Improvements in the Manufacture of Cement.
Year: 1887

page_text: Date of Application, 4th Nov., 1887
Complete Specification Left, 7th Aug., 1888
Complete Specification Accepted, 7th Sept., 1888
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Cement.
I, FREDERICK RANSOME, of Lower Norwood, in the County of Surrey, Civil
Engineer, do hereby declare the nature of this invention to be as follows:-
In the specification of a former Patent granted to me No. 5442 in the year 1885
I described burning cement material by introducing it in the state of fine dry powder
into a revolving cylindrical retort heated by the combustion of gas and air within it
or within a combustion chamber into which one end of the retort opened. The
powdered cement material was introduced into the end of the retort at which the
products of combustion were allowed to pass off and was made to travel to the opposite
end and be delivered roasted but still in a finely powdered state suitable for being at
once used as cement without its being necessary to previously grind it.
I now find it more advantageous to heat the cement material in its passage through
the retort to such an extent as to reduce its particles to a condition in which they will
more or less adhere one to another, so that the roasted cement material will pass from
the furnace in the state of small lumps or pellets somewhat admixed with powder.
Subsequently I reduce the roasted material to a fine powder to bring it into a state
suitable for being used as cement.
Dated this 4th day of November 1887.
CARPMAEL & Co.,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in the Manufacture of Cement.
1, FREDERICK RANSOME of Lower Norwood in the County of Surrey, Civil
Engineer do hereby declare the nature of this invention and in what manner the
saule is to be performed to be particularly described and ascertained in and by
the following statement :-
In the specification of a former Patent granted to me No. 5442 in the year 1885
1 described burning cement material by introducing it in the state of fine dry
powder into a revolving cylindrical retort heated by the combustion of gas and air
within it or within a combustion chamber into which one end of the retort opened.
The powdered cement material was introduced into the end of the retort at which
the products of combustion were allowed to pass off and was made to travel to tho
opposite end and be delivered roasted but still in a finely powdered state suitable for
being at once used as cement without its being necessary to previously grind it.
I now find it more advantageous to heat the coment material in its passage
through the retort to such an extent as to reduce its particles to a condition in
which they will more or less adhere one to another, so that the roasted cement
material will pass from the furnace in the state of small lumps or pellets somewhat
admixed with powder. Subsequently I reduce the roasted material to a fine powder
to bring it into a state suitable for being used as cement.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
The manufacture of cement by introducing cement material in the state of fine
dry, powder into a revolving retort and heating the material therein to such an extent
as to cause the particles more or less to adhere to one another and so that the
material shall issue from the retort in the state of small lumps and pellets and
subsequently reducing the roasted material to a fine powder.
Dated this 7th day of August 1888.
CARPMAEL & Co.,
Agents.