Improvements in the Valves known as "Back-pressure Valves' and in Certain other Valves.
Year: 1886

page_text: Improvements in the Valves known as "Back-pressure Valves' and
in Certain other Valves.
I THOMAS HENRY WHITE of 3 Ordsall Terrace Crowther Street Regent Road
Salford in the County of Lancaster Engineer do hereby declare the nature of my
invention for IMPROVEMENTS IN THE VALVES KNOWN AS BACK-PRESSURE VALVES,"
AND IN CERTAIN OTHER VALVES, to be as follows:-
"
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"
My invention relates to what are ordinarily called 'back-pressure valves' and to
certain other valves and consists in arrangements by the employment of which I am
enabled to remove certain parts of the back-pressure valves or other valves to which
my invention is applied, for examination repair or other purpose more readily than has
hitherto been possible.
In carrying my invention into effect I provide each of the back-pressure valves or
other valves to which my invention is applied with a part secured thereto by means of
screw-threads which part is provided with a seating in conjunction with which the
valve employed in each of such back-pressure valves or other valves acts when the
said back-pressure valve or other valve is in use and which part is so arranged that
when it is removed from the back-pressure valve or other valve in which it is employed
it allows the said seating and the valve employed in conjunction therewith to be
examined, cleaned and repaired or otherwise treated or to be replaced by another
seating or valve or seating and valve. The seating above mentioned may be formed
upon or in the part above referred to which is secured to the back-pressure valve or
other valve by means of screw-threads or the said seating may be formed upon or in
a part placed in or secured to the part aforesaid in any suitable manner and the valve
used in conjunction with the said seating may be of any suitable form.
I provide each of the back-pressure valves or other valves to which my invention is
applied with another valve provided with a spindle passing through a gland or
stuffing-box and provided with screw-threads taking into corresponding screw-threads
formed in the body or casing of the back-pressure valve or other valve or in a part
secured to the body or casing of the back-pressure valve or other valve, by which valve,
when such valve is brought into contact with a seating the passage of liquid o" fluid
through the said back-pressure valve or other valve may be prevented or stopped at
"PQ27

page_text: such times as the part above mentioned which is provided with or contains the seating
in conjunction with which acts the valve used in the said back-pressure valve or other
valve is to be removed for any purpose at any time. By means of the said valve
provided with a spindle I am enabled to at any time control regulate arrest or prevent
the flow of liquid or fluid through the back-pressure valve or other valve to which my
invention is applied.
In some cases I employ in each back-pressure valve or other valve to which my
invention is applied a spindle provided with screw-threads taking into corresponding
screw-threads formed in the body or casing of the back-pressure valve or other valve
which spindle passes through a gland or stuffing-box formed in or secured to the body
or casing of the back-pressure valve or other valve one end of which spindle may be
caused to act upon the valve acting in conjunction with the seating above referred to
which is formed upon or in or upon or in a part placed in or secured to the above-
mentioned part which is secured to the body or casing of the back-pressure valve or
other valve by means of screw-threads.
In some cases I do not employ the spindle above mentioned which is provided with
a valve by which the flow of liquid or fluid through the back-pressure valve or other
valve may at any time be prevented arrested or controlled or regulated as above
described.
Among the valves other than back-pressure valves, to which my invention may be
applied I would mention as an instance the ball valves occasionally employed in the
cocks or valves employed in certain water-guages employed in conjunction with
.steam-boilers and other analagous apparatus, to prevent or reduce the escape of steam
and water which would otherwise occur upon the fracture or breakage of the glass or
other tube employed in each of such water guages.
W. T. CHEETHAM,
Carlton Chambers,
18, St. Ann's Street, Manchester,
Agent to the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in the Valves known as ⚫ Back Pressure Valves" and
in Certain other Valves.
I THOMAS HENRY WHITE of 3 Ordsall Terrace, Crowther Street, Regent Road,
Salford in the County of Lancaster 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 invention relates to what are ordinarily called "back pressure valves" and to
certain other valves and consists in arrangements by the employment of which I
an enabled to remove certain parts of the back pressure valves or other valves to
which my invention is applied for examination repair or other purpose more readily
than has hitherto been possible.
