IMPROVEMENTS IN SOAP OR SOAP COMPOUNDS
Year: 1878

page_text: LETTERS PATENT to Henry Bernhardt Gross, of Liverpool, in the County of
Lancaster, for the Invention of "IMPROVEMENTS IN SOAP OR SOAP
COMPOUNDS."
Sealed the 4th October 1878, and dated the 22nd June 1878.
PROVISIONAL SPECIFICATION left by the said Henry Bernhardt Gross at
the Office of the Commissioners of Patents on the 22nd June 1878.
HENRY BERNHARDT GROSS, of Liverpool, in the County of Lancaster.
PROVEMENTS IN SOAP OR SOAP COMPOUNDS."
"IM-
This Invention consists in taking any ordinary soap, boiling it, and intimately
mixing it with finely ground flint, quartz, corundum, or other very hard angular
material in a very fine state of comminution. Chemically precipitated silica or
alumina would do if angular and sufficiently comminuted. The mixture is now dried
and pressed in moulds or otherwise manipulated so as to make it a marketablo
commodity, any of the well-known processes being available that will not cause a
separation of the mixture into its two constituents by the force gravity or otherwise.
In choosing materials it is of course desirable to get them as white as possible,
and they should be ground so fine as to be nearly impalpable, and present a slight
grittiness to the ordinary touch.
One advantage of my soap is that while but slightly gritty to the touch it is
admirably adapted for cleaning and polishing brass and iron work and other articles
of a hard nature.
:

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Henry Bernhardt Gross in the Great Seal Patent Office on the
21st October 1878.
HENRY BERNHARDT GROSS, of Liverpool, in the County of Lancaster. "IM-
PROVEMENTS IN SOAP OR SOAP COMPOUNDS."
This Invention consists in taking any ordinary soap, boiling it, and intimately
mixing it with finely ground flint, quartz, corundum, or other very hard angular
material in a very fine state of comminution; chemically precipitated silica or
alumina would do if angular and sufficiently comminuted. The mixture is now
dried and pressed in moulds or otherwise manipulated so as to make it a marketable
commodity, any of the well-known processes being available that will not cause a
separation of the mixture into its two constituents by the force of gravity or
otherwise.
In choosing materials it is of course desirable to get them as white as possible,
and they should be ground so fine as to be almost impalpable, and present a slight
grittiness to the touch.
One advantage of my soap is that while but slightly gritty to the touch it is
admirably adapted for cleaning and polishing brass and iron work and other articles
of a hard nature.
The proportions of the two ingredients vary according to the fineness of the
grinding and the grittiness of the material.
When ground alumina is used a greater weight of it would be desirable per
pound of soap than in the case of silica, but as silica in the form of powdered quartz
will always be most used, and is the material I prefer, I will give the average
quantities that I have found best for that material only, namely, ground quartz,
forty per cent. weight; soap, sixty per cent. weight.
Having now described my Invention, and the best mode known to me of carrying
it into effect, I beg to state that what I believe to be new, and desire to claim
under the herein-before in part recited Letters Patent is, 'the manufacture of soap or
soap compounds combined with artificially powdered flint, quartz, or other hard
angular abrading or scouring material in a fine state of comminution, for the
purposes described.
In 'witness whereof, I, the said Henry Bernhardt Gross, have hereunto set
my hand and seal, this Third day of October, in the year of our Lord
One thousand eight hundred and seventy-eight.
HENRY BERNHARDT GROSS. (L.S.)
Witness,
JOHN O. O'BRIEN,
Clerk to W. P. Thompson and Co.,
British and International Patent Agents,
G, Lord Street,
Liverpool.