OR IMPROVED IMPERMEABLE COATING FOR PURPOSESPRO
Year: 1883

page_text: A NEW
LETTERS PATENT to Lorentz Albert Groth, K.G.V Civil Engineer, and Managing
Director of The Universal Inventors and Patentees Financial Company
Limited, 30 Finsbury Pavement London E.C for an Invention of
OR IMPROVED IMPERMEABLE COATING FOR
PURPOSES Communicated to him from abroad by Nicolas Bellefroid, a
person resident at Cureghem Anderlecht, in the Kingdom of Belgium,
"
WATERPROOFING AND OTHER
PROVISIONAL SPECIFICATION left by the said Lorentz Albert Groth at
the Office of the Commissioners of Patents on the 24th January 1883.
LORENTZ ALBERT GROTH. K.G.V. Civil Engineer and Managing Director of The
Universal Inventors and Patentees Financial Company Limited 30 Finsbury
Pavement London E.C. "A NEW OR IMPROVED IMPERMEABLE COATING
WATERPROOFING AND OTHER PURPOSES A communication to me from abroad by
Nicolas Bellefroid, a person resident at Cureghem Anderlecht, in the Kingdom of
Belgium,
"
FOR
This improved coating consists firstly of a solution of stearine pitch, one of the
by products of candle making, which pitch in order to be used in the fabrication
of this impermeable coating must previously have been completely oxydized by
exposure to the air.
In order to obtain this complete oxydization the pitch must be spread out in
very thin layers and exposed to the outward atmosphere for a period of at least
two years.
This exposure is absolutely necessary judging from experiences, and experiments
repeatedly made.
The solution is afterwards effected in the following manner.
A mixture consisting of 75 Kilogrammes of Stearine pitch, 150 Kilogrammes o
bailar ar vaska

page_text: of any suitable shape having a second or double bottom, so as to allow of the
removal of impurities which will settle at the bottom of the said vessel.
The mixture is boiled for 12 hours over a strong fire after which 150 litres of
water are added and the boiling continued for another 12 hours
The solution thus obtained is then poured out in an open vessel and left exposed
free to the air for eight days for the purpose of being clarified and enabling the
impurities therein contained to settle at the bottom.
The solution obtained according to the above process has the property of thorough
impermeability.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Lorentz Albert Groth in the Great Seal Patent Office on the
24th July 1883.
LORENTZ ALBERT GROTH K.G.V. Civil Engineer and Managing Director of The
Universal Inventors and Patentees Financial Company Limited 30 Finsbury
Pavement London E.C. "A NEW OR IMPROVED IMPERMEABLE COATING FOR
WATERPROOFING AND OTHER PURPOSES a communication to me from abroad by
Nicolas Bellefroid a person resident at Cureghem Anderlecht in the Kingdom of
Belgium
"
This improved coating consists firstly of a solution of stearine pitch, one of the
by products of candle making which pitch in order to be used in the fabrication
of this impermeable coating must previously have been completely oxydised by
exposure to the air
In order to complete this oxydisation the pitch must be spred out in very
thin layers and exposed to the outward atmosphere for a period of at least two
years
This exposure is absolutely necessary judging from experiments repeatedly
made
The solution is afterwards effected in the following manner A mixture con-
sisting of 75 Kilogrammes of Stearine pitch, 150 Kilogrammes of water and
5 Kilogrammes of Caustic Soda at about 35 to 36 degrees is put into a boiler or
vessel of any suitable shape having a second or double bottom so as to allow of
the removal of impurities which will settle at the bottom of the said vessel
The mixture is boiled for 12 hours over a strong fire after which 150 litres of
water are added and the boiling continued for another 12 hours.
The solution thus obtained is then poured out in an open vessel and left exposed
to the open air for eight days for the purpose of being clarified and enabling the
impurities therein contained to settle at the bottom.
The solution obtained according to the above process has the property of thorough
mpermeability

page_text: Having now described the nature of my said invention and the manner in
which the same is to or may be performed, I would have it understood that what
I claim, is
First. The process herein described for the oxydisation of stearine pitch
Second. The process herein described for effecting the solution
Third An impermeable coating as herein described and the means employed
for its fabrication.
In witness whereof I the said Lorentz Albert Groth have hereunto set my hand
and seal this twentieth day of July in the year of our Lord one thousand eight
hundred and eighty three.
LORENTZ ALBERT GROTH (L.S.)