the apparatus as follows for the disc grill stoves.
burner for the single disc grill stove, is the shape of a two pronged fork, so as to
have a long row of jets, to give the required heat equally to each side of the disc,
and above each row of jets, I have a portable lateral reflector heater so as to retain
and throw the heat onto each side of the disc; they are also made to collect the heat
nearer to the centre, which effects a saving in gas for both grilling and boiling.
I
The heaters also form bearers for a boiler or kettle to rest on, when the disc is not
in use; one of the bearers has a bearing cast in it, for the disc spindle to revolve in;
there are four notches or slots cast on the burners for the above heaters to fit in.
have also a portable double heat collector and kettle bearer, which I use for the small
size disc grill stoves; with the burner for this stove, the legs or stand are bearings
for a kettle, also the bearings for the disc spindle, and ears for a joint to form the
hinge for the box cover; all the above parts are cast with the burner.
And for this burner there is a half cylindrical box shaped cover with or without reflector
plates, when without the plates the cover is made to come down nearly close to the burner;
the cover is attached to the lower part or burner by a hinged joint; located near one end
of the burner, so that by lifting the box cover it swings clear of the kettle or boiler when
The above box
placed low down near the flame, when the disc grill is not in use.
cover is for retaining and reflecting the heat for both grilling meat and when coffee
roasting. The same box cover has an outlet at the top for the waste heat to pass
through, and over this is fixed a round cast iron plate for a boiler or kettle to rest
on, to utilize the waste heat when grilling or coffee roasting.
The burner with stand and with box cover, and all the apparatus as specified above,
are applicable for coffee roasting.
In place of the disc grill I simply have a cylindrical disc made of sheet iron, or
other suitable material, both sides of the cylindrical disc are convex or dished out at
the centre, one of them is fixed on the end of the spindle, with a handle at the other
end; the other dished or convex side to have a hole in the centre, suitable for getting.
the berries in and out of the cylinder these round convex sides are put together by
a number of elevators, or what may be called internal buckets made of sheet iron, a
part of which is attached to the convex sides, and the cylinder is completed by a plain
round part, like a pulley rim for forming the periphery of the cylinder which rim is
fixed in its place by the above buckets which answer as stays for fixing the cylinder
together. The cylindrical disc is turned by hand, spring motor, or other motive
power.
I have also an improved construction of oven for fixing either over or under the
disc grill stove, suitable for one or two grills together these ovens are constructed
without the usual door frame, the oven for the double grill has two holes in the bottom
plate, which are the same centres as the two outlet holes in the grill covers, and with
two cars cast on for bolts, which both answer for the door hinges to swing on, and for
fixing the oven together.

page_text: The oven top plate has also two ears cast on, which are the same centres as the ears
on the oven bottom plate, with a bolt at each corner at the back, inside, the oven for
bolting the top and bottom to the back and the side plates of the oven, these four bolts
are all that are required for bolting the oven together, and two of them also answer
for the door hinges.
When the above oven is constructed to have the grill stoves on the top, it is in
every way the same, only there are two burners attached to the oven bottom, the
same oven bottom casting also forms the top part of the burners, having a round hole
in the centre of each half of the oven, about five inches in diameter with a flange on
the top side notched for a kettle or boiler to stand on, and with a round flange on the
underside with small notches cast on, suitable for the size of burner jets, so that the
flame will pass up inside the hole against the kettle bottom, and through the notches
to the outside of the kettle; the same burner is also suitable for baking or cooking
in the oven. The bottom part of the burner is bolted to the underside of oven
bottom, the outer flange of burner is bedded in cement, the other flange bears against
the flange with small notches in, and with stem on for mixing chamber for air
and gas.
The oven for the double grill also forms a double oven having two doors and a
division plate, so that one half can be baking, while the other is used as a
boiling burner. I have also two ears cast on each side of the oven top plate,
suitable for a brass rod to pass through with a knob at each end, which rod or pipe
useful as a handle for lifting the oven, or for throwing anything over that requires
drying.
