Improvements in Traps for Trapping and Discharging Condensed Liquids from Steam and other Vapours.
Year: 1891

page_text: Date of Application, 29th Oct., 1891-Accepted, 5th Dec., 1891
COMPLETE SPECIFICATION.
Improvements in Traps for Trapping and Discharging Condensed
Liquids from Steam and other Vapours.
THOMAS LEDWARD 9 Pendrell Road Brockley Kent Consulting 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:-
This invention consists in the improved arrangement and combination of a steam
trap so that the water condensed or collected in same will be intermittantly
discharged therefrom through the operation of a float and syphons and the same is
carried out in the following manner, reference being made to the annexed drawing
in which Figure 1 is a sectional side elevation of my improved steam trap. An
A hollow
outer casing or body a, is provided in which the condensed water collects.
This rod c
cylindrical or other suitably shaped float bis attached to the rod c at d.
passes up a tube e and works in the stuffing box f, and projects a sufficient distance
to enable the movement of the rod which indicates the movement of the float to be
seen, when the cap g is removed. To this rod c is connected the lever / pivoted
at i and carrying the valve plug ; which seats at k. One or more syphons are
provided which are carried by the float b.. The bottom of the tube e is closed by a
valve seating m. A suitable dome or casing n is provided carrying a removable
cap g, o is the inlet and p the outlet. The working is as follows. When the
condensed water accumulated in the body, or casing a, reaches the point q the
syphons at once begin to fill the float and as soon as its buoyancy is thereby
overcome it falls and in so doing opens the valve m, at the bottom of the tube e and
also the valve j through the medium of the rod c and lever and the condensed
water is then discharged by the action of the steam through the tube e and valve j
into the outlet p. The float bis so regulated that when the water in same has
discharged to within one inch or so of the bottom the float b will rise again and
thus close the valves. A small piper having a fine aperture communicates with
the outer chamber a for carrying off any air which is discharged along with the
condensed water.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
(1) In steam traps the combination and arrangement of the various parts
substantially as described and shewn in the annexed drawings.
(2) In steam traps the employment of a syphon or syphons attached to or in
combination with a float or floats for the purpose of rapidly filling the said float by
which means the discharge from the said trap is intermittant substantially as
described and shewn in the annexed drawings.
(3) In steam traps the employment of an air pipe connecting the upper and
lower chambers for the purpose of allowing egress of air from the lower chamber to
the outlet through the said discharge valve when the same is opened.
(4) In steam traps the indicator consisting of a rod or rods projecting through
the upper chamber and attached to or forming part of the float for the purpose
indicating the movement of the float and valve the rod being protected by a suitable
cap substantially as described and for the purpose set forth."
This 20th do of October 1801