Year: 1886

page_text: Date of Application, 1st Oct., 1886.
Complete Left, 1st July, 1887.
Complete Accepted, 30th Aug., 1887.
I THOMAS GREENWOOD of 5 Wentworth Terrace, Pellon Lane Halifax in the county
of York Machine Maker do hereby declare the nature of this Invention to be as
follows:-
My range is constructed with a portable plate just over the hole or outlet for the
waste heat from the oven, the space above the plate forms a grilling chamber, and by
withdrawing the plate, this grilling chamber then becomes a part of the oven. The
oven top casting over the grilling chamber also forms part of the boiling and grilling
burners; the stems or mixing chamber of the burners being cast on the underside
with core holes, to come through to the boiling burners, on the top of this casting, are
the sides for forming the chamber for the boiling burners, which chamber is completed
by the hot plate at the top, with portable lids, or covers, over each burner, so that
when one or all the burners are in use, none of the waste heat and gas escape into the
room, but enters a receiver at the back part of the hot plate, this receiver has a
nozzle at the top to fix the pipe to flue outlet, and a small hot plate over the nozzle
to utilize the waste heat, I use the waste heat, from the first oven in a second oven, to
be used for baking loaves and the like, which do not require as much heat as for cake
baking. The outlet for the waste gases and heat from the oven is regulated by an
automatic valve, receiving its motion from the same tap or valve that turns the gas
into the oven; when the gas is half on the flue outlet is half closed, and outlet is closed
when the gas
turned off the oven burners. I use an automatic valve to allow the
gas and waste heat from the grilling burners to pass through the oven top into the
boiling chamber, this valve receives its motion from the grilling burner tap. I form
a double mixing chamber for gas and air for the oven burners at the back or front of
the bottom cross rail of the door frame casting supplied by one gas jet only, and after
the gas and air is received into the mixing chamber, it is divided to supply the
burners at each side of the oven; these burners may be of either cast or wrought.

page_text: iron, with one end screwed into the mixing chamber, and the other ends pass through
the back of the oven, I use an improved latch for fastening the oven door, which with
the knob is fitted to a projection of the door, and made to slide in a vertical direction
by coming in contact with the incline on the stationary notch, on the door frame, and
fastens the door, by the knob and latch falling into the notch, I use an arrangement
for fixing the gas pipe, which is by bolting the pipe against a V on the casting, and
with the pipe and boiling and grilling taps, in one casting, and for forming the double
case, I cast snugs on the back of the door frame and on the back casting of the oven,
the thickness of the nonconducting chamber, forming the double case by galvanized
iron, or sheet steel, for one of the plates, and cast iron for the other plate, fixed by a
bolt or screw through the snugs.
Dated this Twenty ninth dav
Fig. 2 is a front elevation of Fig. 1.
Fig. 3 is a plan of Fig. 1 showing burners, the hot plate being detached.
Fig. 4 is a plan of Fig. 1 showing apparatus connected there with for utilizing waste
heat, and boiling water, and the like purposes.
Fig. 5 is an elevation of apparatus for utilizing waste heat.
Fig. 6 is an elevation of the boiler and second oven, which is placed upon the range
the boiler to be on when the hot plate is over the oven.
Fig. 7 shows sectional elevation of burner for boiling purposes.
Fig. 8 is a sectional elevation showing inside construction, and back part of oven.
Fig. 9 is a part plan of Fig. 8 showing double case of sides and back.
Fig. 10 is an elevation in section of oven side showing the bottom of grilling
plate, making a joint with inner edge of top part of oven door, and bottom part of
griller door.

