IMPROVEMENTS IN THE ARRANGEMENT AND CONSTRUCTION OF ⚫ STEAM TRAPS' OR APPARATUS FOR DIS- CHARGING THE WATER RESULTING FROM CONDENSED STEAM FROM STEAM PIPES OR APPARATUS WHERE STEAM IS EMPLOYED
Year: 1870

page_text: :
PROVISIONAL SPECIFICATION left by Frederic Ludovicus Henri
William Bünger at the Office of the Commissioners of Patents,
with his Petition, on the 2nd March 1870.
I, FREDERIC LUDOVICUS HENRI WILLIAM BÜNGER, of Paradise Road,
Clapham Road, in the County of Surrey, Civil Engineer, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN THE
ARRANGEMENT AND CONSTRUCTION OF ⚫ STEAM TRAPS' OR APPARATUS FOR DIS-
CHARGING THE WATER RESULTING FROM CONDENSED STEAM FROM STEAM PIPES OR
APPARATUS WHERE STEAM IS EMPLOYED," to be as follows:-
This Invention relates to improvements in the arrangement and
construction of "steam traps" or apparatus for discharging the water
resulting from condensed steam from steam pipes or apparatus where
steam is employed, such improved steam traps acting in a similar
manner to the apparatus of like character described in the Specification
of a Patent granted to me, dated the 27th day of October 1862, No. 2890,

page_text: and in the Provisional Specification of an Invention filed in an applica-
tion for a Patent by myself and James Lee Norton, dated the 17th
January 1866, No. 163.
In arranging and constructing apparatus in accordance with my
present improvements the chamber of the steam trap is divided by a
corrugated flexible metallic disc or diaphragm, thus forming the chamber
into two compartments. The upper compartment is filled or partly
filled with water, the quantity being regulated by a stop-cock, to which
a vertical tube may be applied if desired for the water to rise up into
when it expands at a high temperature. The condensed water flows
from the steam pipe into the lower compartment of the chamber, in
which a double-seated compensating valve is arranged over the outlet
passage to the waste pipe for the condensed water to flow away through.
The double-scated valve is connected to the centre of the flexible disc,
and when steam is admitted from the steam pipe to the lower com-
partment of the chamber the expansion of the water in the compartment
above causes the disc and valve to descend and close the outlet valve,
and thus prevent the escape of steam. But when the condensed water
again fills the lower compartment the water in the upper compartment
is cooled and its volume contracts, allowing the flexible disc to resume
its former position, and thus open the outlet valve, through which the
condensed water is allowed to escape into the waste pipe. The outlet
valve is so arranged that the water flowing through it is divided into
opposing currents which counteract the force of the outflow, and thus
relieve the valve from pressure. The passage for the steam and
condensed water into the lower compartment is divided in order to
conduct the steam and water around the inner circumference of the
chamber, and thus prevent it from impinging upon the valve. The
amount of movement of the disc and valve. may be regulated from the
exterior of the apparatus by means of a screw, the stem of which passes
through a stuffing box in the cover of the upper compartment, and if
desired the outlet valve can be altogether closed by this means. The
outlet valve is protected from dirt or other matters by means of a
perforated screen.

page_text: discharging a large and continuous current of condensed water; it also
admits of the escape of foul air before the outlet valve comes into action
to prevent the escape of steam. The apparatus may be placed in exposed
situations without being liable to freeze.