IMPROVEMENTS IN APPARATUS FOR CARBURETTING ATMOSPHERIC AIR FOR ILLUMINATING PURPOSES
Year: 1875

page_text: PROVISIONAL SPECIFICATION left by Henry Hahn at the Office of
the Commissioners of Patents, with his Petition, on the 4th
November 1875.-A communication from abroad by Edward J.
Daschbach, of Pittsburg, Pennsylvania, United States of America.
I, HENRY HAHN, of Lombard Street, in the City of London, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
APPARATUS FOR CARBURETTING ATMOSPHERIC AIR FOR ILLUMINATING PURPOSES,"
(communicated to me from abroad by Edward J. Daschbach, of
Pittsburgh, Pennsylvania, United States of America,) to be as
follows:-
This improved apparatus consists of a carburetting chamber sur-
rounded by a feed tank in which the gasoline or other hydrocarbon
substance is maintained above the feed passage into the carburetter by
atmospheric pressure, so that a regular automatic feed is obtained by the
oil in the carburetter, and the carburetter is provided with an inlet pipe
projecting below the oil inlet. The carburetter which is immersed to
the top in the supply tank, and has an opening through which to be
fed from the tank. An air inlet pipe extends below the oil inlet, and

page_text: has an air spreader at the bottom. There is a gas pipe and filler for the
supply tank. When the supply tank is filled the air in it being forced
through the feed orifice into the carburetter the oil will be limited as to
the height it will rise therein by the compressed air. The filler being
then closed the oil in the supply tank will be held back by the vacuum,
while the oil in the carbureter is taken up by the air through the gas
pipe to the burner until the oil is reduced to the level of the feed
passage, so that oil will flow through from the supply tank and air
from the carbureter will take its place, rising to the top, and allowing the
oil to flow till it rises high enough to shut the passage. When the
tension of the air in the carbureter is reduced to atmospheric pressure
or slightly below by the exhaust to the burners fresh air will flow in
through the air inlet pipe, passing down into the oil a little, and
spreading out in it under the spreader so as to mix thoroughly.
When the apparatus is to be filled the cocks in the air and gas pipes
are closed, and the fluid poured through the inlet so as to rise in both
vessels to the top of the feed opening. It then ceases to rise in the
carburetting vessel on account of the pressure of air not being able to
escape, and thus seals the carburetter, but continues to rise in supply
tank until that is full.
In operating the apparatus the fluid in the carburetting vessel is
evaporated until below top of the feed opening when gas will escape
from the carburetting vessel, ascend to top of supply vessel and balanco
the pressure in carburetter, thus enabling the fluid to again flow into it
until the top of the feed opening is reached. This will be automatically
repeated until the fluid has been nearly or quite exhausted in the supply
vessel below the feed opening. Thus the fluid stands always at the
same or nearly the same level in the supply vessel, and gives a uniform
quantity regularly undergoing the process of evaporation and producing
a steady unvarying light.