Year: 1897

page_text: I, GEORGE MAULE MARCHANT, of Chapel Hill Brass and Iron Works, Hudders-
field, in the County of York, Brass. Founder and Finisher, do hereby declare the
nature of this invention to be as follows:-
:
This invention relates to certain improvements in that class of valves known as
compound high steam and low water safety valves, and has for its object, the
arrangement and construction of the same in such a manner that, the valve and
valve seating may be examined and repaired without having to remove the valve
block from the boiler block, or to go inside the boiler for removing the dead
weights from the central or ball valve spindle as is now the case with valves as
hitherto constructed; also to arrange the high pressure valve lever fulcrum, in a
manner so as to facilitate the mounting of the lever when the valve is fixed in a
confined position as regards height.
In carrying out my improvements, the valve may be arranged with one or two
outlet branches, one in the valve block and. one in the dome.
The valve seating is recessed into the bottom flange of a perforated casing, which
is secured inside the valve block, and inside this casing is placed the high pressure
valve provided with suitable guides; the upper portion of the valve is connected to
a lever by a spindle in the ordinary manner.
The high pressure valve is also arranged with a seating for a central or ball
valve to which a spindle is attached for suspending the dead weights inside the
boiler, and on this spindle is a collar or flange.
On removing the dome, the high pressure valve is exposed and can be raised a
sufficient height for disconnecting the before mentioned spindle, which when
liberated is allowed to descend until the collar or flange rests upon supports, the
perforated casing may now be removed and the seating examined, repaired or
replaced without having to remove the valve block from its position or having to
go inside the boiler for removing the dead weights. On refixing the valves the
operations are reversed.
With regard to the high pressure valve lever, this is curved and arranged with
V recesses, for resting upon the valve spindle and against a sharp edged V shaped
fulcrum, which is detachable and secured in a recess formed in the support. On
the removal of the detachable piece, the lever may be placed in position and
retained on replacing and securing the said fulcrum.
Dated this 6th day of October 1897.

page_text: Improvements in and relating to Safety Valves.
I GEORGE MAULE MARCHANT, of Chapel Hill, Huddersfield, in the County
of York, Brass Founder and Finisher, 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 certain improvements in that class of valves known
as compound high steam and low water safety valves, and has for its object, the
arrangement and construction of the same in such a manner that, the valve and
valve seating may be examined and repaired without having to remove the valve
block from the boiler block, or to go inside the boiler for removing the dead
weights from the central or ball valve spindle, as is now the case with valves!
as hitherto constructed; also to arrange the high pressure valve lever fulcrum.
in a manner so as to facilitate the mounting of the lever when the valve is fixed
in a, confined position as regards height.
In describing my invention in detail, reference is made to the accompanying
sheet of drawings in which Fig. 1 represents an elevation of a safety valve
shown partly in section and constructed in accordance with my invention.
Fig. 2 is an elevation of the lower portion of a safety valve showing a modified
method of securing the valve seating, and
Figs. 3 and 4 are detached details of the safety valve lever fulcrum.
In carrying out my improvements, the safety valve may be arranged with one
or two outlet branches, Â in the valve block B, and C in the dome D. When
there is no branch in the dome, I perforate the flanges at E so that any escape
of steam through the centre valve F will pass through the said perforations to
the outlet branch A.
The valve seating G may be recessed into the bottom portion H¹ of the
perforated or cage like casing H which is secured inside the valve block B and
inside this casing is placed the high pressure valve J provided with suitable
narrow guide pieces K at intervals around the circumference of same at the
top and bottom. To the perforated dome L a spindle M is connected in any
convenient manner, the upper portion of which is provided with a lever N¹.
The high pressure valve J is also provided with a seating O for the central
or ball valve F to which a spindle P is attached for suspending the dead weights
inside the boiler in the manner as hitherto, and on this spindle is formed or
secured a narrow cross bar or flange P¹ of such length that when the spindle P
is lowered, the narrow cross bar or flange P¹ will rest upon the projection Q.
The perforated or cage like casing H is of such length that, it is kept in position
by the top flange H2 fitting into a recess formed in the flange B2 of valve block B
and is held therein by the overlapping of the bottom flange face of dome D on the
removal of which, the high pressure valve J is exposed, so that the perforated
dome L can be removed, and on unscrewing the nut N from the spindle P it is
liberated from the central or ball valve F and lowered until the narrow cross bar
or flange P¹ rests upon the projecting support Q, the high pressure valve J is
then free and can be removed from the perforated or cage like casing H.
The removal of the dome D liberates the perforated or cage like casing H, thus
· liberating the valve seating G for examination or repairs without having to remove.
the valve block B from its position, or having to go inside the boiler to
remove the dead weights attached in the ordinary manner to the bottom end of
central or ball valve spindle P.
I have shown the dome D provided with an outlet branch C, but this may be
2

page_text: dispensed with on perforating the flanges at E, thus making communications
between the interior of the dome D and the interior of the valve block B and
outlet A from same.
The high pressure valve seating G may be secured by inserting same in the
bottom flange B³ of valve block B and for supporting the narrow cross bar or
flange P¹ when liberated in the manner as before described. I form on the said
valve seating or on the block S a projection S¹.
With regard to the high pressure valve lever N¹, this is curved and arranged
with V recesses for resting upon the valve spindle M formed or provided with a
V shaped attachment M' and against a sharp b shaped fulcrum U which is
detachable from the support U¹ on removing the olt or pin W passing through
the sides of the said support and detachable piece U which fits into like shaped
recesses U2 formed in the sides of the support U' so that on reinstating the
detachable piece U after removal, it will occupy the same position as before.
By forming the fulcrum support in the manner described, when the distance
between the top of the valve spindle and underside of boiler house roof is limited,
the lever N¹ may be more readily connected or disconnected than when arranged in
the ordinary manner, as by the removal of the detachable piece U the lever may be
connected or removed by sliding the same through the guide Y somewhat in a
horizontal direction.
Having now particularly described and ascertained the nature of my invention,
and in what manner the same is to be performed, I declare that what I
claim is:-
1. A safety valve with which is combined a valve seating G held in position by
perforated or cage like casing H and dome D, the high pressure valve J being
provided with a central or ball valve F, all arranged substantially in the manner as
and for the purpose as herein before described.
2. A high pressure safety valve J provided with a central or ball valve F' com-
bined with a spindle P and narrow cross bar or flange P1, all arranged substantially
in the manner and for the purpose as herein before set forth.
3. The securing of valve seatings G by insertion in a recess formed in a flange and
held therein by the face of the adjoining flange, substantially in the manner and
for the purpose as hereinbefore set forth.
4. A support U¹ with which is combined a detachable piece U having a sharp or
narrow edge as fulcrum bearing surface of lever N³, arranged substantially in the
manner and for the purpose as herein before set forth.
Dated this 6th day of July 1898.
Dated this 6th day of July 1898.
JOHN WAUGH,
Agent, Sunbridge Chambers, Bradford.