IMPROVEMENTS IN THE SEATINGS OR FACINGS OF GAS VALVES
Year: 1869

page_text: LETTERS PATENT to Barnard William Farey, Engineer, of the Firm
of B. Donkin & Company, of Bermondsey, in the County of
Surrey, for the Invention of "IMPROVEMENTS IN THE SEATINGS OR
FACINGS OF GAS VALVES."
Sealed the 30th July 1869, and dated the 23rd February 1869.
PROVISIONAL SPECIFICATION left by the said Barnard William Farey
at the Office of the Commissioners of Patents, with his Petition,
on the 23rd February 1869.
I, BARNARD WILLIAM FAREY, Engineer, of the Firm of B. Donkin
& Company, of Bermondsey, in the County of Surrey, do hereby
declare the nature of the said Invention for. "IMPROVEMENTS IN
SEATINGS OR FACINGS OF GAS VALVES," to be as follows:-
This Invention consists of certain improvements in gas valves, and
has for its object the prevention of any escape of gas between the
seatings or faces of the valve.

page_text: A
groove is formed in one or both of the seatings or faces of the valve,
into which groove is introduced by any suitable means water, oil, or
other fluids, which must be at a pressure exceeding that of the gas for
which the valve is employed to regulate or stop the flow. It will be
readily understood that should the seatings or faces of the valve not be
tight a leakage of water, oil, or other fluid will take place, thus
effectually preventing all escape of gas between these seatings or faces.
Any water, oil, or other fluid so leaking through can be taken off by
syphons, one on each side of the diaphragm or slide of the valve, or by
any other convenient method. Where gas valves are used to divide pure
from impure gas, pure gas may be used as a lute instead of a liquid, the
object in keeping valves perfectly tight in this case being to prevent any
flow whatever of impure into pure gas. While the valve is open the
flow of water, oil, or gas into the groove is of course stopped either by
self-acting means within the valve or by any ordinary method.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Barnard William Farey in the Great Seal Patent
Office on the 21st August 1869.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, BARNARD
WILLIAM FAREY, Engineer, of the Firm of B. Donkin and Company, of
Bermondsey, in the County of Surrey, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-third day of February, in the
year of our Lord One thousand eight hundred and sixty-nine, in the
thirty-second year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Barnard William Farey, Her
special licence, that I, the said Barnard William Farey, my executors,
administrators, and assigns, or such others as I, the said Barnard William
Farey, 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 SEATINGS OR FACINGS OF GAS VALVES," upon the con-
dition (amongst others) that I, the said Barnard William Farey, my

page_text: 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 Barnard William Farcy, 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:-
:
This Invention consists of certain improvements in gas valves, and
has for its object the prevention of any escape of gas between the.
seatings or faces of the valve.
A groove is formed in one or both of the seatings or faces of
the valve, into which groove is introduced by any suitable means
water, oil, or other fluids, which must be at a pressure exceeding
that of the gas for which the valve is employed to regulate or stop
the flow. It will be readily understood that should the seatings or
faces of the valve not be tight a leakage of water, oil, or other fluid will.
take place, thus effectually preventing all escape of gas between the
seatings or faces. Any water, or oil, or other fluid so leaking through can
be taken off by syphons, one on each side of the diaphragm or slide of.
the valve, or by any other convenient method. When gas valves are
used to divide pure from impure gas, pure gas at a greater or lesser
pressure than that of the gas in the pipes may be used as a-lute instead
of a liquid, when at a greater pressure being supplied from a gasometer,
when at a lesser pressure the pure and impure gas from the pipes
leaking into a gasometer, the object in keeping valves perfectly tight in
this case being to prevent any flow whatever of impure into pure gas.
While the valve is open the flow of water, oil, or gas into the groove is
of course stopped either by self-acting means within the valve or by any
ordinary method.
And in order that my Invention may be the more fully understood
and the more readily carried into effect, I have represented in the
Drawing hereunto annexed an adaptation of my Invention to one of
Messrs. B. Doukin and Company's "Improved Gas Valves," though
I do not confine myself to any such adaptation.

page_text: DESCRIPTION OF THE DRAWING..
The accompanying Drawing shows one of Messrs. B. Donkin and
Company's gas valves in section to which my Invention is applied. A
groove A is formed in the diaphragm or slide B of the valve, into which
groove water, oil, or other fluid is introduced by means of the pipe C at
a pressure exceeding that of the gas. Any leakage which arises, which
is of necessity a leakage of water, flows into the recesses D, D, one on
either side of the diaphragm of the valve, whence it is taken off by
means of the syphons E, E. The cock F is of course closed when the
valve is open, open when the valve is closed.
Having thus described the nature of my said Invention, and the
manner in which it is to be performed, I would have it understood that
what I claim is, the construction and application of the lute joint to gas
valves in the manner herein-before described and shown.
In witness whereof, I, the said Barnard William Farcy, have
hereunto set my hand and seal, this Twentieth day of August
A.D. 1869.
Witness,
JOSEPH WALTON.
BARNARD WILLIAM FAREY. (L.S.)