A Method of Moulding Articles in Cement or other Semifluid Setting Material.
Year: 1887

page_text: PROVISIONAL SPECIFICATION.
A Method of Moulding Articles in Cement or other Semifluid
Setting Material.
1, JAMES HENRY GREATHEAD of No. 8 Victoria Chambers, Westminster in the
County of Middlesex, Engineer do hereby declare the nature of this invention to be.
as follows:-
My invention relates to the moulding of articles in cement or other semifluid
material that will set into the form of the mould, the object which I have in view
being to obtain perfect and sharp casts, and also to effect casts in situ as for
instance on walls, ceilings cornices or such places and to furnish a protective
preservative or ornamental coating for iron girders or other parts of structure. For
this purpose I prepare or place the semifluid material in a vessel which can be
closed air tight and which is provided with an agitator and I connect this vessel by
a tube which may be flexible, with the mould or space into which the inaterial is to be
cast. I admit to the vessel compressed air or steam or other fluid under pressure to
press upon the semifluid material while it is agitated causing it to flow under pressure
into the mould or space.
In this manner, by fixing a mould against a wall or ceiling or against or around a
girder column or other part of structure I can inject the semifluid material so as to
form a protective or preservative coating which being allowed to set before removal of
the mould will adhere to the wall or other surface or surround the part to which it is
applied and which externally may present moulding or other decorations, according to
the pattern of inould employed.
In cases where hydraulic pressure is employed to act on the semifluid material,
I provide in the pressure vessel a piston or floating diaphragm to separate the water
from the moulding material.
A
2
ABEL & IMRAY,
Agents for the Applicant.

page_text: CUBT LEID DE MULTICATION.
A Method of Moulding Articles in Cement or other Semi Fluid
Setting Material.
I, JAMES HENRY GREATHEAD of. No. 8 Victoria Chambers, Westminster in the
County of Middlesex, 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:- .. ..
.
My invention relates to the moulding of articles in cement or other semifluid
material that will set into the form of the mould, the object which I have in view
being to obtain perfect and sharp casts, and also to effect casts in situ, as for instance
on walls, ceilings, cornices, or such places and to furnish a protective, preservative or
ornamental coating for iron girders or other parts of structure. For this purpose,
prepare or place the semifluid material in a vessel which can be closed air tight and
which is provided with an agitator and.I connect this vessel by a tube which may be
flexible, with the mould or space into which the material is to be cast I admit to the
vessel compressed. air or steam or other fluid under pressure to press upon the
semifluid material while it is agitated, causing it to flow under. pressure into
the mould or space.
In this manner, by fixing a mould against a wall or ceiling or against or around a
girder, column or other part of structure, 1 can inject the semifluid material so as to
form a protective or preservative coating which, being allowed to set before removal
of the mould, will adhere to the wall or other surface or surround the part to which it
is applied, and which externally may present mouldings or other decorations according
to the pattern of mould employed.
In cases where hydraulic pressure is employed to act on the semifluid material,
I provide in the pressure vessel a piston or floating diaphragm to separate the water
from the moulding material.
Fig. 1 of the accompanying drawings is a longitudinal section of the vessel
containing the semifluid cement or other material. It is provided with an agitator A,.
a pipe and valve B by which the material passes to the mould when forced out of the
vessel by the pressure of compressed air admitted by opening the valve C: Figs. 2, 3,
4, 5 and 6 illustrate various applications of the invention. Fig. 2 shews how a
girder D may be cased with cement forced in between it and a mould M made in
halves bolted together. Fig. 3 illustrates the application of a moulded ornament to a
ceiling E, the mould M being pressed against the ceiling by props F from below, with
packings G round its edges to prevent escape of the cement which is forced into the
imould. The packings G may be of elastic or yielding material, or they may consist
of portions of the cement first forced into channels formed in the mould and allowed
to set before the body of the mould is filled. Fig. 4 illustrates in vertical and
horizontal. section how a wooden column H may be enclosed in cement forced in
between it and the mould M, which is made in parts held together by clamping rings.

page_text: Fig. 5 illustrates the casing of an iron column K in a similar way. Fig. 6 illustrates
the formation of a floor by casing with cement a number of girders L, the cement
being forced between two moulds M which are bolted together at the required distance
apart and are removed when the cement has set.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
The herein described method of moulding articles in cement or other semifluid
setting material by applying fluid pressure to force the material from a vessel in
which it is mixed into a mould held firmly in position and removing the mould
after the material has set.
ABEL & IMRAY,
Agents for the Applicant.