IMPROVEMENTS IN AND RELATING TO APPARATUS FOR GRILLING PURPOSES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
We, ALFRED ROTHWELL and FERDINAND ROTHWELL, both of 16 Water Street,
in the City of Liverpool in the County of Lancaster, Restaurateurs, do hereby
declare the nature of our said Invention for IMPROVEMENTS IN AND RELATING
TO APPARATUS FOR GRILLING PURPOSES to be as follows:-
Our Invention has for its object to so construct the gridirons of grilling
apparatus that they will not char, or cook unevenly the meat under treatment and
our invention also provides for an easy adjustment and handling of the gridiron.
Our Invention consists in forming a gridiron with hollow bars through which a
circulation of water is maintained, which circulation of water keeps the bars of the
gridiron at a temperature at which the meat being cooked will not char at the
points of contact with the bars.
In construction the gridiron is composed of a series of hollow bars, or tubes which
extend between front and back bearers of hollow construction. The front bearer is
provided with a removeable cover, so that access can be had to the interior of the
gridiron and a partition is provided so that the water from the front bearer will
circulate through a portion of the bars of the gridiron to the back bearer and
return through the other portion of the bars to the front bearer.
The apparatus for adjustment and handling the gridiron is constructed as
follows; The ends of the front bearer are flanged and onto these flanges are
attached tubes, or hollow trunnions, which are held by and work in bearings formed
on upright sleeves. These sleeves slide on vertical side bars positioned one on each
side of the fire place, the gridiron being so arranged that it will rock over on its
trunnions so as to be over, or away from the fire. This rocking over of the gridiron
is effected by a tooth wheel and pinion gear, the tooth wheel being mounted on the
trunnion of the front bearer and the pinion being carried by one of the sliding
sleeves and worked by a hand. wheel. To balance the gridiron a counter weight is
provided situated at the side opposite the gridiron. turning gear and the counter
weight is placed on a lever and is hung inwards, the counterpoise being effected by
toothed wheels, one of which is mounted on the gridiron trunnion and the other on
a secondary journal on the sliding sleeve, which journal also carries the balance
weight lever. One trunnion of the front bearer is provided with an elbow joint to.
which is attached the water supply pipe, the other trunnion being similarly fitted

page_text: and connected with an outlet pipe. The vertical side bars which carry the sliding
sleeves and gridiron are supported on pedestals and held at their upper ends by
brackets. Vertical screwed rods are provided one on each side of the fire place, the
end of which take into screwed bosses on the sliding sleeves. The upper ends of
these vertical screwed rods are held by and work in bosses formed on brackets
carried by and fixed to the vertical side bars. These screwed rods are worked by
bevel wheels from a horizontal counter shaft worked by a hand wheel, by this
means the gridiron can be vertically adjusted to suit the various requirements.
By our Invention we are enabled to keep the gridiron bars in a condition that
they will not char the meat under treatment nor will they become burnt, but
maintain a condition most suitable for the uniform cooking of the meat. Provision
is also afforded for balancing the gridiron and adjusting it at any desired angle over
the fire, or at any required height above the fire.
:
Wė, ALFRED ROTHWELL, and FERDINAND ROTHWELL, both of 16 Water Street,
in the City of Liverpool, in the County of Lancaster, Restaurateurs do hereby
declare the nature of the said Invention for IMPROVEMENTS IN AND RELATING
TO APPARATUS FOR GRILLING PURPOSES" and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement :-
Our Invention has for its object to so construct the gridirons of grilling apparatus
that they will not char, or cook unevenly the meat under treatment and our
Invention also provides an easy adjustment and handling of the gridiron.
Our Invention consists in forming a gridiron with hollow bars, through which a
circulation of water is maintained, which circulation of the water keeps the bars
of the gridiron at á temperature at which the meat being cooked will not char at
the points of contact with the bars, and the gridiron is so constructed that it can
be adjusted vertically and swung off, or on the fire.
The following is a description of. this Invention in such full, clear, and distinct
language as to enable any one skilled in the art to which it belongs to make and
put the same into practice, reference being had to the annexed sheet of Drawings
and to the letters and figures of reference marked thereon, like letters and figures
being used to denote the same, or corresponding parts throughout the Drawings.

