IMPROVEMENTS IN CASTING METAL GRATINGS FOR PAVEMENT LIGHTS AND FOR OTHER PURPOSES
Year: 1874

page_text: LETTERS PATENT to William Robert Evans, of No. 48, Offord Road,
Caledonian Road, in the County of Middlesex, for the Invention of
"IMPROVEMENTS IN CASTING METAL GRATINGS FOR PAVEMENT LIGHTS AND
FOR OTHER PURPOSES."
PROVISIONAL SPECIFICATION left by the said William Robert Evans
at the Office of the Commissioners of Patents, with his Petition,
on the 2nd October 1874.
I, WILLIAM ROBERT EVANS, of No. 48, Offord Road, Caledonian
Road, in the County of Middlesex, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN CASTING METAL GRATINGS FOR PAVEMENT
LIGHTS AND FOR OTHER PURPOSES," to be as follows:-
This Invention has for its object improvements in casting metal
gratings for pavement lights and for other purposes.

page_text: core is provided with a head of hexagon, square, or other form. These
cores are arranged on a bed of sand with their heads touching on all
sides, and making as it were a complete pavement. This surface is then
covered with sand, and sufficient weight having been put on to prevent
the cores floating, molten metal is run in between them into the spaces
left below their heads.
If desired the cores may be made to fit the one to the other at the
bottom as well as at the top. This system of casting gratings gives
great facility for producing undercut forms and ornaments which could
not be moulded from a pattern in the ordinary way.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Robert Evans in the Great Seal Patent
Office on the 2nd April 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
ROBERT EVANS, of No. 48, Offord Road, Caledonian Road, in the
County of Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Second day of October, in the year of
our Lord One thousand eight hundred and seventy-four, in the thirty-
eighth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said William Robert Evans, Her special license
that I, the said William Robert Evans, my executors, administrators, and
assigns, or such others as I, the said William Robert Evans, my execu-
tors, administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS
IN CASTING METAL GRATINGS FOR PAVEMENT LIGHTS AND FOR OTHER PURPOSES,"
upon the condition (amongst others) that I, the said William Robert
Evans, my executors or administrators, by an instrument in writing
under my, or their, or one of their hands and seals, should particularly
describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed, and cause the same to be filed in

page_text: the Great Seal Patent Office within six calendar months next and imme..
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Robert Evans, do hereby
declare the nature of the said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement thereof, that is to say :-
This Invention has for its object improvements in casting metal
gratings for pavement lights and for other purposes.
By means of a core box or boxes I mould a number of cores corre-
sponding in form with the required openings in the grating, and in
addition each core is provided with a head of hexagon, square, or other
form or combination of forms. These cores are arranged on a bed of-
sand or metal or other material with their heads touching on all sides,
and making as it were a complete pavement. This surface is then
covered with sand, and sufficient weight having been put on to prevent
the cores floating molten metal is run in between them into the spaces
left below their heads.
If desired the cores may be made to fit the one to the other at the
bottom as well as at the top. This system of casting gratings gives
great facility for producing undercut forms and ornaments which could
not be moulded from a pattern in the ordinary way.
In order that my Invention may be fully understood and readily
carried into effect, I have shewn in the Drawings hereunto annexed
cores suitable for being used in the manner above described for casting
gratings having in them hexagonal spaces, in which are to be received
corresponding blocks of glass so as to form a pavement light.
Figure 1 shows a side view and part section of some of the cores;
Figure 2 shows a plan view of the same, also partly in section.
Figures 3 and 4 show views on a smaller scale of part of one form of
pavement light which may be cast by the use of cores formed as shown
at Figures 1 and 2. The forms of such pavement lights may however
be greatly varied. The heads also of the several cores in place of being
hexagonal may be square or of other form, or cores of one form may be
used together with cores of other form.
Each of the cores A, A, shown in the Drawings is moulded separately
in a box capable of being separated on the line x, y, Figure 2, and such

page_text: cores are afterwards dried, and when dry a number of them are placed
together upon a bed of sand, metal, or other suitable material with their
heads at top and bottom in contact with one another, as shewn at
Figure 1.
Around the assemblage of cores are also placed moulds or cores 5
suitable for producing the outer parts of the grating which is to form
the pavement light. The heads of the several cores thus placed together
to form a mould are then covered with sand and weighted to prevent
them rising, and the mould is filled with metal.
Metal gratings for other purposes may also, as before stated, be cast 1
in moulds built up of a number of cores in the manner above de-
scribed.
Having thus described the nature of my Invention and the manner of
performing the same, I would have it understood that I claim, casting
metal gratings for pavement lights and for other purposes by the means 1
substantially as herein described.
In witness whereof, I, the said William Robert Evans, have here-
unto set my hand and seal, this First day of April, in the
year of our Lord One thousand eight hundred and seventy-
five.
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