Improvements in Valve Apparatus.
Year: 1889

page_text: Date of Application, 27th Mar., 1889
Complete Specification Left, 23rd Dec., 1889-Accepted, 15th Feb., 1890
PROVISIONAL SPECIFICATION.
Improvements in Valve Apparatus.
I, HERBERT TROTT of 75 High Street, Battersea, in the County of Surrey, Engineer,
do hereby declare the nature of this invention to be as follows:-
This invention has for its object to provide means for facilitating the removal of
parts of valves for examination, repair, or renewal, by cutting off the supply of liquid
in advance of the valve chamber from which the valve is being removed.
This, according to my invention, I effect by means of a plug valve which is so
mounted as to have a constant tendency to close, under the pressure of the water or
other fluid, upon the inlet opening of the valve leading to the valve chamber of the
valve under repair, and this plug valve has a stem or connection by means of which
the closing of the principal valve also causes the opening of the plug valve, and the
opening of the principal valve to any ordinary extent for supply of liquid ensures the
remaining open of the plug valve but on extreme removal of the principal-valve from
its seat the plug valve is designed to have play to close the inlet passage and the
principal valve may be removed from the apparatus without waste of liquid.
Replacement of the principal valve and its approach to its seat causes the movement
of the plug valve and renewal of flow.
This invention is very readily adaptable to valves such as are known as Trott's
Patent Valves and the subject matter of Letters Patent No. 11727 28th August 1884;
10125 26th August 1885; 15275 9th November 1887; 217 5th January 1888, as well
as to valves generally.
In cases of low pressures the closing of the plug may be aided by a spring acting
to cause the plug valve to have a constant tendency to press to its seat.
Dated the 27th day of March 1889.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Valve Apparatus.
I HERBERT TROTT of 75 High Street, Battersea in the County of Surrey, 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:
This invention has for its object to provide means for facilitating the removal of the
closing parts of valves made in accordance with the specifications of my former
patents hereinafter recited or with the valve piece capable of disconnection and
removal as therein described and claimed for examination, repair, or removal, by
cutting off the supply of liquid in advance of the valve chamber from which the
valve is being removed.
This, according to my invention I effect by means of an auxiliary valve which is so
mounted as to have a constant tendency to close under the pressure of the water or
other fluid, upon the inlet opening of the valve leading to the valve chamber of the
valve under repair, and this auxiliary valve has a stem or connection by means of
which the closing of the principal valve also causes the opening of the auxiliary valve,
and the opening of the principal valve to any ordinary extent for supply of liquid
ensures the remaining open of the auxiliary valve, but on extreme removal of the -
principal valve from its seat the auxiliary valve is designed to have play to close the
inlet passage, or the principal or main closing valve may be removed from the chamber

page_text: for repair or other purpose without waste of liquid or cutting off of supply by reason
of the auxiliary valve closing the inlet opening by being drawn or floating thereto.
Replacement of the principal valve and its approach to its seat causes the movement
of the auxiliary valve and renewal of flow.
This invention is adaptable to valves having their main closing pieces or valves
proper capable of disconnection and removal from their valve chambers without
necessarily providing any extraneous means for cutting off of the supply of fluid such
as are known as Trott's Patent Valves and the subject matter of Letters Patent
Nos. 11727 28th August 1884; 10125 26th August 1885; 15275 9th November 1887 ;
217 5th January 1888.
In cases of low pressures the closing of the auxiliary valve may be aided by a spring
acting to cause the auxiliary valve to have a constant tendency to press to its seat.
Fig. 1 shews a valve arranged according to the system patented to me in the patents
before enumerated, with the addition of my present improvements. In this view the
parts are shewn in section.
a is the spindle, the rotation of which by means of the handle a¹, rotates the screw a²,
and causes that spindle to be moved to and fro according to the change of direction of
rotation, by the thread a² engaging the corresponding female screw formed in the
casing of the valve. is a screw packing pieco engaging a thread in the casing b
and serving to compress suitable packing and to prevent escape of liquid around the
spindle a. 63 is an opening closed by the screw cap 3. In the sides of this opening
are formed ledges or grooves in which slide the horns or projections c¹, formed to the
valve piece c.
43 is a stem projecting from the spindle a, and formed with an
enlargement which engages in a slotted projection c² from the back of the valve piece c.
c is the elastic or other face of the valve piece which engages the seat of the valve.
6 is the inlet opening in the valve case, and 66 is the outlet passage; but none of the
foregoing parts are in themselves claimed as forming part of the present invention, and
are shewn only as illustrating the application of the present invention.
Fig. 2. shews a section, Fig. 3 a side view and Fig. 4 a detail of the present
invention separately. d is the central spindle formed with a stop d' and a coned
valve piece d². e is an annular piece made removeable from the valve casing b, by
being formed externally with a screw thread e¹; and having a coned soat e²
corresponding with the valve piece d². e³, et are bearings for the spindle d borne by
arms from the annular piece c.
In operation whenever the screw spindle a is moved inwards to its ordinary
working position, the valve piece comes in contact with the end of the steni d, forcing
the valve piece d² from its seat and opening the passage for supply of fluid which
finds its exit between the valve c and its seat to the outlet 6. Continuing the
motion the valve c may be closed on its seat and the supply of fluid entirely
stopped. The supply may be reinstated by a reverse movement, but by continuing
the rotation of the spindle a the valve piece may be brought to its extreme extent of
outward movement when the auxiliary valve piece d² will have come home to its
seat and close the passage for liquid, when the valve piece c can be removed without
escape of liquid through the opening left by the removal of the cap b³.
Fig. 5 shews parts similar to Fig. 1 except that the form of screw a² is altered so
as to adapt the spindle a to be operated by a ball lever indicated by the sectional
portion thereof a. in this figure is a modified form of pack-cap for preventing
passage of liquid between the stem a and the casing b.
Figs. 6 and 7 shew a modification in the arrangement of the connection for
operating the auxiliary valve piece d, particularly adapted for low pressures where
the force exerted by the water may not always be sufficient to close the valve d² to
its seat e². In this case the end of the stem d is formed with a flanged head d³
which is clasped (see Fig. 7) by the horns of a plate projecting from the valve c.
The movement in one direction forces the auxiliary valve d from its seat, whilst the

