IMPROVEMENTS IN OBTAINING MOTIVE-POWER, AND IN APPARATUS: FOR THE SAME
Year: 1860

page_text: PROVISIONAL SPECIFICATION left by Jean Baptiste Pascal at the Office of
the Commissioners of Patents, with his Petition, on the 4th June
1860.
I, JEAN BAPTISTE PASCAL, of 29, Boulevart St. Martin, Paris, in the
Empire of France, Civil Engineer, do hereby declare the nature of the-said:
Invention for "IMPROVEMENTS IN OBTAINING MOTIVE-POWER, AND IN APPARATUS:
FOR THE SAME," to be as follows:-
My Invention relates to an arrangement of generator which alternately
produces and condenses the steam, and also to an engine for receiving the
inotive-power of such steam. This apparatus is divided into two parts, viz.,
Ist, the generator, and 2ndly, the engine. The principle of action of the
generator is as follows:- I produce steam at a pressure of one or several
atmospheres by alternately generating & condensing steam produced from
water or other liquid held in suspension in capillary chambers formed by sheets
of wire cloth, kept constantly cooled; from thence I eject this water by.
means of atmospheric air or other fluid, gas, or vapour, by which it may be
mechanically transported in the form of liquid particles into other capil
lary chambers which are kept constantly heated, where it becomes vapourized.
The steam thus generated expands under the piston of the steam engine, &
when it has performed its functions it returns into the generator, where it
becomes condensed by cooling in the same capillary chambers from which it.
had formerly been ejected in the form of water.

page_text: This return movement of the steam into the generator is effected by means
of the same mechanical arrangements as above mentioned.
In my machines I can, 1st, make use of compressed air from a blowing
machine for driving the water through the sheets of wire cloth or other material;
2ndly, I can also effect the condensation of the steam at a higher pressure than
that of the atmosphere, so as to be able, if requisite, to make use of water
heated to boiling point for refrigerating purposes; 3rdly, I also claim the
peculiar arrangements or modifications of my method of alternately producing
& condensing steam by means of sheets of wire cloth or other metallic sub-
stances, one part of which is kept constantly heated, and the other constantly
cooled, and which are applicable for the purpose.
These peculiar arrangements may be varied in an infinite variety of ways,
either by effecting the displacement of the air in the apparatus containing the
wire cloth, or in a separate apparatus. Also by varying the method of heating
and cooling these apparatus, accordingly as they are placed vertically, horizon-
tally, or in an inclined position, either by reheating the metal cloths by contact
with surfaces heated directly by means of a furnace, or by means of steam
which has acted on the piston and which is reheated before being passed
through the wire cloths. Also by employing atmospheric or compressed air
for driving the water, either by means of a ram or air-tight piston, or by em-
ploying air from a blowing machine.
I also employ in these machines for low pressures air only, or air slightly
saturated with steam; further, I make use of these machines for producing
high pressures & generating as much steam as possible.