Improvements in Smiths' Forges.
Year: 1897

page_text: Date of Application, 29th Nov., 1897-Accepted, 12th Mar.,
1898
COMPLETE SPECIFICATION.
Improvements in Smiths' Forges.
I, SOPHI HEILMANN, Muhlau, Leipzig, in the Empire of Germany, Quarry
Owner, 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 object of the present invention is to secure a broadening or expansion of
the air current or blast at the point where it issues from the bellows, and the
escape outwards of the gases which may enter the bellows from the hearth, so that
these gases may not force themselves into the interior of the bellows. Another
object which is effected by the invention is the prevention of any escape of air
through the bellows cover or casing by reason of the spasmodic action a steady
even current of air or blast being thus produced. The apparatus also secures such
a favourable directing or guiding of the aircurrent or blast as will produce a good
flame and promote combustion.
I will now describe the invention with reference to the accompanying drawings
in which:
Fig. 1 shews a longitudinal vertical section of the apparatus.
Fig. 2 shews a plan view, the cap e being removed.
Fig. 3 shews a view of the cap from below.
The blast tube a is attached to the vertical tube b, both tubes being usually
cast in one piece as shewn in the drawing. The upper part of the tube b carries
additional or projecting pieces e, below which are segmental flanges d serving for
the support and fastening of the nozzle cap or cover c. The tube 6 has underneath
a closing cap f, which serves for removing ashes, dirt and the like that force
themselves into the nozzle when the air valve is opened. By means of this valve
also all metallic substances having a lower smelting temperature than that of
iron are interrupted. The upper part of the tube 6 is surrounded by a casing g,
the two parts of which are joined together by means of screws.
The semi-circular cap c is furnished with an inwardly projecting flange r, this
latter being provided with two recesses for the reception of the projecting lugs e
which fit into the recesses so that when rotated the cap is firmly held. The cap
is furnished above with cross or star shape apertures through which the air
current or blast is evenly distributed. In the middle of the cap a core or plug k
is placed in order that the apertures o may not be enlarged by the pressure of
dross or wet. Between the inner edge of the flange r and the tube b is a small
free space, which is provided for the purpose of facilitating the escape into the
open air through the holes s of the gases entering the cap c from the fire and
passing on to the case or covering 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:
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page_text: surrounded by the casing g, the tube b being attached to the blast tube a, and the
lower part of the said tube b being furnished with a sliding or closing plate f, and
its upper end being connected by means of a bayonet joint, with the nozzle cap c
out of which the air current passes by means of radial slots o, space being left
between the inner edge of the Hanger and outer circumference of tube b when the
nozzle cap is in place, so that any gases can escape into and through the casing g,
as herein described and set forth.
Dated this 27th day of November 1897
S. S. BROMHEAD,
Patent Agent, 171, Queen Victoria Street, London, E.C.