Improvements in Station Gas Governors.
Year: 1892

page_text: Date of Application, 10th June, 1892
Complete Specification Left, 9th Mar., 1893-Accepted, 15th Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in Station Gas Governors.
We JOHN HAWKYARD of Shaws Lane Upper Mill, Saddleworth in the
County of York Foreman and JOSEPH BRADDOCK of 72 Windsor Road Oldham
in the County of Lancaster Gas Engineer do hereby declare the nature of
this invention to be as follows:-
The objects of these improvements are to produce a station gas governor that
will automatically give an increased outlet pressure whenever the demand for gas
increases and a diminished outlet pressure as the demand for gas falls, such increase
or decrease being constant notwithstanding variations of inlet pressure, and also to
prevent a fluctuating or oscillating outlet pressure when very small quantities of
gas are required.
According to our invention we employ a loading tank fixed upon the crown
of the governor bell, and containing water or other liquid, and we so arrange
the supply and overflow of this tank that the height of the water or other liquid
therein shall increase automatically as the demand for gas increases and decrease
as the said demand falls, and in order to compensate for the effect of a varying
inlet pressure, which would alter the position of the valve for the same quantity
of gas passing through the governor, we employ a bell and float working in a
liquid and varying in height, to any desired degree, with the variation of the
inlet pressure.
On the top of this bell we place a filling and overflow vessel, connected to the
loading tank above named by a flexible pipe, or other equivalent means, so that
the level of the water or other liquid will be the same in both the filling and
overflow vessel and the loading tank. The filling and overflow vessel may be of
the same capacity as the loading tank, or to avoid making it so large a constant
supply of water may be given to this vessel which is provided with a suitable
overflow tube or brass to carry off surplus liquid.
When the governor is loaded to give the maximum outlet pressure, and the
valve is full open, the level of the water or liquid in the loading tank will be at
its highest point, and as the inlet pressure increases from any cause, the tendency
of the governor bell is to rise, and partially close the valve, and thus throw off some
of the liquid from the loading tank into the filling and overflow vessel and reduce
the outlet pressure, but the bell and float subjected to the inlet pressure rises to
the same extent carrying up the filling and overflow vessel and maintaining the
original level of water or other liquid in the loading tank and thereby maintaining
the maximum outlet pressure.
This arrangement is applicable with special advantage to governors made
according to an invention for which Letters Patent No. 16065 dated October 10th
A.D. 1890 were granted to us.
It is also applicable to governors where the bell is weighted, or gives the
maximum pressure, and the loading or pressure changing tank is fixed as a counter-
balance; and it is applicable also to governors with internal floats.
In order to prevent fluctuation or oscillation of the outlet pressure when very
small quantities of gas are passing through the governor, we employ a small
bye-pass governor capable of supplying as much gas as the large or principal
governor would pass when its valve is at its minimum safe distance from the
seating, or, in other words, the least quantity of gas the large governor will
safely pass without oscillating or "hunting."
We propose to use the small governor for controlling the outlet pressure when
only small quantities of gas are required, as already stated, the large governor

page_text: being meanwhile out of action; but when the quantity of gas required exceeds
the capacity of the small governor, the large governor is automatically put in
action and the small governor is put out of action, until the quantity of gas passing
again falls to the fixed amount, when the small governor is automatically put in
action and the large governor is shut off, as before.
This is accomplished as follows:-When the large governor is at rest and the
small governor has almost reached its maximum quantity of gas, it is made to
automatically actuate suitable mechanism for adding weight, by means of water or
other liquid, upon the crown of the bell of the large governor, (or, which amounts
to the same thing, taking weight off the counterbalance) thereby bringing the
latter into action and at the same time discharging water or other liquid from
its own loading tank and closing or putting itself out of action..
Conversely, when the small governor is at rest and is required to act, the large
governor on approaching its minimum quantity, is made to actuate the same or
similar suitable mechanism for discharging its own loading water or liquid so as to
put itself out of action and at the same time for supplying the necessary loading
to bring the small governor into action.
Or the large governor alone may be operated by the aforesaid mechanism for
loading and unloading so as to put it in or out of action, the small governor being
adjusted to give a slightly less pressure than the minimum pressure of the large
governor. The action is then as follows:-
On the large governor approaching its minimum quantity, it operates the
mechanism which discharges its loading liquid, and by that means begins to
close but as soon as the outlet pressure has fallen to that which the small
governor is set to give, the latter comes into action without outside help and
maintains its own outlet pressure until it has almost reached its maximum
quantity, when it operates the mechanism which loads and puts into action the
large governor, and the latter giving a greater minimum outlet pressure causes
the small governor to back up' and close.
6
The rapidity of all these changes above-named can be regulated by varying
the rate of flow of the water or fluid.
6
We would remark in conclusion that, though we have described the above
improvements as applied to the same governor, it will be evident that the
automatic pressure regulating device first described may be employed without the
byepass governor'.and the latter may be applied independently of the former.
Dated this 9th day of June 1892.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for Applicants.
COMPLETE SPECIFICATION.
Improvements in Station Gas Governors.
We JOHN HAWKYARD of Shaws Lane Upper Mill Saddleworth in the County
of York Foreman, and JOSEPH BRADDOCK of 72 Windsor Road Oldham in the
County of Lancaster, Gas Engineer, do hereby declare the nature of this invention
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
The objects of these improvements are to produce a station gas governor that
will automatically give an increased outlet pressure whenever the demand for gas
increases and a diminished ontlet pressure as the demand for gas falls, such increase
or decrease being constant notwithstanding variations of inlet pressure.
In order that our invention may be clearly understood we have annexed hereto
a sheet of drawings and have marked the same with figs. and letters of reference
corresponding with those in the following description.
Fig. 1 is an elevation shewing our present invention applied to a station gas
governor constructed according to an invention for which we obtained Letters

