(57) A stove or heater in which acetylene is used for heating purposes comprises a vessel
(1) containing calcium carbide (2) to which water is supplied via a conduit (3), whereby
the water and calcium carbide react to form acetylene. The acetylene passes through
a jet (8) and a mixture tube (11), and burns at the outlet holes (13) of a rose (12).
Some of the burnt gas produced is sucked back into the mixture tube (11) via a return
tube (14). The extent to which burnt gas is sucked back into the mixture tube (11)
is controlled by a threaded control valve (10), which control valve (10) also controls
the extent to which air enters the mixture tube (11) via an air inlet (9). Thus, the
valve (10) is a temperature control device.
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