AN IMPROVED GAS-REGULATOR
Year: 1883

page_text: LETTERS PATENT to Herbert John Haddan, of Kensington, Middlesex for an
Invention of AN IMPROVED GAS-REGULATOR a communication to him from
abroad by Johannes Fleischer, of Cologne, in the German Empire
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at the
Office of the Commissioners of Patents on the 9th April 1883.
HERBERT JOHN HADDAN, of Kensington, Middlesex, "AN IMPROVED GAS-
REGULATOR," a communication to me from abroad by Johannes Fleischer, of
Cologne, in the German Empire,"
This invention relates to that class of gas-pressure-governors, which act by the
pressure of the gas on one side of a movable diaphragm.
I hold the centre or the flexible diaphragm between two thin metal plates to
which is attached a post hinged at its opposite end to the joint of a pair of levers
which form a variable angle with each other.
One of these levers pivots on a bracket fixed to the governor-casing, while the
other lever is hinged to a swing bar or other movable part which controls the gas
inlet and is acted upon by a spring, the arrangement of the different pieces of
mechanism being such that the pressure of the gas tends to increase the angle
between the two levers and thereby to close the gas inlet-valve, while the spring
tends to open the same.
The casing, to which the flexible diaphragm forms a hermetically closing cover
has a gas inlet pipe and a gas outlet pipe.
The diaphragm is protected by a metallic ring provided with a glass-disc or by
any other suitable guard.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Herbert John Haddan in the Great Seal Patent Office on the
9th October 1883.
HERBERT JOHN HADDAN, of Kensington, Middlesex, "AN IMPROVED GAS-
REGULATOR," a communication to me from abroad by Johannes Fleischer, of
Cologne, in the Gerinan Empire,
This invention relates to gas pressure regulators.
In the following description reference will be had to the accompanying drawings,
of which Figs 1 and 3 represent vertical sections at right angles to each other,
while Fig 2 represents a plan. . Figs 4 and 5 represent a modification of the
arrangement shown in Fig 1 and 3.
The apparatus is provided with a valve which controls the gas-inlet, and with
an angle-lever mechanism, adjustable from the outside and arranged either as
represented in Fig 3 or as in Figs 4 and 5, both arrangements operating with
identical effect..
The apparatus comprises a round metal casing A with bottom B and flange C
cast in one piece. Screwed on the flange C is the ring D, and the diaphragm E
provided with an indiarubber rim is held between the flange C and ring D so as
to close the whole circumference of the casing; b and c are two metal plates which
hold the central portion of the diaphragin between them, and are rigidly connected
with the post F. The post F is hinged at d to the angle-levers or rods G and H
forming a knee-joint.
The other ends of these levers are pivoted at e to an inside bracket e¹ of the
casing A, and at f to the regulating lever K, which lever has its fulcrum at h.
The helical regulating spring n provided with a drawhook is hooked to the
valve lever K in such a nanner, that it tends to remove the latter from the
gas-inlet . This gas-inlet is the end of the cylindrical bore i which may have
about two millimetres diameter.
The valve may either be attached to the lever K, or formned by a facing of the
lever, the latter case being shown by the drawing. The rod X is guided
at and y.
The tension of the helical spring can be regulated by the adjusting nut p.
Instead of one helical spring (n), two or more springs may be applied and
suitably connected.
P is the gas-outlet connected with the pipes leading to the burners, while at R
the regulator is connected to the pipes leading to the reservoir filled with gas
compressed to about six atmospheres. V is a guard plate for the diaphragm,
and W a guard plate for V.
Air holes are provided in the guard plates for admitting the atmospheric pressure
to the diaphragm.
The apparatus works in the following manner.
Under normal working pressure in the interior of the casing A the diaphragm
occupies a middle position and places the valve K by means of the post F and the
angle-lever G-H in such a position relatively to the pipe i, that the quantity of
compressed gas entering at k is equal to the quantity of expanded gas escaping
at P. In this position the helical spring n balances the pressure on the diaphragm.
If the discharge of lighting gas at P is reduced the pressure of the gas in the
interior of the casing increases, the diaphragm E is pressed further upwards, the
angle-lover is stretched by means of the post F, aud the tube i is closed until the
diaphragm again occupies its normal position, in consequence of the restoration of
the normal pressure in the casing A.

page_text: By continued consumption of gas, the pressure in the pipes leading from P
ecreases, and therefore also the pressure in the interior of the casing A. As
on as the decrease commences the diaphragm recedes, the helical spring n
emoves the valve K from the inlet tube i, and according to the decrease of
ressure, a greater quantity of gas enters the casing and reestablishes the normal
ressure.
In the arrangement represented by Fig 4 and 5 (Fig 5 being a cross section
long line a-B of Fig 4) the rod F¹ attached to the diaphragm is rigidly
onnected with the valve lever K¹ and the regulating lever r. The whole of these
vers have one centre of motion o¹.
The rod Z' provided at 8 with a disc is situated in the interior of the helical
pring n and passes through an aperture in the regulating lever r.
The rod is guided at x' and y².
The tension of the spring is suitably regulated by means of an adjusting nut.
he working of this arrangement will be easily understood after the above
escription.
The object of this invention is to avoid all dead motion between the diaphragm
nd the valve.
What I claim is:-
A gas pressure regulator comprising in its construction a casing A, with gas
inlet and outlet, cover D, diaphragm E exposed to the gas pressure and
provided with washers or strengthening plates c, b, a valve lever K, means
for transmitting the motion of the diaphragm to the valve lever, and an
adjustable spring n, adapted to draw the valve lever away from the gas-inlet,
substantially as described.
In gas pressure regulators the combination of a gas chamber provided with inlet
and outlet, with a flexible diaphragm exposed to the gas pressure and provided
with washers or strengthening plates, a lever adapted to control the adinission
of gas, a post attached at one end to the diaphragm, a pair of rods hinged to
the free end of the post so as to form a knee-joint, one of the said rods being
pivoted with its other end to a fixed bracket, while the other rod is pivoted to
the lever which acts on the gas inlet, and an adjustable spring connected with
the said lever so as to close the gas inlet, substantially as described.
In witness whereof I the said Herbert John Haddan have hereunto set iny
and and seal this 9th day of October A.D. 1883.
TT T