Improvements in Apparatus for Mixing Gases.
Year: 1898

page_text: Improvements in Apparatus for Mixing Gases.
I, THOMAS THORP, of Whitefield, near Manchester, in the County of Lancaster,
Engineer, do hereby declare the nature of this invention to be as follows:-
:-
This invention relates to apparatus for mixing acetylene with air, and for
mixing other gases in which two drums of the gas meter type or with spiral
vanes sealed by water are employed, one of which is driven by the acetylene or
other gas at a higher pressure and drives the other drum which draws in the air
or other gas at a lower pressure, both discharge into a mixing chamber similarly
to the apparatus described in Specification No. 12942 A.D. 1896.
As the pressure
inside the drum acting as motor is higher than in the mixing chamber, and in
the latter higher than inside the air drawing drum, there is necessarily a differ-
ence in the levels of the water inside and outside the drums of one to two inches.
according to the pressures required. In consequence when the end or discharge
orifice of the acetylene drum, for instance, rises out of the lower level and before
it reaches the higher level, there is a rush of acetylene from the drum through
the water in the casing into the mixing chamber; and under similar conditions
a rush of water into the air drawing drum, which when the mixing chamber is
in direct communication with the pipes leading to the burner, causes a sudden
variation and unsteadiness in the lights continually repeating itself.
The object of my invention is to prevent this and my improvement consists in
forming in the vanes near to the discharge ends or slit a series of small holes
or slits for a distance about equal to the difference in the water levels. As these
emerge successively from the lower level, the gas or water will pass through
them in small bubbles or drops not affecting the steadiness of the flame and the
pressures inside and outside the drums will be equalised by the time the main
slits or ends of the vanes reach the upper levels.
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page_text: the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
-
This invention relates to apparatus for mixing acetylene with air, and for
mixing other gases in which two drums of the gas meter type or with spiral
vanes sealed by water are employed, one of which is driven by the acetylene or
other gas at a higher pressure and drives the other drum which draws in the air
or
other gas at a lower pressure, both discharging into a mixing
chamber similarly to the apparatus described in Specification No. 12942
A.D. 1896. As the pressure inside the drum acting as motor is
higher than inside the air drawing drum, there is necessarily a differ-
ence in the levels of the water inside and outside the drums of one to two inches
according to the pressures required. In consequence when the end or discharge
orifice of the acetylene drum, for instance, rises out of the lower level and before
it reaches the higher level, there is a rush of acetylene from the drum through
the water in the casing into the mixing chamber, and under similar conditions
a rush of water into the air drawing drum, which when the mixing chamber is
in direct communication with the pipes leading to the burner, causes a sudden
variation and unsteadiness in the lights continually repeating itself.
The object of my invention is to prevent this and my improvement consists in
forming in the vanes near to the discharge end or slit of each vane a series of small
holes or slits for a distance about equal to the difference in the water levels.
As these emerge successively from the lower level, the gas or water will pass through
them in small bubbles or drops not affecting the steadiness of the flame and the
pressures inside and outside the drums will be equalised by the time the main
slits or ends of the vanes reach the upper levels.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
In apparatus for mixing gases in which two drums of the gas meter type or
with spiral vanes sealed by water are used, the hereinbefore described improve-
ment which consists in forming near to the discharge ends or edges of the vanes
a series of small holes or slits substantially as and for the purpose hereinbefore
described.
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