Improvements in Steam Traps.
Year: 1890

page_text: Date of Application, 6th Nov., 1890
Complete Specification Left, 10th June, 1891-Accented 11th July
ACCA
PROVISIONAL SPECIFICATION.
Improvements in Steam Traps.
I, JOHN JAMES ROYLE of 131 Great Bridgewater Street, Manchester,
Mechanical Engineer do hereby declare the nature of my said invention to be as
follows:--
This invention refers to an improved arrangement of parts constituting a steam
trap which shall be simple and cheap to construct and efficient in operation.
The invention consists essentially of an improved mode of balancing the valve of
a steam trap so that the float shall experience the least possible resistance in
opening the valve even under a considerable pressure; and consists of a valve
formed on the end of a spindle set vertically in a suitable casing-the spindle is by
preference hollow and is carried up and terminates in a prepared end the
diameter of which is about equal to the area of the valve before mentioned at the
opposite end of the spindle.
A. cap or thimble is fitted over the end of the spindle and rests in the metallic
casing. The effect of this combination is to relieve the valve entirely of load
lue to the steam pressure, and it can be put into partial or perfect equilibrium at
pleasure, so that by surrounding the spindle by a hollow or other float the valve
s lifted with the greatest case and certainty when water of condensation accumu-
ates in the casing and about the float. A suitable valve may be arranged in the
asing, by preference over the spindle, and closing with the steam, to allow of an
scape of air.
Dated this 5th day of November 1800.
JOHN G. WILSON,
Patent Office, 55, Market Street, Manchester, Agent for the Avulicant
COMPLETE SPECIFICATION.
Improvements in Steam Traps.
I JOHN JAMES ROYLE of 131 Great Bridgewater Street, Manchester,
Mechanical Engineer do hereby declare the nature of my said 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 refers to an improved arrangement of parts constituting a steam
trap which shall be simple and cheap to construct and efficient in operation.
And in order that this my invention may be more clearly understood and more
readily carried into effect I have hereunto annexed a sheet of drawings and will
now proceed to describe the same by the aid of the figures and letters of reference
marked thereon. That is to say :-
Fig. 1 is an exterior view Fig. 2 a sectional view and Figs. 3 and 4 and 5
detail views of my improved steam trap.
This invention consists essentially of an improved mode of balancing the valve
of a steam trap so that the float shall experience the least possible resistance in
opening the valve even under a considerable pressure, and consist of a valve A
formed on the end of a spindle B set vertically in a suitable casing C the spindle B
is by preference hollow and is carried up and terminates in a prepared end D the
liameter of which is about equal to the area of the valve before mentioned at the
opposite end of the spindle.
A cap or thimble E is fitted over the prepared end D of the spindle and rests
n the metallic casing C a plug C³ completes the casing.
Pin17

page_text: The effect of this combination is to relieve the valve A entirely of load due to
the steam pressure and it can be put into partial or perfect equilibrium at pleasure
by varying the diameter of the spindle at D so that by surrounding the spindle by
a hollow or other float F the valve is lifted with the greatest ease and certainty
when water of condensation accumulates in the casing Centering through the inlet
pipe G.
In Fig. 2 the area of the prepared end D of the spindle is about equal to the
area of the valve A and would be in perfect equilibrium. The thimble E should
be fitted somewhat slack thereon to ensure easy working and any steam that
might pass is conveyed off by the passage formed through the spindle B and
discharged into the outlet with the water of condensation. I have found this
device effective in balancing the valve A but it will be obvious that the same effect
would be obtained by the spindle passing through a bored hole to the outside of
the casing but such an arrangement would be much more likely to bind the spindle
when tightening down the bolts H by which the valves of the casing are held
together.
Fig. 3 shows a modification of the spindle mounting in which the thimble is
dispensed with and the contingency is overcome by brass liner I fitted into the
casing the bearing at J being made as narrow as possible and a ground fit. Fig. 4
shows the same end attained by packing the spindle round with asbestos. In all
three devices it is practically impossible to keep the spindle steam tight without
binding it and a slight escape of steam takes place which I prefer to carry away
through the hollow spindle into the outlet as the best means of disposing of it.
Fig. 5 illustrates a valve formed in the plug C and which could be used in con-
nection with Fig. 2 as an air valve. The valve C2 closing with the steam in a
manner well known to those familiar with the action of steam traps.
Having thus particularly described and ascertained the nature of my said inven-
tion together with the best means with which I am acquainted for carrying the
same into practical effect I declare that I do not confine myself to the precise
details relative proportions or dimensions as the same may be considerably varied
without departing from the invention but what I claim is :-
1. The improved arrangement of parts forming a steam trap substantially as
herein before described and illustrated on the accompanying drawing.
2. In a steam trap a float F operating a spindle B of which the lower end is
formed as a valve and the upper end used to relieve the said valve of load
substantially as hereinbefore described and illustrated on the accompanying
drawing.
Dated this 9th day of June 1801
JOHN G. WILSON,
Patent Office, 55, Market Street, Manchester, Agent for the Applicant.