IMPROVEMENTS IN STEAM TRAPS
Year: 1884

page_text: We HENRY HYDE Commercial Traveller and WALTER EASTWOOD Brass Founder
both of Ashton-under-Lyne in the County of Lancaster do hereby declare the
nature of our invention for IMPROVEMENTS IN STEAM TRAPS to be as follows:-
This invention relates to the construction of what are known as "steam traps"
which are employed for the purpose of removing the condensed water from steam
pipes without allowing of the escape of the steam, and the invention is applicable
more particularly to that class of steam traps wherein the escape valve is closed by
the expansion or elongation of a copper tube which takes place as soon as the steam
(which is at a high temperature) attempts to follow the water.
Steam traps of this class are liable to two defects (1.) That inasmuch as the
valve was always placed at the end of the expansion pipe, the area of the valve
was always limited by the diameter of the pipe, and as the amount of expansion
and contraction of the pipe required to close the valve was very slight, the full
area could not be utilized, and (2) that in consequence of the valve being at the
bottom of the expansion pipe it was very liable to become choked with dirt or
other matter.
In order to remedy these defects we leave the end of the expansion tube entirely
open so that any dirt or scale that comes down with the water falls to the bottom
of the vessel or receiver and can be cleaned out when required.
In the top of the vessel or receiver we form a valve seating of a much larger
diameter than the expansion pipe and on the end of the latter we screw or fix
a short piece of brass or other tube of the same internal diameter passing through
the centre of this seating and having cast on its outside a valve fitting into the
said seating.
This valve and seating are made of such a diameter as shall correspond when
only very slightly raised with the area of the expansion pipe, and as the valve is
at the top of the vessel or receiver, any dirt or scale entering through the pipe
with the water falls down to the bottom of the vessel and nothing but clean water
flows off through the valve.
Dated the 20th der of Ton 1884
GEORGE DAVIES,
. Agent for the Applicants.

page_text: "
We HENRY HYDE Commercial Traveller and WALTER EASTWOOD Brass Founder
both of Ashton-under-Lyne in the County of Lancaster do hereby declare the
nature of the invention for "IMPROVEMENTS IN STEAM TRAPS and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
"
This invention relates to the construction of what are known as steam traps
which are employed for the purpose of removing the condensed water from steam
pipes without allowing of the escape of the steam, and the invention is applicable
more particularly to that class of steam traps wherein the escape valve is closed by
the expansion or elongation of a copper tube which takes place as soon as the
steam (which is at a high temperature) attempts to follow the water.
Steam traps of this class are liable to two defects (1) That inasmuch as the valve
was always placed at the end of the expansion pipe, the area of the valve was
always limited by the diameter of the pipe, and as the amount of expansion and
contraction of the pipe required to close the valve was very slight, the full area
could not be utilized, and (2) that in consequence of the valve being at the bottom
of the expansion pipe it was very liable to become choked with dirt or other
matter.
Our invention is designed to remedy these defects and the nature of our said
invention and the manner in which the same is to be performed will be readily
understood on reference to the accompanying drawing, and the following explanation
thereof.
The lower part of the drawing is made in sections in order the better to illustrate
our invention-a, a is the steam trap or receiver, b, b are two tension rods
supporting the cross bar c, c to which one end of the copper expansion tubo d, d
is fixed.
We leave this end of the expansion tube d, d entirely open so that any dirt or
scale that comes down with the water falls to the bottom of the vessel or receiver a, a
and can be cleaned out when required.
In the top of the vessel or receiver a, a we form a valve seating f. f of a much
larger diameter than the expansion pipe d, d and on the end of the latter we screw
or fix a short piece of brass or other tube c, c of the same internal diameter passing
through the centre of the seating f, f and having cast on its outside a valve h, h
fitting into the said seating f, f.
This valve h, h and seating f,f are made of such a diameter as shall correspond
when only very slightly raised with the area of the expansion pipe d, d and as the
valve h, h is at the top of the vessel or receiver a, a any dirt or scale entering
through the pipe d, d with the water falls down to the bottom of the vessel a, a
and nothing but clean water flows off through the valve.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is, in a steam trap of the class above referred to, the combination with
the open end of the expansion tube of a valve of much larger diameter than the

page_text: tube and acting against a valve seating formed in the upper part of the trap or
receiver, substantially in the manner and for the purposes hereinbefore set forth
and described.
GEORGE DAVIES,
Agent for the Applicants,
4, St. Ann's Square, Manchester.