Year: 1887

page_text: Date of Application, 9th Sept., 1887
Complete Specification Left, 9th June, 1888
Complete Specification Accepted, 31st Aug., 1888
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 mostly to further improvements on my patent No. 12,460,
October 1st 1886. For still further favouring expansion and contraction.
I find now that the two inner side plates do not require bolting to the snugs on the
back plate, that they only require bolting on the front edges of the snugs on the door
frame and the back plate is constructed to slide into its place without bolting as in the
above patent, now all the inner plates are free to expand or contract as there is only a
bolt at the bottom of each side plate, and at the bottom of the back outer plate in such
a position that it will accommodate itself to expansion and contraction. I also have
an improved manner of fixing the inner plate of the oven door for holding the non-
conducting material, I cast a piece on the bottom and inner side of door casting so
that by sliding one end of the plate under it only one screw is required at the other
end of the plate for fixing it instead of six screws as now used for fixing the same
plate. The piece cast on the bottom is also used for forming a vessel for receiving the
water formed by condensation which takes place just after lighting the oven burners
the above vessel holds the water until the oven gets hot. The extra heat will then
revapourize the water and take it up to the flue outlet. Instead of its going on to the
floor as in other gas stoves. Also a further improvement on my cast iron oven burners
having now a piece cast on close to and above the jet holes in such burners, which
piece stands out far enough to form a guard to keep the drippings from the meat and
the juice out of pies from making up the holes in the burners.
I now cast the gas jets to the tops of the hot plate, I also cast the jet on the cap or
plug for screwing on to the end of the pipe for supplying the oven burners.
Also a further improvement in the griller burners having now a jet at the end which
carries the flame instantly from the front row of burners or jets to the back row which
prevents a waste of ons.

page_text: My patent automatic motion from oven door for lowering the oven burners may also
be used for automatically turning the gas entirely off and make use of the ordinary
pilot or flash light so that on closing the oven door the burners would be relighted.
Also an improved heat deflector for giving extra top heat by an independant burner in
a special chamber made so that the products from the oven burner and from cooking
cannot effect it and which receives its supply of air through holes in the back of the
stove close to the burner, so that the heat or flame moves from back to front and from
front to back under and over a division plate in the centre of the chamber to the flue
outlet; and the inlet of cold air to this burner is regulated by an automatic damper
which receives its motion from the same tap that turns the gas on to the
burner.
I have also an improved arrangement which gives a better distribution of the heat for
baking and cooking meat which is effected by having the oven tins and grids of a circular
or disc shape and constructed so that a circular horizontal motion can be given to it by
hand or spring motor or other motive power; over the tins or grids I have a spindle
or spit for roasting meat on, constructed so that it can revolve in bearings fixed on each
side of the horizontal disc or grid and the position of each bearing is at the end of the
diameter line.
The above spindle receives an automatic motion from the motion given to the hori-
zontal disc, tin or grid; so that the spindle both moves in an horizontal and in a
circular plane besides revolving in its own bearings which automatic motion is obtained
by fixing a cross or star on one end of the spindle so that as each finger of the cross
comes in contact with suitable fixed projections in the oven, the spindle is made to
revolve. Also an improved griller that will cook both sides of a chop, steak or rasher
at the same time. The chop or steak to be on a disc which may be made of wire and
to revolve in a vertical plane; motion being given to it by hand, or an automatic
spring or other motor with a gas griller burner on each side of the disc so that the
chops can be cooked in half the usual time and retain more gravey in the meat. The
above may be in a suitable chamber so as to retain the heat with a suitable fire brick
at the back of each burner for retaining and deflecting the heat on to each side of the
disc containing the chops or steaks being cooked. The automatic motors for both
baking and grilling may be made to stop and signal or call the attention of the
attendant at any given time and lower or turn off the gas. Also a small oven may be
used as a deflector warming stove with one burner and so that all products will pass
through what is called the boiling chamber (as in my Patent No. 12,460 aforesaid) to
the receiver or flue outlet.
Dated this 8th day of September 1887

