A PROCESS FOR INCREASING THE DURABILITY OF LEATHER SOLES AND MEANS FOR CARRYING THE SAME INTO EFFECT
Year: 1882

page_text: LETTERS PATENT to Edwin Ambrose Brydges of the Firm of Brydges &
Co. Engineers and Patent Solicitors of 73 Koniggratzer Str. in the City of
Berlin and German Empire and of G St. Leonards Terrace Upton, in the
County of Middlesex for an Invention of A PROCESS FOR INCREASING THE
DURABILITY OF LEATHER SOLES AND MEANS FOR CARRYING THE SAME INTO
EFFECT A communication from the Firm of Heller and Atzler, of the
Village of Potschappel in the Kingdom of Saxony and German Empire
PROVISIONAL SPECIFICATION left by the said Edwin Ambrose Brydges at
the Office of the Commissioners of Patents on the 8th February 1882.
EDWIN AMBROSE BRYDGES of the Firm of Brydges and Co. Engineers and
Patent Solicitors of 73 Königgrätzer Str. in the City of Berlin and German
Empire and of 6 St. Leonards Terrace Upton in the County of Middlesex.
A PROCESS FOR INCREASING THE DURABILITY OF LEATHER SOLES, AND MEANS
FOR CARRYING THE SAME INTO EFFECT, A communication from the Firm of Heller
and Atzler of the Village of Potschappel in the Kingdom of Saxony and German
Empire,
This Invention relates to a process for increasing the durability of leather soles
and means for carrying the same into effect.
In order to impart to tho soles of boots and shoes a greater capability of resisting
wear and tear, I employ as result of numerous experiments the following mixture.
50 parts of linseed oil varnish 10 parts of silicate of potassa 40 parts of finely
powdered emery The three ingredients aro thoroughly mixed and stirred until
they acquire the proper consistency for paintaing, and the mixture is slightly
warmed previous to use.
The following is the method of operation;
The paint or mixture is applied to the sole of the boot by means of an ordinary
brush which is dipped only into the fluid part of this mixture, this being rendered
easy through the sinking of the emery powder.

page_text: This first coat must be so applied that the sole can absorb a sufficient quantity
of the same. It is useless to apply a large quantity of emery as when the fluid
ingredients of the paint dry, the emery remains detached on the sole of the
boot and must fall off as it has been deprived of the uniting force or binding
properties.
This first coat requires about 24 hours to dry after which the second coat can be
applied. By this operation the mixture or mass must be continuously stirred so
that the emery is also used.
When this coat is dry for which 24 hours is also necessary, the prepared or
impregnated sole is ready for use.
By impregnating the soles with the first coat of paint which consists chiefly of
linseed oil varnish and silicate of potassa the soles are rendered capable of with-
standing the destructive influence of dampness and at the same time not deprived
of their elasticity.
The purpose of the second coat is by using emery, one of the hardest minerals
to provide the soles with a hard coating. When the boots or shoes are in wear,
the emery for the most part, enters into the leather and thus an artificial petrifi-
cation of the outer surface of the leather soles is attained by which their durability
is greatly increased.
Instead of the emery entering simply by the wear, the same can be forced into
the leather by means of a broad hammer after the second coat is dry.

page_text: 40 parts or nuely powdered emery.
The three ingredients are thoroughly mixed and stirred until they acquire the
proper consistency for painting and the mixture is slightly warmed previous to use.
The following is the method of operation:
The paint or mixture is applied to the sole of the boot by means of an ordinary
brush, which is dipped only into the fluid part of this mixture, this being rendered
easy through the sinking of the emery powder.
This first coat must be so applied, that the sole can absorb a sufficient quantity
of the same.
It is useless to apply a large quantity of emery as when the
fluid ingredients of the paint dry, the emery remains detached on the sole of the
boot and must fall off as it has been deprived of the uniting force or binding
properties.
This first coat requires about 24 hours to dry, after which the second coat can
be applied.
By this operation, the mixture or mass must be continuously stirred so that the
emery is also used.
When this coat is dry for which 24 hours is also necessary, the prepared or
impregnated sole is ready for use.
By impregnating the soles with the first coat of paint which consists chiefly of
linseed-oil-varnish and silicate of potassa the soles are rendered capable of with-
standing the destructive influenco of dampness and at the same time not deprived
of their elasticity.
The purpose of the second coat is by using emery-one of the hardest minerals—
to provide the soles with a hard coating.
When the boots or shoes are in wear the emery for the most part enters the
leather and thus an artificial petrification of the outer surface of the leather soles
is attained, by which their durability is greatly increased.
Instead of the emery entering simply by the wear, the same can be forced into
the leather by means of a broad hammer after the second coat is dry.
Instead of employing silicate of potassa (K, Si O,) in the composition silicate of
of soda (Na, Si O,) can be used.
Having now described this said Invention, I desire it to be understood, that I
do not confine myself to the exact proportions of the ingredients mentioned in the

page_text: foregoing Specification, as being the result of various experiments, as the proportions
may be altered without departing from the tenor of this Invention; but what
I claim and desire to secure by Letters Patent is:
The process of increasing the durability of leather soles in which a composition
is employed consisting of linseed-oil-varnish, emery powder, and silicate of
potassa (K, Si O₁) or silicate of soda (Na. Si O.) mixed together in suitable
proportions, and applied in the manner described in the foregoing Specification.
In witness whereof I the said Edwin Ambrose Brydges have hereunto set my
hand and seal this Sixth day of August in the year of our Lord One
thousand eight hundred and eighty two.
Witnesses
JOHN O. TONKIN
ARTHUR BAERMANN.
EDWIN A. BRYDGES. (L.S.)
Patentee