Year: 1887

page_text: A clerical error in the name of the Communicator of the original Specification
having been amended by the Patentee with the consent of the Comptroller, the
printed Specification will now read as shown below:-

page_text: [Communicated from abroad by EPOUSE BAIS-GOMBERT, of Brussels, in the Kingdom
of Belgium, Engraver.]
Improvements in the Manufacture of Sign Plates and the like.
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 to be as follows:-
The present invention consists in producing sign letter, number plates and the like
in metal with the letters and numbers in relief and with checkered or ornamented
background for the use of engine and machine builders-also for carriage wagon and
truck builders-for furniture or other industrial or private inscriptions. These plates
are produced in the following manner. On a metal plate a paper ornamented in relief
with any design is placed, onto this are placed the border and the letters or figures
representing the design or inscription to be reproduced. From this is taken a plaster
cast which is then dressed with finely powdered slate or lead ore to permit a plaster
cast in relief to be made from which the moulds are made with finely powdered clay.
Onto these moulds the molten metal is poured. When the cast is cold it is passed
through acid to clean it of all fatty or greasy matter and the background is painted
with any desired color mixed with varnish and alcohol which adhere well. To finish
the plate the relief is polished. If necessary the plaster cast may be omitted and the
mould made at once in the powdered clay but this method does not turn out such neat
and well finished castings.

page_text: 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 consists in producing sign-, letter-, number-plates and the like
in any metal or alloy with the letters and numbers in relief and with a checkered or
ornamented background either in relief or in intaglio, for the use of engine and
machine builders also for carriage-, waggon- and truck-builders for furniture or other
industrial or private inscriptions.
These plates can be either flat, convex or concave and are produced in the following
manner: On a metal plate a paper ornamented in relief or in intaglio with any design is
placed, onto this are placed the border and the letters or figures representing the design or
inscription to be reproduced. From this is taken a plaster cast which is then dressed
with finely powdered slate or lead ore to permit a model of the plate to be prepared
with plaster of Paris or other suitable material. By means of this model a suitable
number of moulds are forined in fine sand or equivalent into which the molten metal
is poured. When the cast is cold it is passed through acid to clean it of all fatty
or greasy matter and the back ground is then painted with any desired color which
will adhere well having been previously mixed with varnish and alcohol. To finish
the plate the relief is polished. Instead of painting the plate may be decorated by
being bronzed, nickeled, gilt, coppered or silvered or by other means.
Having now particularly described and ascertained the nature of the said invention
as communicated to me by my foreign_correspondent and in what manner the same
is to be performed 1 declare that what I claim is :-
1. The method of producing sign plates and the like consisting in forming the
moulds for the casting of such plates by the aid of a model obtained from a plaster

page_text: cast taken from a representation of the desired design made by placing checkered or
ornamented paper on a metal plate and placing the border and letters or figures
representing the design onto this paper substantially as specified.
2. A sign or equivalent plate in relief with checkered or otherwise ornamented
background made substantially as specified by the above described process.
3. A sign or equivalent plate in relief with checkered or otherwise ornamented back-
ground painted and varnished or otherwise decorated-as for example by bronzing,
nickelling, gilding or the like, in one or more colors and manufactured substantially
as specified by the above described process.