Improvements in Steam Traps.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Steam Traps.
WILLIAM HENRY THOMPSON and ROBERT THOMPSON, 155, Fenchurch Street,
London, E.C., Engineers, do hereby declare the nature of this invention to be
as follows;-
Our invention has mainly for its object improvements in our British Patents
for Steam Traps Numbered 13748 and 14847-1897 whereby the utility of such traps
is extended by enabling them to operate under more favourable conditions par-
ticularly to pass and control the flow of larger volumes of water for the expand-
ing and contracting movement of spring or corrugated tube or tubes mentioned
in the specifications of the above patents or other expansion tubes or steam trap
apparatus for which the whole or any part of such improvements may be applic-
able.
In carrying our invention into practice we arrange the trap with a main inlet
aperture or passage (hereinafter called the main inlet) formed with or leading to
a chamber of suitable size strength and form for containing such of the aforesaid
spring or corrugated expansion tubes as may be required and to collect or hold
the desired quantity of condensed water or fluid under steam pressure draining or
expelled from the pipes or apparatus with which it may be 'connected at the
main inlet, the said chamber having also an outlet aperture leading to a passage
(hereinafter called the main outlet) by which the water or steam is discharged
from the trap, such outlet aperture being provided with a valve seating facing
to its interior so as to receive a valve (hereinafter called the outlet valve) in such
a manner as it may be closed on the seating by pressure of the steam or water
in the chamber, the outlet valve is arranged or formed with a hollow sleeve or
stem which projects centrally from it through the outlet aperture from which it
extends across and beyond the main outlet and terminates with a piston prefer-
ably of larger area than the back of the valve (hereinafter called the valve piston)
the passage through the hollow sleeve extends centrally through the valve and
valve piston, so as to form a passage for a valve spindle, which spindle passes
through and works in the passage, so that one end extends beyond the outlet
valve into the chamber where it is connected with the expansion tube, by which
it is operated (as hereinafter mentioned) while its other end extends beyond the
valve piston into the cylinder in which the said piston works and is provided
with a valve (hereinafter called the operating valve) presented to a valve seating
on an inlet aperture (hereinafter called the operating inlet) which is preferably
arranged in such relation to the main inlet that the water or fluid entering the
07

page_text: trap may be directed on or pass over it in such a manner as to direct its pressure
on the operating valve on its way to the chamber (but it may be conducted from
the chamber or other part of the trap) for admission to the cylinder for operat-
ing the piston, its admission to the cylinder being controlled by the operating
valve acting in conjunction with the aforesaid expansion tube with which its
spindle aforesaid is connected by parts or mechanism similar to that described in
the specifications of the herein before mentioned patents for connecting the valve
to and operating it by the spring or corrugated tubes or any modification of the
same (or any other suitable mechanism) according to the tube selected for im
parting the necessary movement to the aforesaid operating valve, which instead
of being connected with the spindle may be free so as to return or keep to its
seating (with which it may be arranged for removal or examination or renewal
as described in the aforesaid Specification of Patent Number 13748) while the
spindle is drawn from it by the contraction of the expansion tube, or be closed
and held so by the thrust of the spindle again forced on by the expanding move-
ment of the expansion tube, the outlet valve is closed and held so by the pres-
sure of the steam or water in the chamber acting on its back surface or surface
presented to and contacting with the steam or water (hereinafter called the back
of the valve) when the valve is resting on its seating, and it is opened by the
pressure of the steam or water admitted to the cylinder (by the operation of the
operating valve) acting on the valve piston the area of which is so much larger
than that of the back of the outlet valve as may be necessary to multiply the
force of the steam or water to such an extent as will enable the piston to over-
come the pressure on the valve and advance so as to open it and keep so, until
the pressure is cut off from the cylinder by the closing of the operating valve,
relieved of this opposing pressure the outlet valve owing to the pressure at the
back of it commences to close and continues moving back with the piston until
reaching its seating, both it and the operating valve are in their proper relative
positions for repeating the operation of advancing the piston and opening the
outlet valve the piston in its backward movement having expelled the water or
steam (by which it was advanced) from the cylinder into and through an exit
pipe or passage preferably discharging into the main outlet.
