Improvements in Portable Forges.
Year: 1894

page_text: Date of Application, 6th Mar., 1894
Complete Specification Left, 5th Dec., 1894-Accepted, 5th Jan., 1895
PROVISIONAL SPECIFICATION.
Improvements in Portable Forges.
I, MARIE MÉHU, of 15 Rue Lafayette Saint Malo, in the Republic of France,
Manufacturer, do hereby declare the nature of this invention to be as follows :-
==
This invention has for its object an improved portable forge combined with a
fan, by which, first, the necessity, for the frequent cleaning required in such forges
as ordinarily made, is avoided, second, to allow the intensity of the air jets to be
varied or to cut them off completely by the use of moveable orifices to the tuyère,
such orifices consisting of one or more holes, or being replaced by a solid block by
which the air is cut off. Third, the delivery of a large volume of air by the fan
in proportion to its size.
The improved forge consists of four iron standards connected above by cross
stays. The upper part carries a horizontal plate preferably curved down at its
centre, in the centre of which is arranged the tuyère, and which is also
provided with vertical side guards, with a case for containing the gear for driving
the fan.
The fan which is arranged below is provided with a sufficient number of curved
or spiral blades, the convex surface of which meets the air as they revolve. It
is driven by hand by a belt actuated by a wheel driven by suitable gear in the case
above.
In the outer case of the fan is fitted an air passage communicating with the side
of the tuyère. The latter is formed of cast iron, and consists of two concentric
vertical cylinders, the upper ends of which are covered by a curved cover, open at
the centre above the inner cylinder. The outer cylinder receives the blast from
the fan, which drives back any ashes, which fall into the central cylinder, from
which they can be removed when necessary by means of a moveable cover which
closes the lower ends of both cylinders.
The delivery orifices for the air are contained in moveable interchangeable
blocks which fit and form the cover above the upper end of the space between the
two cylinders, and deliver the air laterally toward the centre of the forge.
They are held in place by wedges, and may have one or more orifices discharging
the air in the required direction, or one of them may be exchanged for a block of
the same shape but unperforated.
Dated the d. of Mauch 1004

page_text: COMPLETE SPECIFICATION.
Improvements in Portable Forges.
I, MARIE MEHU, of 15, Rue Lafayette, Saint Malo, in the Republic of France,
Manufacturer, 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, and accompanying drawing, that is to say :—
This invention has for its object an improved portable forge combined with a
fan, by which, first, the necessity. for the frequent cleaning required in such forges
as ordinarily made, is avoided; second, the intensity of the air jets can be varied
or they can be cut off completely by the use of suitable orifices to the tuyère,
such orifices consisting of one or more holes, or being replaced by a solid block by
which the air is cut off. Third, the delivery of a large volume of air by the fan
in proportion to its size is obtained.
The accompanying drawing is in illustration of my invention.
Figure 1 is a vertical section through the tuyère on the line C-D, Figure 3.
Figure 2 is a horizontal section on the line A-B, Figure 1.
Figure 3 is a plan of the tuyère.
Figure 4 is a front view of one of the moveable orifices.
Figure 5 shews the multiplying gear used for driving the fan.
Figure 6 is a vertical section through the fan.
Figure 7 is a side view, partly in section, of the forge and tuyère.
Figure 8 is a vertical section at right angles to Figure 7.
The improved forge consists of four iron standards connected above by cross
stays. The upper part carries a horizontal plate C1, C2, preferably curved down,
in the centre of which is arranged the tuyère T, and which is also provided with
vertical side guards or fenders G, and with a case E, (Figures 7 and 8), containing
the gear for driving the fan.
The fan V which is arranged below is provided with a sufficient number of
curved or spiral blades, the convex surface of which meets the air as they revolve.
It is driven by hand by a belt c passing round a pinion d, and actuated by a wheel
driven by a pulley or fly wheel V', actuated by toothed gear contained in the case
above, and driven by the handle e.
In the outer case of the fan is fitted an air passage B¹ communicating with the
side of the tuyère T. The latter is formed of cast iron, and consists of two
concentric vertical cylinders, H, H', the upper ends of which are covered by_a
curved cover, open at the centre above the inner cylinder. The outer cylinder H,
of the full diameter of the tuyère, receives the blast from the fan through the
pipe F, which drives back any ashes which fall into the central cylinder H³, from
which they can be removed when necessary by means of a moveable cover which
closes the lower ends of both cylinders.
The delivery orifices O for the air from the openings K, are contained in
moveable interchangeable blocks which fit and form the cover above the upper
end of the space between the two cylinders, and deliver the air laterally toward.
the centre of the forge.
They are held in place against lugs L, by wedges N, and may have one or more
orifices discharging the air in the required direction, or one of them may be
exchanged for a block of the same shape but unperforated.
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 improved portable forge with fan and tuyère, consisting of :-
1. The toothed gear, pullies, and handle, actuating a fan having curved blades,
substantially as described and illustrated.

page_text: 2. The tuyère formed of two concentric cylinders, communicating with the
delivery pipe from the fan, and having discharge passages for the air in its upper
part, substantially as described and illustrated.
3. The moveable and interchangeable blocks having orifices communicating
with the said discharge passages, and held in position by wedges, substantially as
described and illustrated.
4. The frame, curved top, and guard plates, substantially as described and
illustrated.
Dated this 5th day of December 1894.
is 5th day of December 1894.
EDWARDS & Co.,
65 and 66, Chancery Lane, London, Agents for the Applicant.
EDWARDS & Co.,
65 and 66, Chancery Lane, London, Agents for the Applicant.