Improved Process for Rendering Cements Hydraulic, that is to say, Capable of Setting and Hardening under Water.
Year: 1885

page_text: Improved Process for Rendering Cements Hydraulic, that is to
say, Capable of Setting and Hardening under Water.
'I, WILLIAM PHILLIPS THOMPSON Fel. Inst. P.A. of the Agency for Foreign Patent
Solicitors, 6 Lord Street, Liverpool, in the County of Lancaster, and 323 High
Holborn, in the County of Middlesex Civil Engineer, do hereby declare the nature
of the said invention for "IMPROVED PROCESS FOR RENDERING CEMENTS HYDRAULIC
THAT IS TO SAY, CAPABLE OF SETTING AND HARDENING UNDER WATER (a com-
munication from abroad by Robert Bosse and Franz Wolters, of Brunswick
(Germany) to be as follows:-
"
Compound cements, that is to say: cements which are composed of at least two
of the following substances: calcined cement, puzzolane, both natural or artificial
(as blast furnace slag, for instance) lime and all other substances usually entering
into the composition of mortar, and which do not of themselves possess the property
of setting (hardening without alteration of its outward form when tempered with
water) are rendered hydraulic while at the same time their homogeneity and
strength are increased by a supplementary grinding in ball mills or similar
machines, which by compression bring closer together the smallest particles,
previously separated by the operation of grinding, at the same time giving them a
lamellar structure.
WP. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, and
323, High Holborn, London,
Patent Agents for the Applicant.

page_text: say, Capable of Setting and Hardening under Water.
I, WILLIAM PHILLIPS THOMPSON, Fel. Inst. P.A. of the Agency for Foreign Patent
Solicitors, 6 Lord Street, Liverpool, in the County of Lancaster, and 323 High
Holborn, in the County of Middlesex, Civil Engineer, do hereby declare the nature
of the said invention for "IMPROVED PROCESS FOR RENDERING CEMENTS HYDRAULIC,
THAT IS TO SAY, CAPABLE OF SETTING AND HARDENING UNDER WATER (a com-
munication from abroad by Robert Bosse and Franz Wolters, of Brunswick,
(Germany) and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:—
"
Compound cements that is to say cements which are composed of two or more
of the following substances: calcined cement, Puzzuolane, both natural and
artificial (as blast furnace slag, for instance) lime and all other substances usually
entering into the composition of cement and those of the above mentioned com-
ponents which have for themselves cementing properties (as for instance Portland
or Roman cement), if they do not of themselves possess the property of setting
(hardening without alteration of their outward form when tempered with water),
or if they possess this property only in a low degree, are rendered hydraulic or
more hydraulic than they were before, while, at the same time, their homogeneity
and strength are increased by a supplementary grinding in ball mills or similar
machines, which by compression bring closer together the smallest particles
previously separated by the operation of grinding, at the same time giving them a
lamellar structure.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, as communicated to
me by my foreign correspondents, I declare that what I claim is
The method of rendering bydraulic, compound or other cements, by a supple-
mentary grinding in ball mills, or other similar machines, whereby the ground
product is compressed and the finest particles brought closely together in the form
of lamellar or small scales.
Dated thin 5th A
1002