IMPROVEMENTS IN BELLOWS AND BLAST ENGINES
Year: 1874

page_text: PROVISIONAL SPECIFICATION left by William Edward Gedge at the
Office of the Commissioners of Patents, with his Petition, on the
8th September 1874.-A communication from abroad by Auguste
François Sorieul, of No. 64, Faubourg St. Martin, Paris, France.
I, WILLIAM EDWARD GEDGE, of No. 11, Wellington Street, Strand,
in the County of Middlesex, Patent Agent, do hereby declare the nature
of the said Invention for "IMPROVEMENTS IN BELLOWS AND BLAST ENGINES,"
a communication to me from abroad by Auguste François Sorieul, of
No. 64, Faubourg St. Martin, Paris, France, to be as follows:-
The present manufacture of bellows has certain imperfections; con-
siderable motive power is required to work them; the material of which
they are composed is somewhat costly; further, they do not work with
regularity, and the workmen are exposed to danger from explosions.
The bellows or blast engine the subject of this Invention is illus-
trated on the accompanying Sheet of Drawing, and presents..the
following modifications:-
.
In the first place it costs very much less than ordinary bellows; is

page_text: It is preferred to use wood so arranged that a special packing ensures
a perfectly hermetic closing while the pistons are working.
Motion is given to these pistons by the most simple and powerful
mechanical means, that is to say, by cranks or eccentrics.
These bellows are composed of two, three, or more rectangular cases
or chambers of wood or of metal. In each of these chambers plays a
piston sliding downwards without friction. Vertical guides ensure the
horizontal working of this piston.
The movement of these pistons and the action they produce is precisely
the same as in a. pump with several chambers, that is to say, that in
order to obtain a regular blast the working of the pistons is so arranged
that there is no intermittence in their action.
The great merit of this Invention lies in the packing of the pistons,
for it will be readily understood that it would be impossible to secure a
perfectly air-tight working of the pistons without this packing.
Fig. 1 is an elevation of a bellows embodying this Invention;
Figure 2 illustrates this packing.
It is composed of a band of leather and a band of india-rubber super-
posed and both fixed on the edges of the piston. The leather band a is
that which bears the frictions against the sides of the case or chamber,
which frictions may be easily lessened by a slight lubrication of these
sides. As to the india-rubber band bits mission is to produce by its
elasticity a pressure upon the leathern band in order to compel this latter
to constantly adhere against the sides of the case or chamber whatever
inequalities they may present.
This packing which may be applied above and under the piston, may
also if it isdesired to be used in a metal pump chamber be arranged as
shown Figure 3.
The india-rubber band 6 only is fixed to the piston, while a band of
leather of no great thickness is itself fixed to this band of india-rubber
in such a way that the leather alone will rub against the sides of
the pump chamber by reason of the elasticity of the india-rubber which
will have a tendency to push it constantly against these sides.
1

page_text: When several pistons are worked, three for example, it is proposed to
use a crank.shaft as at Figure 4, the shaft being so cranked that the
return of each of the pistones will cause no intermittence in the produc-
tion of the wind.
When several pistons are worked, three for example, it is proposed to
use a crank.shaft as at Figure 4, the shaft being so cranked that the
return of each of the pistones will cause no intermittence in the produc-
tion of the wind.
To sum up. This Invention comprises,-
-
1°. The method of construction, which permit the use of wood or of
metal, the ordinary leather being suppressed.
'