IMPROVEMENTS IN AUTOMATIC STEAM- Civil Engineer, for the Invention of BOILER FEEDING APPARATUS
Year: 1879

page_text: LETTERS PATENT to Herbert John Haddan, of the Firm of Herbert and
Company, Solicitors of Patents, of 67, Strand, in the City of Westminster,
"IMPROVEMENTS IN AUTOMATIC STEAM-
Civil Engineer, for the Invention of
BOILER FEEDING APPARATUS." A communication from abroad by Charles
Ault, of the City of Montreal, Dominion of Canada, Doctor of Medicine.
Sealed the 18th March 1879, and dated the 3rd January 1879.
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at the
Office of the Commissioners of Patents on the 3rd January 1879.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
* IMPROVE-
Patents, of 67, Strand, in the City of Westminster, Civil Engineer.
A communication
MENTS IN AUTOMATIC STEAM-BOILER FEPDING APPARATUS."
from abroad by Charles Ault, of the City of Montreal, Dominion of Canada, Doctor
of Medicine.
The improvements consist in the application of an intermediate feed vessel in
which the water can be antomatically kept at any desired level by means of a float
governing the position of a piston and a valve with which it is connected. The
latter has two faces which alternately closo upon their respective seats, thereby
establishing a communication either between the upper part of the feed vessel and
the atmosphere, or between the feed vessel and the steam space of the boiler, while
the water is supplied to the feed vessel through an injector. The piston contains
an internal steam chamber and a slide valve which is kept under the control of the
aforesaid float by lever connections, and covers or opens two small ports, one of
which communicates through a passage in the piston with the front of the latter,
viz., the space between the piston and the cylinder cover, while the second port
communicates through another passage with the atmosphere. If the wator in the
feed vessel is low, the slide valve admits steam to the front of the piston, setting the
latter in motion and pressing the attached valve on one of its seats so as to
After the
establish a communication between the feed vessel and the atmosphere.
injector has supplied sufficient water to the feed vessel, the slide valve sets the front
of the piston in communication with the atmosphere, the piston is released from
steam pressure, whereby the attached valve changes its seat and closes the feed

page_text: vessel against the atmosphere. The upper part of the feed vessel then communi-
cates with the steam space of the boiler, in consequence of which water goes from
the feed vessel through the feed pipe to the boiler, until the water level in the feed
vessel has become the saine as that in the boiler. Feed pipe as well as steam pipe
is provided with check valves, and all improvements may be constructed of metal.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Herbert John Haddan in the Great Seal Patent Office on the 2nd
July 1879.
HERBERT JOHN HADDAN, of the Firin of Herbert and Company, Solicitors of
Patents, of 67, Strand, in the City of Westminster, Civil Engineer. " IMPROVE-
MENTS IN AUTOMATIC STEAM-BOILER FEEDING APPARATUS." A communication
from abroad by Charles Ault, of the City of Montreal, Dominion of Canada, Doctor
of Medicine.
This Invention relates to improvements in boiler feeders for steam boilers, and
consists, first, of a double faced steam valve, having a steam way up through its
centre in connection with a stem provided with a steam chamber, having an
auxiliary steam valve and steam ports; secondly, of a case or standard for
enclosing the aforesaid valve and stems, and a syphon provided with a steam outlet
and water inlet, in connection with a water chamber, having a float which operates
n working shaft connected with the auxiliary steam valve. It further consists in
improvements in the construction of the boiler feeder, all of which will be herein-
after fully described and particularly pointed out in the claims. In the accom-
panying Drawings which show a practical form of the Invention, Figure 1 is a
vertical sectional view of an automatic steam boiler feeder embodying the improve-
ments. Figure 2 is a vertical sectional view of all except the water chamber.
Figure 3 is a view of the main steam valve and stem. Figure 4 is a view of the
auxiliary steam valve. Figure 5 is an elevation showing the connection between
the auxiliary steam valve and the rock shaft which is operated by the float in the
water chamber. Figure 6 shows the method of connecting the boiler feeder with an
upright boiler. Similar letters of reference indicate like parts of the Invention.
The double faced steam valve C has the steam way V up through its centre, and is
provided with a stom T in which is a steam chamber K, having an auxiliary valve
J, the stem T is also provided with steam ports L, L. The case or standard B
contains in addition to the stem T and valves C and J, the syphon D, and is
provided with the steam inlet G, steam outlets E and F, water inlet I. The steam
inle G leads from the boiler to the steam chamber H. The steam outlet E leads
rom the water chamber A to the double faced valve chamber C, and thence when
the valve C is open to the air through the exhaust F. The water inlet I leads from
the well or reservoir through check valve P to syphon D, thence to the water
chamber A. The float S is secured by a stem to the rocking shaft M by an

