Improvements in or relating to Water-gauges for Stean Boilers.
Year: 1890

page_text: Date of Application, 17th Mar., 1890
Complete Specification Left, 5th Dec., 1890-Accepted, 10th Jan., 1891
PROVISIONAL SPECIFICATION.
Improvements in or relating to Water-gauges for Stean Boilers.
I, JOHN MCEWEN of 35 Waterloo Road, Liverpool in the County of Lancaster,
Copper Smith and Brass Founder, do hereby declare the nature of my said invention
to be as follows:-
This invention relates to improvements in water-ganges for steam boilers and has for
its object that of providing means for automatically closing the passages in case the
gauge glass or tube is broken, which apparatus also prevents the said passages being
choked by or with deposit. This 1 effect by providing the end of the glass water gauge
screwed to the boiler front with an arm or projection containing an internal chamber with
two valve faces between which are disposed two valves with interlocking fork ends. The
valve nearest to the boiler front is fitted with a stem or guide penetrating into the passage
leading therefrom to the boilor to prevent the passage becoming choked with deposit.
The other valve is attached to a screwed spindle passing through a stuffing box, to the
outside ; the said spindle being fitted with a hand wheel or its equivalent to open
one of the valves and close the other, or to admit of other adjustments as required.
The interlocking fork ends of the valves are so constructed that they can be rotated
to maintain a clear passage between them each time the hand wheel or its equivalent
is operated. The arm or projection forming the upper and lower parts of the water
gauges is provided with suitable arrangements to receive the ordinary or other glass
tube; the bottom one being fitted with the usual blow-off tap. In case the glass
tube breaks the valve nearest to the outlet from the boiler is instantly forced by
pressure against it seat and thus stops the escape of either water or steam, when the
said tube can be replaced at will. If this valve fails in its action the passage can be
closed by operating the band wheel or its equivalent to close the valve attached to its
supporting spindle. The usual stuffing boxes are provided where necessary.
Dated the 15th March 1890.
EDMUND CHADWICK,
A gent.
COMPLETE SPECIFICATION.
Improvements in or relating to Water-gauges for Steam Boilers.
I, JOHN MCEWEN of 35 Waterloo Road, Liverpool in the County of Lancaster,
Copper Smith and Brass Founder, do hereby declare the nature of my said invention
and in what manner the same is to he performed, to be particularly described and
ascertained in and by the following statement:-
This invention relates to improvements in water-gauges for steam boilers and has
for its object that of providing means for automatically closing the passages in case
the gauge glass or tube is broken, which apparatus also prevents the said passages
being choked by or with deposit. This I effect by providing the end of the glass
water-gauge screwed to the boiler front with an arin or projection containing an
internal chamber with two valve faces between which are disposed two valves with
interlocking fork ends. The valve nearest to the boiler front is fitted with a stem or
guide penetrating into the passage leading therefrom to the boiler to prevent the
passage becoming choked with deposit. The other valve is attached to a screwed
spindle passing through a stuffing box to the outside; the said spindle being fitted
with a hand wheel or its equivalent to open one of the valves and close the other, or
to admit of other adjustments as required. The interlocking fork ends of the valves

page_text: are so constructed that they can be rotated to maintain a clear passage between them
each time the hand wheel or its equivalent is operated. The arm or projection forming
the upper and lower parts of the water-gauges is provided with suitable arrangements
to receive the ordinary or other glass tube; the bottom one being fitted with the
usual blow-off tap. In caso the glass tube breaks the valve nearest to the outlet from
the boiler is instantly forced by pressure against its seat and thus stops the escape of
either water or steam, when the said tube can be replaced at will. If this valve
fails in its action the passage can be closed by operating the hand wheel or its
equivalent to close the valve attached to its supporting spindle. The usual stuffing
boxes are provided where necessary.
Fig. 1 is a part sectional elevation of my improved water-gauges for steam
boilers.
Fig. 2 is a sectional elevation of my improved water-gauge showing the method of
automatically closing the outlet from the boiler in case a glass tube breaks.
Fig. 3 is a sectional elevation of my improved water-gauge and the means for
closing the outlet from the boiler in case the automatic apparatus fails in its action.
Fig. 4 is a section through line A¹ B in Fig. 3, and
Fig. 5 is a section through line CD' in Fig. 2.
A is the front plate of a steam boiler to which the water-gauges are attached by
the nuts B; C the bodies or casings of the water-gauges; D the gauge glass or
tube ;
E the nuts for securing the gauge glass or tube in position, and R the usual
blow-off tap.
Each body or casing C is provided internally with the valve faces or seats F and G,
against which the valves H and I operate. The valves H and I are fitted with the
interlocking fork ends J and K, as shown in section in Fig. 4, by which the valve I
is rotated when the valve H is operated by turning the hand-wheel M or its
equivalent, thus maintaining a clear passage between the valve faces or seats F and G
each time the hand-wheel M or its equivalent is rotated. The valve H is attached
to the screwed spindle L provided with the hand-wheel M. or its equivalent; the
latter being for the purpose of operating the valves and 1 when necessary. The
spindles L pass through the stuffing boxes N in the usual manner. The valve I is
fitted with the stem or guide O, which extends through the outlet P leading from the
boiler. The stem or guide O is provided to prevent the outlet P becoming choked
with deposit.
When my improved water-gauges for steam boilers are intact and in working
condition the valves H and I are open as shown in Fig. 1, by which water and steam
will be admitted into the gauge glass or tube D in the usual manner. In case the
gauge glass or tube D is broken the valves I are forced by the pressure in the
boiler against their valve faces or seats G as shown in Fig. 2, and thus automatically
stops the escape of both water and steam, and allows of the broken gauge glass or
tube D being replaced at will. After the broken gauge glass or tube has been
replaced the valves 1 are removed from the faces or seats & by operating the hand
wheels M or their equivalents until the valves H come in contact with the faces or
seats F, at which point the interlocking fork ends J will have opened the valves I as
shown in Fig. 3, after which the valves H are opened, as shown in Fig. 1, by
reversing the action of the hand wheels M or their equivalents. If the valves I
fail to close when a gauge glass or tube breaks, steam and water can be shut-off by
closing the valves H by means of the screwed spindle L and hand-wheel M or its
equivalent, as shown in Fig. 3.
my inven-
Having now particularly described and ascertained the nature of
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. In water-gauges for steam boilers the use of the valves 1 for automatically
closing the outlets for steam and water in case the gauge glass or tube breaks, sub-
stantially as described.
2. In water gauges for steam boilers the use of the valves H for closing the outlets

page_text: for steam and water in case the automatic valves I fail to operate, substantially as
described.
3. In combination with the valves H and the use of the interlocking fork ends J
and K, arranged to operate or rotate the stem or guide O in the passage P for the
purpose specified, substantially as described.
4. The construction. combination, and arrangement of parts forming my improve-
ments in water-gauges for steam boilers, substantially as described and illustrated by
the drawings.
"
T
D
1000
EDMUND CHADWICK,
Agent.