AN IMPROVED APPARATUS FOR PREVENTING FLUCTUATION OF GAS IN MAINS OR PIPES FROM WHICH GAS ENGINES ARE SUPPLIED
Year: 1883

page_text: LETTERS PATENT to Charles Grantley Beechey of the City of Liverpool,
"Engineer for an Invention of "AN IMPROVED APPARATUS FOR PREVENTING
FLUCTUATION OF GAS IN MAINS OR PIPES FROM WHICH GAS ENGINES ARE
SUPPLIED
"
PROVISIONAL SPECIFICATION left by the said Charles Grantley Beechey
at the Office of the Commissioners of Patents on the 17th February 1883.
CHARLES GRANTLEY BEECHEY of the City of Liverpool, Engineer,
" AN
IMPROVED APPARATUS FOR PREVENTING FLUCTUATION OF GAS IN MAINS OR PIPES
FROM WHICH GAS ENGINES ARE SUPPLIED
"
Gas engines when at work produce an objectionable fluctuation or unsteadiness
of the gas in the mains or supply pipes; this is chiefly due to repeated inflation or
expansion and recoil or contraction of the india rubber bag or equivalent device
which is employed as a sort of reservoir or gas holder between the main or supply
pipe and the gas inlet of the engine.
Now the object of my improved apparatus is to prevent this fluctuation.
My apparatus is constructed as follows:-Upon the pipe which leads from the
main or supply pipe to the india rubber bag or equivalent device I place a chamber
in which is a flexible diaphragm sufficiently loose to rise and fall as hereinafter
explained or a floating holder. To this diaphragm is attached a spindle which_by
means of a lever or otherwise is connected with the gas-inlet valve. The chamber
above described communicates with the gas supply pipe by means of a small hole-
only and this hole may be a clearance space around the spindle above mentioned.
The
gas pressure. between the valve and the engine is always varying and the
diaphragm would be considerably acted upon and moved by the varying pressures
if the chamber had-free or full communication with the pipe, but as the only
communication is the small hole above described the pressure upon the diaphragm-
is practically constant, or more correctly speaking it is at the average, pressure
between the maximum and minimum pressure between the valve and the bag.
1.

page_text: The valve is thus kept open to one uniform degree and a constant or uniform
stream of gas flows past it. The apparatus is adjusted by a weight so that the
pressure in the bag is reduced to a minimum or only just enough to work the
diaphragm. When the engine requires more gas the pressure in the bag and under
the diaphragm will fall, the diaphragm will therefore fall a little and open the 5
valve to a corresponding extent.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Charles Grantley Beechey in the Great Seal Patent Office on the
17th August 1883.
"AN 1
CHARLES GRANTLEY BEECHEY of the City of Liverpool Engineer
IMPROVED APPARATUS FOR PREVENTING FLUCTUATION OF GAS IN MAINS OR PIPES
FROM WHICH GAS ENGINES ARE SUPPLIED
"
Gas engines when at work-produce an objectionable fluctuation or unsteadiness
of the gas in the mains or supply pipes; this is chiefly due to repeated inflation
or expansion and recoil or contraction of the india rubber bag or equivalent device:]
which is employed as a sort of reservoir or gasholder between the main or supply
pipe and the gas inlet of the engine.
Now the object of my improved apparatus is to prevent this fluctuation.
My apparatus is constructed as follows:-Upon the pipe which leads from the
main or supply pipe to the india rubber bag or equivalent device I place a chamber
in which is a flexible diaphragm sufficiently loose to rise and fall as hereinafter
explained, or a floating holder. To this diaphragm (or to the floating holder) is
attached a spindle which by means of a lever or otherwise is connected with the
gas inlet valve. The chamber above described communicates with the gas supply
pipe by means of a small hole only and this hole may be a clearance space around
the spindle above mentioned. The gas pressure between the valve and the engine
is always varying and the diaphragm would be considerably acted upon and moved
by the varying pressures if the chamber had free or full communication with the
pipe, but as the only communication is the small hole above described the pressure
upon the diaphragm is practically constant, or more correctly speaking, it is at the
average pressure between the maximum and minimum pressure between the valve
and the bag. The valve is thus kept open to one uniform degree and a constant
or uniform stream of gas flows past it. The apparatus is adjusted by a weight 60
that the pressure in the bag is reduced to a minimum or only just enough to work
the diaphragm. When the engine requires more gas the pressure in the bag and
under the diaphragm will fall, the diaphragm will therefore fall a little and open
the valve to a corresponding extent.
The accompanying drawing is a longitudinal section of an apparatus constructed
according to my invention. A A is the pipe which leads from the main or supply
pipe to the india-rubber bag or equivalent device. B is a chamber upon this pipe ;
O is a flexible diaphragm in the chamber B. D is a spindle attached to the
diaphragm O. E is a lever connecting the spindle D with the rod F of the gas

page_text: inlet valve G. H is a small hole forming a communication between the gas supply
pipe A and the chamber B below the diaphragm O; or instead of the small hole H
for forming this communication there may be a slight clearance space around the
spindle D as seen at I. K is a weight on the lever E for the purpose of adjusting
the apparatus. L is a frictionless leather seal to prevent escape of gas at the valve
rod F. The action of the apparatus shown in the figure will be fully understood
from the explanation already herein before given. The area of the hole H or of
the clearance space I should be only about 700th part of the area of the
diaphragm O,
Having now described the nature of my said invention and in what manner the
same is to be performed I declare that I claim :-
The apparatus arranged and acting substantially as hereinbefore described and
represented in the accompanying drawing for preventing fluctuation of gas in
mains or pipes from which gas engines are supplied.
In witness whereof I the said Charles Grantley Beechey have hereunto set
my hand and seal this thirteenth day of August One thousand eight hundred
and eighty three.