page_text: adjustable rod and cranks 0, O. The water chamber A has an inlet W from the
syphon D, and an outlet B to the water space in the boiler. The steam passage E
acts as both inlet and outlet for the steam to the water chamber A. A counter
balance N for the float S is connected to one end of the rock shaft M as shown.
Figure 6 shows the manner of connecting the boiler feeder with a commou upright
boiler. The same plan applies equally well when tho connection is made with any
other kind of a boiler. It will be observed that when the feeder is connected with
the pipes leading to the boiler, it shonld stand at such height with relation to the
surface of the proper water line in the boiler that the float S will float a little more
than clear of the bottom of the water chamber A. The operation of the Invention
is as follows-Starting with steam pressure in the boiler, as the water is converted
into steam, the water surface line in both the boiler and water chamber A of the
boiler feeder descends. The float S descends with the water in the chamber A.
A trifling descent of the float S starting at the level above described, causes it
through its connections 0, 0, to so work the auxiliary valve J, as to open steam
'communication from the steam charber H through the upper port in the valve
stem T to the steam chamber U. The area of the top of the valve stem T exposed
to pressure in the chamber U being greater than the area of the double faced valve
C at either seat, with steam admitted to the chamber U, the main valve C will
close down upon its lower seat and cut off communication between the steam
chamber H, and water chamber A, and at the same time will open communication
between the water chamber A and the exhaust E, and permit the steam contained
in the water chamber A to escape to the open air, thus relieving the water chamber
A from boiler pressure. At the instant that the steam exhausts as above described,
the check valve R in the outlet pipe X between the feeder and the boiler closes,
and as the steam pressure is out, the syphon D commences to operate to fill the
water chamber A from the well or reservoir, drawing its supply through the pipe I.
As the water chamber A fills up, the float S ascends with the water until when
nearly at the top, it has so`moved the auxiliary valve J, that it closes communication
between the steam chamber H and U, and opens communication between the upper
and lower ports L, L, in the valve stem T, thus permitting the steam to exhaust
from the chamber U to the open air by way of the principal exhaust F.
The
pressure is now removed from the top of the valve stemn T, and as pressure always
exists upon the lower end of the double faced valve C, when tho feeder C is in
operation, it will force the valve C up and close it upon its upper val ve seat, thus
opening communication between tho steam chamber H and the water chamber A,
and removing the boiler pressure in the water chainber A, and pormitting the water
contained in the chamber A to flow through the pipe X and check valve R into the
boiler, as it necessarily seeks its level. When the float has fallen to the lino first
described, the operation is repeated as frequently as the boiler needs water. The
variation of the height of the water in the boiler is but trifling. The auxiliary
valve J is arranged with relation to its connections and ports L, L, so that when it
has opened the upper port L sufficiently to admit steam enough to drive the main
valve C down, the said valve in its descent will open the port still further,
permitting free passage of the steam. The same result is obtained with relation to
the exhaust from the steam chamber U in the upward movement of the main valve
C. Having thus described my Invention, what I claim as new and useful, and
desire to secure by Letters Patent is :-First. In a boiler feeder, the double faced
valve C provided with steam passage V and stem T, having ports L, L, in combina-
tion with the auxiliary valve J, connecting rod O, O, and rock shaft M, constructed
and operating substantially as and for the purpose set forth. Second. In a boiler
feeder. The steam valve and syphon case B provided with the steain chamber H
and U, steam and water inlets and outlets F, G, E, and I, constructed and operating
substantially as and for the purpose set forth. 3. The combination with the water
chamber A provided with the float S, inlet W, and outlet R, X, of the rock shaft M,
counter balance 2, connecting rod o, o, the stem T, valves J, C, and case B, having

page_text: steam and water inlets and outlets, constructed and operating substantially as and
for the purposes set forth. Fourth. In a boiler feeder, the syphon Daud water pipe [,
having check valve P in combination with the water chamber A, having float S.
Case B having steam and water inlets and outlets E, F, G, I, valves C, J, steam
chamber H, U, and cranks and rods o, o, constructed and operating substantially as
and for the purpose set forth.
In witness whereof, I, the said Herbert John Haddar, have hereunto set my
hand and seal, this First day of July, A.D. 1879.
H. J. HADDAN. (L.S.)