page_text: Figs. 11 and 12 show elevation and plan of receiver for conducting the waste heat
from the oven to the nozzle at the back of hot plate.
Figs. 13 and 13* show a plan of oven burners detached.
Fig. 14 shows plan of core for mixing chamber in the bottom rail of the door
frame.
Fig. 15 shows the bottom end of lever for highering and lowering the lights for
the oven burners.
Fig. 16 shows the door knob directly over the latch.
A is my cooking range constructed with a portable plate B, just over the hole or
outlets C, for the waste heat from the oven.
The space above the plate forming a grilling chamber D, and by withdrawing the
plate, this grilling chamber then becomes a part of the oven E. The oven top
casting F, over the grilling chamber also forins part of the boiling and grilling
burners G, H, the stems H¹ or mixing chamber of the burners, being cast either on
the underside or top side, with core holes to come through to the boiling burners, or
into burner chamber.
On the top of this casting are pillars for supporting and fixing the hot plate J ;
within grooves in the hot plate, is a portable plate J' with loose lids or covers K, over
each burner, so that when one or all the burners are in use, none of the waste heat
and gas escapes into the room, but enters a receiver L at the back part of the hot
plate, this receiver has a nozzle at the top to fix the pipe to flue outlet, and a small
hot plate L' over the nozzle to utilize the waste heat.
I use the waste heat from the first oven in a second oven E¹, placed above the first
oven upon an extra support E (over the boiler E³, which is placed upon the hot
plate J, and over the receiver L, for further utilizing the waste heat as shown at
Fig. 6) to be used for raising dough and the like purposes which do not require as
much heat as for cake baking.
The outlet for the waste heat and gases from the oven is regulated by an automatic
valve M, receiving its motion from the same tap or valve R by means of a crank N
forming part of the plug, casting, and link N³, which turns the gas into the oven by
means of the pipe P; the link N¹ has two grooves by which it is attached to the
stud T, one groove regulating the flames for baking bread, and the other for meat,
when the gas is half on the flue outlet is half closed, and the outlet is closed when the
gas is turned off the oven burners.
There is also a pivotted lever T with spring T', which is connected to the automatic
link coupler T which receives its inotion from the lever T2 attached to the plug of the
tap, the lever T being operated by a projection on the oven door; when the oven door
is closed, the gas is turned up, and automatically lowered when the door opens.
I employ improved cast iron burners shown at Figs. 13 and 13ª, these burners
have squares cast upon them for facilitating screwing in and fixing by ordinary
screw key.
I construct my boiling burners with a cored mixing chamber Y for air and gas
for each burner, also with open burner chamber Y³, forming part of the same casting,
so that the position of the joint of the lid Z, over the burner chamber is close to the
drilled holes, so that leakages from the joint, instantly form part of the flame of the
burner, see Fig. 7.
Figs. 4 and 5 show an automatic valve V and link V₁, to allow the gas and waste
heat from the grilling burners to pass through the oven top into the boiling chamber,
this valve receives its motion from the grilling burner tap V. I form a double
mixing chamber Z for gas and air for the oven burners (see Fig. 14) at the back or
front of the bottom cross rail of the oven door frame casting, supplied by one gas jet W
only, and after the gas and air is received into the mixing chamber, it is divided to
supply the burners at each side of the oven, see arrows, these burners may be either
cast or wrought iron, with one end screwed into the mixing chamber Z', and the other
ends pass along the sides and the back ends screw into elbow joints and pass along the
back of the oven see Figs. 13 and 13ª.

page_text: I use an improved latch (see Fig. 1 and 16) for fastening the oven door, which with
the knob X is fitted to a projection X of the door, and made to slide in a vertical
direction by coming in contact with the incline X³, on the stationary notch X*, on the
door frame, and fastens the door by the latch falling into the notch; I use an
arrangement for fixing the gas pipe which is by two ears cast on the pipe, the pipe
boiling, and grilling taps being in one casting.
For forming the double case, for keeping in the heat, I cast snugs or projections S
on the back of the frame, and two at the top of the back casting of the oven, and two
at the top of the door frame for bolting the oven top to; the space between the double
case is filled up with slag wool, or any nonconductor of heat; S¹ is a loose plate
secured in position by projections S².
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed I declare that what I claim is :-
1. The grilling chamber constructed so that it becomes part of the oven or can be
used as a grilling chamber only, separate from the oven, as shown and described.
2. The automatic damper for regulating the opening from oven to flue outlet,
operated by the same tap that regulates the oven burners, as shown and described.
3. Automatically lowering and highering the oven burners, by the motion of the
oven door as shown and described.
4. The construction of the casting, forming the bottom of hot plate, with which are
cast all the burners and mixing chambers, and open burner chambers as shown and
described.
5. The blank plate with portable lids over the burner flames, so that all the waste
heat can be utilized, as shown and described.
6. The fixed hot water boiler, over the nozzles or receiver, arranged to receive the
waste heat from all the burners, as shown and described.
7. The second oven over the hot plate for rising the dough, or bread, (before placing
it in the proper oven to be baked) by the waste heat passing up the same chamber that
contains the fixed boiler as shown and described.
8. The receiver fixed at the back and on the sides of the oven for conducting the
waste heat to the receiver which takes the waste heat from the bolling and grilling
burners as shown and described.
9. Casting in one piece, the pipe and barrel or outer part of the taps for supplying
the gas to all the boiling and grilling burners with elbow at one end, and snugs or
ears cast on for fixing as shown and described.
10. The air and gas mixing chamber formed in the bottom rail of the door frame
casting, cast open or cored out as shown and described.
11. The cast iron burner with squares or flats cast on, so that they can be quickly
screwed into their places as shown and described.
12. Fastener for oven door, with the knob fixed directly over the latch as shown and
described.
13. Automatic motion from the griller tap, for giving suitable ventilation and
conducting the waste heat, so that it passes through the boiling chamber to the
receiver at the back of the hot plate as shown and described.
14. The construction and screwing together of the castings or frame as shown and
described.
JOHN E. WALSH,
Crossley Street, Halifax,
Agent for the Applicant.