A NEW OR IMPROVED APPARATUS FOR FEEDING BOILERS OR OTHER VESSELS CONTAINING LIQUIDS UNDER PRESSURE SO AS TO MAINTAIN A CONSTANT LEVEL OF LIQUID THEREIN
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by William Henry Beck at the Office of
the Commissioners of Patents on the 18th October 1883. Communicated
to him from abroad by Ernest Joseph Varlet of Paris, in the republic of
France.
WILLIAM HENRY BECK of 115 Cannon Street in the City of London, Consulting
Engineer and Patent Agent "A NEW OR IMPROVED APPARATUS FOR FEEDING
BOILERS OR OTHER VESSELS CONTAINING LIQUIDS UNDER PRESSURE SO AS TO
MAINTAIN A CONSTANT LEVEL OF LIQUID THEREIN" [communicated to him from
abroad by Ernest Joseph Varlet of Paris, in the republic of France]
The novel feeding apparatus forming the subject of the present invention has for
object the maintaining of a constant level in steam boilers or other vessels
containing liquids under pressure. It consists essentially of a hollow valve or
tap having a rectilinear alternating movement or a continuous or alternating
rotary movement, for taking from a water reservoir without pressure, a volume of
water which it afterwards conveys into and leaves in the boiler or other vessel
it is required to feed.
According to one arrangement of the apparatus a reservoir into which the feed
water is first delivered is applied to the front of a chamber containing a vertical
hollow slide valve the rod of which passes through a stuffing box in the said
chamber. This latter communicates with the boiler or other vessel by two
branches the upper one of which corresponds to the level the water or other liquid
is intended to stand at, and the lower one enters the boiler or other vessel at some
lower point.
The slide in its alternate and intermittent vertical sliding movements presents
its internal capacity or hollow space alternately to an orifice or port between the
water reservoir and the chamber and to a chanuel in the said chamber which puts
the said hollow space in the slide valve in communication therewith.
When this slide valve occupies its lower position the hollow space in it is filled
with water and when it rises into its upper position this hollow space communicates
with the chamber and the water therein soon communicates its temperature and
pressure to the water brought in by the hollow space in the slide valve. If then
LD...
77

page_text: the level in the boiler or other vessel is lowered the volume of water in the slide
runs out and is replaced by steam from the upper part of the chamber. When the
slide valve returns into its lower position the hollow space therein delivers the
water or steam with which it is filled into the reservoir and then makes another
upward stroke with a fresh volume of water and so on.
The quantity of water brought by the slide each time should be a little in excess
of the maximum quantity required by the boiler during one complete evolution of
the slide.
The water reservoir communicates with a supply tank by a suction pipe and is
itself fed automatically by the action of the feeder as each volume taken from the
reservoir by the slide valve draws an equivalent volume from the supply tank
through the suction pipe.
According to another arrangement the slide valve is arranged to move
horizontally and on an inclined face and is double acting taking the feed water
alternately from one of two passages and transferring it to the chamber which is
in communication with the boiler.
The slide valve is moved by a connecting rod, a crank, and a pulley, the latter
of which is caused to rotate continuously by any suitable motive power.
The hollow slide valve may be made circular like a tap or cock and be caused to
rotate continuously or alternately
Other arrangements of slide valves may be employed to effect the same object
namely the continuous feeding and consequent maintenance of an invariable level
of the water in the steam boiler or other analogous receiver.