IMPROVEMENTS IN THE MANUFACTURE OF SOAP
Year: 1876

page_text: LETTERS PATENT to Samuel Shaw Lewis, of Boston, Massachusetts, United
States of America, now of S, Southampton Buildings, London, for the Inven-
tion of "IMPROVEMENTS IN THE MANUFACTURE OF SOAP."
Sealed the 16th September 1876, and dated the 17th March 1876.
PROVISIONAL SPECIFICATION left by the said Samuel Shaw Lewis at the
Office of the Commissioners of Patents on the 17th March 1876.
SAMUEL SHAW LEWIS, of Boston, Massachusetts, United States of America, now
of No. 8, Southampton Buildings, London. "IMPROVEMENTS IN THE MANUFACTURE
OF SOAP."
My said Invention relates to the manufacture of what is termed oil soap, and
consists in combining with the same soluble glass or silicate of soda, or silicate of
potash to increase the detergent or cleansing properties of the soap, and a farina-
ceous material which effects the union of the substances and binds or incorporates
them intimately together. By this Invention I can produce soap which possesses
superior detergent properties while free from any substances which will not
otherwise injure any material subjected to its action, and it is very cheaply manu-
factured.
In practising my Invention I first take potato flour, wheat flour, rice flour,
dextrine, or other suitable farinaceous substance, and combine therewith a viscious
solution of soluble glass, or solution of silicate of soda, or silicate of potash, in the
proportion of about one part of flour to ten or twelve parts of the silicate.
The soap is manufactured with oleic acid by the usual boiling process, with
the addition of a small quantity of resin, say about one part of resin to ten parts
of the soap. When this process is finished and while the soap remains hot and in a
fit condition for pouring into the cooling frames I add to it the aforesaid compound
of the silicate and farinaceous substance in the proportion of about one part by
weight of the said compound to three parts of soap, more or less. These materials
are thoroughly incorporated or mixed by crutching or stirring, and then the whole
is poured into the said frames and allowed to cool and solidify.
For household or laundry purposes I use, by preference, a soap made of oleic
acid mixed with common tallow or animal grease and resin, and procced in a manner
[Price 2d l

page_text: similar to that above described; if deemed necessary I add a certain proportion
of French chalk to give firmness to the soap.
In practising my Invention I prefer that the viscious solution of soluble glass or
solution of silicate of soda should have a specific gravity of 1,700° of Twaddle's
gauge.
SPECIFICATION filed in pursuance of the conditions of the Letters Patent, and
of an Order of the Lord Chancellor, by the said Samuel Shaw Lewis in the
Great Seal Patent Office on the 29th September 1876.
SAMUEL SHAW LEWIS, of Boston, Massachusetts, United States of America, now
of 8, Southampton Buildings, London. "IMPROVEMENTS IN THE MANUFACTURE OF
SOAP."
The said Invention relates to the manufacture of what is termed oil soap, and
consists in combining with the same soluble glass or silicate of soda, or silicate of
potash, to increase the detergent or cleansing properties of the soap, and a farina-
ceous material which effects the union of the substances and binds or incorporates
them intimately together. By this Invention I can produce soap which possesses
superior detergent properties while free from any substances which would injure
any material subjected to its action, and it is very cheaply manufactured.
In practising my Invention I first take potato flour, wheat flour, rice flour,
dextrine, or other suitable farinaceous substance, and combine therewith a viscous
solution of soluble glass, or solution of silicate of soda, or silicate of potash, in the
proportion of about one part of flour to ten or twelve parts of the silicate. These
ingredients are blended together so as to form a transparent solution (or fluid)
retaining the full strength of the silicate.
The soap is manufactured with oleic acid by the usual boiling process, with the
addition of a small quantity of resin, say about one part of resin to fifteen parts of
the soap. When this process is finished and while the soap remains hot and in a fit
condition for pouring into the cooling frames I add to it the aforesaid compound of
the silicate and farinaceous substance in the proportion of about one part by weight
of the said compound to three parts of soap, more or less. These materials are
thoroughly incorporated or mixed by crutching or stirring, and then the whole is
poured into the said frames and allowed to cool and solidify.
For household and laundry purposes I use, by preference, a soap made of oleic
acid mixed with common tallow or animal grease and resin, and proceed in a
manner similar to that above described; if deemed necessary I add a certain pro-
portion of French chalk to give firmness to this soap.
In practising my Invention I prefer that the viscous solution of soluble glass or
solution of silicate of soda should have a specific gravity of 140° of Twaddle's
gauge.
Having thus fully described my said Invention and the manner of performing
the same, I wish it understood that I claim, the combination of silicate of soda,
potato flour, or other suitable farinaceous substances and resin in the manufacture
of oil soap for cleansing wool and for similar purposes.
In witness whereof, I, the said Samuel Shaw Lewis, have hereunto set my
hand and seal, this Twenty-eighth day of September, in the year of our
Lord One thousand eight hundred and seventy-six.
S. S. LEWIS. (L.S.).