IMPROVE- MENTS IN APPARATUS FOR SUPPLYING STEAM BOILERS WITH WATER
Year: 1863

page_text: PROVISIONAL SPECIFICATION left by James Platt at the Office of the
Commissioners of Patents, with his Petition, on the 7th August 1863.
I, JAMES PLATT, of No. 10, Charlotte Street, Bloomsbury, in the County
of Middlesex, do hereby declare the nature of the Invention for "IMPROVE-
MENTS IN APPARATUS FOR SUPPLYING STEAM BOILERS WITH WATER," to be as
follows:-
This Invention has for its object improvements in apparatus for supplying
steam boilers with water. For these purposes a closed reservoir or cistern
suitable to contain a quantity of water is placed over or in any other proper
position above the steam boiler which is to be supplied with water. The
cistern or reservoir is placed within another close cistern or reservoir of larger
dimensions, into which the water is first received from the source of supply,
and from which outer cistern or reservoir the water passes into the inner
cistern or reservoir when the pressure in said inner cistern or reservoir is such
as to admit of its doing so; there is a valve between the two vessels which
opens inwardly from the outer cistern or reservoir into the inner one. The
inner cistern or reservoir is connected with the steam boiler by a pipe which
dips into the water therein, and there is between this cistern and the boiler a
valve which opens inwardly towards the steam boiler when the pressure in the
inner cistern or reservoir and that in the boiler are alike. A steam pipe
connects the upper part of the steam boiler and the upper part of the inner
cistern or reservoir, by which when a valve is open steam will flow from tho
boiler into the upper part of the inner cistern or reservoir. This valve is

page_text: opened by a float in the boiler when the water level in the boiler sinks. Or
in place of having the upper part of the boiler and the upper part of the inner
cistern or reservoir connected by a steam pipe, a closed water vessel may be
interposed between the boiler and the inner cistern or reservoir; this water
vessel is connected by a water pipe with the boiler so that the water in the
boiler and in the water vessel will stand at the same level, and the upper part
of the boiler and the upper part of the water vessel also are connected by a
steam pipe so that the pressure in the two is equal. In this water vessel there
is a float which acts on a valve in a pipe which connects the upper part of the
water vessel and the upper part of the inner cistern or reservoir so as to allow
steam to pass when the float sinks below a certain level. In the inner cistern
or reservoir is a float which acts on a valve in a steam escape pipe at the
upper part of the inner cistern or reservoir. By these arrangements when
the water level in the steam boiler falls, steam will enter into the inner cistern
or reservoir, and equalize the pressure therein with that in the boiler, aud
then the water in the inner cistern or reservoir will pass into the boiler through
the dip pipe till the rise of the float in the boiler or in the water vessel stops
the steam from entering into the inner cistern or reservoir. The steam which
is then enclosed in the inner cistern or reservoir will shortly become condensed
by reason of such cistern or reservoir being surrounded with the water in the
outer cistern or reservoir, and this having taken place the water will flow
from the outer into the inner cistern or reservoir, whilst the water from
the source of supply will flow into the outer cistern or reservoir, and these
actions will take place as often as water is required to be supplied into the
boiler.