I also construct a single oven with one round burner at the bottom, and use the
same bolt that bolts the oven top and bottom together, also to answer for the oven
door to swing on as a hinge. I also use the same construction as above, but with dise
grill at the bottom, with the grill burner for a stove for coffee roasting, baking in the
oven, grilling chops or steaks, boiling water, and other purposes, and also suitable for
warming a room, which are partly included in patent No. 12,236 year 1887 excepting
the above improvements made since.
Also further improvements in connection with the large oven in my patent
No. 12,236 year 1887, Figs. 1 and 2, I have now a long tube burner made to swing
on a joint, so that the jets can be lighted before swinging the burner into the
chamber for the deflector heater, and in place of a double chamber, I now have a
single one, so that the heat passes across the oven up oue side to the top, also with a
few jets for the heat to pass up the same side that the burner is on.
With two cage
grids in place of one, and so that I can take each grid out separately without the
large grid wheel the motion is communicated to each of the two grid wheels by a com-
bined spur, and bevel carrier wheel, which receives its motion from the larger
horizontal combined spur and bevel wheel; I also cast the wheel with the part that
forms the end of the cage grid, and the centre in one casting.
The bearings for the cage grids to revolve in, is made in one pieco of flat iron,
with each end bent at right angles, with a hole in which slides on the shelve rests,,
and also forms a bar in front, as handle for drawing the grid out of the oven.
The above carrier wheel is made to slide endways in and out of gear, so as to be
clear for taking the cage grids out of the oven, and construct half the cage grid or
door, so that it fastens automatically by a spring latch arrangement, and make use. of
the wire or bars of the cage both for spring and hinge.
I also use the shaft end on the top of the stove for a fulcrum for the signal lever
that turns the gas off, with the lever low down, near the centre of index plate, with
internal notch for lever to drop into.
Dated this Tenth day of No. 1900
JOHN E. WALSH,
Crossley Street, Halifax, Agent for the Applicant.

page_text: IBS TOALUNG CUT
DESCRIPTION OF DRAWINGS.
Fig. 1. shows view of single disc grill stove whon used for grilling, and boiling
water at one and the same time.
Fig. 2. shows view of single disc grill stove with semi-cylindrical box cover thrown
back exposing grill.
Fig. 3. shows view of single disc grill stove with cover thrown back and used for
boiling only.
Figs. 4 and 5 show views of double disc grill stoves.
Fig. 6. shows view of stove with double heat collector, the outer cover in position
for grilling,
Fig. 7. shows view of stove with double heat collector, the outer cover being thrown
back, ready for boiling and grilling.
Figs. 8 and 9. are sectional views of coffee roaster.
Fig. 10. is a view of double oven for baking, cooking or boiling and grilling
purposes.
Figs. 11 and 12. show views of oven for grilling, boiling, baking coffee roasting and
for heating a room.
Figs. 13 and 14 show side and front elevation of burner for deflector heater and
motion for operating same.
Fig. 15. shows plan of burner detached.
Figs. 16. and 17. show plan and elevation of burner and deflecting plates for disc
grill stove, shown at Figs. 1. 2 and 3.
Figs. 18. and 19. show plan and elevation of burner for double oven shown at
Fig. 10.
Figs. 20, and 21 show front and side view of cage grid and mechanism for operation
the same.
Figs. 22 and 23 show end views of cage grid detached, open and closed, which are
improvements on my former patent No. 12236 year 1887.
The burner B. for the single and double disc grill stove A. see Figs. 1. 2. 3. 4
and 5. sheet 1 is the shape of a two pronged fork so as to have a long row of jets C,
to give the required heat equally to each side of the disc grill C and above each row
of jets I have a portable lateral reflector heater D. so as to retain and throw the heat
on to each side of the disc C; they are also made to collect the heat nearer to centre
which effects a saving in gas for both grilling and boiling. Hinged to the top of the
stove A. is a semi-cylindrical box shaped cover G, which acts as a heat deflector for
both grilling and coffee roasting, at the top of which is a small outlet G₁ for the waste
heat to pass through, and over this is fixed a suitable plate G³, or cover for a pan or
kettle or other vessel to stand upon.
