Improvements in Feed Apparatuses applicable to Steam Boilerș and the like.
Year: 1894

page_text: Date of Application, 7th Aug., 1894
Complete Specification Left, 21st Mar., 1895-Accepted, 24th May, 1895
PROVISIONAL SPECIFICATION.
Improvements in Feed Apparatuses applicable to Steam Boilerș
and the like.
I FERDINAND MARIE SANDILLON, Chief Engineer at the Refinery of La Biette,
Aisne, in the Republic of France, do hereby declare the nature of this invention to
be as follows:-
.
This invention has for its object a system of automatic feed apparatus for steam
generator and other evaporating apparatuses, and consists in causing the rod of a
float to act directly or indirectly on small valve establishing communication
between a chamber and the boiler; this chamber, in two parts, is in continuous
connection with the supply pipe from the feed pump, or other source of fluid under
pressure, by means of a small orifice bored in a movable piston or a diaphragm on
which the pressure of the fluid supplied is continuously exerted. The said small
valve in opening empties the depression chamber more rapidly than it is supplied
by the feed fluid which enters therein through a small orifice, and it thus allows the
fluid under pressure to raise the piston or the diaphragm to which is attached
the feed valve of the boiler. This feed valve, the surface of which is smaller than
the surface of the piston or of the said diaphragm, is thus raised and opens a large
passage directly between the supply pipe and the feed pipe of the fluid into the
boiler. The opening and closing of this feed valve is thus produced automatically
according to the variations in the level of the liquid in the boiler.
Deted this 7th dow of August 1804
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.
Improvements in Feed Apparatuses applicable to Steam Boilers
and the like.
I FERDINAND MARIE SANDILLON, Chief Engineer at the Refinery of La Biette,
Aisne, in the Republic of France, 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 has for its object a system of automatic feed apparatus for steam
generator and other evapourating apparatuses, and consists in causing the rod of a
float to act directly or indirectly on a small valve, establishing communication
between a chamber and the boiler; this chamber is in continuous communication
with the supply pipe from the feed pump, or other source of liquid under pressure
through a small orifice, bored in a piston or movable diaphragm on which the
pressure of the feed liquid constantly acts. The float in sinking opens the small
valve which empties the chamber more rapidly than it is supplied by the feed
liquid entering through the small orifice and it thus permits the liquid under
pressure to raise the piston or diaphragm to which is attached the feed valve of
the boiler. This valve the surface of which is smaller than the surface of the
piston or diaphragm is thus, raised and opens a large passage direct between the

page_text: supply pipe and the feed pipe for thel iquid into the boiler. The opening and closing
of this feed valve are thus produced automatically according to the variations in
the level of the liquid in the boiler.
In the accompanying sheet of illustrative drawings:
Fig. 1 shows in elevation and partial vertical section an automatic feed apparatus
for steam boilers constructed according to this invention and in which the float
valve chamber and feed valve chamber are fixed at a certain distance one from the
other; and Fig. 2 shows in vertical section a similar apparatus with the float valve
chamber and feed valve chamber arranged to form one single casting.
Fig. 3 shows in vertical section a variation of the arrangement of the feed valve
which is flat and slides on its flat perforated seat; and
Fig. 4 shows in vertical section an automatic feed apparatus constructed
according to this invention in which the water allowed to escape by the float valve
when it is opened, flows into the feed pipe.
The automatic feed apparatus is operated by an ordinary float i fitted in the
boiler C and which follows the variations produced in the level z z of the liquid in
the boiler. The float thus moves the vertical rod m which carries at its summit
the float valve d (as shown in Figs. 1 and 2); or the float i displaces vertically the
rod m which acts through the lever h' (as shown by Fig. 4) on the float
valve d.
C the float i keeps the
from emptying. This
from the feed pump
When the level of the liquid z is normal in the boiler
valve d closed and prevents the float valve chamber
chamber q is in constant communication with the supply pipe
through the orifices o and o¹ bored in the novable piston or diaphragm a and
through the pipe t.
The section of the orifice o is smaller than that of the valve d. The piston a is
formed of two superposed parts in order to facilitate the taking apart of the
segments a' and the cleaning of the various portions: between these two parts is an
annular chamber a² which communicates on one side with the supply pipe a by a
series of orifices o' which to some extent strain the feed liquid and on the other side
with the top of the piston a and the float valve chamber g by the small orifice o
larger than the orifices o¹. The combination of these orifices o' and o has for its
object to insure the constant circulation of the liquid through the piston a even in
the case of one or more of the orifices o¹ being stopped up by impurity or dirt
carried by the feed liquid.
The feed valve bis provided with a rod b¹ which is fixed to the movable piston a
in a cylindrical chamber. The valve 6 closes at ordinary times the communication
between the supply pipé a and the feed pipe y which connects to the stop valve R
(Fig. 1) of the boiler or with the tube R¹ (Figs. 2 and 4) as when the float valve d
is closed an equal pressure is established at the top and at the bottom of the piston a
As
by means of the orifice o corresponding to the pressure in the supply pipe x.
the surface of the valve b is smaller than that of the piston a as soon as the float
valve chamber is emptied the pressure of the supply exerts itself with greater
intensity on the piston a than on the valve b and the latter is raised by the piston a
until the passage is completely opened for the liquid from the tube a to the tube y
and the boiler C. As soon as the normal level z z is again attained in the boйer.
the float i presses the valve d on its seat and thus closes the doat valve chamber g.
The feed liquid which continuously passes through the orifice o forces the piston a
back to its initial position and the valve b on to its seat. The spiral spring g
placed behind the piston a helps to insure the closing of the valve 6 by forcing it
firmly on its seat f
When the valve 6 is flat as shown by Fig. 3 it is bored with holes which in the
open position of the valve uncover more or less completely the holes f¹ bored in the
disc forming the base of the feed pipe y.
The flanges s designed to connect the feed valve box with the feed pump and with
the feed tube y can be parallel (Figs. 1 and 3) or perpendicular (Figs. 2 and 4) one
to the other

