IMPROVEMENTS IN THE PREPARATION OF HEAT RESISTING MATERIALS
Year: 1877

page_text: LETTERS PATENT to Thaddeus Hyatt, of 66, Gloucester Gardens, Hyde
Park, in the County of Middlesex, Manufacturer of Patent Lights, and
Thomas Rickett, of 3, Devonshire Place, Pershore Road, near Birmingham,
Engineer, for the Invention of IMPROVEMENTS IN THE PREPARATION OF
HEAT RESISTING MATERIALS.”
"E
Sealed the 21st August 1877, and dated the 28th June 1877.
PROVISIONAL SPECIFICATION left by the said Thaddeus Hyatt and Thomas
Rickett at the Office of the Commissioners of Patents on the 28th June
1877.
THADDEUS HYATT, of 66, Gloucester Gardens, Hyde Park, in the County of
Middlesex, Manufacturer of Patent Lights, and THOMAS RICKETT, of 3, Devon-
shire Place, Pershore Road, near Birmingham, Engineer. "IMPROVEMENTS IN
THE PREPARATION OF HEAT RESISTING MATERIALS."
Our Invention relates to the preparation of heat resisting materials, intended
more particularly to be employed in architectural and engineering constructions,
and it has for its object rendering such materials insusceptible of disintegration
under the combined influence of fire and water.
In carrying out our Invention in order to effect this object we take what are
known as hydraulic limes or cements and mix therewith a chemical agent or
compound, such for example as sulphur, or a compound containing sulphur, which
is capable when the combined material is subjected to the action of fire and water
of rendering such material tougher and more cohesive.
The sulphur or other equivalent chemical agent or compound employed, as before
mentioned, may be either mixed with the component materials forming the hydraulic
lime or cement when they are in a state of division, and previously to the admixture
of water therewith, or the sulphur or other équivalent chemical agent or compound
may be incorporated with the hydraulic line or cement before such lime or cement
has been submitted to a burning or heating process, or the hydraulic lime or cement
may at any stage of its manufacture, if practicable, be charged with sulphur or other

page_text: equivalent chemical agent or compound in such a manner that a chemical combina-
tion will be formed either when the material is submitted to the action of heat, or
otherwise capable of producing a power of cohesion which will resist the action of
fire and water to which the material may be subjected.
The materials are capable of being employed generally in architectural, engineering,
and other structures or constructions, either to form the main body of the same, or
as a coating, covering, or protection, or otherwise, as desired.
"
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thaddeus Hyatt and Thomas Rickett in the Great Seal Patent
Office on the 15th December 1877.
THADDEUS HYATT, of 66, Gloucester Gardens, Hyde Park, in the County of
Middlesex, Manufacturer of Patent Lights, and THOMAS RICKETT, of 3, Devon-
shire Place, Pershore Road, near Birmingham, Engineer. "IMPROVEMENTS IN
THE PREPARATION. OF HEAT RESISTING MATERIALS."
Our said Invention relates to the preparation of heat resisting materials, intended
more particularly to be employed in architectural and engineering constructions, and
it has for its object rendering such materials insusceptible of disintegration under
the combined influence of fire and water.
In carrying out our said Invention, in order to effect this object, we take the
improved hydraulic lime known under the name of Portland cement, or other
equivalent hydraulic cement, and mix therewith a chemical agent or material, such,
for example, as sulphur, either in the form of the article of commerce known as
"flowers of sulphur," ar as found combined with other materials, for example, with
iron, in the form of another article of commerce known as iron pyrites," which
shall impart to the hydraulic cement a toughness or power of cohesion when
subjected to the combined action of fire and water.
«
The sulphur or other equivalent chemical agent or material may be mixed with
the hydraulic cement after the usual manufacturing process is completed, or the
sulphur or other equivalent chemical agent may be incorporated with the materials
used in making the hydraulic or other cement previous to calcination, or at any
stage of its manufacture.
It is found more convenient in practise when using flowers of sulphur to add the
same after the cement is manufactured, but if the sulphur is employed in the form
of pyrites, it is immaterial at what stage of the manufacture the same is added.
We prefer to mix the sulphur or other equivalent chemical agent or material in
the proportion of about one part by weight of the sulphur or other equivalent chemical
agent to ten or twelve parts by weight of the other dry materials used in making the
hydraulic cement, but we do not confine ourselves to these proportions, which may
be varied according to circumstances.
The materials are capable of being employed generally in architectural, engineering,
and other structures or constructions, either to form the main body of the same, or
as a coating, covering, or protection, or otherwise, as desired.
Having now, described and particularly ascertained the nature of our said, Inven-
tion, and the manner in which the same is or may be used or carried into effect,

page_text: we would observe in conclusion that what we consider to be novel and original
and therefore claim as the Invention secured to us by the herein-before in part
recited Letters Patent is the preparation of heat resisting materials by the employ-
ment in or admixture with hydraulic cement of a chemical agent or compound
which shall enable the material to retain a degree of toughness or cohesion when
subjected to the combined action of fire and water, and thereby prevent its disinte-
gration, substantially as herein-before described.
In witness whereof, we, the said Thaddeus Hyatt and Thomas Rickett,
have to this our Specification set our hands and seals, this Eighth day
of December, One thousand eight hundred and seventy-seven.
THADDEUS HYATT. (L.S.)
THOS. RICKETT,
(L.S.)