In carrying my invention into effect I provide each of the back pressure valves
or other valves to which my invention is applied with a part secured thereto by means
of screw-threads which part is provided with a seating in conjunction with which the
valve employed in each of such back pressure valves or other valves acts when the said
back pressure valve or other valve is in use and which part is so arranged that when
it is removed from the back pressure valve or other valve in which it is employed
it allows the said seating and the valve employed in conjunction therewith to be
examined cleaned and repaired or otherwise treated or to be replaced by another
seating or valve or seating and valve. The seating above-mentioned may be formed
upon or in the part above referred to which is secured to the back pressure valve or
other valve by means of screw threads or the said seating may be formed upon or
in a part placed in or secured to the part aforesaid in any suitable manner and the
valve used in conjunction with the said seating may be of any suitable form. I
provide each of the back pressure valves or other valves to which my invention is
applied with another valve provided with a spindle passing through a gland or
stuffing box and provided with screw threads taking into corresponding screw threads
formed in the body or casing of the back pressure valve or other valve or in a part
secured to the body or casing of the back pressure valve or other valve; by which
valve aforesaid when such valve is brought into contact with a seating the passage of
liquid or fluid through the said back pressure valve or other valve may be prevented
or stopped at such times as the part above mentioned which is provided with or
contains the seating in conjunction with which acts the valve used in the said back
pressure valve or other valve is to be removed for any purpose at any time. By
means of the said valve provided with a spindle I am enabled to any time control,
regulate arrest or prevent the flow of liquid or fluid through the back pressure valve or
other valve to which my invention is applied.
In order that my invention may be thoroughly understood and readily carried into
effect I will describe the same by reference to the drawings hereunto annexed.

page_text: One arrangement of my invention is shown in Fig. 1 of the drawings hereunto
annexed which figure is a vertical longitudinal section of a back pressure valve
arranged according to my invention. In Fig. 1a is the casing or body of the back,
pressure valve. The interior of the casing or body a is provided with a diaphragm
or partition 6 which is formed as part of the said casing or body a. I provide the
casing or body a with a part c which is secured to the said casing or body a by
means of the screw threads c' and is provided with a chamber A which com-
municates by means of the opening B with the part C of the interior of the casing or
body a and by means of an opening with the part D of the interior of the casing or
body a. The upper end of the part c must form with the part of the diaphragm
or partition 6 with which it is in contact a tight joint. Upon or in the part c I
form a seating c² in conjunction with which seating c², I employ a valve d'which is
guided while rising from or moving towards its seating by having formed upon it
a part d¹, which passes into and is guided by a hole e' formed in the lower part of a
spindle e. The spindle is provided at its lower end with a valve e² and at its upper
end with a hand wheel f. The spindle e is also provided with screw-threads which
engage with corresponding screw-threads formed in a part g secured by means of
screw-threads to the casing or body a. The spindle e passes through a stuffing-box or
gland h which prevents liquid or fluid from escaping through the opening through
which the spindle e passes. When the back pressure valve shewn in Fig. 1 is in use
under normal conditions the liquid or fluid passing through such back pressure valve
enters the part C of the interior of the casing or body a and passing through the
opening B and chamber A raises the valve d from its seating and passes into
the part D of the interior of the casing or body a whence such liquid or fluid may be
conducted to the place where it is required. The valve d while allowing liquid or
fluid to pass through the back pressure valve in the direction indicated by the
arrows E prevents liquid or fluid from passing through the back pressure valve in a
direction opposite to that indicated by the arrows E. If from any cause the
valve d ceases to act properly and it is desired that the seating c² and the valve d be
removed for examination, cleaning repair or any other purpose, the hand wheel fis
turned so as to rotate the spindle e in such direction that the said spindle e will by
means of the screw-threads 3 10med thereon and engaging with the corresponding
screw-threads formed in the pug be caused to move the valve c² towards and into
contact with the seating formed in the diaphragm or partition b. As soon as the
valve e is in contact with the seasing b₁ the part c may be removed from the casing
or body a and the seating c² and valve d examined and cleaned or repaired when the
valve d may be again placed upon the seating and the part c again screwed into
the casing or body a or instead of the part c and valve d or part c or valve d another
and similar part and valve or part or valve may be employed. After the part c and
the valve d have been returned to their places in the casing or body a or the similar
part or valve or part and valve used in place of the part c or valve d or part c and
valve d has or have been placed in position in the casing or body a the valve e² may
be again removed from the seating b. If at any time when the back pressure valve
shewn in Fig. 1 is in use under normal conditions it is desired to arrest or prevent the
passage or flow of liquid or fluid through the back pressure valve in the direction
indicated by the arrows E the valve e² may by the hand-wheelf being turned in the
required direction be placed in contact with the seating 61 so as to prevent liquid or
fluid from passing through the back pressure valve in the direction indicated by the
arrows E.
