IMPROVEMENTS IN DOUBLE SLIDE Box Cocks
Year: 1875

page_text: LETTERS PATENT to Obadiah Packer, of Westminster, in the County
of Westminster, for the Invention of "IMPROVEMENTS IN DOUBLE SLIDE
Box Cocks."
Sealed the 15th February 1876, and dated the 17th August 1875.
PROVISIONAL SPECIFICATION left by the said Obadiah Packer at the
Office of the Commissioners of Patents, with his Petition, on the
17th August 1875.
I, OBADIAN PACKER, of Westminster, in the County of Westminster,
do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN DOUBLE SLIDE Box Cocks," to be as follows:-
This Invention has for its object improvements in double slide box
cocks. For this purpose I form an outer case of any suitable size and
metal, such case having two orifices opposite each other. Formed in
the top and around such orifices are two metal flanges to allow of the
main pipe being connected thereto. Within such metal case I place
two metal cases or boxes, one being large enough to permit of the other

page_text: fitting easily inside. The outer or larger one is provided with two
circular cavities, one on either side, similar to those on the outer case,
but being of smaller circumference; the inner disc is made solid. I
place a metal screw of a suitable length through the bottom plate of
such outer case, such screw passing through the smaller internal casc,
which is provided in its interior with a female screw to enable it to
move up and down, as hereafter explained. By revolving the screw it
causes the centre case to gradually descend, and thereby the orifice in
the larger case to be opened and permits of the water or other liquid
flowing through in any desired quantity, and when the full force of the
water or other liquid is required by continuing to work the screw the
larger orifice is also caused to descend owing to its having a metal
connection secured to the lower part of the screw by a nut or other
suitable contrivance, which thus draws down the larger metal case and
opens the two orifices in the outer case to their full extent, whereby the
full volume of water is permitted to flow through unobstructed. When
it is desired to shut off the supply this may be done gradually and easily
by turning the screw in the reverse direction when the two internal
boxes or cases are caused to gradually rise, and thus diminish the force
of the water by degrees until it is thoroughly shut off.
The advantages of my Invention is that the most perfect control is
secured over the water or other fluid, the flow of which can either
be increased or diminished to any desired degree with the greatest
facility.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Obadiah Packer in the Great Seal Patent Office
on the 17th February 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, OBADIAH
PACKER, of Westminster, in the County of Westminster, 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-five, in
the thirty-ninth year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto me, the said Obadiah Packer, Her

page_text: special license, that I, the said Obadiah Packer, my exccutors, admi-
nistrators, and assigns, or such others as I, the said Obadiah Packer,
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, excrcise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN DOUBLE SLIDE Box Cocks," upon the condition (amongst
others) that I, the said Obadiah Packer, my executors or adminis-
trators, 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 per.
formed, and cause the same to be filed in the Great Seal Patent Office
within six calendar months next and immediately after the date of tho
said Letters Patent.
NOW KNOW YE, that I, the said Obadiah Packer, do hereby
declare the nature of the said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement thereof, that is to say :--
This Invention has for its object the ensuring the more perfect
control over the flow of the water or other liquid, which by the use of
my Invention can be either increased or diminished at will with the
greatest facility. For this purpose I proceed as follows:-I form an
outer case of any suitable size and metal, such case having two orifices
opposite each other formed in the top, and around such orifices are two
metal flanges or rims to allow of the main pipe being connected thereto.
Within such metal case I place two metal boxes, one being large enough
to permit of the other fitting easily inside. The outer or larger one is
provided with two circular cavities, one on either side, similar to those
on the outer case, but being of smaller circumference; the inner disc
is made solid. I place a metal screw of a suitable length through the
bottom plate of such outer case, such screw passing through the smaller
internal case, which is provided in its interior with a female screw to
enable it to move up and down, as hereafter explained. By revolving
the screw it causes the centre case to gradually descend, and thereby
the orifice in the larger case to be opened, and permits of the water or
other liquid flowing through in any desired quantity, and when the full
force of the water or other liquid is required by continuing to work the

page_text: screw the larger case is also caused to descend owing to its having a
metal connection secured to the lower part of the screw by a nut or
other suitable contrivance, which thus draws down the larger metal case
and opens the two orifices in the outer case to their full extent, whereby
the full volume of water is permitted to flow through unobstructed.
When it is desired to shut off the supply this may be done gradually and
easily by turning the screw in the reverse direction when the two
internal boxes or cases are caused to gradually rise, and thus diminish
the force of the water by degrees until it is thoroughly shut off.
My Invention is particularly applicable for use at waterworks and
other large establishments where a great pressure of water is required.
Having thus described the nature of my said Invention and the
manner of performing the same, I would have it understood that I claim,
the improvements in double slide box cocks, substantially as herein-
before described.
In witness whereof, I, the said Obadiah Packer, have hereunto set
my hand and seal, this Seventeenth day of February, in the year
of our Lord One thousand eight hundred and seventy-six.
OBADIAH PACKER. (L.S.)