Year: 1888

page_text: Date of Application, 24th Apr., 1888
Complete Specification Left, 24th Jan., 1889
Complete Specification Accepted, 30th Mar., 1889
We, CHARLES WELLS, of No. 53, Charlotte Street, Portland Place, in the County™
of Middlesex, Gentleman, and JAMES THOMAS PICKBURN, of No. 51, Downs Road,
Clapton, in the County of Middlesex, Gentleman, do hereby declare the nature of this-
invention to be as follows:-
In our invention we expand the air by heating it with gas, the combustion of which
is preferably performed with atmospheric burners.
The heating takes place in a vessel one end of which is heated externally and. the
other end kept cool, a displacer or frictionless piston transfers the air from.the.hot to.
the cool end, so as to obtain alternate expansion and contraction of the air.
To diminish the amount of heat necessary for obtaining a given pressure by
expansion, instead of using air at or nearly at the normal ambiant pressure, we⭑
compress it previously.
The advantage of the previous compression being the possibility of having.for a
given temperature a much greater pressure on the working pistons..
These pistons and their connection to the crank shaft are made in the usual manner,
but as the air acting on the pistons is cool or of moderate temperature, any packing,
even leather, may be used, thereby rendering the lubrication of the pistons.and
cylinders an easy inatter. We also use a pump.or other means of compressing the air:
previous to starting or for the purpose of making up for any losses by leakage, and.
the like.
1 1300

page_text: We, CHARLES WELLS, of No. 115, Great Titchfield Street, late of No. 53, Charlotte
Street, Portland Place, in the County of Middlesex, Gentleman, and JAMES THOMAS
PICKBURN, of No. 51, Downs Road, Clapton, also in the County of Middlesex,
Gentleman, do hereby declare the nature of this invention and in what, manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :---
مان
In our invention we expand the air by heating with gas, the combustion of which is
preferably performed with atmospheric burners.
The heating takes place in a vessel one end of which is heated externally and the
other end kept cool, a displacer or frictionless piston transfers the air from the hot to
the cool end, so as to obtain alternate expansion and contraction of the air.
To diminish the amount of heat necessary for obtaining a given pressure by
expansion, instead of using air at or nearly at the normal ambiant pressure, I compress
it previously.
The advantage of the previous compression being the possibility of having for a
given temperature a much greater pressure on the working pistons.
'
These pistons and their connection to the crank shaft are made in the usual manner
but as the air acting on the pistons is cool or of moderate temperature, any packing,
even leather, may be used, thereby rendering the lubrication of the pistons and
cylinders an easy matter. We also use a pump or other means of compressing the air
previous to starting or for the purpose of making up for any losses by leakage and
the like...
"
:
Referring to the accompanying sectional elevation which is to be taken as illustrative
only of the general features of this invention and not of a final and only method of
carrying our invention into effect.
A is the working piston connected in any convenient way with the crank shaft B.
CC are displacers worked with alternate. strokes from the crank shaft in the
air vessels..
The latter, of which there may be any number with their necessary accessories, are
heated at one end by gas burners D. É is a water tank adapted to keep the opposite
ends of the air vessels cool.
Fis the air pump, the connections with the air vessels, and g g' the connections
between the air vessels and the working cylinders A', by which connections the
respective bodies of heated air flow from the air vessels.into the said cylinder.
:

page_text: The displacer and piston cranks are preferably at equal angles with each other for
the purpose of securing regular action.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
1. The combination of gas heater, air vessel, air compressor, displacer, crank and
working cylinder, as set forth.