In order to utilize this action of expelling the water or steam from the cylinder
for determining the period for which the outlet valve is to remain open, we pre-
ferably arrange the exit pipe from the cylinder to the main outlet wholly or par-
tially outside the trap so as to be arranged with a suitable cock or valve or other
adjustable or exit-closing device immediately accessible for regulation or adjust-
ment, the object of such cock or valve being to control the closing movement of
the outlet valve by retarding the return or backward motion of its piston, by
closing the exit pipe or passage to such a degree as may be required to retard the
speed of the piston so limiting the outflow until the time occupied in the expul-
sion of the water from the cylinder is as nearly as possible equal to the period
necessary for the passage of the accumulated water from the trap through the
outlet valve. The operation is as follows:-The trap being cold when the steam
is turned on and the expansion tube contracted to its normal condition so as
to open the operating valve and admit of part of the volume of steam or water
entering the cylinder and acting on the valve piston with sufficient force to ad-
vance it so as to open the outlet valve out of which the bulk of the steam and
water passing from the main inlet into the chamber continues flowing into the
main outlet until by its contact with the expansion tube it has raised its tem-
perature sufficiently to expand it with the force necessary for closing the operat-
ing valve so as to cut off the pressure of the steam and water from the piston,
and the outlet valve being relieved of this opposing force of the piston commences
and continues to close as fast, as the pressure behind it will overcome resistance
offered to its piston in expulsion of the. water or fluid from the cylinder, such
resistance being regulated by the setting or adjustment of the cock or valve

page_text: arranged with the exit passage through which the steam or fluid is forced or
discharged into the main outlet, the operating and outlet valves being closed
remain so, and the trap stops working until the expansion tube is sensibly
affected by the lowering temperature of the water or fluid accumulating in the
chamber or other parts of the trap until it contracts or sufficiently returns to
its normal condition, so that it again opens the operating valve, when the opera-
tion is repeated and the repetition continues while the steam is on.
The expan-
sion tube instead of working the operating valve by a valve rod passing through
and working in a passage formed centrally through the outlet valve, sleeves, and
piston, may be located in a suitable chamber arranged parallel to the cylinder so
as to operate the operating valve on a line apart from and parallel to the line of
operation of the piston and outlet valve, both valves being connected by suitably
arranged passages or the arrangement of such parts or passages may be otherwise
varied so as to be adapted to any desired variation in the design of the trap, as
also may the cocks, valves, controlling mechanism or other parts be adapted to
various modifications or designs of the trap which is arranged or formed with
suitable bearings and guides for supporting or directing the action of the
mechanism or parts aforesaid.
Instead of the valve piston being operated by water or fluid entering the trap
(as hereinbefore mentioned) it may be operated by steam conducted to it by con-
necting the operating aperture with a convenient steam pipe. The outlet valve,
its sleeve or piston may be provided with a gland and formed so as to receive
such packing as may be required and they may be arranged with a suitable
spring acting so as to assist the whole or any part of their movement. In order
to observe the action of the trap it may be arranged preferably with a dial
marked with suitable indications and traversed by an index hand radiating on a
spindle provided with a pinion so as to be operated by a rack on the sleeve or
otherwise connected with the outlet valve and its piston to which an index hand
may be attached so as to move over the face of an index parallel to the motion,
or the index hand may be operated by a lever or other suitable mechanism for
indicating the movement of the outlet valve or piston or similar indicating
indexes parts or mechanism may be arranged to work in conjunction with the
expansion tube, valve, spindle or operating valve preferably from an extension
of the valve spindle beyond the outside of the trap so as to facilitate observations
of the action of the operating valve, the provision for observation may include
a glass guage for indicating the quantity of water in the trap, or thermometer,
for indicating its temperature, located in or on a convenient part of it.
expulsion or flow of the water or steam from the cylinder may be automatically
regulated by arranging the exit pipe or passage with a slide or circular valve
or other valve (hereinafter called the exit valve) suitable for operation by the
movement of the outlet valve or its piston, with which they are connected or
operate in conjunction by a lever or other suitable mechanism preferably so as
to have an opposite movement or to close the exit valve during the period the.
piston is advancing in the act of opening the inlet valve and to
open it during the period the piston is returning by the closing
of the outlet valve also the movement of the expansion tube valve,
spindle and operating valve may be utilized for operating the afore-
said exit valve by connecting them with it by suitable mechanism (as
aforesaid) for communicating the movement of the expansion tube to the valve
in such a manner as to open it during the period of closing the operating valve,
and to close it during the period of opening the said valve.