page_text: I THOMAS GREENWOOD of 5 Wentworth Terrace, Pellon Lane, Halifax in the
County of York, 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 :-
My invention relates mostly to further improvements on my patent No. 12460, dated
October 1st 1886.
For still further favouring expansion and contraction, I find now that the two inner
side plates do not require bolting to the snugs on the back plate, that they only require
bolting on the front edges of the snugs on the door frame, and the back plate is
constructed to slide into its place without bolting as in the above patent; now all the
inner plates are free to expand or contract, as there is only a bolt at the bottom of each
side plate, and at the bottom of the back outer plate, in such a position that it will
accomodate itself to expansion and contraction.
DESCRIPTION OF DRAWINGS.
Fig. 1 is a front elevation of my improved cooking range or oven showing my
revolving grills or grids.
Fig. 2 is an end elevation of Fig. 1.
Fig. 3 is a front elevation of oven with an improved griller for cooking both sides
of chops or steaks at the same time.
Fig. 4 is an end view of Fig. 3.
Figs. 5 and 6 are detached details of parts of Figs. 3 and 4.
Fig. 7 is a plan of bearing plate for carrying the circular flat grids.
Figs. 8, 9, 10, and 11, are elevations and plan of circular drip tin and circular flat
grid into which the tin fits.
Figs. 12 and 13 are detached views of my improved heat deflector.
Figs. 1 and 2.
A is the oven with my improved arrangement which gives a better
distribution of heat for baking and cooking meat, which is affected by having the oven
tins B flat grids C, C' of a circular or disc shape, and constructed so that a circular
motion can be given to them by hand or spring motor, or by other regular motive
power; the circular flat grids C, C', have teeth around their outer edge or periphery,
and are carried by the bearing plates H provided with suitable runners H¹. Over
the tins B or grids C, I have a revolving cage grid G for roasting meat in, constructed
so that it can revolve in its bearings, which are fixed on each side of the horizontal
bearing plates H.
The above grid receives an automatic motion from the motion given to the horizontal
circular flat grid C, which takes the form of a bevel wheel, so that it revolves in its
own bearings, and receives its motion from the vertical shaft K at the back,
inside the oven, by pinion wheels L, L, and bevel wheels M, M, and cross shaft N at
the top.
Below the grid C is a second similar revolving circular flat grid C' operated in a
similar manner. Or if the grids in the large ovens are turned half way round when

page_text: required, it will answer the same purpose as a continuous circular motion. And such
half turn can readily be got, by a rack N' geared into a wheel N on the spindle of
the grill, similar to Figs. 3, 4 and 6, with rack passing through oven sides, so that by
taking hold of the rack, the grid can at any time be turned half way round, without
opening the oven door.
The automatic motors for baking and grilling may be made to stop and signal or
call the attention of the attendant at any given time, and automatically lower or turn
off the gas. I employ a worm J¹ on the shaft K which gears into a worm wheel T
on a stud T', on the same stud is the notch plate U, having a notch U', the notch plate
is driven by its friction against the wheel T which is regulated by the spring V, and
wing nut or thumbscrew V¹; at any given time the projection W' on the lever W drops
into the notch and lowers or turns off the gas, at the same time ringing the bell by
means of the link X with its slot X'.
D is an improved special heat deflector for giving extra top heat by an independent
burner Y in a special chamber Y¹ made so that the products from the oven burner Y³,
and from cooking, cannot effect it, and which receives its supply of air through holes
in the back of the stove close to the burner, so that the heat or flame moves from back
to front, and from front to back (under and over a division plate E in the centre of
the chamber) to the flue outlet.
The end castings for forming the deflector heater instead of being two independent
castings, the side plates may have grooves cast in them, and be used in place of two
separate end castings.
Figs. 3 and 4 show a small oven with an improved griller G' that will cook both
sides of a chop, steak, or rasher at the same time. The chop or steak is placed on the
griller disc G which may be made of wire and revolve in a vertical plane, (motion
being given to it by hand, or an automatic spring or other motor may be applied)
with a gas griller burner R on each side of the disc so that chops can be cooked in
half the usual time, and retain more gravey in the meat.
The above may be in a suitable chamber S, so as to retain the heat.
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 ovens as shown and described.
2. The combination of the horizontal grids C, C, and the vertical grid G, operated
as and for the purposes, substantially as shown and described.
3. The automatic motions for ringing the bell and lowering or turning off the gas
in combination with a spring or other regular motive power, substantially as shown
and described.
4. The deflector heater D in combination with the horizontal grids, vertical grids,
and oven, substantially as shown and described.
5. The vertical disc grill in combination with the small oven substantially as shown
and described.
D
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JOHN E. WALSH,
Crossley Street, Halifax,
Agent for the Applicant.