Another arrangement of my invention is shown in Fig. 2 of the drawings hereunto
annexed which figure is a vertical longitudinal section of a back pressure valve
arranged according to my invention. The back pressure valve shewn in Fig. 2 being
substantially the same as that shown in Fig. 1 I shall affix to parts corresponding to
those of Fig. 1 the same letters of reference as have above been applied to the
corresponding parts in Fig. 1. In the back pressure valve shewn in Fig. 2 the
valve attached to the spindle e acts in conjunction with a seating ¹ formed upon

page_text: the upper surface of the diaphragm or partition 6 but in all other respects the con-
struction and operation of the back pressure valve shewn in Fig. 2 are similar to those
of the back pressure valve shewn in Fig. 1 so that further description of the construction
and operation of the back pressure valve shown on Fig. 2 is unnecessary.
In some cases instead of forming the seating in conjunction with which acts the
valve employed in a back pressure valve to which my invention is applied upon or in
the above mentioned part which is secured to the body of the back pressure valve by
ineans of screw-threads I form such seating upon or in a part placed in or upon and
removable from the said part which is secured to the casing or body of the back-
pressure valve by means of screw threads. This part of my invention is illustrated by
Fig. 3-To such parts of this arrangement of back pressure valves as are similar to
those shewn in Figs. 1 and 2 I shall affix the same letters of reference as are affixed
to the corresponding parts shewn in Figs. 1 and 2, c is a part provided with screw-
threads c¹ which take into corresponding screw threads formed in the body or casing a.
In a part of the part c is formed an annular recess in which is placed a ring j of metal
which ring is forced by means of the part c against a facing formed upon or in the
diaphragm b. is a valve formed with two spindles or guides ¹ and ². The spindle
or guide passes into a hole or recess e¹ formed in the spindle e and the spindle or
guide passes into a hole or recess c formed in the part c. The valve k is formed
with two conical surfaces and the seating is also provided with two conical
surfaces 1. By means of the spindles or guides k¹² and holes or recesses e¹ c³ either
of the conical surfaces may be placed in contact with the seating ; and either of
the two conical surfaces of the seating ; may be employed to receive the valve k.
The valve and seating ; may be employed in a back pressure valve in which the
valve and seating 6' are arranged as indicated in Figs. 1 and 3 or as indicated in
Fig. 2.
In some cases I do not employ the spindle above mentioned provided with screw
threads which is provided with a valve by which the flow of liquid or fluid through
the back pressure valve mayat any time be prevented arrested controlled or regulated
as above described. This arrangement of my invention is shewn by Fig. 4 in which
figure is the body of the back pressure valve. m is a part upon which are formed
screw-threadsm by which the said part m may be secured to the casing or body b of
the back-pressure valve. In the part m is formed a recess in which an annular
seating is placed. The seating n is formed with two conical surfaces n¹ n². By
means of the screw threads m' the seating n may be forced against the diaphragm o so
as to make a tight joint therewith. Upon the body or casing / is formed a boss in
which is formed a hole or recess 2. p is a valve provided at opposite sides with
spindles plp². Liquid or fluid passing through the back pressure valve in the direction
indicated by the arrows F will after passing through the opening m² formed in the
part raise the valve p from its seat but the valve p will prevent liquid or fluid from
Howing through the back pressure valve in a direction opposite to that indicated by
the arrows F. When the part m is removed from the casing or body the
seating, may be reversed to bring the surface n² in contact with the valve p or
replaced by a fresh one or the valve p may be reversed to bring the surface p³ against
the seating n or both the valve p and the seating n may be replaced by fresh ones.
In Fig. 5 of the drawing hereunto annexed is shown in longitudinal vertical section
another arrangement of back pressure valve constructed according to my invention in
which arrangement the flow or passage of liquid or fluid may be arrested or prevented
at any time when the back pressure valve is in use by the turning of a hand wheel
mounted upon a spindle provided with screw threads which spindle can when required
be made to press a valve into contact with the seating in conjunction with which it
acts. Upon the casing or body g of the back pressure valve shown in Fig. 5 I form a
tubular part through the interior of which passes a spindle t which is provided with
a hand wheel by which it may be turned and I also provide the spindle t with screw
threads which engage with corresponding screw threads formed in the interior of
the tubular part r.

