Year: 1889

page_text: Date of Application, 8th Apr., 1889
Specification Accepted, 18th May. 1889
We, ROBERT BAILLIE MAIN and ARCHIBALD POLLOCK MAIN both of the firm of
R. & A. Main, Gas Engineers, Argyle Works, Glasgow, 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:
This invention relates to gas heating apparatus for grilling, boiling and toasting
and the improvements have for object to render such apparatus more readily con-
vertible from the form in which it is adapted for heating cooking utensils or other
articles placed over it to the form in which it is better adapted for radiating
downwards the heat generated by the combustion of gas and effecting such cooking
operations as grilling or toasting.
As represented in the accompanying drawings in vertical section at figure 1 in plan
at figure 2 in end elevation at figure 3 and in cross sectional detailed views figures +
and the improved apparatus consists of a pair of gas burners A, A, connected to a
gas supply pipe B and provided with a number of jet orifices the flame from which
plays upon iron frets or grids C formed with knobs or projections c for retaining and
radiating heat, whilst the products of combustion pass up mainly through a central
funnel D formed in a hot plate E over the frets. The hot plate E is grated or formed
with orifices e through which such portions of the gases as do not reach the funnel D
may pass upwards; and on each side of the funnel, one two or more pivotted flaps or
doors F are fitted to constitute when closed as represented in figure 4 part of the hot
plate E which serves to guide the flame and radiate downwards the heat of the gas
upon food placed in a tray or other dish below to be toasted or boiled. The doors or
flaps F are pivotted by means of pins f formed on their ends and passed through
orifices in end plates or flanges E' formed on or secured to the hot plate E and they
are adapted to be tilted up, as indicated at figure, to form supplementary funnels or
openings for the upward passage of the gas flame when it is desired to use the
apparatus for boiling and grilling over the fire. The opening and closing of the doors
or flaps F is effected by means of a rod G provided with a handle G and having
formed on it at points immediately under the ends of the doors projecting lever
arms g which are fitted to tilt open the doors or flaps or lower them according as the

page_text: _rod is turned to right or left. The rod G is fitted in a bush H in which it is free to
turn and slide to an extent which is limited by a stop pin g¹ passing through a slot h¹
in the bush the slot having in it a notch to engage the pin g and prevent the rod G
turning and the doors closing after operating the device to open them. The improved
apparatus may be fitted in any suitable framing provided with a stand for the support
of culinary utensils over the gas fire, or as represented at figure 1 it may be fitted in
connection with or form part of a stand I furnished with other ordinary arrangements
of gas burners for heating and cooking; and in conjunction with the apparatus there
is or may be fitted a movable sliding frame J provided with ledges; on which may be
placed at different levels or in more or less close proximity to the heated grid, a tray
or shelf for holding the food to be cooked. The frame J is supported by means of
flanges j formed on or secured to the plate E.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :--
1. The combination of parts constituting the improved gas grilling apparatus
herein before described with reference to the annexed drawings.
2. In a gas grilling apparatus the arrangement of tilting flaps or doors over the
heated fret work operated substantially as described either to permit the upward
passage of the flame or to direct it on the fret-work to radiate downwards the heat as
and for the purpose set forth.
.
3. In a gas grilling apparatus the provision of a movable sliding frame, as J with a
number of ledges for supporting trays or shelves substantially as described with
reference to the annexed drawings.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow,
Agents.