Improvements in Regulators for Controlling the Supply of Oil to the Oil Burners of Steam Boiler and like Furnaces.
Year: 1899

page_text: Date of Application, 2nd May, 1899
Complete Specification Left, 2nd Mar., 1900 -Accepted, 2nd May, 1900
Improvements in Regulators for Controlling the Supply of Oil to the
Oil Burners of Steam Boiler and like Furnaces.
We, THOMAS COULTHARD, JOHN HENRY TOULMIN, THOMAS COULTHARD, Junior.
and WILLIAM NORRIS, all of the Firm of T. Coulthard & Co., Cooper Road,
Preston, in the County of Lancaster, do hereby declare the nature of this inven-
tion to be as follows:-
Our invention relates to improvements in oil regulators for use upon the oil
supply valve which controls the supply of oil to the burners of oil burning boiler
and like furnaces and the object being to provide an efficient regulator whereby
the delivery of the oil can be regulated by the steam pressure generated in the
boiler to which the burner is attached, the regulator being capable of motion
and free to work in a sensitive manner.
In carrying our invention inte effect when constructing a regulator for con-
trolling the supply of oil or vapour to a liquid fuel burner attached to a furnace
or boiler, we provide any ordinary valve through which the liquid fuel or vapour
shall pass to the vapouriser or combustion chamber of the boiler or furnace, and
we dispense with any positive or direct connection between such valve and
the regulator employing the well known diaphragm with a central boss or stud
projection thereon for determining the rise of the valve from its seat in the
casting or casing of our valve chamber.
We suspend the diaphragm between annular flanges formed on or secured to
our casing in such a position that the central stud can be depressed by a project-
ing spindle carried from an upper boss-like chamber attached to our casing
bracket. Within this upper chamber we introduce a sleeve to carry a spring
which presses at one end against the collar of a gland which secures the spindle
in position, and the upper end of the spring we make to act against the neck or
shouldered head of the valve spindle, the tension of the spring being adjusted
by the screwed neck gland or bush to suit the boiler pressure or load which
the steam is to overcome within the boiler before the oil supply is cut off.
To actuate the spindle by means of the excessive steam pressure generated
within the boiler we employ an upper diaphragm in a cup-like head formed upon
or secured to the spindle sleeve, the underside of the diaphragm being made with
a central pushing boss or stud, while the upper side is made to receive the steam
pressure from the steam branch which is connected thereto. Thus when the
steam pressure is such as to exceed the set tension of the spring below the
spindle head then the spindle is depressed and the valve is held upon its seat by
the lower diaphragm being depressed by the end of the spindle. There being no
stuffing packing or other tightening gland for the spindle to work through there
is a freedom of motion produced which ensures a sensitive working of the spindle