page_text: The spindle t passes through a stuffing box or gland by which the escape of liquid
or fluid between the spindle t and the interior surface of the tubular part
prevented.
is
In the lower end of the spindle t I form a hole into which passes and in which is
guided the part w¹ of the valve w and upon the lower end of the spindle t I form an
enlarged part 3 which at times prevents the spindle t from being moved too far in the
direction indicated by the arrow G and at times may be caused to press the
valve w against the seating a in conjunction with which it acts and so prevent or stop
liquid or fluid from passing through the back-pressure valve in the direction indicated
by the arrows H. I provide the casing or body q with a part y which is secured to
the said casing or body q by means of screw-threads y'. In the part y I form a
chamber which communicates by means of the openings K with the part L of the
interior of the casing or body q and by means of the opening formed through the
upper end of the part y with the part M of the interior of the casing or body q. Upon
the upper surface of the upper end of the part y and around the opening aforesaid I
form the seating x in conjunction with which acts the valve w. The valve wis
provided with a part w' which passes into and is guided by the hole ta formed in the
spindle t. The part y is so formed that when such part y is screwed into the casing or
body g of the back pressure valve liquid-tight or fluid-tight joints will be formed
between the upper end of the part y and the diaphragm q¹ and between the
Hange y² of the part y and the casing or body q of the back pressure valve. When
is desired to stop or prevent liquid or fluid from passing through the back pressure
valve in the direction indicated by the arrows H the hand wheel u is turned so as to
cause the spindle t to be by means of the screw-threads t moved in a direction
opposite to that indicated by the arrow G until the lower end of the enlarged
part 3 of the spindle t presses the valve w against the seating a in conjunction with
which it acts. When it is again desired to allow liquid or fluid to pass through the
back pressure valve in the direction indicated by the arrows H the hand wheel u is
turned so as to cause the spindle t to be by means of the screw threads t¹ moved
in the direction indicated by the arrow G until liquid or fluid passes through the back
pressure valve in the direction indicated by the arrows H or until the enlarged
part 3 of the spindle t by arriving against the lower end of the tubular part 7 prevents
the spindlet from being moved further in the direction indicated by the arrow G.
By my invention I am enabled to remove from a back pressure valve the valve or
seating or valve and seating ordinarily employed therein and examine clean and repair
it or them or replace it or them by another similar valve or seating or valve and
seating without moving or displacing the casing or body of the back pressure valve
and by my invention I am enabled in the case of the arrangements of back pressure
valves shown in Figs. 1. 2 3 and 5 of the drawings hereunto annexed to at any time
control, regulate stop or prevent the passage of liquid or fluid through the back
pressure valve and by my invention I am enabled in the case of the arrangements of
back pressure valves shewn in Figs. 1, 2 and 3 of the drawings hereunto annexed to
remove from a back pressure valve the seating and valve or seating or valve employed
therein without it being necessary when the back pressure valve is connected to a steam
boiler or other apparatus or vessel containing liquid or fluid under pressure to allow
the pressure of steam or other liquid or fluid to diminish.
Although I have in the Drawings hereunto annexed shown the valves dkp and was
being of two forms only I would have it understood that instead of each of the
valves a valve of any other suitable kind may be employed.
Although I have above described and shown in the Drawing hereunto annexed but
five arrangements of back pressure valves constructed according to my invention I
would have it understood that I do not confine myself to the use of my invention
precisely as described as the modes in which my invention may be carried into effect
may be considerably varied without departure from the principles of my invention.
