ROVEMENTS IN THE CONSTRUCTION OF WATER COCKS AND ĜAS COCKB.
Year: 1870

page_text: LETTERS PATENT to William Harvey, of Brewer Street, in the County
of Middlesex, Gas and Hot Water Engineer, for the Invention of
IMPROVEMENTS IN THE CONSTRUCTION OF WATER COCKS AND ĜAS COCKB.'
Sealed the 14th February 1871, and dated the 17th August 1870.
PROVISIONAL SPECIFICATION left by the said William Harvey at
the Office of the Commissioners of Patents, with his Petition, on the
17th August 1870.
´I, William HARVEY, of Brewer Street, in the County of Middlesex,
Gas and Hot Water Engineer, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF WATER COCKS AND GAS
Cocks," to be as follows:-
The object of my Invention is to construct water and gas cocks in
such a manner that hot and cold water or gases of different qualities
may be passed through the cock simultaneously and mixed in any
proportions that may be desired. To this end the body of the cock is
made with two supply or entrance apertures and one exit aperture through
:

page_text: "
which the gas or water. from the two supplies will pass. The plug of
the cock is made solid and is provided with three apertures corresponding
to the openings in the body. The openings in the body are, however,
made of double the width or superficial area of the corresponding
openings in the plug, and the two supply openings are so arranged in
reference to each other that the full supply from both may be passed
at the same time through the exit opening. It will be understood that
as the openings in the body of the cock are twice as wide as the corre-
sponding openings in the plug the latter may be turned on its axis to a
certain extent so as to cut off the flow partially or wholly from one
supply without necessarily affecting the supply from the other. The
plug is kept down on its seat by means of a spring, and the spindle of
the plug passes up through a dial plate, and on this spindle is mounted
an index or pointer and a handle for turning the plug in any desired
direction.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Harvey in the Great Seal Patent Office
. on the 17th February 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
HARVEY, of Brewer Street, in the County of Middlesex, Gas and Hot
Water Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventeenth day of August, in the year
of our Lord One thousand eight hundred and seventy, in the thirty-fourth
year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said William Harvey, Her special licence, that
I, the said William Harvey, my executors, administrators, and assigns, or
such others as I, the said William Harvey, 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 Ireland, the Channel Islands,
and Isle of Man, an Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF
WATER COCKS AND GAS COCKS," upon the condition (amongst others) that I,

page_text: the said William Harvey, my executors or administrators, by an instru-
ment 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 William Harvey, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement, reference being had to the Drawings hereunto
annexed and to the letters and figures marked thereon (that is to say):-
-
The object of my Invention is to construct water and gas cocks in
such a manner that hot and cold water or other liquids, or gases, or air
of different qualities may be passed through the cock separately or
simultaneously and mixed in any proportions that may be desired, or
these gases or liquids may be diverted in any required direction.
'
In the accompanying Drawings the Figures in Sheet I. are different
views of a water cock such as would be required for a bath which may
be supplied with hot, cold, or tepid water through the same cock; Fig. 1
is a vertical section of the cock, and Fig. 2 is a plan showing the index
plate and handle whereby the cock is worked; Figures 3, 4, and 5 are
horizontal sections shewing the plug of the cock in three different
positions.
.
The body a of the cock is made with two or more supply or entrance
apertures a¹, a', and one exit aperture a² through which the water from
the two supplies a¹, a', will pass, as shewn at Fig. 4. The plug 6 of the
cock is made solid and is provided with three apertures 6', 6', and b²,
corresponding to the openings a³, a¹, a², in the body. The openings a³, a²,
in the body a are however made of double the width or superficial area
of the corresponding openings in the plug b, and the two supply openings
are so arranged in reference to each other that the full supply from
both may be passed at the same time through the plug b. to the exit
opening a². It will be understood that as the openings a', a, a², in the
body of the cock are twice as wide as the corresponding openings b', b, b²,
in the plug b, the latter may be turned on its axis to a certain extent so.

page_text: as to cut off the flow partially or wholly from one supply, as shewn at
Figures 3 and 5 without necessarily affecting the supply from the other.
The plug 6 is kept down on its seat by means of a spring c, Fig. 1, and
the spindle d of the plug passes up through a dial plate e, and on this
spindle is mounted an index or pointer and a handle g for turning the
plug in any desired direction.
It will now be understood that if the plug 6 be turned as shown at
Fig. 3 only cold water will pass through, and if the plug be turned as
shown at Fig. 5 only hot water will pass through, but if the plug 6 be
turned midway between the two, both hot and cold, and, consequently,
tepid water will be supplied.
14
The Figures in Sheet II. represent various views of a gas cock; Fig. 6
is a vertical section of the cock; Figures 7, 8, and 9 are horizontal
sections of the same. This cock like the other is a three-way cock, and
is intended to divert the gas to either one of three or more exit or supply
pipes according to whether a white, red, or green light is required.
a is the body of the cock; b, the plug; c, the spring for keeping it in
its place; d is the spindle of the plug, and to which the handle g for
turning the plug and the index for pointing out its position are fixed.
The spindle, d passes up through the dial plate e (see Fig. 10) as before,
but in this instance is made hollow to receive a screwed spindle h,
provided at its upper end with a milled head ', and carrying at its lower
end a conical valve i, which has its scat at the lower end of the plug b.
By raising or lowering this valve the quantity of gas allowed to pass
through the plug may be regulated to a nicety, and may be gradually
increased or diminished as may be required. This construction of cock
is intended for use in theatres or other places where different colored
lights may be required from time to time.
Having now described my Invention of "Improvements in the Con-
struction of Water Cocks and Gas Cocks," and having explained the
manner of carrying the same into effect, I claim as the Invention secured
to me by Letters Patent as aforesaid, constructing the plug of the cock
with three or more ways, one of which shall be larger in area than either
of the others, as and for the purposes herein set forth and shewn in
Sheet I.
As regards gas cocks, I claim the construction and arrangement of
parts shewn in Sheet II. or any mere modification thereof whereby the

page_text: gas may be diverted to any one of two, three, or more pipes, as and for
the purposes herein set forth.
In witness whereof, I, the said William Harvey, have hereunto set
my hand and seal, the Seventeenth day of February, in the year
of our Lord One thousand eight hundred and seventy-one.
WILLIAM HARVEY. (L.S.)