page_text: movement of the piece c in the opposite direction pulls the valve d² to its seat by the
stem d.
Fig. 8 indicates a slight modification of the preceding figures adapted for cases
where the auxiliary valve is to operate in a vertical direction where the tendency of
the valve piece d' is to fall away from its seat. In such cases I find it advantageous
to interpose a spring between the support e³ and the collar d' of the valve stem d,
thereby giving this stem a constant tendency to rise and draw the auxiliary valve to
its seat.
.
Fig. 9 is a vertical section of the auxiliary valve and its seating separately.
Figs. 10 and 11 are end views of the auxiliary valve-seat and valve d² separately.
Fig. 12 is a slight modification in construction. In this case access to the valve c
is attained by unscrewing the outlet cap or plug as in other of the figures. In this
case the auxiliary valve d² is shewn as connected to the rear side of the valve piece c
by horns which grasp the neck of the projection d³, the auxiliary valve d2 being
formed of semi-globular or convex outline, fitting against the seating e². This
valve rides on a central pin 6', which is mounted on a removeable screw plug 68,
which is screwed into an opening 6° formed in the underside of the valve case b, and
through this opening the auxiliary valve d' may be removed when required after
removal of the valve piece c. In the drawing fig. 12 the auxiliary valve d² is shewn
as being capable of being drawn to its seat by its connection to the main valve c but
such connection is not always necessary as the water in the rear of the valve d
will move it to its seat or it may float thereto by being formed hollow and enclosing
air.
Fig. 13 is another modification particularly adapted to main stop valves. In this
case the valve c is removed by the removal of the screw plug 3, indicated by the
circular line, in a similar manner to that indicated in Fig. 1. The auxiliary valve is
connected to this valve cas in the preceding Figure, and is formed with a flat face
to engage the seat e². This auxiliary valve is mounted on the pin ' extending from
the cap 68, closing the opening 6, which replaces the plug in the preceding Figure.
6 is the inlet and 6 the outlet for fluid. To remove the weight and facilitate
operation of the valve d² a spring f may be inserted in the chamber d' in the
valve d², which spring takes an abutment against the end of the pin 6' and the end
of the chamber d⭑.
Fig. 14. shews another modification in which the annular seating for the valve d³,
and the bearing e³ for the stem d thereof is made removeable by being screwed into the
opening formed in the partition or diaphragm 6, instead of into the inlet as in
Fig. 1.
Fig. 15 indicates a modification adapted to self closing spring valve, in which the
valve stem a operating the valve c has a constant tendency to draw that valve c to its
seat by means of the spring g, whilst that valve is pushed from its seat by rocking the
lever as is well understood. This valve c however has formed rearward of it a horn
plate which grasps the head of a stem d formed on a hollow valve piece d' which
slides in the opening of a valve case b; and this valve piece has a flanged end d
which in the position indicated serves to close the opening against entrance of fluid.
When however the valve c is pressed open this cylindrical valve d' is forced outwards
bringing the openings 1. 1 free of the case at 66, and allowing ingress of fluid to the
interior of the tubular valve, which liquid finds its egress by the openings 2. 2 therein,
to the interior of the valve chamber, and thence out by the passage 6º.
Fig. 16. shews a modification in the mode of operating the cylindrical valve d², the
stem being simply pushed inwards to open the passages 1, 1 for ingress of fluid
which finds its exit by the openings 2, 2 therein whilst on the retreat of the valve c
the pressure of the fluid forces the valve within the chamber and closes the opening.
Fig. 17 is another modification in which the openings 1. 1 are formed of a series of
holes and the exit openings are formed at the end, around the stem d. The bearing e
can be screwed in the opening by means of the screw thread e¹.
Fig. 18 is another modification of the form of the sliding cylindrical valve d² in
which the flange is substituted by a coned piece fitting a correspondingly coned

page_text: seating in a screw plug, which is capable of being screwed into a corresponding screw
thread in the opening 65.
Corresponding letters indicate corresponding parts throughout the drawings.
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 combination or arrangement with the parts of a valve having its main closer
or valve proper capable of disconnection and removal from its valve chamber in the
manner herein, described and shown of an auxiliary valve and parts cooperating
therewith, adapted to be drawn by the main valve into position to cut off the supply
of fluid on the inlet side of the main valve chamber from which the main valve is
being removed, so as to admit of the stoppage of supply of fluid whilst the valve
proper is absent, substantially as and for the purposes set forth.
2. The combination or arrangement of the parts of a valve having its main closer
or valve proper capable of disconnection and removal from its chamber as shewn and
described in such manner that upon removal of such main closing piece or valve
proper, an auxiliary valve, as d², closes the inlet opening for liquid so as to prevent
access of liquid, substantially as and for the purposes set forth.
3. The various adaptations or arrangements of valve apparatus as; and for the
purposes herein before set forth.
Dated
Locou how
ת 1AA Ah
WM.. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.