The heaters D, also form bearers for a boiler or kettle E, to rest on, when the disc is
not in use see Fig. 3; one of the bearers has a bearing cast upon it for the disc

page_text: •
spindle F to revolve in. There are four notches or slots H cast on the burners B for
the above heaters to fit in..
:
In Figs. 6 and 7, see sheet 2, I have also a portable double heat collector and
kettle bearer A which I use for the small size disc grill stoves with the burner B.; for
this stove the legs or stand C, are bearings for a kettle D also the bearings for the disc
spindle E and ears for a joint to form the hinge F for the box cover G. All the
above parts are cast with the burner and for this burner there is a half cylindrical
box shaped cover G. with or without deflector plates, when without the plates, the
cover is made to come down nearly close to the burner B see Fig. 6, this cover is
attached to the lower part or burner by a hinged joint F, located near one end of the
burner so that by lifting the box cover it swings clear of the kettle or boiler D, and
placed low down near the flame, when the disc grill is not in use. The above box
cover is for retaining and reflecting the heat for both grilling meat, and coffee roasting,
the same box cover has an outlet E at the top for the waste heat to pass through, and
over this is fixed a round cast iron plate J for a boiler or kettle to rest upon to utilize
the waste heat when grilling or coffee roasting.
The burner with stand and with box cover and all the apparatus as specified above
are applicable for coffee roasting.
In place of the disc grill see Figs. 8 and 91 simply have a cylindrical disc J¹ made
of sheet iron or other suitable material.
Both sides of the cylindrical disc are concave or dished out at the centre, one of
them is fixed on the end of the spindle J² with a handle J³ at the other end. The
other dished or concave side has a hole J in the centre suitable for getting the berries
in and out of the cylinder, these round concave sides are put together by a number of
elevators or what may be called internal brackets K2 made of sheet iron, a part of
which is attached to the concave sides, and the cylinder is completed by
a plain round
part like a pulley rim for forming the periphery of the cylinder which rim is fixed in
its place by the above buckets which answer as stays for fixing the cylinder together.
The cylindrical disc Jis turned by hand, spring motor or other motive power. I
have also an improved construction of oven see Figs. 10. 11. and 12. sheet 2, for
fixing either over or under the disc grill stove suitable for one or two grills together.
These ovens are constructed without the ordinary door frame.
The oven for the double grill has two holes in the bottom plate which are the same
centres as the two outlet holes in the grill covers.
The oven bottom plate see Fig. 10 has two ears P. cast on for bolts R. which both
answer for the door hinges S to swing on, and for fixing the body of the stove
together. The oven may be placed on the top of the double grill stove (shown at
Figs. 4 and 5) if required.
The oven top plate T has also two ears P¹ cast on, which have the same centres as
the ears on the oven bottom plate through which pass the said bolts R, at each corner
at the back inside of the oven, for bolting the top, bottom, back and the side plates of
the oven together. These four bolts are all that are "required for bolting the oven
together, and two of them also answer for the door hinges. When the above oven is
constructed to have the grill stoves on the top it is in every way the same, only there
are two burners attached to the oven bottom.
I construct these burners in halves and attached to the oven bottom (see Fig. 18
sheet 3); the round hole K in the centre of each half of the said oven bottom has a
flange U on the top side notched for a kettle or boiler to stand on U₁ and with a
bottom ring Z on the underside bearing against the small notches U₁ on the underside
of the top flange, which are cast on and made suitable for the size of burner jets, so
that the flame will pass up inside the hole against the kettle bottom and through the
notches to the outside of the kettle. The same burner is also suitable for baking or
cooking in the oven.