page_text: and an efficient regulation of the oil or vapour supply. When the steam pressure
drops due to the main supply of fuel being diminished the spring will raise the
spindle and the pressure of the oil will lift the valve from its seat. The amount
of vapour and oil in the vapouriser is sufficient to keep the burner alight until
the pressure has fallen sufficiently to allow of another charge of oil being intro-
duced to the vapouriser.
To enable a sufficient quantity of oil to pass the valve and enter the vapouriser
when the steam pressure is below the normal, we provide a grove or passage
upon the valve which acts as a pilot light or small burner.
We shut the oil supply off from the main casing by any ordinary stop valve.
We utilise the same double diaphragm and free spindle for controlling the
supply valve when a liquid or air column is made to act upon the upper diaphragm
instead of steam as. herein before described.
We modify the form of our casing and the arrangement of our spindle and
its bearings and diaphragms to suit the type of boiler, furnace or burner to which
the regulator is to be attached.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham,. and
25, Cross Street, Manchester, Agents..
Improvements in Regulators for Controlling the Supply of Oil to the
Oil Burners of Steam Boiler and like Furnaces.
. We,. THOMAS COULTHARD, JOHN HENRY TOULMIN, THOMAS COULTILARD, Junior,
and WILLIAM NORRIS, all of the Firm of T. Coulthard & Company, of Cooper Road,
Preston, in the County of Lancaster, Engineers, 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:-
Our invention relates to improvements in oil regulators for use upon the oil
supply valve which controls the supply of oil to the burners of oil burning boiler
and like furnaces, and the object being to provide an efficient regulator whereby
the delivery of the oil can be regulated by the steam pressure generated in the
boiler to which the burner is attached, the regulator being capable of motion
and free to work in a sensitive manner. Our invention consists in the means
hereinafter described for communicating to the regulating valve the movements
of a flexible diaphragm exposed to the varying pressure of steam or other fluid.
In the accompanying sheet of explanatory drawings Figure 1 is a sectional
elevation of one form of our improved regulator.
In carrying our invention into effect when constructing a regulator for con-
trolling the supply of oil or vapour to a liquid fuel burner attached to a furnace
or boiler, we provide any ordinary valve A through which the liquid fuel or
vapour shall pass to the vapouriser or combustion chamber of the boiler or
furnace, and we dispense with any positive or direct connection between such
valve and the regulator employing the well. known diaphragm B with a central
boss or stud projection C thereon for determining the rise of the valve from its
seat in the casting or casing of our valve chamber.
We suspend the diaphragm between annular flanges D. formed on or screwed
to our casing in such a position that the central stud C can be depressed by 'a

page_text: projecting spindle E carried from an upper boss like chamber F attached to our
casing bracket.
Within this upper chamber F we introduce a sleeve G to carry
a spring which presses at one end against the collar of a gland P which secures
the spindle E in position, and the upper end of the spring we make to act
against the neck or shouldered head E of the valve spindle, the tension of the
spring being adjusted by the screwed neck gland or bush 1, to suit the boiler
pressure or load which the steam is to overcome within the boiler before the oil
supply is cut off.
To actuate the spindle by means of the excessive steam pressure generated
within the boiler we employ an upper diaphragm K in a cup like head formed
upon or secured to the casing bracket, the underside of the diaphragm being
made with a central pushing boss or stud L, while the upper side is made to
receive the steam pressure from the steam branch M which is connected thereto.
Thus when the steam pressure is such as to exceed the set tension of the spring
below the spindle head then the spindle is depressed and the valve is held upon its
seat by the lower diaphragm being depressed by the end of the spindle, there
being no stuffing, packing or other tightening gland for the spindle to work
through there is a freedom of motion produced which ensures a sensitive
working of the spindle and an efficient regulation of the oil or vapour supply.
When the steam pressure drops due to the main supply of fuel being diminished
the spring will raise the spindle and the pressure of the oil will lift the valve
from its seat. The amount of vapour and oil in the vapourizer is sufficient to
keep the burner alight until the pressure has fallen sufficiently to allow of
another charge of oil being introduced to the vapourizer.
To enable a sufficient quantity of oil to pass the valve and enter the vapouriser
when the steam pressure is below the normal, we provide a groove or passage
upon the valve which acts as a pilot light or small burner.
We shut the oil supply off from the main casing by any ordinary stop valve.
We utilize the same double diaphragm and free spindle for controlling the
supply valve when a liquid or air column is made to act upon the upper
diaphragm instead of steam as herein before described.
We modify the form of our casing and the arrangement of our spindle and
its bearings and diaphragms to suit the type of boiler, furnace or burner to
which the regulator is to be attached.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we wish it to be
understood that we are aware that it is not novel to employ a flexible diaphragm
exposed to the varying pressure of steam or other fluid, and supported by an
adjustable spring, to operate a valve controlling the supply of oil to the burners
of a steam boiler or the like, and we make no general claim to such an arrange-
ment, but we declare that what we claim is:-
The improved regulator for controlling the supply of oil to the burners of a
steam or like boiler furnace, substantially as hereinbefore described and as
illustrated in the accompanying drawings.
TYL 1 1
// דני "
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester, Agents.