IMPROVEMENTS IN IRON ROADS AND STREETS
Year: 1877

page_text: LETTERS PATENT to William Richter, of Berlin, in the Kingdom of Prussia,
for the Invention of "IMPROVEMENTS IN IRON ROADS AND STREETS."
Sealed the 1st February 1878, and dated the 24th August 1877.
PROVISIONAL SPECIFICATION left by the said William Richter at the
Office of the Commissioners of Patents on the 24th August 1877.
WILLIAM RICHTER, of Berlin, in the Kingdom of Prussia. "IMPROVEMENTS IN
IRON ROADS AND STREETS."
The bottom or bed of my improved roadway consists of a layer of about 10
inches thick of rough gravel, or flint, or limestone, indicated by a on the
accompanying Drawing. Upon this is placed a second layer b, of about 5 inches
thick, of the same materials, in pieces of from about 2 to 3 cubic inches. This
latter layer will be rendered compact by the aid of a roller, and by the addition of
quicklime for moistening, or ground trass. On this foundation is spread a layer of
broken or pounded scoria or slag, obtained from puddling or reheating furnaces, of
about an inch thick, and upon this a last layer c, of about 3 to 4 inches thick, of pieces
of cast iron of from about one to two cubic inches. This last layer is consolidated
by carefully spreading over it during the whole time that it is being rolled, pounded
or crushed scoria, or slag, and granulated cast iron, mixed with a small portion of
sal ammoniac and flowers of sulphur, or moistened with an acid. The roadway thus
formed should not be opened for traffic until the mastic or cement pressed between
the pieces of cast iron has properly set.
It will be understood that the basis of my Invention is the use of pieces of cast
iron bound together by the mastic or cement above described.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Richter in the Great Seal Patent Office on the 9th
February 1878.
WILLIAM RICHTER, of Berlin, in the Kingdom of Prussia.
IRON ROADS AND STREETS.">
•
"IMPROVEMENTS IN
The bottom or bed of my improved roadway consists of a layer of about ten
inches thick of rough gravel, or flint, or limestone, indicated by a
on the
accompanying Drawing. Upon this is placed a second layer b, of about five inches
thick, of the same material, in pieces of from about two to three cubic inches. This
latter layer will be rendered compact by the aid of a roller and by the addition of
quicklime for moistening, or ground trass. On this foundation is spread a layer of
broken or pounded scoria or slag, obtained from puddling or reheating furnaces, of
about an inch thick, and upon this a last layer c, of about three to four inches
thick, of pieces of cast iron of from about one to two cubic inches. This last layer
is consolidated by carefully spreading over it during the whole time that it is being
rolled, pounded or crushed scoria, or slag, and granulated cast iron, mixed with a
small portion of sal ammoniac and flowers of sulphur, or moistened with an acid.
The roadway thus formed should not be opened for traffic until the mastic or cement
pressed between the pieces of cast iron is properly set.
Having now described and ascertained the nature of my said Invention, and in
what manner the same is or may be performed, I desire it to be understood that I do
not confine myself to the precise details herein-before set forth, as such may be
varied while retaining the special characteristics of my Invention; and I claim as
secured to me by the herein-before in part recited Letters Patent, the use ofpieces of
cast iron bound together by the mastic or cement above described, substantially as
and for the purpose herein-before specified.
In witness whereof, I, the said William Richter, have hereunto set my
hand and seal, this Second day of February, in the year of our Lord One
thousand eight hundred and seventy-eight.
TTT TTAM
DICHTED