IMPROVEMENTS IN THE MANUFACTURE OF ENAMELED PIPES, PIPE COUPLINGS, AND OTHER ARTICLES OR APPARATUS EXPOSED TO THE ACTION OF GASES OR LIQUIDS
Year: 1874

page_text: LETTERS PATENT to George Haseltine, of the "International Patent
Office," Southampton Buildings, London, Doctor of Laws, for tho
Invention of "IMPROVEMENTS IN THE MANUFACTURE OF ENAMELED PIPES,
PIPE COUPLINGS, AND OTHER ARTICLES OR APPARATUS EXPOSED TO THE ACTION
OF GASES OR LIQUIDS."-A communication from abroad by the
American Enamel Company, Incorporated under the Laws of the
State of Rhodo Island, United States of America,
COMPLETE SPECIFICATION filed by the said George Haseltine at the
Office of the Commissioners of Patents, with his Petition and
Declaration, on the 31st December 1874, pursuant to the 9th Section
of the Patent Law Amendment Act, 1852.
Б
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
HASELTINE, of the "International Patent Office," Southampton
Buildings, London, Doctor of Laws, send greeting.

page_text: agitation by stirring. The boiling process must be carefully conducted,
as upon its proper management the success of the result depends, and
unless it is continued to the point when the composition becomes
"ropy" and of the consistency of syrup failure will ensue. The test to
be applied to determine if the mixture is properly cooked is to allow
from time to time a few drops to fall upon a sheet of tin or glass. If
they fall without spattering and assume the form of coherent globules
which when touched by the finger will adhere to the skin and are
readily drawn out into an attenuated thread the composition may be
considered sufficiently boiled; but unless this quality is exhibited the
boiling process must be continued until it appears. The said com-
position after the boiling process has been completed should be permitted
to cool, when it is reduced with naphtha or other solvent to a more liquid
state. The article coated with this composition should be subjected for
three or four hours to a hoat which may vary from 120° to 400° of
Fahrenheit, according to the consistency of the composition, but it
should be of sufficient degree and sufficiently long continued to
thoroughly bake the said composition. If one application of this
enameling composition is insufficient to thoroughly coat the surface of
the pipes or fittings the process should be repeated until a surface
covering of sufficient thickness has been obtained.
By this Invention wrought-iron pipes for example, which are unfit for
distributing water in dwelling houses, are renderod after they have been
protected as described in every respect suitable for such use, and are
more desirable on account of their great cheapness and complete pro-
tection against deleterious influence on the water than lead, or tin-lined
lead or tinned brass pipes. Pipes and fittings so coated constitute a
new manufacture which enables a material to be adapted to uses for
which it was previously unfitted.
I do not mean to be understood as confining' myself to the employ-
ment of a composition of the said elements in the same proportions as
above described, but any other composition of the same general
character possessing similar qualities and capable when spread upon a
surface and subjected to the action of a high artificial heat of developing
a tenacious and coherent coating impervious to water may be used.
Linseed oil alone without the addition of any pigment or other ingredient
above mentioned when sufficiently "cooked" by subjecting the same to

page_text: heat will make a suitable enameling composition; the one I have above
described I consider however to be the best for general uso.
Having thus fully described the said Invention as communicated to
me by my foreign correspondent, and the manner of performing the
same, I wish it understood that I claim, pipe and pipe fittings and ♬
couplings and other apparatus for the conveyance of liquids or gases or
exposed to the action thereof, coated with an enameling composition,
which under artificial heat is developed into a surface covering of the
character above specified.
In witness whereof, I, the said George Haseltine, havo hereunto set. 1
my hand and seal, this Thirty-first day of December, in the year
of our Lord One thousand eight hundred and soventy-four.
Witness,
HY. JA. NoONE.
GEORGE HASELTINE. (L.s.)