IMPROVEMENTS IN PORTABLE COOKING AND HEATING APPARATUS, THE HEAT BEING DERIVED FROM THE USE OF HYDROCARBON OIL
Year: 1876

page_text: PROVISIONAL SPECIFICATION left by David Pitcairn Wright at the Office
of the Commissioners of Patents on the 15th May 1876.
DAVID PITCAIRN WRIGHT, of the Firm of Wright and Butler, Lamp Manu-
facturers, of Birmingham, in the County of Warwick. "IMPROVEMENTS IN
PORTABLE COOKING AND HEATING APPARATUS, THE HEAT BEING DERIVED FROM
THE USE OF HYDROCARBON OIL."
My Invention consists in constructing portable cooking and heating apparatus
by making the oil vessel the base or stand, to which vessel I apply elevated straps
for forming handles, one at each end, and at the back two strong straps terminating
with hinge joints. These straps are further secured to a metal plate (say) of tin
placed above the regulator of the lamp wick, and to which plate stops are soldered
connecting the same with the lateral handles, which stops form the rest or supports
for a square or rectangular iron case forming the body of the cooking or heating
apparatus attached to the hinge joints before mentioned, by which means the iron
case of the apparatus may be moved from a vertical to a horizontal position for the
purpose of triming the lamp or supplying it with hydrocarbon oil, for the burning
of which the arrangement of the lamp is particularly applicable. The cone that
covers the lamp burner when in use is attached to the iron case by two angular
iron plates which forms and defines the length of the chimney so as to centrally
concentrate the heat above the so-formed chimney within, placing (by preference) a
circular lining near the diameter of the outer body or case which allows room for
heated air to accumulate within the outer and inner case. Through perforations or
openings at the top of the inner case the heat will pass to the outer case to escape
through perforations made for that purpose. On the top a circular opening is
formed for receiving a portable cover, culinary vessels or portable oven, which
being an important adjunct I will describe:-It consists of a short length of circular
tubing of nearly the same diameter as the inside of the circular opening at the
top of the angular case or body before described:-This circular case is secured to a
raised or otherwise formed pan having a hole in its bottom concentric with the
circular tube or case connected with it, so that when the tube is inserted in the top
of the apparatus the said pan will rest on the top. To this pan a dome is hung,
with an inner lining and central inside openings for the heat to escape and pass
down inside the outer casing, forining the dome, and escape through a row of

page_text: perforations near the bottom sides of the dome; thus in cooking a suitable rest is
placed in the pan, leaving free egress for the heat to ascend and escape around the
sides of the rest. On this rest the cooking pan is placed for holding the food to be
baked, which being covered down by the dome the cooking will satisfactorily
proceed. I vary the size of the apparatus according to requirement by making
the same and lamp vessel of a rectangular shape, using two or more burners, or by
extending the oil vessel two or more separate apparatuses may be applied to the
saine vessel, the burners being placed centrally with each apparatus, and connect-
ing the said several apparatuses to the oil vessel by hing joints (as before
described) or other equivalent means. The said heating and cooking apparatus
being of the same size, the covers, cooking vessels, or ovens may be made inter-
changeable, and if necessary the space between the angular outside case and the
circular interior case may be arranged for holding water supplied through a
convenient feed way at the top and drawn off by an external tap."