page_text: Patent in Great Britain No. 10000 dated October Ton as OU CHOO
is specially applicable to such governors.
Figs. 2, 3 and 4 show detached details and a modification hereafter more specially
referred to.
According to our invention we employ a loading tank a shewn half in section on
Fig. 1 fixed upon the crown of the governor bell b and containing water or other
liquid, and we so arrange the supply and overflow of this tank a that the height of
the water or other liquid therein shall increase automatically as the demand for gas
increases and decrease as the said demand falls, and in order to compensate for the
effect of a varying inlet pressure, which would alter the position of the valve for
the same quantity of gas passing through the governor we employ a bell cand
float d working in a tank e containing a liquid and varying in height, to any desired
degree, with the variation of the inlet pressure.
On the top of this bell and float we place a filling and overflow vessel f connected
to the loading tank a above named by a flexible pipe g or other equivalent means,
so that the level of the water or other liquid will be the same in both the filling
and overflow vesself and the loading or pressure changing tank a. A constant
supply of water may be given, as shewn on Fig. 1, to the vessel f which is provided
with a suitable overflow tube h or nozzle to carry off surplus liquid.
When the governor is loaded to give the maximum outlet pressure required and
the valve is correspondingly open, the level of the water or liquid in the loading
tank a will be at its highest point requisite to give such pressure and as the inlet
pressure increases from any cause, the tendency of the governor bell b is to rise,
and partially close the valve, and thus throw off some of the liquid from the
loading tank a into the filling or overflow vessel f and reduce the outlet pressure,
but the bell c attached to the float d and subjected to the inlet pressure by means
of the pipe i rises to the same extent carrying up the filling and overflow vessel f
and maintaining the original level of water or other liquid in the loading tank a
and thereby maintaining the maximum outlet pressure.
Fig. 2 is a vertical section and Fig. 3 a.horizontal section illustrating the bell
and float arrangement.
The float d rises and falls in the tank e which is provided with an overflow
at k, the float has attached to it the bell c.
The pipe is open above the water level and communicates to the inlet division
of the gas chamber A or it may communicate direct with the inlet main, so that
the inlet pressure is brought to bear upon the said bell c and through it and the
float d upon the overflow vessel f.
We may here remark that the water or other liquid may be supplied either
direct to the vesself as shown, or to the loading or pressure changing tank a, and
that the latter may be provided with an overflow at m which is at the ordinary
maximum pressure level but if at any time it should be required to load the main
governor bell to a still higher pressure this can be done by raising the position of
the overflow m.
If at any time it is found desirable to alter the point at which the loading of the
main governor bell commences, this may be done by raising or lowering the
supply vesself upon its rod f*.
Instead of arranging the belle and float d as shown at Figs. 2 and 3 they may
be arranged in a concentric form as shown at Fig. 4 in which case the float d is
made of an annular section.
In cases where it may be more convenient to have the tank e placed somewhere
above the station governor the overflow vessel f instead of being supported by a
rod fx as shown may be suspended by a similar rod attached to the lower part of
the float d and passing out through a water seal.
This invention is as before stated applicable with special advantage to governors
made according to an invention for which Letters Patent No. 16065 dated
October 10th A.D. 1890 were granted to us.
It is also applicable to governors where the bell is weighted, or gives the

page_text: maximum pressure and the loading or pressure changing tank is fixed as a counter-
balance; but in this case the overflow chamber must of course be mounted on or
carried by a counterbalance lever or sway beam or be otherwise balanced to move
in the same way as the loading tank. The invention is applicable also to governors
with internal floats.
We would here remark that in our Provisional Specification we described means
for preventing fluctuation or oscillation of the outlet pressure when very small
quantities of gas are passing through the governor but since filing the said
Provisional Specification we have ascertained that the bye pass governor therein
described is not so useful as we anticipated; we do not therefore wish to make any
claim to such construction.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. In a station gas governor, the combination with a loading tank placed on the
crown of the main governor bell, of an overflow vessel connected to such tank by
a flexible pipe (or equivalent) so as to maintain an equal water level in both the
overflow vessel and loading tank, such vessel being supported by a rod or otherwise
attached to a float acting in a tank and provided with a bell in communication with
the inlet pressure substantially in the manner and for the purposes hereinbefore set
forth and illustrated by the drawings annexed.
2. In a station gas governor, the combination with a loading tank fixed as a
counterbalance as hereinbefore described of an overflow vessel connected to such
tank by a flexible pipe (or equivalent) so as to maintain an equal water level in
both the overflow vessel and loading tank, such vessel being connected to a float
acting in a tank and provided with a bell in communication with the inlet pressure
substantially in the manner and for the purposes hereinbefore set forth and
illustrated by the drawings annexed.
Tinted this 8th day of Mah 1902
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicants.