Improvements in or connected with Stop Valves.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in or connected with Stop Valves. .
We, ENGELBRECHT ANDERSEN and EMIL THOMAS FLERON, both of
20 Raevegade, Copenhagen in the Kingdom of Denmark, Engineers in the Royal
Danish Navy, do hereby declare the nature of this invention to be as follows:-
The invention relates to improvements in or connected with stop valves, and has
for its object to instantaneously shut off the steam supply from the boilers in the
case of the fracture of the steam pipes or other accident which generally permits
the steam to rush into the engine room or stoke-hole to the injury of the engineers
and stokers.
In carrying the invention into effect the stop valve is mounted within a case in
the ordinary manner, and the valve spindle passes through and loosely fits a guide
formed in the cover of the valve box.
This cover forms one end of a cylinder, arranged beyond the valve box, and
upon the valve rod within the cylinder is fixed a piston of larger diameter than
the stop valve whilst beyond the piston the spindle passes through a stuffing box
provided in the cover of the cylinder and its movements are regulated by a set
screw screwing through a nut formed in the crosshead of a frame carried by the
cylinder cover..
At the side of the cylinder ports are arranged communicating with each end
thereof above and below the piston and these ways are controlled by a cock carried
by the cylinder exteriorly thereof and the plug of this cock is provided with two
ways coinciding with the ports of the cylinder.
The upper way of this cock controlling the port leading to the upper side of the
cylinder is by a bye-pass, or pipe placed in communication with the boilers, whilst
the other or lower port of the cylinder is placed in cominunication with the nearest
waste steam pipe.
The piston loosely fits the cylinder and steam finds its way into the cylinder
through the valve spindle guide in the cover of the valve box and fills the cylinder
both above and below the piston for the purpose of keeping the parts at a constant
temperature whilst the loose fit of the working parts at the same time facilitates
the free action of the device.
The spindle of the cock has fixed therewith a lever or handle the movements of
which are limited to the open and closed positions of the cock by suitable stops
and this lever or handle is by means of levers and chains or the like placed in
communication with the stoke-hole, the engine room, the captain's bridge or other
place in such manner, that a person realising that an accident has occurred may
move the lever or handle so as to turn the plug from its closed to its open position
when steam will pass from the boiler direct to the upper side of the piston which.
by reason of its being of larger area than the valve will close the latter and hold.
it to its seat thus effectually stopping the rush of steam and cutting off the supply.
The lever or bandle of the cock can only be moved by the chains or other
connections in one direction so as to turn the cock into its open position.
When a number of valves of the character hereinbefore described are employed
in connection with a range of boilers the handles or levers of the cocks will all be
coupled up so, that the valves will all be actuated by the one movement of the
operator.

page_text: The valve will act as a non-return or back pressure valve, that is to say it will
close when the pressure in the boiler decreases below that in the main steam pipe
leading to the engine.
In lieu of the rotary cock herein before described for placing the upper port of
the cylinder in communication with the boiler and the lower port thereof in
communication with a waste pipe, any other suitable valve such as a slide valve
may be employed.
By the means herein before described the serious accidents so common in
connection with marine boilers can be entirely avoided.
It will be understood that the device, although especially designed for marine
engines is also applicable to engines employed on land.
Dated this 7th day of March 1896.
WHITE & WOODINGTON,
27 Southampton Buildings, London, Agents.
Improvements in or connected with Stop Valves.
We, ENGELBRECHT ANDERSEN and EMIL THOMAS FLERON both of
20 Raevegade Copenhagen in the Kingdom of Denmark, Engineers in the Royal
Danish Navy 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:-
The invention relates to improvements in or connected with stop valves, and has
for its object to instantaneously shut off the steam supply from the boilers in the
case of the fracture of the steam pipes or other accident which generally permits
the steam to rush into the engine room or stoke-hole to the injury of the engineers
and stokers.
In carrying the invention into effect the stop valve is mounted within a case in
the ordinary manner and the valve spindle passes through and loosely fits a guide
formed in the cover of the valve box.
This cover forms one end of a cylinder arranged beyond the valve box, and
upon the valve rod within the cylinder is fixed a pistou of larger diameter than
the stop valve whilst beyond the piston the spindle passes through a stuffing box
provided in the cover of the cylinder and its movements are regulated by a set
screw screwing through a nut formed in the crosshead of a frame carried by the
cylinder cover.
At the side of the cylinder ports are arranged communicating with each end
thereof above and below the piston and these ways are controlled by a cock carried
by the cylinder exteriorly thereof and the plug of this cock is provided with two
ways coinciding with the ports of the cylinder.
The upper way of this cock controlling the port leading to the upper side of the
cylinder is by a bye-pass or pipe placed in communication with the boilers whilst
the other or lower port of the cylinder is placed in communication with the nearest
waste steam pipe.