The
In another part of our invention we multiply the movement of the spring tube
(or tubes) mentioned in Specification of Patent 13748/1897 aforesaid by connect-
ing the said tube with a lever (instead of to the valve as therein mentioned) at
a suitable distance from the fulcrum on which the lever takes its bearing and
connect the valve or its rod or other part with the said lever at such further

page_text: distance from the fulcrum as may be necessary to multiply the expanding and
contracting movement of the spring tube so as to reciprocate the valve to and
from its seating the required distance to admit of its passing a larger volume of
water than the direct action of the spring, tube or the valve would admit of, as
the expansive force directed by the tube on the said valve would be diminished
in proportion to its increased movement at each expansion or contraction of the
tube, we provide for this by connecting or arranging the said valve with a suit-
able piston, working in a cylinder opening into or having a passage leading
from a passage (hereinafter called the inlet passage) so arranged as to conduct the
water or steam (entering from the pipe or apparatus with which it is connected)
to the valve through which it is discharged into that part of the trap in which
the spring tube and the outlet from the trap is located, the water or steam held
in or passing through the inlet passage enters the passage leading to the piston
on which it directs its force in such a manner as to counterbalance the pressure
on the valve so that the expanding and contracting force of the spring tube is
practically only expended in disturbing the balance when operating the valve,
the rod connecting the valve with the piston may work in a suitable gland if
necessary to prevent leakage from the cylinder. The corrugated tube mentioned
in Patent Number 14847/1897 aforesaid may be connected to the lever and
adapted for operating the valve and piston in substitution for the spring tube or
any other suitable expansion tube or device may be similarly adopted and if more
expedient instead of employing a lever or levers for multiplying the movement of
the tube a rack may be formed or arranged on the spindle or rod connecting the
valve with the piston so that it may be operated by a pinion gearing both into
it and into a fixed rack, the said pinion being connected with the spring, corru-
gated or other tube, connecting rod or rods, or other suitable connections so as to
move over the fixed rack with the expansion and contraction of the tube and
carry or reciprocate the valve and piston to and from the seating. The moving
parts and mechanism here mentioned may be mounted in bearings or guides
formed and arranged as may be deemed most suitable according to the varying
conditions of working and design of trap.
Sontember 20th 1807
W. H. THOMPSON,
ROBT.
THOMPSON,
COMPLETE SPECIFICATION.
Improvements in Steam Traps.
WILLIAM HENRY THOMPSON, and ROBERT THOMPSON, 155, Fenchurch Street,
London, E.C., Engineers, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:
Our invention has mainly for its object improvements in our British Patents
for Steam Traps Numbered 13748 and 14847-1897 whereby the utility of such traps
is extended by enabling them to operate under more favourable conditions par-
ticularly to pass and control the flow of larger volumes of water for the expand-
ing and contracting movement of spring or corrugated tube or tubes mentioned
in the specifications of the above patents or other expansion tubes or steam trap

page_text: expansion apparatus for which the whole or any part of such improvements may.
be applicable.