page_text: ย
The cover c of the valve box b may be provided with a crosshead c¹ (Fig. 1)
supporting at its centre a wheel the boss of which acts as a nut to the screwed
rod e passing through a stuffing box el fitted on the cover c. The lower part of the
rod e is provided with a cavity e' which can be made to cover the point 6 of the
piston rod a in such manner that on lowering the rod e by the operation of
the wheel the upward movement of the piston a under the pressure of the supply
may be stopped and the valve thus withdrawn from the action of the float i in
case of repairs or stoppage of the boiler C. This arrangement enables the valve b
(Fig. 1) to be used as a stop valve.
In order that the pressure of the boiler C cannot pass into the valve box 6 in the
event of repairing or cleaning any of the parts of the valve a one or two way cock
is arranged on the tube t (Fig. 1). So that the feed apparatus may be certain in
action even in the case when it is used for feeding water more or less incrustant to
steam boilers the float is suspended at the extremity of a lever pivoted at 1 and
the rod m of the valve d is attached at m' very close to the axis of oscillation 1.
The pivots of the lever are supported by lugs 12 cast with a collar j fixed by a
bolt on a shoulder of the lower part of the base p of the apparatus. This base p
is cast with openings p¹ outside the boiler C; it is provided centrally with an
The float and its lever / are
impervious lining through which passes the rod m.
held partly in equilibrium by the counterweight w so that a small alteration in level
taking place at the surface of the water in the boiler effects the opening of the
valve d which on its part effects the opening of the valve b. A stop 13 in connection
with the lever keeps this lever almost horizontal when the boiler C is emptied for
cleaning or repairing.
In the modification of the feed apparatus shown by Fig. 4 the rod m of the float
is made smaller at m³ and is provided with an inclined shoulder m which by resting
against the collar k prevents the escape of the steam coming from the boiler C
when the stuffing glands k¹ k surrounding the rod m³ are repaired. At the summit
of this rod m³ is fixed by means of the screw v¹ a saddle v which rests on one of the
extremities of a lever h₁ oscillating about the pivots 13 arranged at the summit of
the column screwed into a part 2 of the cover c. In this cover is hollowed out
a chamber q which is closed at its lower part by a valve d the rod d¹ of which
passes through a stuffing gland kk. At the top of this rod d' is fixed by the
screw a saddle which rests on the extremity of the lever opposite to that
where the rod m³ of the float rests. The valve d in rising when the float falls in the
boiler establishes communication between the chamber placed behind the piston a
and the chamber gl hollowed out in the cover c which is connected with the feed
pipe y through the channel t'. The liquid flowing back in the tube x which has
passed through the piston a through the orifices o' and o and which escapes
through the valve when this is open flows through the passage t¹ into the feed
pipe y and thence through the pipe R' behind the stop clack placed at the entrance
to the boiler C. In this arrangement of feed apparatus the float can be removed
into a compartment attached to and communicating with the boiler; the feed
liquid does not then enter directly through the tube into this compartment.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
1 claim is:
1. A system of feed apparatus applicable to steam boilers and all other
evaporating apparatuses, characterised by the combination :-of a feed valve
interposed between the supply liquid pipe and the feed pipe leading to the
evaporating apparatus, connected to a piston or movable diaphragm receiving
the pressure of the supply liquid; of a piston or movable diaphragm, receiving the
pressure, the surface of which is larger than that of the said valve, the said
receiver being bored with a small hole making communication between the supply
liquid pipe and a chamber closed by a small valve; with a small valve connected
to a float placed in or in communication with the evaporating apparatus; the

page_text: whole arranged in such manner that when the level of the liquid falls in the
evaporating apparatus the small valve connected to the float opens the float valve
chamber the liquid in which flows into the evaporating apparatus thus effecting a
depression in this chamber which effects the opening of the feed valve.
2. An automatic feed apparatus for steam boilers constructed with a valve b flat
or perforated connected to a piston or movable diaphragm a bored with an
opening o through which the supply liquid enters, and which accumulates in a
float valve chamber 9, adjoining or separated from the piston or diaphragm a; this
chamber 9 in connection with the boiler, being closed, when the level is normal in
the boiler, by a small valve d the section of which is larger than the orifice o
connected to the rod m of the float i substantially as described and shown.
3. The improvements in feed apparatuses applicable to steam boilers and the like
substantially as described with reference to the drawings.
Dated this 20th day of March 1895.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.