The bottom ring Z of the burner is bolted to the top flange U and forms a cement
joint upon the bottom ring. A stem U2 acts as a mixing chamber for air and gas.
This oven forms a double oven having two doors V and an adjustable division plate VI
i

page_text: so that one half can he baking while the other is used for boiling. purposes.. The
division plate may be removed if required and the entire oven used for boiling or.
baking as required.
I have also two oars W, cast on each side of the oven top plate T suitable for a
brass rod X to pass through with a knob at each end which rod or pipe is useful
as a handle for lifting the oven or for throwing anything over that requires
drying.
Upon each side of the oven frame are notches V3 supporting a pivotted adjustable
bracket V upon which may be placed any suitable receptacle or vessel V for grilling
purposes.
on
I also construct a single oven (see Figs. 11 and 12. sheet 2) with one round
burner at the bottom and use the same bolts as described in Fig. 10. that
bolt the oven top and bottom together, also to answer for the oven door to swing
as a hinge. I also use the same construction as above but with disc grill Y
at the bottom with the grill burner for a stove for coffee roasting, baking in the
oven, grilling chops or steaks, boiling water, and other purposes and it is also suitable
for warming a room, which are partly included in patent No. 12,236 year 1887,
excepting the above improvements made since.
Also further improvements in connection with the large oven of patent No. 12,236,
Figs. 1 and 2. In Figs. 13, 14 and 15, sheet 3, I employ a long tube burner A made
to swing on a joint B, so that the jets C can be lighted before swinging the burner
into the chamber for the deflector heater.
Figs. 20 and 21, sheet 4 in place of a double chamber I now have a single one A so
that the heat passes across the oven up one side to the top to the flue outlet B with
two cage grids CC in place of one, so that I can take each grid out separately
without removing the large grid-wheel D which operates the cage grids. The
motion is communicated to each of the two grid-wheels by a combined spur and
bevel carrier-wheel E, which receives its motion from the large horizontal combined
spur and bevel grid wheel D. I also cast the wheel F upon the cage grid with the
part that forms the end of the cage grid and the centre in one casting.
The bearings G for the cage grids to revolve in are made in one-piece of flat
iron with each end bent at right angles, the flat iron slides upon the shelve
rests H and also forms a bar G₁ in front as handle for drawing the grid out of
the oven.
The above carrier-wheel E is made to slide endways in and out of gear so as
to be clear for taking the cage grids Cout of the oven; and I construct half
the cage grid or door (see Figs. 22 and 23.) so that it fastens automatically by a
spring latch arrangement J, and make use of the wire or bars K of the cage
both for spring and hinge. I also use the shaft end L on the top of the stove
for a fulcrum for the signal lever M that turns the gas off. Near the centre of
the index plate N, is an internal notch P for the lever to drop into.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The general arrangement and construction of stove and burner for grilling,
boiling and coffee roasting such as shown and described.
2. The general arrangement and construction of coffee roaster such as shown and
described.
3. The general arrangement of portable double heat collector, kettle bearer and
burner such as shown and described.
4. The general arrangement and construction of double oven for baking, cooking,
boiling and grilling such as shown and described.
5. The employment of bolts such as R which secure the body of the oven together
as well answering for the door hinges and dispensing with door frames or oven fronts
as shown and described,

page_text: 6. The general arrangement and construction of oven for grilling, baking, boiling
and coffee roasting purposes such as shown and described.
7. The general arrangement and construction of burner with deflector heater and
means for operating same such as shown and described.,
8. Swinging the burner A on the joint B, in and out of the chainber for
the deflector heater as and for the purposes such as shown and described.
9. The general arrangement and-construction of burner for double oven, as and for
the purposes such as shown and described.
10. The general arrangement and construction of cage grid and means for operating
same as and for the purposes as shown and described.
Dated this Tenth day of February 1890.
:.
JOHN E. WALSH,
Crossley Street, Halifax, Agent for the Applicant.