In carrying our invention into practice we arrange the trap (see elevation partly
in section Figure 1 and plan partly in section Figure Sheets 1 and 2) with an
inlet passage A (hereinafter called the main inlet) leading to or formed with a
chamber S of suitable size, strength and form for containing and admitting of
the operation of the spring or expansion tube B. (hereinafter called the spring
tube) and its connection with the valve spindle J (as hereinafter mentioned) and
collecting and holding the desired quantity of condensed water or fluid under
pressure, draining or expelled from the pipes or apparatus with which the trap
may be connected at the main inlet A, the chamber S having also an aperture
leading to the passage or outlet U (hereinafter called the main outlet) such aper-
ture being arranged with a valve seating T; with outlet V (hereinafter called the
valve outlet) such valve seating facing the interior of the chamber so as to
receive the valve W (hereinafter called the outlet valve) in such a manner that
it may be closed on the seating by the pressure of the steam or fluid contained in
the chamber S, the said outlet valve is arranged or formed with a hollow sleeve
or stem X, projecting centrally through the valve outlet from which it extends
across and beyond the main outlet U and terminates with a piston Y (hereinafter
called the valve piston) operating in the cylinder Y¹ prepared to receive it, such
piston having a larger area than the surface of the back of the outlet valve W,
presented to the pressure of the steam or fluid in the chamber S; the passage Z
extends through the outlet valve sleeve and piston so as to receive the valve
spindle J and admit of its working with the spring tube with which it is
connected by the connecting rods E, E, working on and extending from the bear-
ing or studs F at its operating end, to those on the crosshead and screw K on the
valve spindle which spindle extends beyond the crosshead and passes through a
hollow tube J (by which the stationary end of the tube is secured to the cham-
ber) to the outside of the trap beyond which it extends a sufficient distance to
admit of its operating and being fitted with the regulating wheel hy the turn-
ing of which it is adjusted into proper working relation with the operating
valve C and its seating G, which operating valve is not attached to the said spindle
but kept in contact with it by the shank (c) at the back of the valve working
freely in a hole bored centrally in the end of the valve spindle to receive it so
as to admit of the valve spindle thrusting the valve to its seating and holding
it closed by the expansive movement and force of the spring tube B and at the
same time be free to recede with the spindle when it is being drawn back by
the contraction of the said tube, which receding movement of the valve spindle,
it is caused to follow by the pressure of the steam or fluid being directed to it
through the inlet aperture in its seating G being connected with the passage C¹
leading from the chamber and admit of its being closed and held to its seating
by, the water or fluid contained in the cylinder under the pressure of the valve
piston Y during the operation of closing the outlet valve as hereinafter men-
tioned; the valve spindle J is set into proper relation with the operating valve C
and its seating G by turning the regulating wheel 0 as described in the afore-
said Specification No. 13748-1897; the valve C therein mentioned being employed
in these improvements as an operating valve for admitting and controlling the
passage of part of the steam or the water under its pressure to the cylinder so as
to act on the valve piston Y with a force in proportion to the area of the said
piston, which area is so much in excess of the area presented by the back of the
outlet valve W to the steam pressure contained in the chamber S as to ensure
the piston overpowering the force closing the valve (although both are subject
to the pressure of the steam contained in the chamber S) and opening it so as to
admit of the discharge of the fluid or condensed water from the chamber through
the valve outlet V into the main outlet U in a volume in proportion to the area
of the valve outlet and the extent to which the valve is forced open by the piston

page_text: from its seating to its fullest outlet capacity which is not entirely dependent on
the expanding and contracting movement or travel of the operating end of the
spring tube as in the aforesaid Patent No. 13748–1897. When the trap has to
pass a large volume of fluid or water at each operation it will be essential to its
successful action to be able to determine the period that the outlet valve W shall
remain open which we effect by utilizing the action of the piston in expelling the
fluid or condensed water from the cylinder Y¹ (in the operation of forcing open
the outlet valve as aforesaid) by arranging the said cylinder with an exit pipe or
passage (a) provided with a suitable regulating valve or cock (b) for closing the
exit passage so as to check the exit of the fluid or water to such an extent that
it opposes the return of the piston and the closing of the outlet valve under pressure
as aforesaid and retards its return to its seating T for a period determined by the
time it takes the water exiting from the cylinder (under pressure of the piston)
to pass the regulating valve (b) on its way to the main outlet into which it is dis-
charged from the pipe (a). The regulating valve (b) may be automatically
operated by each stroke or movement of the outlet valve and its piston or the
operating valve, which although it may be attached to and work with the spindle J
is preferably left free to close by the pressure of the fluid or water acted on by the
piston as aforesaid so as to more effectually divert the fluid or water in the
cylinder to the exit pipe (a).
