Year: 1887

page_text: I, WILLIAM PHILLIPS THOMPSON, F.C.S. M.I.M.E. of the Agency for Foreign
Patent Solicitors, 6 Lord Street, Liverpool, and 6, Bank Street, Manchester, both
in the County of Lancaster, and 323, High Holborn, in the County of Middlesex,
Civil Engineer, do hereby declare the nature of this invention to be as follows:-
The object of this invention is to provide an automatic meat roasting oven which
insures the regular working of the apparatus and avoids the inconveniences presented,
in practice, by the various apparatus at present in use.
On the top part of the cylindro-conical lid of the roasting oven is adapted a movable
cross-piece which carries a box containing the rotating mechanism actuated by a fly
wheel.
The suspension piece consists of a cone, the upper part of which receives the last
driving wheel, whilst the lower part presents a slightly rounded form, and rests in a
small step fixed in the bottom of the metallic box enclosing the mechanism.
The cone is kept in position at its upper part by a potence, and at its lower part by
a rod of very small diameter passing through the before-mentioned step, and having
its lower end bent to the shape of a hook for the purpose of fastening to it the chain
by means of which the piece to be roasted is suspended in the oven.
This simple arrangement offers but very little resistance to rotation, costs little to
construct, and it is not liable to get out of order.
It has also been found that various forms of conical fixings of the fly-wheel on its
arbor, got fast with grease and dirt, and rendered difficult the removal of this wheel
for the purpose of cleaning it.
In the improved apparatus the fly-wheel arbor is cylindrical, and is provided at its
lower part with a cross-pin and a cylindrical hole is bored through the nave of the
fly-wheel, the diameter of this hole being slightly larger than that of the arbor. The
lower face of the nave is provided with a diametrical groove into which the above
cross-pin enters.

page_text: Thus nothing prevents the removal of the fly-wheel, still when the latter is put
into its place, it is connected with the arbor by means of the cross-pin, which causes
the parts of the system to rotate as a whole.
In order to render optional the use of coal or gas as fuel a special kind of movable
roasting stove is employed, which is to be placed opposite an opening made in the
cylindrical part of the roasting oven.
When coals are used, a special grate is placed in the roasting stove; this grate is
suspended by means of hooks with which it is provided to snugs fixed to the roasting
stove. The grate is also kept in position at its lower part by claws penetrating behind
projections, which form integrant part of the casting.
When gas is to be used the above grate is taken away, and replaced' by a curved
metallic reflector, provided with fastening projections, which rest upon the above
mentioned snugs whilst its lower part is kept in position between snugs cast on the
bottom of the roasting stove; a movable gas-burner is placed before the reflector.
The special burner used for this purpose consists of a horizontal tube in the fore
part of which holes have been bored, it is also provided with a tap; at each end of
the horizontal tube a vertical tube is adapted, which has, likewise, holes bored on its
fore part, and is provided at the upper end with hooks by means of which the burner
is hung to snugs inside the roasting stove.
It will be understood that the special disposition of the horizontal and vertical tubes
of the burner has for result the production of a wide flame, which can be regulated
by turning the aforesaid tap, and which insures the uniform roasting of the piece hung
up in the oven.

page_text: t
.
I, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street, Manchester, both in
the County of Lancaster and 323, High Holborn, in the County of Middlesex, Civil
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 :-
The object of this invention is to provide an automatic meat roasting oven which
insures the regular working of the apparatus, and avoids the inconveniences presented
in practice by the various apparatus at present in use.
The invention is best described by aid of the accompanying drawings:-
Figure 1 shows a perspective view of the improved roasting oven.
Figure 2 a vertical section showing the device by means of which the piece of meat
to be roasted is suspended, and the mode of application of the vane wheel to the
driving arbor of the mechanism.
Figure 3 a front elevation of the fire place provided with a special gas burner.
Figure 4 a vertical section.
Figure 5 is a view of the grate which can be adapted to the fire place when it is
wished to burn coal etc.;
Experience has shown that one of the most delicate points in roasting stoves is
the mode of suspending the piece of meat to be cooked. The very simple arrange-
ment which forms one of the features of this invention ensures the regular working
of the apparatus, and avoids the disadvantages presented in practice by the various
devices hitherto employed to fulfil the same purpose, such as (amongst others) the
use of a pivot revolving on movable spheres.
On the top part of the cylindro-conical lid A Figure 1, of the roasting oven B,
is adapted a movable cross. piece supporting the driving mechanism which is
This mechanism
actuated by the horizontal wheel C provided with vanes or sails.
shown on Figure 2 consists of the arbors, wheels and pinions, a, b, c, d, e.
The improved suspending device consists of a cone f the upper part of which
is provided with the last driving wheel e, whilst its lower part presents a slightly
rounded form and rests on a small step g fixed at the bottom of the metal box j
enclosing the mechanism.
The cone is kept in position at its upper part by a bearer i and at its lower

page_text: part by a rod of very small diameter passing through the step g, and terminating
at its lower end in a hook for the purpose of attaching to it the chain, by means
of which the piece to be roasted is suspended within the oven.
.
This simple arrangement offers but little resistance to rotation, costs little to
construct and is not liable to get out of order.
It has also been found that the various forms of taper connections of the boss of
the vane wheel C with its arbor frequently got fast with grease and dirt, and rendered
the removal of the said wheel difficult, for the purpose of cleaning it.
In the improved apparatus, the arbor a is cylindrical and provided at its lower part
with a cross pin k; the navel of the vane wheel is provided with a cylindrical hole,
the diameter of which is slightly larger than that of the arbor a. The lower face of
this nave is provided with a diametrical groove, in which the aforesaid cross pin k
enters. Thus, though nothing prevents the removal of the vane wheel; yet when
the latter is put into its placo, it is connected-with-its arbor a by means of the cross
pin k, which causes the parts of the device to rotate as a whole.
In order to render optional the use of coals etc. or gas as fuel, a special kind of
movable roasting stove is employed, which is placed opposite an opening made in the
cylindrical part B of the roasting oven, as shown on Figure 1.
When coal is used, the grate E of special form shown in Figure 5 is placed in
the roasting stove D; this grate is suspended by means of hooks o with which it
is provided, to lugs m fixed to the roasting stove Figures 3 and 4. The grate is
also maintained in position at its lower part by means of claws n penetrating
behind projections p forming integral parts of the casting.
+
When gas is to be used, the grate E is taken away and replaced by a curved metallic
reflector Figures 3 and 4, provided with fastening lugs, which rest upon the afore
mentioned projections m and having its lower part kept in position between snugs &
cast with the bottom of the stove D. A movable gas burner is placed before this
reflector..
The special burner used for this purpose is shown in the drawings on Figures 3
and 4, it consists of a horizontal tube t in the fore part of which holes have been
bored; it is also provided with a tap u at one of its outer extremities. At each end
of the tube t and inside the stove is adapted a vertical tube v which bas likewise holes
bored on its fore part. These two vertical tubes are each provided at their upper end's
with a hook, by means of which the burner is hung to snugs x on each side of the
stove D.
It will be understood that the special arrangement of the horizontal tubes t and of
the vertical ones v result in the production of a wide flame which can be regulated by
means of the tap u, and insures the uniform roasting of the piece of meat hung up
in the oven.
As shown on Figure 1, the body B of the roasting oven can be made either of thin
sheet iron, or more economically, of cast iron; in the latter case the weight of the
apparatus will be reduced by making the door of the roasting oven equal to half the
surface of the cylindrical part B. The bottom of the oven can, for the same purpose,
be suppressed and replaced by a disc of sheet iron on which a movable dripping pan
is laid for the purpose of collecting the gravy..
It will be understood that in this arrangement the stove D may be constructed
separately as shown on the drawing, or cast with the body B of the roasting oven, the
various improvements described in the foregoing being in no wise altered whether
the cylindrical body is of sheet iron or of cast iron.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed as communicated to
me by my foreign correspondent I declare that what I claim is :-
1. In an apparatus for roasting meat, the device for suspending the meat to be
roasted within the stove, which consists of a cone having a blunt apex so as to turn
freely on a steel step, through the centre of which a hole is drilled to admit a light
rod, to which the meat is suspended, to pass through substantially as described.

page_text: 2. The means adopted for connecting the vane wheel to its arbor, which consists
in providing the lower face of the boss of the aforesaid wheel with a semi-circular
groove, which engages a cross pin passing through the said arbor, substantially as
described.
3. A cast iron vertical roasting stove constructed to admit either a grate being
applied for burning coal, coke and the like, or a gas burner and reflector, or these
parts being susceptible of being applied alternately to the stove in the manner
substantially as set forth.
4. The gas burner substantially as described and shown, consisting of three per-
forated tubes connected to each other at right angles, and capable of being hung up
within the aforesaid roasting stove.