Improvements in Steam Traps.
Year: 1890

page_text: Date of Application, 5th Nov., 1890
Complete Specification Left, 21st July, 1891-Accepted, 29th Aug., 1891
PROVISIONAL SPECIFICATION.
Improvements in Steam Traps.
1, HARRY PARSONS, of 20, Guildford Street, Russell Square, Administrative
County of London, Engineer, do hereby declare the nature of this invention to bę
as follows:-
My invention relates to improvements in steam traps, i.e., automatic devices for
drawing off the condensed water from a steam service, such as a set of pipes for
heating by steam; and relates to that class of steam traps in which a float is
lifted by the increasing volume of condensed water within the trap, thereby
opening the water exhaust.
In carrying my invention into effect, I provide an upright tube which is con-
nected with the exhaust. This tube is blind at its top, or inner, end. A sleeve
is adapted to slide up and down the tube. This sleeve is blind at its top, or
inner, end, and it is to this end that the float is fixed.
The sleeve is adapted to discharge the function of a valve in the following way.
A scat for its edge is provided by an annular extension. of the base of the
upright tube, while the blind end of the said tube is made so as to furnish a scat
for an internal annular extension near the top of the sleeve.
Exhaust port, or ports, are made in the upright tube just above the first
mentioned seat, and a second port or set of ports near the blind end of the tube.
There are ports also in the sleeve near its top.
The effect of these last mentioned ports is to make the sleeve an equilibrium
valve by establishing the same pressure between the sleeve and the blind end of
the upright tube as that which obtains within the trap.
The sleeve is expanded annularly below the internal annular extension above
mentioned, so as to establish a communication between the ports in the top of the
sleeve and those in the top of the upright tube when the float lifts, thereby
furnishing an additional way for the escape of the condensed water, viz., through
the equilibrium chamber.
The adjacent surfaces of the tube and sleeve are fitted steam-tight to each
other, and suitable packings may be introduced to effect such fitting.
This packing may be adapted by having suitable cavities formed in.it to receive
the pressure obtaining in the trap in such a way as to force it outwards against
the external face of the sleeve. The said packing is always upon the tube.
Dated this 5th day of November 1890.
PHILLIPS & LEIGH, ·
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Steam Traps.
I, HARRY PARSONS, of No. 20, Guildford Street, Russell Square, in the
Administrative County of London, 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 improvements in steam traps, i.e., automatic devices for
the collection and discharge of the condensed water from steam pipe services, or
apparatus of any type from which it may be necessary to draw off the water of
condensation; and is applicable to that type of trap in which a float is lifted by
the increasing volume of the condensed water.

page_text: In order that my invention and the means by which it is to be carried into
practical effect may be thoroughly understood, I will describe them in detail.
referring in so doing to the accompanying drawings which are to be taken as part
of this Specification and read therewith.
Fig. 1 is a sectional elevation shewing the valve opened by the accumulation of
the water lifting the float.
Fig. 2 is a plan partly in section. It is taken on the line A-B of Fig. 1.
Fig. 3 is a sectional elevation of a modification of my invention shewing the
valve closed by the joint weight of the sleeve and the float.
Fig. 4 is a plan partly in section. It is taken on the line C-D of Fig. 3.
Fig. 5 is a sectional elevation of a further modification of the pipe and sleeve
which together constitute the valve.
Referring to Figs. 1 and 2,
e is the trap the inlet pipe; and g, the draw off pipe. These well known
parts may be of the usual, or any convenient, construction.
A is a vertical pipe, concentric with and substantially a continuation of the draw
off pipe g. The top of this pipe is blind.
is a cap or sleeve adapted to slide freely upon the pipe h. It acts as a slide
valve, and controls the ports through which the condensed water flows away.
Any necessary packing may be introduced between the pipe and the sleeve.
is the valve seat. It is formed upon an annular extension of the pipe at a
suitable height above the bottom of the trap.
k, kare the ports through which the condensed water flows from the trap into
the pipe h.
1, are perforations in the top of the vertical pipe h, and is a ring of clastic
packing lying in a correspondingly annular groove cut in the periphery of the said
pipe, but normally standing a little way off from the bottom of the groove, so
that the pressure of the water behind the packing will force it outwards so as to
press it tightly against the sleeve.
m is the float. It may be of any suitable construction; and is, of course, fast
to the sleeve i.
Referring to Figs. 3 and 4, the modification illustrated therein is confined
substantially to the abolition of the packing ", and to the addition of a second
seat upon the top of the pipe h, with a corresponding internal annulus on the
sleeve..
The object of duplicating the seats is to steady the sleeve in the closed position
of the valve.
Referring to Fig. 5, is a seat on the top of the pipe for the corresponding
surface, and k¹, are additional ports which the water reaches through the
equilibrium ports i'.
Having now particularly described and ascertained the nature of my said inven-
ion and in what manner the same is to be performed, I declare that what I
claim is,
1. The combination with a float, of a valve worked by the said float and
adapted to control ports through which the condensed water can flow into the
draw-off pipe as set forth.
2. The combination with the draw-off pipe of a trap, of a valve consisting of a
vertical pipe and a sleeve adapted to slide water- and steam-tight up and down
the said pipe, as set forth.
Dated this 21st day of July 1891
PHILLIPS & LEIGH,
22, Southampton Buildings. Chancery Lane, London, W.C.,
Agents for the Applicant