IMPROVEMENTS IN THE MANU- FACTURE OF A NON-HEAT-CONDUCTING COMPOSITION SUITABLE FOR PROTECTING METALLIC OR OTHER SURFACES, SUCH AS STEAM BOILERS, ENGINE CYLINDERS, FURNACES, PIPES, FUNNELS, WALLS, WOOD WORK, MASONRY, ET CETERA.”
Year: 1879

page_text: LETTERS PATENT to Charles Pollard, of Accrington, in the County of Lancaster,
Cement Manufacturer, for the Invention of "IMPROVEMENTS IN THE MANU-
FACTURE OF A NON-HEAT-CONDUCTING COMPOSITION SUITABLE FOR PROTECTING
METALLIC OR OTHER SURFACES, SUCH AS STEAM BOILERS, ENGINE CYLINDERS,
FURNACES, PIPES, FUNNELS, WALLS, WOOD WORK, MASONRY, ET CETERA.”
PROVISIONAL SPECIFICATION left by the said Charles Pollard at the Office
of the Commissioners of Patents on the 8th May 1879.
CHARLES POLLARD, of Accrington, in the County of Lancaster, Cement Manu-
facturer. "IMPROVEMENTS IN THE MANUFACTURE OF A NON-HEAT-CONDUCTING
COMPOSITION SUITABLE FOR PROTECTING METALLIC OR OTHER SURFACES, SUCH AS
STEAM BOILERS, ENGINE CYLINDERS, FURNACES, PIPES, FUNNELS, WALLS, WOOD
WORK, MASONRY, ET CETERA."
My improvements consists in making what I term dry composition, to be made as
follows: Usualy the clay used in making composition or cement was placed in
the morter mill in a wet state and ground along with hair, wool, or other fibrous
material into a putty or plastic state."'
I propose to dry the clay or like material thoroughly in ovens or sheds, to which
heat may be applied, such as steam, hot air, or water, for drying such clay or like
material; it is thence placed in the morter mill or other similar contrivance, when
it will be ground along with hair, wool, or other fibrous material to powder in this
dry or powdery condition. I place it in bags, boxes, or barrels until required for
use. When it is desired to cover or protect any part of steam boilers, engine
cylinders, furnaces, pipes, funnels, walls, wood work, masonry, etcetera, with my
improved composition warm water or other liquid should be added and well mixed
until it becomes of the consistancy of paste or putty; it is now ready to be applied
to the parts required.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Charles Pollard in the Great Seal Patent Office on the 6th
November 1879.
CHARLES POLLARD, Cement Manufacturer, Accrington, in the County of Lan-
caster. "IMPROVEMENTS IN THE MANUFACTURE OF A NON-HEAT-CONDUCTING
COMPOSITION SUITABLE FOR PROTECTING METALLIC OR OTHER SURFACES, SUCH AS
STEAM BOILERS, ENGINE CYLINDERS, FURNACES, PIPES, FUNNELS, WALLS, WOOD
WORK, MASONRY, &C."
My Invention consists in the manufacture of what I term dry non-heat-
conducting composition or cement for the purpose of preventing the radiation or
escape of heat from metallic or other surfaces. Heretofore non-heat-conducting
composition or cement has been manufactured in a wet or plastic state, and has
been kept packed up in that state ready for application. It has been found that
after standing some time in this wet state an offensive smell is emitted caused by
the decomposition of the fibrous substances contained in the cement, also causing a
loss of its adhesive properties. In making non-heat-conducting composition or
cement after the manner of my Invention I first dry the clay or other like substance.
thoroughly by spreading it on the floor of any convenient building, underneath
which is placed by preference a pipe or pipes or any other apparatus by which heat
may be given off (although the heating apparatus may be placed otherwise than
under the floor if found desirable). Having dried the clay by these means I place
it in a mortar mill or other machine, whereby the clay is ground or pounded down
to a fine powder, and mixed with hair, wool, or other fibrous substance. In this
dry and powdered condition it is ready to be packed until required for use, thus
retaining its adhesive properties and preventing that offensive smell which is so
prevalent with composition manufactured and kept in a wet state. When it is
desired to cover or protect metallic or other surfaces so as to prevent the radiation
or escape of heat with my improved composition warm water or other liquid should
be added and the whole well mixed to the consistency of paste, and is then ready
for application to the surfaces required to be covered or protected.
Having now described the nature and practice of my said Invention, and in
what manner the same is or may be performed, I wish it to be understood that
what I claim as my Invention is, the inanufacture by a dry method of a non-heat-
conducting composition or cement made in the manner and for the purposes herein
described and fully set forth.
In witness whereof, I, the said Charlos Pollard, have hereunto set my hand
and seal, this Fourth day of November, in the year of our Lord One
thousand eight hundred and seventy nine.
Signed and sealed by the
said Charles Pollard in
the presence of
THOMAS RICHMOND,
Patent Agent,
Burnley.
CHARLES POLLARD. (L.S.)