Year: 1886

page_text: I FERDINAND WITTE Engineer of Berlin in the Kingdom of Prussia and German
Empire 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:-
In moulding in a vertical position and in casting of flange pipes, there are
difficulties, that there are not in casting socket pipes, the pattern of socket pipes -
can easily be rammed up by keeping the sides of proper thickness; but in moulding
of flange pipes, the ramming up of the flanges, requires the moulding box to be
larger inside than the outside of the flange pattern, the result is they require a
larger moulding box, a larger amount of loam which prevents the quick drying of
the mould, and makes the manipulation expensive, it also requires longer time, and
is more difficult to do, than my improved method, which is as follows;-The pipe
pattern has neither a top or bottom flange, and thereby the loam space can be
reduced, independently to the diameter of the flange to a minimum, further
advantages of this manipulation, are in preventing the following difficulties, when
the flange pipe is cast, they have to provide instantly for contraction, or the flange
will press with such force against the loam, as to break it off, to prevent this the
usual way at present is to open the box, and take out the pipe in a red hot state,
that is very troublesome at the time, but is not required by this manipulation, as
the pipe is allowed gently to cool, after a few little and slight alterations, and need
not be taken from the box until quite cool.
The way and the construction of the moulding box is described in Figs. 1 and 3.
The moulding box is made as usual in two halves, and is held in upon girders or
by a wall, and is held together with bolts:
DESCRIPTION OF DRAWINGS.
F is the moulding box in two halves and is held up on I shaped girders, and
bolted together by lugs p and bolts o. i is a top box in two halves, that is
fastened to main box F with bolts, and is divided the same way as the main box,
and is turned out on the inside, M is the pipe pattern, consisting of a plain cylinder
with a top lug r, and bottom taper lug 8. a is a floor plate, on which ring d is

page_text: fastened from the bottom, the floor plate a has a cylinder shaped step c that is the
diameter of the flange required, and a boss b, that forms the continuation from
flange to pipe body, the bottom edge of ring d projects to the inside, the bottom
plate and ring are fixed to the main box with split bolts and cotters.
m in Fig. 2 is a bottom with a hollow space R, and at the centre has a taper
recess n, to hold the core K, and to keep the same true in the middle.
w is a cover with a recess L, and is turned on the outside to fit true in i; the
way of moulding is as follows:-
The floor plate a, and ring d, remaining space is filled with loam, and the whole
is bolted to the main box F; the pattern M is then put in from the top, and is held
in its position by a plate that is fastened and kept true to box i; the box is then
filled half way up with loam S; the plate is then removed, and then rammed up
and space made for casting T. On lug there is fixed a ring with a template u
so as to form the bottom space h, for top flange, also space on gait side T, for
the cover, the pattern M, and gait iron T, are removed, the ring d, is then
temporarily fixed, the bottom plate a taken off, and the ring e, as well as all the
loam S, as produced, it is then dried and blackened; in taper hole n of the bottom
plate m, as shewn in Fig. 3, there is fixed a cylinder shaped print / same diameter
as the core of the main pipe k, and with the bottom taper and step fixed and
space R is filled with loam, the top is then made straight, with a straight edge
and print l, taken out, the whole is dried, (and then instead of bottom plate) a is
fixed under ring d, connected with split bolts and cotters to box F.
The top surface of the loam R form with space in ring e, the shape of the bottom
flange, the long pipe core is then-fixed and held at the top by cover w, also kept in
centre of mould, in space L, there is in the same way as at bottom m, loam rammed
up dried and blackened, the cover is fastened with bolts with the top box, the
bottom surface of the loam L will with the surface formed by turning the template
give the shape of top flange. The form is now ready for casting, after casting, the
cover w is taken off, and the spindle of the main core removed, the bottom plate m,
with ring d is taken off and the ring of loan is free and broken on, also the bolts o
slackened, when the casting is sufficiently cooled, the box is then opened and cast
taken out:
Having now particularly described and ascertained, the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
1: The moulding and casting of flange pipes in a vertical position as shewn and
described.
2. Producing moulds of flanges on pipes without flange patterns as shewn and
described.
3. Producing the bottom surface, for the form of top flange, by means of a lug
on the pattern, to fix the template, and produce the form of a flange as shewn
and described:
4. The use of the loam ringe which forms the bottom part of pipe, which forms
part of the flange b, which allows of the main box being smaller than the diameter
of flange required, and after casting, allows the casting to be freed quickly, so as to
allow the contraction in cooling, between the flanges.
Dated this eighth dose of Manah 1000.