IMPROVEMENTS IN COCKS, TAPS, AND VALVES, AND IN JOINTS FOR PIPES AND TUBES
Year: 1857

page_text: LETTERS PATENT to David Hulett, of 55 and 56, High Holborn, London,
for the Invention of "IMPROVEMENTS IN COCKS, TAPS, AND VALVES, AND
IN JOINTS FOR PIPES AND TUBES."
Sealed the 21st May 1858, and dated the 23rd November 1857.
PROVISIONAL SPECIFICATION left by the said David Hulett at the
Office of the Commissioners of Patents, with his Petition, on the 23rd
November 1857.
I, DAVID HULETT, of 55 and 56, High Holborn, London, do hereby declare
the nature of the said Invention for "IMPROVEMENTS IN COCKS, TAPS, AND VALVES,
AND IN JOINTS FOR PIPES AND TUBES," to be as follows:-
This Invention consists of making cocks, taps, and joints, or certain portions
of them, of malleable cast iron, uncovered or uncoated, or tinned, galvanised,
or otherwise coated or covered with a metallic substance to resist oxidation,
and susceptible of soldering. The material ordinarily used for the manufac-
ture of these articles is brass, which is considerably dearer and heavier than
malleable cast iron; and I propose, therefore, to use malleable cast iron, either
uncoated or tinned, galvanised, or otherwise covered by a metallic substance,
in making some of the principal portions of cocks, taps, and joints, such as
the barrel, the plug, the shank, and handle, whereby a saving is effected from
the lighter specific weight of this material, and from its lower value and.
greater durability.

page_text: The malleable iron may be coated with zinc and tin, or galvanised, or with
tin alone, or with any amalgam or alloy of metal; but I do not use black or
any other japan or other non-metallic substance.
My Invention of improvements in valves consists in making them wholly or
in part of malleable cast iron, galvanised or coated with any other amalgam.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said David Hulett, in the Great Seal Patent Office on the
22nd May 1858.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, DAVID
HULETT, of 55 and 56, High Holborn, London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-third day of November, in the year of our
Lord One thousand eight hundred and fifty-eight, in the twenty-second year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said David Hulett, Her special licence that I, the said David Hulett,
my exccutors, administrators, and assigns, or such others as I, the said
David Hulett, my executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain and Ire-
land, the Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS
IN COCKS, TAPS, AND VALVES, AND IN JOINTS FOR PIPES AND TUBES," upon tho
condition (amongst others) that I, the said David Hulett, my executors or
administrators, by an instrument in writing under my, or their, or one of
their hands and seals, should particularly describe and ascertain the nature of
the said Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said David Hulett, do hereby declare the
nature of my said Invention, and in what manner the same is to be per-
formned, to be particularly described and ascertained in and by the following
statement:-
This Invention consists of making cocks, taps, and joints, or certain portions
of them, of malleable cast iron, uncovered or uncoated, or tinned, galvanized,
or otherwise coated or covered with a metallic substance to resist oxidation,

page_text: and capable of being joined by solder. The material ordinarily used for the
manufacture of these articles is brass, which is considerably heavier and dearer
than malleable cast iron; and I propose, therefore, to use malleable cast iron,
either uncoated or tinned, galvanized, or otherwise covered by a metallic
substance, in making some of the principal portions of cocks, taps, and joints,
such as the barrel, plug, shank, and handle, whereby a saving is effected,
from the lighter specific weight of this material and from its lower value and
greater durability.
The malleable iron may be coated with zinc and tin, or galvanized, or with
tin alone, or with any amalgam or alloy of metal, but I do not use black or
any other japan or non-metallic substance.
My Invention of improvements in valves consists in making them wholly or
in part of malleable cast iron, galvanized or coated with any other amalgam.
I am aware that cast iron has been used in the manufacture of taps, but
owing to its brittleness it has not been found to answer; but when cast iron
has been rendered into malleable iron, cocks, taps, valves, and joints made
from the malleable metal will last as long, or nearly as long, as those made of
brass.
Having now described the nature of my said Invention, I desire it to be
understood that what I claim is, making cocks, taps, valves, and joints, wholly
or in part of malleable cast iron.
In witness whereof, I, the said David Hulett, have hereunto set my
hand and seal, this Twenty-second day of May, in the year of our
Lord One thousand eight hundred and fifty-eight.
Witness,
C. BARLOW, Patent Agent,
89, Chancery Lane.
D. HULETT. (L.S.)