IMPROVED MEANS OF OBTAINING MOTIVE POWER THROUGH AN ATMO- SPHERIC ENGINE, BY FACILITATING THE ATTAINMENT OF EXHAUSTION BY CURRENTS OF CALORIC, THE ENGINE BEING WORKED BY THE PRESSURE OF THE ATMOSPHERE
Year: 1852

page_text: PROVISIONAL SPECIFICATION left by George Jenkins at the
Office of the Commissioners of Patents, with his Petition, on the
1st October 1852.
(Void by reason of notice to proceed not having been given within the
time prescribed by the Act.) "
I, GEORGE JENKINS, of Nassau Street, Soho, in the County of Mid-
dlesex, Gentleman, do hereby declare the nature of the said Invention
for IMPROVED MEANS OF OBTAINING MOTIVE POWER THROUGH AN ATMO-
SPHERIC ENGINE, BY FACILITATING THE ATTAINMENT OF EXHAUSTION BY
CURRENTS OF CALORIC, THE ENGINE BEING WORKED BY THE PRESSURE OF
THE ATMOSPHERE," to be as follows:-
To obtain power I propose to construct a close stove or furnace A, A,
Fig. 1, in the accompanying Drawing, and pass through this stove or
furnace a large air vessel B, having contracted ends or necks open at
top and bottom, and free to the atmosphere. In this large vessel the
air in its passage through is intended to be heated very considerably by
the furnace, and as it issues out at top to produce a rapid current
through pipes c, c, c, which are connected with an exhausting appara-
tus, as will be shewn. This exhausting apparatus has a communication

page_text: by means of a lateral pipe d, with the box E, on the top of the stove,
which is connected with the eduction from the working cylinder, and
through this box E, I carry up tubes c, c, c, formed as inverted cones
(or they might be cylindrical), and perforate the sides of these tubes
with small holes, so as to allow the eduction air to be drawn through
these perforations by the current of heated air passing through the
tubes c, c, c, from the large heated air vessel. This means of ex-
haustion is to be applied to the working of a piston in a cylinder to be
acted upon by the pressure of the. atmosphere. In carrying out this
Invention I construct a cylinder H, and piston I, near to my furnace,
and form in the usual way channels for the air and for the exhaustion
from the cylinder, to be opened and closed by a slide valve in any
ordinary or convenient manner. The pipe d, through which the
eduction air is drawn from the working cylinder, I propose to pass into
a large vessel F, for the purpose of reserving and equalizing the state
of exhaustion, and to draw from thence the eduction air through the
lateral pipe d, before mentioned into the box E, at the top of the
furnace, but this large vessel F, may be dispensed with, and the.educ-
tion .carried immediately from the working cylinder H, to the box E.
It will now be perceived that by the continued exhaustion of the
eduction air in the vessel F, and pipe d, produced by the currents of
heated air from B, through the conical tubes c, c, c, the atmospheric
pressure alternately above and below the piston will be enabled to pro-
duce the reciprocating action of the piston I, in the cylinder H, as in
other atmospheric engines, but with very considerably increased effect.
By connecting the-piston rod g, to a beam.J,,I have the ordinary
means of communicating the power of the reciprocating piston to the
working of other machinery. In order to obtain an increased supply
of air to the vessel B, I sometimes apply a blowing apparatus as at K,
which may be worked by. a. rod k, connected to the beam J, of the
engine, and conduct the air to the bottom of the vessel .B, by a pipe 1,
and I can also increase the effect. of the current and further promote
the exhaustionsby introducing a small. jet, of water from a tank through
apipe m, to the lower part of the vessel B.. which by the heat in the
vessel will be siminediately. converted into steam, and rush through the

page_text: passages at top. I also confine the heat evolved at top of the furnace
by a case or jacket L, L, surrounding the box E, and pipes c, c, c,
which will facilitate the draft of air. The large air vessel B, above
described may be placed in a bath of boiling water or other fluid, or
high pressure steam, and the air heated thereby in its passage.