Improvements in Steam Boiler Water Level Regulating and Indicating Apparatus.
Year: 1889

page_text: Date of Application, 30th Oct., 1889
Complete Specification Left, 30th July, 1890-Accepted, 30th Aug., 1890
PROVISIONAL SPECIFICATION.
Improvements in Steam Boiler Water Level Regulating and
Indicating Apparatus.
JAMES MURRIE 45 West Nile Street Glasgow N.B. Engineer do hereby declare
the nature of this invention to be as follows :-
My said invention applies to an improvement in the apparatus for which a patent
was applied for dated 26th Octr. 1889 No. 16971. viz. Improvements in Steam Boiler
Water Level Regulating and Indicating Apparatus.
My present improvement consists in adapting the present mode of feeding hori-
zontal boilers to act as a self regulating feed valve, or to act when required simply as
a check valve fitted with the wheel valve spindle to regulate the lift of the check
valve.
My said improvement essentially consists in having an outside chamber or chest
fitted on the front of the boiler with a passage leading therefrom to the interior of the
boiler at or about the water level. In this external chamber is fitted the lever, one
end of which projects inside the boiler, the float being attached to the inside end. In
said chest a check valve is fitted on an inlet port to regulate the influx of water from
the feeding apparatus. The check valve has its lift regulated by the float lever which
passes through a slot in the check valve stem, said valve stem projects above the
lever, and has its lift further controlled when necessary by an ordinary wheel valve
spindle working through a stuffing gland in the upper side of the chest. By this
means the check valve may have its lift automatically regulated by the position of the
float lever, or the float lever may be rendered inoperative and the lift of check valve
would then be regulated by the ordinary wheel valve spindle.
Instead of the water passing into the boiler by the passage through which the float
lever works, there may be a second passage for the admission of the water preferably
at a lower level than the former.
The chest is further fitted with a whistle which is set in operation by the float lever
opening a spring or dead weight valve on the float continuing to fall below the
working level.
The float may be of any known form but it is made preferably hollow and loaded
with water or other liquid or solid, and a counterbalance weight added to the opposite
arm of the lever.
1000
COMPLETE SPECIFICATION.
Improvements in Steam Boiler Water Level Regulating and
Indicating Apparatus.
I, JAMES MURRIE, of Granville Street, Glasgow, in the County of Lanark, North
Britain, 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 :-
: My said invention applies to an improvement in the apparatus for which a Patent
was applied, dated 26th October, 1889, No. 16971, for "Improvements in Steam
Boiler Water Level Regulating and Indicating Apparatus."
My present improvement consists in adapting the present mode of feeding hori-
zontal boilers to act as a self regulating feed valve or to act when required simply
as a check valve fitted with the wheel valve spindle to regulate the lift of the check
valve.

page_text: +
My said improvement essentially consists in having an outside chamber or chest
fitted on the front of the boiler with a passage leading therefrom to the interior of the
boiler at or about-the water level. In this external chamber is fitted the lever, one
end of which projects inside the boiler, the float being attached to the inside end. In
said chest a check valve is fitted on an inlet port to regulate the influx of water from
the feeding apparatus. The check valve has its lift regulated by the float lever which
passes through a slot in the check valve stem, said valve stem projects above the lever,
and has its lift further controlled when necessary by an ordinary wheel valve spindle
working through a stuffing gland in the upper side of the chest. By this means the
check valve may have its lift automatically regulated by the position of the float lever,
or the float lever may be rendered inoperative and the lift of check valve would then
be regulated by the ordinary wheel valve spindle.
. Instead of the water passing into the boiler by the passage through which the float
lever works, there may be a second passage for the admission of the water preferably
at a lower level than the former.
The chest is further fitted with a whistle which is set in operation by the float lever
opening a spring, or dead weight valve, on the float continuing to fall below the
working level.
The float may be of any known form, but is made preferably hollow, and loaded
with water or other liquid, or solid, and a counterbalance weight added to the opposite
arm of the lever.
In order that my invention may be properly understood and readily carried into
effect I have hereunto appended an explanatory sheet of drawings, in the several
Figures of which corresponding parts are marked with the same letters of reference.
Figure 1 is a longitudinal section showing my improvements as applied to a steam
Figures 2 and 3 are similar views.
boiler.
A is the boiler, on the front of which is fitted a chamber or chest B. In this
chamber B there is a lever C, fulcrumed at e, having a short arm C, and a long
arm C2. The long arm C projects into the boiler A, and to which there is attached
the float D, the short arm passing through a slot É in the stem F of the check
valve G, which is fitted to an inlet port H to regulate the supply of water from
the apparatus for feeding the boiler A.
When the water J falls below a certain level the float D falls, and with it the
long arm of the lever C, at same time releasing the check valve G, thus allowing
the water to get into the boiler. As the water flows into the boiler the float D
and long arm (2 of the lever C rise, and so soon as the float D has reached its
highest level the check valve G again closes, thus cutting off the water. Or the
Hoat lever C may be rendered inoperative, and the check valve G regulated by an
ordinary wheel valve spindle H working through a stuffing-box I placed in the
upper side of the chamber B as shown in Figure 1.
In Figure 2 the valve spindle is dispensed with, and pivoted or otherwise secured
to the lever is a valve G which is also actuated by the float D in a manner similar
to that already described with reference to Figure 1. Bolted or otherwise secured to
the chamber B is a corresponding chamber B', in which is fitted a check valve C²
which is operated by the feed to the boiler.
In Figure 3 the long arm of the lever C has a rod F attached to it and to the
lower end of which is the float D. The rod F is preferably fitted into the lever
arm C² with a screw so that it can be lengthened or shortened to suit the desired
normal water level in the boiler. The rod is locked in position by a jamb nut K.
The short arm of the lever has pivoted to it a dead weight L to counterbalance
the float D. The lower end of the chamber B has a through passage B' for the
feed water to pass into the boiler. The weight L is suspended and is free to work
in the chamber B, and has fitted to its lower end a valve G³. As the float D. falls,
the long arm of the lever falls with it, at same time raising the weight L, and
so releasing the valve G³, thus allowing the water to get into the boiler. In the
chamber B³ is a check valve G, which may be closed against its seat to cut off the

page_text: water supply by means of a screwed spindle H' working through a stuffing-box placed
on the top of the chamber B¹.
An alarm steam whistle M is or may be fitted on the top of the chamber B for
drawing the attention of the attendant should the water in the boiler fall dangerously
low, similar to that already described in my previous Patent No. 16971, A.D. 1889.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
1. The general construction or arrangement and combination of the parts for auto-
matically regulating the supply of water to a steam boiler, substantially as described
and shown in Figures 1 and 2 of the accompanying sheet of drawings.
2. The general construction or arrangement and combination of the parts for auto-
matically regulating the supply of water to a steam boiler, and for giving an alarm
on the water falling below the safe working level, substantially as described and shown
on Figure 3 of the accompanying sheet of drawings.
sted this 50th day of July 1800
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Agents.