The piston loosely fits the cylinder and steam finds its way into the cylinder
through the valve spindle guide in the cover of the valve box and fills the cylinder
both above and below the piston for the purpose of keeping the parts at a constant
temperature whilst the loose fit of the working parts at the same time facilitates
the free action of the device.
The spindle of the cock has fixed therewith a lever or handle the movements of
which are limited to the open and closed positions of the cock by suitable stops
and this lever or handle is by means of levers and chains or the like placed in

page_text: communication with the stoke-hole, the engine room, the captain's bridge or other
place in such manner, that a person realizing that an accident has occurred may
move the lever or handle so as to turn the plug from its closed to its open position
when steam will pass from the boiler direct to the upper side of the piston which
by reason of its being of larger area than the valve will close the latter and hold
it to its seat thus effectually stopping the rush of steam and cutting off the supply.
The lever or handle of the cock can only be moved by the chains or other
connections in one direction so as to turn the cock into its open position.
When a number of valves of the character herein before described are employed.
in connection with a range of boilers the handles or levers of the cocks will all be
coupled up so that the valves will all be actuated by the one movement of the
operator.
The valve will act as a non-return or back-pressure valve, that is to say it will
close when the pressure in the boiler decreases below that in the main steam pipe
leading to the engine.
In lieu of the rotary cock herein before described for placing the upper port.of
the cylinder in communication with the boiler and the lower port thereof in
communication with a waste pipe, any other suitable valve such as a slide valve
may be employed.
It will be understood that the device, although especially designed for marine
engines is also applicable to engines employed on land.
And in order that the said invention may be more clearly understood and readily
carried into effect we will proceed aided by the accompanying drawings more fully
to describe the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a vertical section of a stop valve constructed according to the present
invention but with the lever or handle of the cock removed.
Figure 2 is a plan thereof with the hand wheel of the regulating screw
removed.
Figure 3 is a detail view of the lever or handle of the cock, and
Figure 4 is a sectional view of a portion of the device representing a slight
modification.
In the several figures like parts are indicated by similar letters of reference.
Referring to Figures 1, 2 and 3 a represents the valve casing box or chamber,
represents the stop valve which seats upon the part a' of the casing a in the
ordinary manner, a represents the way connecting with the boiler, and a represents
the way connecting with the main steam pipe leading to the engine.
The valve is fixed upon a spindle & which passes through and loosely fits a
guide d² formed in the cover d' of the valve box a and this cover d' constitutes
one end of a cylinder d arranged beyond the valve box a whilst the other end or
cover of the cylinder d is provided with a stuffing box d through which the
valve spindle 6 passes.
The extent of movement of the valve spindle b' and consequently of the valve />
is regulated by means of a set screw e provided with a hand wheel e and working
in a nut formed in a crosshead f¹ carried by the upper ends of pillars at their
lower ends fixed with the cylinder cover whilst the screw e and hand wheel e'
also act to close the valve & upon its seat a' at the times required.
Upon the valve rod or spindle 6 within the cylinder d is mounted a piston e of
larger diameter than the valve band the piston c is fixed with the valve rod or
spindle by means of a nut 3 screwing upon a thread formed upon the rod or
spindle & the piston e taking an abutment against a collar or shoulder & formel
upon the valve rud or spindle 6' whilst the periphery of the piston e is made to
loosely fit the cylinder d.
At the side of the cylinder d are provided ports d d which communicate with
each end thereof above and below the piston c and these ways or ports d³ de are
controlled by a cock or valve g mounted upon the cylinder a exteriorly thereof and

page_text: the plug g' of this cock is provided with two ways 92 and 9" which in the turned on
position (not shown) of the plug g' coincide with the ports d d of the cylinder d'
and the ways g³ g* of the cock g.
The upper way of the cock controlling the port d' leading to the upper end of
the cylinder is by a bre-pass or pipe g' placed in communication with the way a²
connected with the boilers whilst the other or lower way g*3 of the cock controlling
the port d leading to the lower end of the cylinder'd is by a pipe g** placed in
communication with the nearest waste steam pipe.
By reason of the loose fit of the valve rod or spindle b' in the guide d and the
loose fit of the piston e in the cylinder d steam finds its way through the valve
spindle guide d' and fills the cylinder d both above and below the piston c, and thus
the parts are maintained at a constant temperature, and in the shut off position of
the cock g the piston c is kept in a state of equilibrium, whilst the loose fit of the
working parts at the same time facilitates the free action of the device.
The spindle g of the plug y' of the cock g has fixed therewith a lever or handle 4
the movements of which are limited by stops 2 shown more particularly at Figure 3
which coincide with the on and off positions of the cock, and which engage a
corresponding offset or projection & from the lever h and the lever or handle h is
by means of a chain passing round a guide pulley or by other suitable means
placed in communication with the stake-hole, the engine room, the captain's bridge,
or other place in such manner that a person realising that an accident has occurred
may move the handle or lever in the are represented by the dotted lines in Figures 2
and 3 and so as to turn the plug g' from its closed, as represented in the drawings,
to its open position, so that the ports ds d of the cylinder d are placed in communi-
cation through the hye-pass g with the boiler, and through the pipe g" with the
exhaust.