Another application of my invention is illustrated by Figs. 6 and 7'of the drawings
hereunto annexed in which figures Fig. 6 is a vertical section and Fig. 7 a plan of a
water gauge or other similar gauge to be used in conjunction with a steam-boiler or

page_text: other analogous apparatus and provided with valves constructed and arranged according
to my invention. The water gauge or other similar gauge shown in Figs. 6 and 7 is
provided with valves, 1 which at times prevent steam or water or other liquid or
fluid from passing through the passages 2, 3 leading to the glass or other tube 4 employed
in such water gauge or other similar gauge. The valves, 1 act in conjunction with
seatings 5. 6 respectively. The seatings 5. 6 are formed respectively upon
parts 7.8 respectively secured by screw-threads to the tubular brackets 9, 10 by which
the water-gauge or other similar gauge is secured to the steam-boiler or other
apparatus to which it is applied. I provide the tubular bracket 9 with a seating 11 and
with a tubular part 12 through which tubular part 12 passes a spindle 13. The
spindle 13 also passes through a stuffing box or gland 14 by which the escape of
steam, water or other fluid or liquid may be prevented. Upon the spindle 13 1 form
a valve 15 which may be caused to at times be in contact with the seating 11. The
tabular bracket 10 is also provided with a seating 16 and a tubular part 17 through
which passes a spindle 18. The spindle 18 passes through a stuffing box or
gland 19 by which the escape of steam water or other liquid or fluid may be prevented.
Upon the spindle 18 I form a valve 20 which may be caused to at times be in contact
with the seating 16. The valves z, 1 are similar to those now in use in conjunction
with some water-gauges to prevent or reduce the escape of steam and water when the
glass or other tube employed in the water-gauge becomes broken or injured. If at
any time it is desired to examine, clean or repair the valve and the seating 5 or
valve z or seating 5 or to replace the valve zor seating 5 or valve z and seating 5 by
another similar valve or seating or valve and seating, it is only necessary to turn
the spindle 13 so that the valve 15 is caused to come into contact with the
seating 11 and then remove the part 7 from the tubular bracket 9 by unscrewing the
said part 7. The valve z and seating 5 may then be examined cleaned or repaired or
be replaced by another similar valve and seating or valve or seating and the
valve z and part 7 or the valve 2 or part 7 or valve and part or valve or part employed
in place of the valve z and part 7 or valve z or part 7 may be replaced or placed in
position in the tubular bracket 9 and the valve 15 again removed out of contact with
the seating 11. The valve 1 and seating 6 may when required be examined cleaned
or repaired or be replaced by another similar valve and seating or valve or seating in
a manner similar to that above described in reference to the valve z and seating 5.
By means of the spindles 13 and 18 and valves 15 and 20 and the tap or cock 21 the
water-gauge or other similar gauge may be manipulated in a manner similar to that
in which an ordinary water-gauge may be manipulated.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is:-
1. In a back pressure valve of the kind illustrated in Figs. 1 and 2 of the drawings
hereunto annexed a seating such as b¹ and spindle such as e provided with a
valve e² capable of being caused to act in conjunction with the said seating b¹ all
constructed, arranged used and operating for the purposes and substantially in the
manner hereinbefore described in reference to and indicated by Figs. 1 and 2 of the
drawings hereunto annexed.
2. In a back pressure valve of the kind illustrated in Figs. 1 and 2 or of the kind
illustrated by Fig. 5 a seating and valve each capable of being reversed in position in
the back pressure valve or replaced by a similar part and constructed arranged and
used for the purposes and substantially in the manner hereinbefore described and
indicated in Figs. 3 and 5 of the drawings hereunto annexed.
3. In a back pressure valve of the kind illustrated by Fig. 4 a seating such as n and
valve such as p each formed so as to be capable of being reversed in position in the
back pressure valve or replaced by a similar part and constructed arranged and used
for the purposes and substantially in the manner herein before described and indicated
in Fig. 4 of the drawings hereunto annexed.
4. In a water-gauge or other analogous apparatus provided with valves to prevent
or reduce the escape of steam water or other fluid or liquid the arrangements

page_text: herein before described by which the said valves and the seatings in conjunction with
which they at times act are rendered capable of being removed from the water
gauge or other analogous apparatus for examination repair or other purpose more
readily than they have hitherto been, which arrangements consist in parts such
as 7 and 8 each secured by means of screw-threads to one of the tubular
brackets 9, 10 or other equivalent apparatus employed in the water-gauge or other
analogous apparatus each of which parts 7 and 8 is provided with a seating to act
in conjunction with one of the valves above mentioned and is constructed arranged
and used substantially as herein before described in reference to and indicated by
Figs. 6 and 7 of the drawings hereunto annexed.
W. T. CHEETHAM,
Carlton Chambers,
18, St. Ann's Street, Manchester,
Agent to the Applicant.