IMPROVEMENTS IN THE MANUFACTURE OF ANCHORS
Year: 1877

page_text: LETTERS PATENT to John Garrett Tongue, of the Firm of Tongue and Birkbeck,
Patent Agents and Engineers, of 34, Southampton Buildings, Chancery Lane,
in the County of Middlesex, for the Invention of "IMPROVEMENTS IN THE
MANUFACTURE OF ANCHORS." A communication from abroad by Joseph
Cutajar, of Paris, France.
Sealed the 10th July 1877, and dated the 13th January 1877.
PROVISIONAL SPECIFICATION left by the said John Garrett Tongue at the
Office of the Commissioners of Patents on the 13th January 1877.
JOHN GARRETT TONGUE, of the Firm of Tongue and Birkbeck, Patent Agents
and Engineers, of 34, Southampton Buildings, Chancery Lane, in the County of
Middlesex, "IMPROVEMENTS IN THE MANUFACTURE OF ANCHORS." A communica-
tion from abroad by Joseph Cutajar, of Paris, France.
Up to the present time anchors of every description have been made of wrought
iron by hand forging, steam hammers, and other mechanical appliances, necessarily
being very costly in construction and requiring considerable time in producing
them.
Now according to these improvements anchors of every description are manu-
factured by casting them in iron from patterns, such castings being afterwards
subjected to the process of annealing, so as to convert the same into malleable cast
iron, as is well understood in treating other descriptions of castings.
Anchors thus manufactured are afterwards reheated and finished by hammering
and other operations to render them perfect.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Garrett Tongue in the Great Seal Patent Office on the 13th July
1877.
-
JOHN GARRETT TONGUE, of the Firm of Tongue and Birkbeck, Patent Agents and
Engineers, of 34, Southampton Buildings, Chancery Lane, in the County of Middle-
"IMPROVEMENTS IN THE MANUFACTURE OF ANCHORS." A communication
from abroad by Joseph Cutajar, of Paris, France,
sex.
ID 077

page_text: Up to the present time anchors of every description have been made of wrought
iron by hand forging, steam hammers, and other mechanical appliances, necessarily
being very costly in construction and requiring considerable time in producing
'them.
.
Now according to these improvements anchors of every description are manu-
factured by casting them in iron from patterns, such castings being afterwards
subjected to the process of annealing, so as to convert the same into malleable cast
iron, as is well understood in treating other descriptions of castings.
Anchors thus manufactured are afterwards reheated and finished by hammering
and other operations to render them perfect.
The surfaces of anchors thus manufactured after being finished are subjected to
the action of highly superheated steam, by which they are protected against rust.
Having thus described the nature of the Invention I would have it understood
that I do not claim the manufacture of anchors from ordinary cast iron; but what
I claim under the above in part recited Letters Patent is, the improved manu-
facture of anchors from cast iron by subjecting them to the process of annealing,
so as to convert the same into malleable cast iron, as herein-before described, by
which great strength is imparted to anchors so manufactured.
In witness whereof, I, the said John Garrett Tongue, have hereunto set my
hand and seal, this Twelfth day of July, in the year of our Lord One
thousand eight hundred and seventy-seven.