Improvements in the Manufacture of Articles in Cast Metal with a Covering of other Metal.
Year: 1889

page_text: Date of Application, 11th June, 1889-Accepted, 27th July, 1889
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Articles in Cast Metal with a
Covering of other Metal.
A communication from JEAN MARIE DURAFORT, and VICTOR ERNEST JULES
DURAFORT, of 162, Boulevard Voltaire, Paris, in the Republic of France,
Manufacturers.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex, M.I.M.E.
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 present invention relates to improvements in the manufacture of articles in cast
metal and its object is to cover all articles cast in moulds with an envelope of hard
or costly metal such as copper, German silver, nickel, silver and the like and to
give them the solidity and the lustre and appearance of these metals, instead of
simply to nickel or silver them which does not give them much solidity and is of short
duration.
These metal envelopes are formed exactly in the shape and form of the articles they
are destined to cover and may be in one or more pieces.
These envelopes after having been prepared and cleaned are fitted and fastened
together if prepared in several pieces and are then placed into suitable moulds into
which is then cast the molten metal with which it is desired to fill the envelope.
For the manufacture of the envelopes metal plates or rolled metal may be
employed.
If it is desired for instance to manufacture a valve for a siphon bottle according to
the present invention, an envelope in one or more pieces is first constructed having
the form of this valve, these pieces are then placed into a mould into which is cast the
molten metal to obtain the completo article with its interior and exterior screw
threads.
In the accompanying drawings ;-
Fig. 1 represents in plan and in vertical section the envelope A which when filled
in with metal and provided with an interior screw thread by means of a mould forms
the screw cap B represented in vertical section and plan in fig. 2. ready to be screwed
onto the neck F of the siphon valve. Fig. 3 represents the envelope D filled in with
metal C to form the handle of the siphon lever. Fig. 4 represents a vertical section
of the whole siphon valve.
Fig. 5 represents in section and plan the envelope E destined to cover the neck F
of the valve.
Fig. 6 represents in section the envelope J of the outlet tube.
Fig. 7 represents in section and plan the envelope of the body I of the valve, which
is screwed on the siphon bottle.
The parts EJ H are fitted together before the metal is cast in.
Figs. 8 and 9 are details of the screw ring L K which is fitted on the neck of the
siphon bottle and onto which is screwed the before mentioned siphon valve.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed as communicated to me
by my foreign correspondents, I declare that what I claim is ;—
The method of manufacturing cast metal articles with an envelope of hard or
costly metal consisting in constructing the envelope first and then placing it in a
mould in which is then cast the metal which is destined to form the article, the
envelope being either in one or more pieces according to the form of the article,

page_text: and the interior and exterior screw-threads necessary for the mounting of the
article if such is required being formed in the casting substantially as described
and illustrated in the accompanying drawings.
W. P. THOMPSON & BOULT,
Agents.