Improvements in Hot Air Engines Heated by Gas.
Year: 1889

page_text: Date of Application, 17th Aug, 1889
Complete Specification Left, 17th Apr., 1890-Accepted, 10th May, 1890
PROVISIONAL SPECIFICATION.
Improvements in Hot Air Engines Heated by Gas.
1, CHARLES WELLS, of No. 115, Great Titchfield Street, in the County of
Middlesex, Gentleman, do hereby declare the nature of this invention to be as
follows:
:-
My invention relates to hot air engines in which the air contained in a vessel,
provided with a displacer, is heated by atmospheric burners consuming gas, and the
more effectual and rapid heating of the air and a more complete displacing of the
same is obtained.
To attain this purpose the stroke of the displacer is made smaller than that of the
crank, lever, or eccentrics moving it thus causing the displacer to come in contact
with the cold and hot end plates of the vessel which check it in its movement.
Springs are provided at some part of the rods levers or eccentrics to prevent
breakage and to allow the stroke of same to be completed when the displacer in
checked.
The advantages claimed by this construction are:
The displacer accomplishes its stroke in a smaller portion than half the revolution of
the shaft, thereby giving the air more time to be heated and cooled.
.'
The displacement of the air from hot to cold end, is more complete, as the displacer
requires no clearance space.
The displacer gets heated and cooled when in contact with the hot and cold
surfaces, therefore rendering the heating and cooling of the air more rapid as the
end surface of the displacer adds itself to the surfaces of the hot and cold surfaces of
the ends of the vessel.
Datolithic of Muut 1880
PHILLIPS & LEIGH,
Agents for, the Applicant.
COMPLETE SPECIFICATION.
Improvements in Hot Air Engines Heated by Gas.
1, CHARLES WELLS, of No. 115, Great Titchfield Street, in the County of
Middlesex, Gentleman, do bereby 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 :-
My invention relates to hot air engines, in which the air contained in a vessel,
provided with a displacer is heated by atmospheric burners consuming gas, and the
more effectual and rapid heating of the air and a more complete displacing of the
same is obtained.
To attain this purpose the stroke of the displacer is smaller than that of the
crank, lever, or eccentrices moving it, thus causing the displacer to come in contact
with the cold and hot end plates of the vessel, which check it in its movement.
Springs are provided at some part of the rods, levers, or eccentrices to prevent
breakage and to allow the stroke of same to be completed when the displacer is
checked.
The advantages claimed by this construction are:-
The displacer accomplishes its stroke in a smaller portion than half the revolution of
the shaft, thereby giving the air more time to be heated and cooled.
The displacement of the air from hot to cold end, is more complete, as the displacor
requires no clearance space.

page_text: The displacer gets heated and cooled when in contact with the hot and cold surfaces,
therefore rendering the heating and cooling of the air more rapid as the end surface
of the displacer adds itself to the surfaces of the hot and cold surfaces of the ends of
the vessel.
In order that my invention and the means by which the same is to be carried into
practical effect may be thoroughly understood, I will now describe them in detail
referring in so doing to the accompanying drawing which is to be taken as part of this
specification and read therewith.
A. Vessel containing the air which is to be heated and cooled..
B. Atmospheric burner heating the air in A.
C. Water cooling the air in vessel A.
D. Displacer composed of sheet iron and asbestos, or other suitable materials.
It is simply a loose piston which moves the air from the hot to the cold part of the
vessel A.
E. Rod of the displacer.
F. Fork or sling connecting the rod E to the crank G.
H. H. Collars fixed on the rod E.
I. Loose T piece, which lifts the displacer when the spring is sufficiently com
pressed by the movement of the fork F.
J. Cylinder and piston, from which motion is imparted to the crank shaft G.
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 :-
The combination with cylinder piston crank and displacer of displacer connect-
ing rod as the latter is hereinbefore described with reference to the accompanying
drawing.
Dated this 17th day of April 1800
PHILLIPS & LEIGH,
22, Southampton Buildings, Chancery Lane, W.C., Agents for the Applicant.