Improved Process for Heating the Air Supply of Hot Air Engines...
Year: 1897

page_text: Date of Application, 8th Jan., 1897-Accepted, 20th Feb., 1897
COMPLETE SPECIFICATION.
Improved Process for Heating the Air Supply of Hot Air Engines...
I, HERMANN BECKER of No. 83 Blumenstrasse, Altona, in the German
Empire, Engineer, 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:—
The present invention relates to an improved process for heating the air supply-
of hot air engines, and consists in using the exhaust steam from the steam engine
which drives the air pump for pumping the necessary air, to heat the air delivered.
by the said pump. This heating is effected by allowing the exhaust steam to act
upon the air contained in the air chamber, pumped thereinto, by the said air pump.
At the same time the exhaust steam, after having heated the air, is used to jacket
the hot air cylinder of the hot air engine against cooling. The heating of the air-
chamber before starting the engine, is effected by live steam.
The accompanying figure is a diagrammatic sectional elevation and is to be.
taken as part of this specification and read therewith.
The invention consists broadly of the boiler a, the steam engine b with the air
pump, the air chamber for receiving the air supplied by the air pump, and the
hot air engine e.
The boiler a is connected by a pipe f, controlled by a cock, to the steam engine b,.
and by a pipe g also controlled by a cock, to the air container d. The latter is
surrounded by an external sbell h which with the shell i of the chamber d forms
the intermediate chamber k. The latter is completely isolated from the-
chamber d.
A gridiron pipe m is fixed within the chamber d. It starts near the bottom of
the shell and is continued outwards through the said shell and that, h, of the
chamber k, terminating in the jacket n of the cylinder of the hot air engine e.
The air from the air pump e is led into the chamber 1 by a pipe o and the heated
The pipe g
air is led by a pipe 9 to the valve chest of the hot air engine e.
delivers into the chamber k; as does also the exhaust steam pipe p from the
engine b.
The invention works in the following manner.
After the air chamber k has been warmed by live steam from the boiler a fed.
into the said chamber by the pipe g, the pump c fills the chamber with air. At.
euters the chamber k and from
the same time, the exhaust steam from the engine
there is led by the gridiron pipe m through the chamber to the jacket n of the
cylinder of the hot air engine. The air in the chamber for driving the hot air
It is obvious that other steam
engine, is heated sufficiently by the exhaust steam.
may be used to heat the air, if necessary.
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 hereinbefore described process for heating the air supply of hot air
engines, in which the exhaust steam from the steam engine driving the air pump,.
is used to heat the said supply and also after such use, to warm the hot air engine.
cylinder, there being also provision for heating the air chamber by live steam.

page_text: 2. The combination of air chamber, intermediate chamber surrounding it,
gridiron pipe within the air chamber establishing a communication between the
said intermediate chamber and the jacket of the hot air engine cylinder, and a pipe
connection between the same chamber and the steam exhaust and steam boiler
respectively, as and for the purpose set forth.
Dated this 8th day of January 1897.
PHILLIPS & LEIGH,
No. 22 Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.