Under some applications of the trap the conditions of working may be such
that varying temperatures of the steam or water contained in the trap or cham-
ber S may be sufficient to expand the valve spindle J to such a degree that it
may be utilized for operating the operating valve and so dispense with the spring
tube; in such utilization the hollow passage through the bolt J would be screwed
so as to form a nut to receive an extension of the screw at K which screw would
be continued to the wheel O and would work in the said nut so that by turning
the wheel the valve spindle may be regulated to and from the operating valve C
and its seating so as to be set into proper working relation with them and so set
or held by the nut. Figure 3 Sheet 3 shows the arrangement of the spring
tube B valve C and mechanism and parts forming the trap as shown in Figs. 1
and 2 Sheet 4 of the aforesaid Specification No. 13748-1897 in combination with
the cylinder Y chamber S outlet valve W and seating T and piston Y and
stem X and exit pipe pipe (a) and regulating valve (b) in which the valve C'is
employed as operating valve for admitting the pressure of the steam or water to
the piston and so open the outlet valve and operate it in conjunction with the
exit passage (a) and regulating valve (b) and steam pressure contained in the
chamber as herein before mentioned. This arrangement admits of the trap as
described and shown in Specification of Patent 13748-1897 discharging small
quantities of condensed water without operating the outlet valve by opening the
valve (d) controlling the outlet aperture R so as to let the water escape there-
from, the closing of the valve (d) diverts the steam pressure and water to the
piston for operating the outlet valve as aforesaid: the arrows indicate the passage
of steam or water in chamber S to the cylinder Y and piston Y.
Figure 5 Sheet 4 shows the arrangement by which the operating valve C is
operated by an expansion tube B arranged with corrugations and sealed by a
plug or other suitable method at each end and charged with a volatile spirit or
other liquid or matter rapidly susceptible to variations of temperature
-the said expansion tube and operating valve being adjusted into proper working.
relation with the operating valve seating G by turning the screw and wheel O
in the required direction so that when the trap or chamber S is charged with
steam or water directed to it from the pipes or apparatus with which it is con-
nected it expands and becomes sufficiently elongated to thrust the valve on the
seating G and hold it closed until the declining temperature in the steam and
water admit of its contracting or receding in which action it opens the valve and
admits the steam or water under pressure to the piston Y-the trap operating in
the same manner as Figs. 1 and 2 Sheets 1 and 2 as shown by the reference
letters and description.

page_text: Figure 5 is a modification of Figure 5 in which the expansion tube B is
arranged by the side of or parallel with the outlet valve and its piston, the trap
operating in a similar manner to Figs. 1 and 2 Sheets 1 and 2 as shown by the
reference letters. The expansion tubes instead of being arranged with corruga-
tions may be plain throughout as indicated by the chain dotted lines on the
tube B Figure 5.
The form and arrangement of the outlet valve W and its seating T and the
operating valve C and its seating G and the expansion tubes herein described
and shown by the various figures may be varied to accommodate it or them to
any variation in the design or arrangement of the trap without departing from
the combination and operation of mechanism and parts forming our invention.
Figures 4 & 6 Sheet 5 illustrate methods of automatically operating the regu-
lating valve (b). Figure 4 shows it connected with and operated by the valve
spindle (e) by means of a lever (f) and link (g) formed with a slot (2) which
admits the pin (r) at the end of the valve lever (h) operating the lever with an
instantaneous action derived from the force of the spring (s) acting on the cam (t)
so that when the expansion tube with which the valve spindle may be connected
with is relaxed and the outlet valve opens the regulating valve (b) is open also
and when the expansion of the tube causes the spindle to advance (in the action
of closing the valve) and radiate the lever so as to pull the pin (r) resting at
the end of the slot furthest from the lever and so draw the lever over in the act
of closing the valve inlet the centre point on the cam is passed when the pressure
of the spring instantly completes the opening which is permitted by the passage
of the pin through the slot until it reaches the end of it nearest the lever by
which end it is thrust back on the. relaxation of the tube and recession of the
spindle until it passes the centre point of the cam when the spring again acts. on
the cam so as to complete the action, these being aternately repeated in order to
operate so as to retain or admit of the escape of the water for controlling the
movement of the piston as herein before mentioned.
Figure 6 is a modification of Figure 4 in which the valve is operated by its
connection with the sleeve a of the piston Y as shown.
Fig. 7, Sheet 5, shows an arrangement of index hand S in combination with
the hereinbefore mentioned operating valve so that the said hand may move with
the valve and the extent of its movement be indicated on the index 0, which
index may be set out or marked off as required for measuring or indicating the
extent of the movement or action of the valve.
