Improvements in Automatically Varying the Load and Pressure of Gas Governors, and in the Means or Apparatus employed therefor.
Year: 1892

page_text: The decision of the Comptroller-General, of the 13th day of April 1893, allowed,
under Section 18 of the Patents, &c. Act, 1883, an Amendment of this
Specification.
Date of Application, 21st Oct., 1892-Accented, 17th Dec., 1892
COMPLETE SPECIFICATION (AMENDED).
Improvements in Automatically Varying the Load and Pressure of
Gas Governors, and in the Means or Apparatus employed
therefor.
I, WILLIAM COWAN of Buccleuch Street Works, Edinburgh in the County of
Midlothian, North Britian, Gas Meter Manufacturer, 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 :-
This invention which relates to improvements in automatically varying the load
and pressure of gas governors and in the means or apparatus employed therefor,
forms additions to or modifications of the invention described in my former applica-
tion for Patent No. 9829 of 24th May 1892, and consists firstly of employing a
valve arrangement in lieu of the flexible tube arrangement for loading and unloading
the governor bell; and secondly of employing a system of electro magnets and
conductors in lieu of the pressure pipe from the remote district main so as to
enable the pressure in such main to automatically regulate the load on the governor
bell as required.
But in order that my present invention may be readily understood and easily
carried into effect I will proceed to describe the same with reference to the annexed
explanatory sheets of drawings throughout which the same reference letters denote
similar parts.
Figure 1 is an elevation shown partly in section of my improved arrangement of
valves.
Figures 2 and 3 are sectional elevation and plan of a valve that I prefer to
employ. And
Figure 4 is an elevation of my system of electro magnets and conductors.
In carrying out my invention with regard to the valve arrangement for loading
and unloading the tank A of the governor bell B, I proceed as is shown in Figure 1,
that is to say, I provide the supply pipe C which leads the water, or other suitable
liquid, from the cistern D to the loading tank A of the governor, with a valve or
cock E preferably formed as shown in Figures 2 and 3; the said valve E, is
provided with a weighted actuating lever e, the one end of which passes through a
slot or opening f formed in the top end of a vertical pillar or rod F which is
mounted on the top of the auxiliary gas holder bell G which is acted upon by
the pressure of gas in the remote district of the main by means of the pressure
pipe S.
The unloading or discharge syphon pipe J is also connected by means of piping J
with another valve K the lever k of which also works in a slot or opening f¹ formed
near the lower end of the pillar or rod F. The said slots f, and fi are of sufficient
lengths as to enable the bell G to take on or give off the variable weights L before
actuating any of the valves E and K. The whole arrangement thus forms an
efficient working apparatus for loading and unloading the governor the load of
which is automatically varied according to the requirements of the district, through
the medium of the přessure at the remote district actuating the gas holder bell G

page_text: and so operating one or other of the valves E and K. Also in this arrangement I
dispense with the use of an auxiliary small gas holder on the bell of the governor
or with the use of an auxiliary cistern, for unloading the tank of governor.
In carrying out my invention as regards the system of electro magnets and con-
ductors, proceed as is shown in Figure 4, that is to say I remove the auxiliary
gas holder to the remote district and connect it to the main by means of a short
length of pipe M, thus dispensing with the length of pressure piping that would be
necessary were the gas holder placed alongside the governor,
In order to enable the rise and fall of the gas holder bell G in the remote district
to actuate the supply and discharge pipe valves E and K of the governor I provide
a system of electro magnets N, conductors. 1', contact makers Q and battery or
dynamo R as shown. The said magnets N are caused to open or shut the
valves E and K on the completion or the interruption of a circuit being established
or broken through the one or other of the contact makers Q coming into or going out
of action as the gas holder bell G rises or falls according to the demand in the
remote district. The bell G of the gas holder may be provided with a variable
weight arrangement as hitherto and which weight it would either take on or give off*
before any of the contact makers Q came into action. The valves E and K àre
preferably of the same kind as shown in Figures 2 and 3.
This system of electro magnets and conductors may also be employed for actuating
the flexible tube arrangement for loading and unloading the governor as described
in my application No. 9829 of 1892, hereinbefore referred to, suitably proportioned
double armed levers lying being employed so as to enable the necessary travel of
the tubes to be effected.
It will thus be seen that in either of the foregoing arrangements, the loading and
unloading of the governor will be entirely dependent on the actual pressure of
the gas in the main of the remote district, and that should alteration of pressure
take place the governor will be automatically loaded or unloaded as required to
meet such alteration.
Having now particularly described and ascertained the nature of my said iiven-
tion and in what manner the same is to be perforined I declare that what I
claim is :-
1st. In the loading and unloading of gas governors, the supply and discharge
valves actuated by the pressure of the gas in a remote district of the main through
the medium of a pressure pipe and auxiliary gas holder, substantially as herein-
before described and shown in Figure 1 of the drawings.
2nd. In the loading and unloading of gas governors, the system of electro
magnets and conductors whereby on the pressure of gas in the main of.a. remote
district changing, the rise or fall of the bell of the auxiliary gas holder completes
or breaks a circuit and so actuates the supply or discharge valve of the governor,
substantially as herein before described and shown in Figure 4 of the drawings.
3rd. In the loading: and unloading of gas governors, the system of electro
magnets and conductors whereby on the pressure of gas in the main of a remote
district changing; the rise or fall of the bell of the auxiliary gas holder completes
or breaks a circuit and so actuates the flexible tube arrangement through the
medium of suitable levers, substantially as herein before described.
Dated this 20th day of fiatalon 1905
JOHNSONS,
115, St. Vincent Street, Glasgow, Applicant's Agents.