page_text: Figure 1 is a front elevation of an apparatus for grilling purposes :constructed
according to our Invention.
Figure 2 is a sectional plan of the centre part of Figure 1, taken at the line X X.:
Figure 3 is a vertical section taken at the line Z Z Figure 1.
Figure 4 is a detail shown partly in section, of a part of the gridiron and
connection.
Figure 5 is an end view shown partly in section of the gridiron shown at
Figure 4.
In construction the gridiron A is composed of a series of hollow bars or tubes a
which extend between a front bearer B and a back bearer O. These bearers
B and C are of hollow construction, and the hollow bars, or tubes a are screwed, or
sweated with solder into the bearers B and C as shown at Figures 4 and 5. The
front bearer B is provided with a removeable cover b so that access can be had to
the interior of the gridiron A and a central partition 6¹ is provided in the front
bearer B so that the water, which is supplied as hereafter described to the front
bearer B will circulate through a portion of the bars a of the gridiron A to the
back bearer C and return through the other portion of the bars a to the front
bearer B. To enable the apparatus to be adjusted and handled in relation to and
over the fire place D in connection with which it is fitted, the gridiron A is
constructed as follows: the ends E E of the front bearer B are extended on each
side of the gridiron, so as to form hollow trunnions, which are held by, and work in
bearings FF formed on upright sleeves H H¹. These sleeves H H³ slide on the
vertical side bars J which are positioned one on each side of the fire place D, the
gridiron A being so arranged that it will rock over on its trunnions E E¹ so as to
be over the fire place, as shown at Figure 3, or it will hang down in front of the
fire place as shown at Figure 1. This rocking over of the gridiron A is effected by
a toothed worm wheel K which is fixed onto the trunnion E of the front bearer B
and a worm. L which works into the wheel K and is carried on the sliding
sleeve H and is worked by the hand wheel M. In lieu of the worm wheel gear,
bevel, or ordinary tooth gear may be substituted if desired. To balance the
gridiron A it may be provided with a counter weight, which can be placed at the
side opposite the turning gear K, L on a lever, and hung inwards, the counterpoise
being effected by toothed wheels one of which is mounted on the gridiron
trunnion E and the other on a secondary journal on the sliding sleeve H¹, which
journal also carries the balance weight lever. The trunnion F' is provided with an
elbow to which is attached a telescopic water supply pipe d¹ and the trunnion F
is also provided with an elbow f to which is connected a telescopic water discharge,
or outlet pipe d. These pipes d d lead to a cistern or other water holder from
which the water circulates through the gridiron A. The vertical side bars J which
carry the sliding sleeves H H and thereby the gridiron A are supported on
pedestals P and held at their upper ends by brackets. Vertical screwed rods Q are
provided one on each side of the vertical side bars J, the lower ends of which take
into screwed bosses R on the sliding sleeves H H¹. The upper ends of the screwed
rods Q are held by and work in bosses S formed on brackets T which are carried
by and fixed to the vertical side bars J. The upper ends of the screwed rods Q are
provided with bevel wheels e and they are worked by bevel pinions i on a
horizontal counter shaft g supported by and between the side bars J. A hand
wheel h is provided on one end of the counter shaft g for working the gear just
described by which means the gridiron A can be adjusted vertically to suit the
various requirements.
By our Invention we are enabled to keep the bars a of the gridiron A in a
condition that they will not char the meat under treatment, nor will they become

page_text: burnt, but maintain a condition most suitable for the uniform cooking of the meat.
Provision is also afforded for adjusting and balancing the gridiron at any desired
angle over the fire or at any required height above the fire.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed, we declare that what
we claim is:
'
First The method substantially herein described of keeping the bars of gridirons
at a temperature that will not char, or burn the meat under treatment, which
method consists in causing a current of water to pass through the bars of the
gridiron substantially as set forth.
Second The combination in a gridiron of a hollow front bearer such as B and
back bearer such as C connected together by hollow bars such as a through which
circulation of water is caused to pass substantially as set forth.
Third The construction of the hollow gridiron A and hollow trunnions E E¹ for
the purposes specified and operating' substantially as set forth.
Fourth The combination of a hollow gridiron. A sliding sleeves H H¹ and side
bars Jand telescopic water pipes d d substantially as set forth and operating as
described.'
Fifth The combination of the hollow gridiron A sliding_sleeves H H' and side
bars J, telescopic pipes DD¹ screwed rods Q and bevel gear E F substantially as set
forth for the purposes specified.
Sixth The combination of the gridiron A trunnions E E¹ and worm and worm
wheel L K substantially as set forth for the purposes specified.
Seventh The combined arrangement of parts, substantially as set forth and
operating as and for the purposes specified and as shown in the Drawings hereto
annexed.
Dated this coventh devy of November 1884.