Improvements connected with Gas Governors.
Year: 1889

page_text: Date of Application, 10th Aug., 1889
Complete Specification Left, 26th Apr, 1890-Accepted, 21st June, 1890
PROVISIONAL SPECIFICATION.
Improvements connected with Gas Governors.
I, JAMES STOTT, of 174 Fleet Street, County of London, Gas Engineer, do hereby
declare the nature of this invention to be as follows:-
This invention relates to a method of supporting the mercury bason and for
securing it in place, the object being to facilitate easy removal of the parts for
readjustment of the valves for cleaning the interior, or for repairs.
According to the usual construction of basons which contain the mercury, the
rim of the bason fits the casing somewhat loosely, and to secure it in position white
or red lead has been first smeared on the "inner step" and the bason pressed down
upon it as a bedding, other portions of such lead being forced into the space
between the bason and the wall of the casing to fix the bason firmly in place in a gas
tight manner. The lead in a short period becomes very hard and set producing
great difficulty of removal and in nearly every case a breakage of the bason, if of
pottery or of cast metal, or of excessive damage, such as fracture if of a soft
metal.
By my present improvements the above disadvantages are overcome.
For the purpose of my present invention, I make the wall of the bason of nearly
the depth as that of the casing from the flange to the inner step and provide a flange
on the top edge to rest upon the casing flange and I pack the space between the
bottom of the Bason and of the inner step with an elastic or compressible ring, or it
may be cement, or a mastic, this being compressed to perfect the seam for preventing
passage of mercury and of gas up between the bason and casing.
The screwing down of the bason flange upon the flange of the casing is preferably
independent of the screws which secures the cover in place.
A further improvement relates to fixing the valve box in a Gas Governor, and for
this purpose 1 form ribs in the corners of the box with a hole through each for the
reception of long screw pins, the threaded portion taking into the partition, on
which the box rests and with the screw heads above the box.
Dated this 10th dor of Ane 1880
H. GARDNER,
166, Fleet Street, London, Agent for the said James Stott.
COMPLETE SPECIFICATION.
Improvements connected with Gas Governors...
I, JAMES STOTT, of 174 Fleet Street, City of London, 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:-
This invention relates to a method of supporting the mercury bason and for
securing it in place, the object being to facilitate easy removal of the parts for
readjustment of the valves for cleaning the interior, or for repairs.
According to the usual construction of basons which contain the mercury, the rim
of the bason fits the casing somewhat loosely, and to secure it in position white or
red lead has been first smeared on the "inner step" and the bason pressed down
upon it as a bedding, other portions of such lead being forced into the space between
the bason and the wall of the casing to fix the bason firmly in place in a gas tight
manner. The lead in a short period becomes very hard and set, producing great
difficulty of removal and in-nearly every case a breakage of the bason, if of

page_text: pottery, or of cast metal, or an excessive damage, such as a fracture, if of a soft
metal.
By my present improvements, the above disadvantages are overcome.
For the purpose of my present invention, I make the wall of the bason of nearly
the depth as that of the casing from the flange to the inner step and provide a flange
on the top edge to rest upon the casing flange and 1 pack the space between the
bottom of the bason and of the inner step with an elastic or compressible ring, or it
may be cement, or a mastic, this being compressed to perfect the seam for
preventing passage of mercury and of gas up between the bason and casing.
The screwing down of the bason flange upon the flange of the casing is preferably
independent of the screws which secures the cover in place.
A further improvement relates to fixing the valve box in a Gas Governor, and for
this purpose I form ribs in the corners of the valve box with a hole through each for
the reception of long screw pins, the threaded portion taking into the base or
partition, on which the box rests and with the screw heads above the box.
My invention will be clearly understood by Sheet 1 of the annexed drawings in
which I show the several parts of a Gas Governor separately except that the valve
box and valves are in their working positions in the outer casing.
A is the casing provided with the usual gas entry and exit ports at the lower
part. This casing has upon the inner step B an india rubber, or other ring C as a
packing or cushion on which the bottom D of the mercury cup E finds a seating
when inserted into the casing A and pressed down upon the ring C to prevent
passage of gas into the space between the walls of the casing A and cup E.
The outer wall of the mercury cup E from F to G corresponds in height with the
wall of the casing from the step B to the top edge G and terminates in a projecting
flange H which sits upon the top rim I of the casing A upon which it is fastened by
countersunk headed screws.
The tapered wall J of the mercury cup terminates about half way up the casing A
and has on its inside a couple of lugs K, K, to enable the shield L to be fastened
down upon it by short screws. This shield L when in place provents the mercury
flowing into the lower well. M should the apparatus be tilted to too great an
angle.
N is a bell which dips in the mercury in the bason P and is, and also the
valves QQ, to the spindle R to which they are attached, buoyed up by the pressure
of gas which passes through the apparatus in a well known manner for governing
purposes.
Sis the cover which can be screwed down upon the flange H, the screws being
inserted into separate holes to the flange screws and engaging in the top rim I.
T is the valve box and at its two corners U, U, holes are formed through them for
the passage of long screw pins V, V, and engage in the base W of the casing A to
fix the valve box T in position, the heads X, X, of the screw pins being above the
box.
By this arrangement of the several movable parts of the apparatus termed a Gas
Governor, the interior can be easily inspected without interfering with the joints by
which the casing A is secured to the gas supply pipes. By first removing the
cover S, the bell N can be released from the spindle R, the cup E is next unfastened
and raised out of the casing, the screw pins V, V, taken out, and also the valve
box T. Should however the valves alone require attention, it will not be necessary to
remove the cup, but only the cover S bell N and shield, L and the screw pins V,,V,
the aperture in top of the tapered wall J being sufficient between the lugs for the
valve box. T to pass through..
Sheet 2 shows the apparatus in section with all the parts in their respective positions
when the Governor is in operation.
The bell N is kept in balance by the pressure of the gas under the resistance of, the
weights Y in a manner well known.
Zis. a lip on the bottom edge. of the bell N. to offer. an impediment to its rapid
rising should the supply of gas be suddenly turned on..

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
1. In a Mercurial Gas Governor, the high walled cup E, flange H, compressible
seating ring C and the method of securing said cup in position, as described.
2. In a Mercurial Gas Governor, constructing the valve box with corner pieces
having holes for screw pins V, V, which engage in the base of the casing, as
described.
3. In a Mercurial Gas Governor, the means above referred to for enabling an
inspection of the several internal parts without necessitating the removal of the casing
from the gas supply pipes.
The 26th dow of Anil 1900
H. GARDNER,
Patent Agent, 166, Fleet Street, London, Agent for the said James Stott.