IMPROVED MEANS OF GENERATING AND STORING CERTAIN GASES SO THAT SAME MAY BE EMPLOYED AS A SUBSTITUTE FOR STEAM AND OTHER MOTIVE POWERS.
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by Charles [Francis] Pollak at the Office
of the Commissioners of Patents on the 23rd Juno 1883.
CHARLES [FRANCIS] POLLAK of 54 Wool Exchange, Coleman Street. City of.
London. [E.C] IMPROVED MEANS OF GENERATING AND STORING CERTAIN GASES
SO THAT SAME MAY BE EMPLOYED AS A SUBSTITUTE FOR STEAM AND OTHER
MOTIVE POWERS.
The object of my invention is, to find a substitute for steam which can be
produced by a less expenditure of fuel & which will accomplish the same effect for
producing motive power or pressure. For this purpose I employ the capacity
which water and other liquids have to absorb certain gasses, which after wards can
be set free by heat; and reabsorbed by cooling. Especially applicable for this
purpose is the combination of ammonia gas (Hz N.) with water, as the latter is
capable of absorbing over 500 times its bulk of the former, and the water gives up
the whole of its gas when heated to 60° C, therefore it need not be brought to a
higher temperature. Instead of heating water and using the produced steam as a
motive power, as done at present I heat the ammonia solution and use the expelled
gas for the same purpose.
It might be too expensive and in some cases dangerous to health to drive the
gases out into the air after they have accomplished the labour required, therefore I
construct an apparatus in which the same liquids and the same gases are being
constantly reused and no escape of gas or liquids is possible. The apparatus
mentioned consists of two principal parts, one for freeing the gases by heat and the
other for cooling the liquid which has given up its gas, and then reabsorbing the
gas after the same has accomplished its work.
The apparatus for freeing consists of a system of tubes giving a large heating
surface, placed under a reservoir and connected with the same. This reservoir
has the object of storing the gas produced in the heated tubes, and is fitted with
safety valve, manometer, gas taps, water glass extending to the bottom of the
heated tubes. Under the heated tubes is the fireplace.
The apparatus for reabsorbing the gases consists of a spiral coil of tubes leading
at the bottom into a reservoir & placed in a vessel through which cold water is

page_text: continnously passing. There two parts are connected by means of two pumps of
equal capacities in the following maner: one pump draws out of the reservoir in
the absorbing apparatus and delivers into one end of the tubes placed over the fire
in the freeing apparatus, the other pump draws out of the other end of those tubes
and delivers into the top outlet of the spiral coil in the absorbing apparatus.
There pumps are coppled together, and their stroke can be regulated in such a
manner that both draw and deliver an equal quantity of liquid.
The produced gas is sent out of the reservoir in the freeing apparatus into the
engine or where pressure is required and after having done its task back into the
coil in the absorbing apparatus, the liquid after having given up in the heated
tubes its gas is sent also into this coil and is cooled, the gas strikes it, the liquid
absorbs the gas again and reaches the reservoir on the bottom of the absorbing
apparatus recharged with gas. Therefore the same liquid is continnously setting
free in the heated tubes and reabsorbing in the absorbing apparatus the same gas.