In this position of the parts any steam in or entering the cylinder d beneath the
piston c will pass away by the waste pipe whilst steam will pass from the boilers
direct to the upper side of the piston c which by reason of its being of larger area
than the valve will force the latter on to its seat a¹ and there hold it thus
effectually stopping the rush of steam by cutting off the supply.
The connection to the lever or handle h of the plug g' of the cock g should be
a chain connection as shown, or otherwise of such a character that the lever or
handle & can only be moved thereby in one direction, and so as to turn the plug g' of
the cock g into its open position.
In the example given at Figure 4 the device is substantially the same as that
described with respect to Figures 1, 2 and 3, but in this case the screw thread upo
the valve rod or spindle and the coacting nut are dispensed with and the
piston c is free to slide upon the valve rod or spindle &¹ but the collar shoulder or
Hange is retained and serves as an abutment for the piston e to act against.
This device possesses the advantage that it is easier to manufacture than that
firstly herein before described whilst it also acts more readily as a non-return
valve.
When a number of valves of the character herein before described are employed
in connection with a range of boilers the handles or levers of the cocks g should
be coupled up so that the valves will all be actuated at one time by one movement
of the operator.
The valve by reason of its being free to move within certain limits governed
by the set screw e will also act as a non-return or back pressure valve; that is to
say
it will close when the pressure in the boiler decreases below that in the main
steam pipe a leading to the engine.
In lieu of the rotary cock g'hereinbefore described for placing the upper port
in communication with the boiler and the lower port d thereof in communication
with a waste pipe any other suitable, valve such for example as a slide valve may
be employed for that purpose.
By the means herein before described the serious and sometimes fatal accidents
so common in connection with marine boilers can be entirely avoided.

page_text: It will be understood that the device although especially designed for marine
engines is also applicable to engines employed on land.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed we declare that what we
claim is :-
1. In a stop valve the combination of a valve box or casing a valve seat, a valve
adapted to close upon such seat against the steam from the boiler, a valve rod or
spindle fixed with the valve and mounted with capability of free endway movement
in suitable bearings and means separate from the spindle for regulating the extent
of movement of or closing the valve the parts being so arrauged that the valve
will automatically close by back pressure substantially as herein shown and
described.
2. In a stop valve the combination of a valve box or casing, a valve seat, a valve
adapted to close upon such seat against the steam from the boiler, a valve rod or
spindle fixed with the valve and mounted with capability of free endway movement
in suitable bearings, means separate from the spindle for regulating the extent of
movement of or closing the valve, the parts being so arranged that the valve will
automatically close by back pressure and means placed under the control of persons
at a distance such for example as the captain on the bridge of a steam vessel for
instantaneously closing the valve upon its seat at the times desired substantially as
herein shown and described.
3. In a stop valve the combination of a valve box or casing, a valve seat, a valve
adapted to close upon such seat against the steam from the boiler, a valve rod or
spindle fixed with the valve and mounted with capability of free endway movement
in suitable bearings, means separate from the spindle for regulating the extent of
movement of or closing the valve the parts being so arranged that the valve will
automatically close by back pressure, a cylinder fixed with the valve box into which
the valve spindle passes a piston of larger area than the valve loosely fitting the
cylinder and adapted to act upon the spindle to close the valve at the times desired
two ports in the side of the cylinder at the extremities thereof the upper one
communicating with the boiler and the lower one with a waste pipe, a suitable valve
for opening and closing the ports at the times desired and means placed under the
control of persons at a distance for actuating the valve substantially as herein
shown and described.
4. In a stop valve the combination of a valve box or casing, a valve seat, a valve
adapted to close upon such seat against the steam from the boiler, a cylinder fixed
with the valve box, a rod or spindle fixed with the valve and passing through the
cylinder and mounted loosely in a guide at the lower part of the cylinder and in a
stuffing box at the upper part thereof with capability of free end way movement, a
separate regulating screw working in a nut carried by a fixed frame and adapted
to act upon the valve rod or spindle so as to regulate the movement of or close the
valve a flauge or shoulder on the valve rod or spindle a piston of larger diameter
than the valve loosely fitting the cylinder and adapted to act against the flange or
shoulder of the valve rod or spindle to close the valve at the times desired, two ports
in the side of the cylinder at the extremities thereof and means placed under the
control of persons at a distance for opening the ports at the times desired and
placing the upper port in communication with a steam supply and the lower port
in communication with a waste pipe substantially as herein shown and described.
Dated this 1st day of December 1896
WHITE & WOODINGTON,
27 Southampton Buildings, London, Agents.