Figure 8, Sheet 5 shows an arrangement of the index hand S in combination
with the hereinbefore mentioned outlet valve, so that the movement of the sai
valve may be communicated to it by means of a rack formed on the hollow sleeve
or stem (or other suitable part) of the valve so as to gear with and operate a
pinion connected with the index hand S, so that the reciprocating movement of
the valve is communicated.to the index hand in such a manner as to cause it to
radiate, to and fro over the surface of the index or dial o, so as. to indicate the.
movement or action of, the outlet valve-the index or dial may be set out or
marked off according to requirements as aforesaid.
In order to increase the outlet capacity of the valve C, described and shown
in Specification No. 13748--1897 we arrange it, as shewn in Fig. 9 Sheet 6 with
a piston Y and. cylinder Y', the piston being of such an area as to balance or
approximately balance the pressure of the steam or water acting on the said
valve and also directed to the piston Y (so as to act on its inner surface or that.
surface presented to the valve face) by the passage C, so that the expanding and
contracting force of the spring tube B is only employed in disturbing the balance
which admits of the employment of multiplying mechanism for communicating
the movement of the spring tube to the valve which movement is multiplied by
means of the lever to which the connecting rod extends from the operating
end of the spring tube so as to be connected with the lever by the joint at v
so as to admit of the movement of the tube radiating the lever on its fulcrum w
r

page_text: at the one end while the other end of the lever extends to the stem X (connecting
the valve and piston) which end is formed with a fork y so as to admit of its
connection with an adjustable crosshead N provided with studs yl working in
slot y, in the lever fork or other suitable bearings which fork and studs are
at such distance from the fulcrum w and in such relation with point at which
the lever is connected with the connecting rod E as may be necessary to multiply
the movement of the spring tube so as to give the desired travel for opening the
valve to its fullest capacity--the valve is adjusted into proper working relation
with its seating and the spring tube by the wheel 0 and screwed spindle K and
it is operated by the expansion and contraction of the spring tube when sub-
ject to the various temperatures of the steam or water directed to or passing
through the trap as described in the aforesaid specification.
Assuming the spring tube B to be in its normal position and the valve C open
when the steam or water enters the trap through the inlet A it will blow through
the trap until it has raised the temperature of the spring tube sufficiently to
cause its expansion so that the expansive force and movement may assist the
piston Y under pressure of the steam in closing the valve to which the said
expansive movement is communicated by means of the connecting rod E acting
on the lever u, so as to radiate it and cause it by its connection with the stem X
to close the valve C which is held closed by the combined pressure of the steam
acting on the piston and the expansive force of the spring tube until the tem-
perature of the accumulated water of condensation (retained in the trap by the
closing of the valve) falls sufficiently to admit of the spring tube cooling and
contracting and by its contracting movement relax its pressure on the lever w
and valve C and assist the steam pressure acting on the valve in forcing it open
against the opposing pressure of the steam also acting on the piston, the steam
having blown the water out of the trap it again raises the temperature of the
tube so as to close the valve and the operation is repeated by the alternate con-
tracting and expanding movement and force of the spring tube controlling the
action of the valve as aforesaid—any leakage of water past the piston Y into the
cylinder Y¹ is conducted into the outlet passage U by means of the pipe a
Figure 10, Sheet 6, shows a modification of Figure 9 aforesaid, in which the
pinion p, and fixed rack r¹ and rack 2 moving with the valve and piston is
substituted for the lever by which the valve outlet capacity is increased by the
pinion p¹ imparting double the travel to the valve C-it receives from the move-
ment of the spring tube B through the medium of the connecting rod E the
said valve being adjusted by a screw s and controlled in its operation by the
expanding and contacting action of the spring tube affected by the varying tem-
perature of the steam or water entering or passing the trap as aforesaid, the opera-
tion of the trap may be reversed by employing the passages U as an inlet and A
as an outlet.
