IMPROVEMENTS IN AND IN CONNECTION WITH MOULDS AND FRAMES FOR GIVING FORM TO CONCRETE BLOCKS AND STRUCTURES
Year: 1877

page_text: LETTERS PATENT to John Carrington Sellars, of Birkenhead, in the County of
Chester, Manufacturing Chemist, for the Invention of "IMPROVEMENTS IN
AND IN CONNECTION WITH MOULDS AND FRAMES FOR GIVING FORM TO
CONCRETE BLOCKS AND STRUCTURES."
Sealed the 6th October 1877, and dated the 9th April 1877.
PROVISIONAL SPECIFICATION loft by the said John Carrington Sellars at
the Office of the Commissioners of Patents on the 9th April 1877.
JOHN CARRINGTON SELLARS, of Birkenhead, in the County of Chester, Manu-
facturing Chemist. "IMPROVEMENTS IN AND IN CONNECTION WITH MOULDS AND
FRAMES FOR GIVING FORM TO CONCRETE BLOCKS AND STRUCTURES."
This Invention relates to moulds and frames to be used in the formation of
concrete blocks and structures, and has for its object to ensure that the concrete
shall not adhere to the surfaces of such moulds or frames, and hence the surfaces
shall present a smooth, neat, and finished appearance.
Under the first part of my Invention I make the moulds of paraffine or similar
wax-like substance, unacted upon by alkaline matter, mixed with sand, charcoal, or
other finely divided material. In some cases paraffine alone may be used. These
moulds are suitable for forming ornamental blocks, or blocks of various patterns
used in building operations, of which a large number is not required. If it is
desired to obtain a very smooth surface a stream of hot air or steam may be passed
over the surface of the mould before the concrete is filled in.
Under the second part I form moulds or frames of timber, metal, or rigid material,
the surfaces of which are coated with paraffine or other wax-like substance, either
with or without admixture with sand, charcoal, or other finely divided material.
Under the third part I form the mould of a rigid material, and cover the surfaces
with lac, mastic, or other varnish.
Under the fourth part I form the moulds of metal, and japan or enamel the
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Carrington Sellars in the Great Seal Patent Office on the 9th
October 1877.
JOHN CARRINGTON SELLARS, of Birkenhead, in the County of Chester, Manu-
facturing Chemist. "IMPROVEMENTS IN AND IN CONNECTION WITH MOULDS AND
FRAMES FOR GIVING FORM TO CONCRETE BLOCKS AND STRUCTURES."
This Invention relates to moulds and frames to be used in the formation of
Daina 71

page_text: concrete blocks and structures, and has for its object to ensure that the concrete shall
not adhere to the surfaces of such moulds or frames, and hence the surfaces shall
present a smooth, neat, and finished appearance.
Under the first of my Invention I make the moulds of paraffine or similar
wax-like substance, unacted upon by alkaline matter, mixed with sand, charcoal, or
other finely divided material. In some cases paraffine alone may be used. These
moulds are suitable for forming ornamental blocks, or blocks of various patterns
used in building operations, of which a large number is not. required. If it is desired
to obtain a very smooth surface a stream of hot air or steam may be passed over the
surface of the mould before the concrete is filled in.
Under the second part I form the moulds or frames of timber, metal, or rigid
material or moulders' sand, the surfaces of which are coated with paraffine or other
wax-like substance in solution, or run on the surface by heat, either with or without
admixture with sand, charcoal, or other finely divided material. The surface of the
moulds may be sleeked with a hot or cold tool, as required.
Under the third part I form the mould of a rigid material, and cover the surfaces
with lac, mastic, or other varnish.
Under the fourth part I form the moulds of metal, and japan or enamel the
surfaces.
Moulds constructed under the first part of my Invention may be formed from
patterns in manner similar to sand moulds for metal, or that they may be formed
by hand.
Moulds constructed under the second, third, and fourth parts of my Invention
may be caused to produce embellished and ornamental blocks by the addition
thereto of patterns or devices formed from paraffine or paraffine mixed with sand,
charcoal, or other finely divided matter.
It will be evident that moulds or frames constructed under the above four heads
may be formed in many ways without departing from my Invention, and that the
concrete structures, blocks, or articles produced may have any desired form or
shape.
Having now described the nature of the said Invention in such manner that others
will be enabled to carry my improvements into effect, I claim,-
Under the first head, constructing or making moulds of paraffine or similar wax-
like substance, unacted upon by alkaline matter, either alone or mixed with fine
material, substantially as and for the purposes set forth.
Under the second head, constructing or forming moulds or frames of rigid
material, coated with paraffine or other wax-like substance, alone or mixed with
fine material, substantially as described for the purposes set forth.
Under the third part, constructing moulds or frames of rigid material, covered
with lac, mastic, or other varnish, for the purpose set forth.
Under the fourth head, constructing or forming moulds or frames of rigid material,
japanned or enamelled, for the purposes set forth.
In witness whereof, I, the said John Carrington Sellars, have hereunto set
my hand and seal, the Eighth day of October, in the year of our Lord
One thousand eight hundred and seventy-seven.
J. JOHNSON,
Patent Office,
Clayton Square,
Liverpool.
Witness.
JNº. C. SELLARS. (L.S.)