Improvements in Valve Apparatus for Automatically Regulating the Supply of Oil to Oil-fired Steam Boilers.
Year: 1898

page_text: Improvements in Valve Apparatus for Automatically Regulating the
Supply of Oil to Oil-fired Steam Boilers.
I, HENRY SPURRIER, Junior, Manager for The Lancashire Steam Motor Com-
pany, Leyland, near Preston, in the County of Lancaster, do hereby declare the
nature of this invention to be as follows:-
This invention relates to improvements in valve apparatus for automatically
regulating the supply of oil to oil-fired, steam boilers. in carrying out
my said invention I mount upon one end of a suitable bracket or bent arm a
chamber having two divisions one on each side of a sheet metal diaphragm.
One side of the diaphragm is open to the steam from the boiler and
the other side presses against one end of a centrally disposed spindle which
passes into the interior of a valve box upon which the other end of the bracket
or bent arm is fastened the valve end of the spindle as distinguished from
the diaphragm end-operating a disc valve which moves nearer to or further
from its seating accordingly as the pressure of the steam on the diaphragm in-
creases or decreases. Thus the oil passing from the oil tank through the valve
orifice to the boiler furnace is admitted automatically in increasing quantity as
the steam pressure lowers and in decreasing quantity as the steam pressure
rises. I employ a coiled spring or springs for holding the valve spindle up to
the diaphragm.
Improvements in Valve Apparatus for Automatically Regulating the
Supply of Oil to Oil-fired Steam Boilers.
I, HENRY SPURRIER, Junior, Manager for The Lancashire Steam Motor Com-
pany, Leyland, near Preston, in the County of Lancaster, 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 improvements in valve apparatus for automatically
regulating the supply of oil to oil-fired steam boilers.
In carrying out my said invention I mount upon one end of a suitable bracket
or bent arm a chamber having two divisions one on each side of a sheet metal dia-
phragm. One side of the diaphragm is open to the steam from the boiler and
the other side presses against one end of a centrally disposed spindle which
passes into the interior of a valve box upon which the other end of the bracket
Prins 71

page_text: or bent arm is fastened, the valve end of the spindle--as distinguished from
the diaphragm end-óperating a disc valve which moves nearer to or further
from its seating accordingly as the pressure of the steam on the diaphragm in-
creases or decreases. Thus the oil passing from the oil tank through the valve
orifice to the boiler furnace is admitted automatically in increasing quantity as
the steam pressure lowers and in decreasing quantity as the steam pressure rises I em-
ploy a coiled spring or springs for holding the valve spindle up to the diaphragm.
The accompanying drawing shows partly in vertical section and partly in
elevation, apparatus for automatically regulating the supply of oil to oil fired
steam boilers according to this invention.
1 is a bracket or bent arm to the upper end of which is suitably fixed a
chamber 2 made in two flanged parts that are, bolted together with an interposed
corrugated or grooved sheet metal diaphragm 3 so as to form two compart-
ments 2 and 2b the upper of which is adapted to be connected by a branch 2
to the steam space of the boiler the supply of oil to the furnace of which is to be
controlled. To the lower end of the bracket or arm 1 is fixed a valve box 4 pro-
vided with a valve 5 for controlling the supply of oil to the boiler furnace.
Against a stud or projection 3 on the underside of the diaphragm 3 bears, under
the action of a coiled spring 3b, one end of a rod 6 the lower end of which extends
through a stuffing box 4" into the valve box 4 and terminates in proximity to
the valve 5. As will be seen the arrangement is such that the extent of opening
of the valve 5 will be controlled by the pressure of the boiler steam
acting upon the diaphragm 3, the valve opening to a greater extent when the
steam pressure falls below the normal and closing more or less when the steam
pressure exceeds the normal, thereby automatically increasing or decreasing the
supply of oil to the boiler furnace and enabling steam of nearly uniform pressure
to be produced.
To enable the apparatus to reduce the supply of oil, or to cut off the supply,
at various desired steam pressures the rod 6 may advantageously be made as
shown, in two parts to one of which is fixed, as by a lock nut 7 an adjustable
set screw 8, against which the other parts are held by a coiled spring 9, the
arrangement being such that the length of the combined rod can be readily
varied to suit requirements.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is:-
1. For automatically regulating the supply of oil to oil fired boilers, valve
apparatus comprising a chamber provided with a movable diaphragm one side
of which is subject to the pressure of steam from the boiler the supply of oil
to the furnace of which is to be regulated, and the other side of which acts
against one end of a spindle, the other end of which controls a valve for regu-
lating the supply of oil to the boiler furnace, the arrangement being such that
when the pressure of steam exceeds the normal the valve is more or less closed,
and when it falls below the normal the valve is caused to open to a greater
extent, substantially as herein described.
2. For automatically regulating the supply of oil to oil fired steam boilers,
valve apparatus constructed, arranged and operating substantially as described
and shown.