A tube B arranged with corrugations or other expansion tube or device as here-
before mentioned may be arranged in combination with the lever or pinion in
substitution for the spring tube so as to operate valve C as aforesaid.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare what we
claim is:-
Firstly We claim the arrangement and combination of the outlet valve and
its seating and valve piston and cylinder and exit passage and its regulating valve
or cock with the spring tube and valve spindle and operating valve and seating
and chamber and parts by which they are connected or with which they operate
so as to retain and control the flow of the steam or water or direct the condensed
water to the main outlet of the trap substantially in the manner and for the pur-
poses herein described and shown by Figs. 1 and 2 Sheets I and 2 of the draw-
ings hereto annexed.
Secondly We claim the application and utilization of the expanding and con-

page_text: tracting movement or force of the valve spindle for operating the operating valve
without the assistance of the spring tube B, substantially in the manner and for
the purpose herein described in reference to Figures 1 and 2 of the drawings
hereto annexed.
Thirdly We claim the arrangement and combination of the spring tube B
and valve C and mechanism and parts connected therewith forming the trap
(described and shown by Figures 1 and 2 Sheet 4 of the aforesaid Specification
No. 13748-1897 or applicable modification thereof) with the outlet valve and its
seating and valve piston and its cylinder and exit pipe or passage and regulating
valve and parts for retaining and controlling the steam pressure and directing
the flow of the condensed water to the main inlet, substantially in the manner
and for the purposes herein described and shown by Figure 3 of the drawings
hereto annexed.
Fourthly We claim the arrangement and combination of the outlet valve and
its seating and valve piston and cylinder and its exit passage and regulating valve
with the corrugated tube or tubes arranged with corrugations (or other expansion
tube) and operating valve and seating and parts by which they are connected or
with which they operate so as to retain and control the steam pressure and direct
the condensed water to the main outlet of the trap, substantially in the manner
and for the purposes herein described and shown by Figures 5 and 5* of the
drawings hereto annexed.
Fifthly. We claim the arrangement of the outlet valve and its seating and
valve piston and cylinder and its exit pipe or passage and regulating valve in
combination with the operating valve and seating so that the steam pressure
contained in the trap is directed on to the back of the outlet valve so as to keep
it closed and at the same time admit of such steam pressure being controlled by
the operation of an operating valve so as to act on the valve piston and cause
it to force open the outiet valve and release the condensed water and be again
closed by the steam pressure such operation being repeated at intervals regulated
by a suitable expanding and contracting device or compound effected by the
varying temperatures of the steam, fluid or condensed water contained in or
directed to the trap substantially in the manner and for the purposes herein
described and shown by Figures 1, 2 3 4 5 6 7 & 8 of the drawings hereto
annexed.
Sixthly. We claim the arrangement of the operating valve so as to be worked
free and be closed either by the pressure of the water acted upon by the valve
piston or by the thrust of the spring or other expansion tube substantially in the
manner for the purposes herein described & shewn by Figures 1 & 2 of the draw-
ings hereto annexed.
Seventhly. We claim the arrangement and combination of the regulating
valve (b) with the exit pipe or passage and cylinder and outlet valve and its seat-
ing and piston and the operating valve, substantially in the manner and for the
purposes herein described and shewn by Figures 1, 2, 3, 4, 5, 6, 7 & 8 of the draw-
ings hereto annexed.
Eighthly. We claim the arrangement and automatic operation of the regulat-
ing valve (6) in conjunction with the operating valve and valve spindle, or the
outlet valve and piston by means of mechanism & parts, substantially in the
manner and for the purposes herein described and shown by Figures 4 & 6 of
the drawings hereto annexed.
Ninthly. We claim the arrangement and combination of indexes, or dial and
index hands, with the trap operating and indicating the movement of the outlet
valve and its piston or the operating valve, substantially in the manner and for
the purposes herein described and shewn by Figures 7 & 8 of the drawings hereto
annexed.
Tenthly. We claim the arrangement and combination of the mechanism and
parts for operating and balancing the pressure acting on the valve C, and multi-
plying the motion communicated to it by the spring or other expansion tube,

page_text: substantially in the manner and for the purposes herein described & shewn by
Figures 9 & 10 of the drawings hereto annexed.
Lastly. We claim the improved general arrangement and combination of
mechanism and parts for retaining and controlling the flow of the steam or con-
densed water, under its pressure substantially in the manner herein described &
shown by the annexed drawings Sheets 1, 2, 3, 4, 5, 6.
W. H. THOMPSON.
ROBT.
THOMPSON.