Year: 1888

page_text: бешець.
We, GEORGE JAMES SNELUS of Workington in the County of Cumberland,
Metallurgist, JOHN CAMERON SWAN of the City and County of Newcastle-on-Tyne,
Merchant and HERBERT SMITH of the City and County of Newcastle, Merchant do
hereby declare the nature of this Invention to be as follows:--
The object of our Invention is to manufacture Cement of the class known as Portland
Cement, or resembling it, in a reliable and economical manner.
According to our Invention we employ in the manufacture blast furnace slag and
lime which we incorporate and burn to form a frit or clinker which we grind or reduce
to the required degree of fineness for use as Cement.
We do not confine ourselves to precise kinds or proportions of the materials above
enumerated nor do we limit ourselves to the precise methods of preparing and treating
them but the following is a good method of performing the invention. We take blast
furnace slag that has fallen to powder or that has been granulated by bringing it into
contact with water whilst in a molten state. We take quick lime which we slack if
the slag does not contain sufficient water for that purpose. These materials are
effectually incorporated which can be conveniently done by grinding them together in
a mortar mill, or by mixing in a cylinder with an endless screw, and the mixture is
then roughly moulded into bricks which are burnt in ordinary brick kilns previously
drying them if necessary. The frit or clinker thus obtained is ground, in a reducing
mill and finished in the ordinary way.
Dated this 16th day of Wahun 1000
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C.,
Agents.

page_text: We GEORGE JAMES SNELUS of Workington in the County of Cumberland
Metallurgist JOHN CAMERON SWAN of the City and County of Newcastle-on-Tyne
Merchant and HERBERT SMITH of the City and County of Newcastle-on-Tyne
Merchant do hereby declare the nature of this Invention and in what manner the
same is to be performed to be particularly described and ascertained in and by the
following statement:-
The object of our Invention is to manufacture in a reliable and economical manner
cement of the class known as Portland Cement or resembling it.
According to our Invention we employ in the manufacture of the Cement Blast
Furnace Slag and Lime which we incorporate and burn to form a frit or clinker which
we grind or reduce to the required degree of fineness for use as cement.
We do not confine ourselves to precise kinds or proportions of the materials above
named nor do we limit ourselves to the precise methods of incorporating burning and
reducing them but the following is the best method with which we are acquainted of
performing our Invention.
We take Blast Furnace Slag that has fallen to powder or that has been granulated
by bringing it into contact with water whilst the said slag is in a molten state. We
take quick lime in or about the proportion of 2 parts of lime to 5 parts of the
slag. We slake this lime if the slag does not contain sufficient water for that
purpose.
These materials are effectually incorporated which can be done conveniently by
grinding them together in a mortar mill or by mixing them in a Cylinder by means of
an endless screw and the mixture is then roughly moulded into bricks or blocks or the
like which are burnt in ordinary brick kilns or other convenient way previously
drying them if necessary. The frit or clinker thus obtained is then ground which
may be done in a reducing mill and finished in the ordinary way.
Having now particularly described and ascertained the nature of our said Inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
First. The manufacture of Cement by mixing and burning blast furnace slag and
Lime and afterwards grinding or reducing the mixture.
Second. The manufacture of Cement by mixing powdered or granulated blast
furnace Slag and Lime in or about the proportion of two parts of lime to five parts of
the said slag forming them into bricks, blocks or the like burning them and grinding
or reducing.
Third. As a new article of manufacture Cement manufactured as hereinbefore
described and claimed.