An Improved Regulator for Controlling the Admission of Air to Boiler Furnaces.
Year: 1891

page_text: Date of Application, 10th Sept., 1891-Accepted, 10th Oct., 1891
An Improved Regulator for Controlling the Admission of Air to
Boiler Furnaces.
WILLIAN TAYLOR 83 Waterway Street Nottingham Engine Driver and JAMES
HARLOW 8 Annarth Terrace, Kinglake Street Nottingham Wood Machinist 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 :-
Our improved regulator can be applied to Lancashire, Cornish & similar boilers
in which air is admitted behind the bridge for consuming the smoke, either through
the bridge, or through a plate at the end of the ash pit.
In order that our apparatus may be understood we have attached hereto one sheet
of drawings, showing in Fig. 1 a front elevation of our regulator and in Fig. 2 a
diagram of one method of applying the same.
Attached to the boiler front or other convenient place is a cylinder a containing
an ordinary piston which is attached by a rod 6 and link c to a lever d on a shaft e
which extends across the flue and under the furnace door f. The piston rod b is
suitably guided by a crosshead y & slides h, while the shaft e is carried in
bearings i.
Near the bottom of the cylinder a there is an inlet pipe j and an outlet pipe & the
latter being carried to any convenient gulley or waste receptacle. There is also a
pipe from the top of the cylinder a which runs into the waste pipe k or may be
continued separately.
The inlet pipe is in communication with a cylinder or other receptacle m which
is connected to the boiler below the water line by the continuation of the pipe n, or
the pipe j may be connected direct to any convenient liquid supply having a suitable
pressure.
The pipe is provided with a regulating valve o and a stop valve P, the pipe k
being also fitted with a similar stop valve g.
The valves p and q are connected by rods p₁ and 9', and links p² and q³ to a
lever which is so held by the spring that when the regulator is in action the
valve p is open and the valve g closed.
"
The end of the lever r is so shaped and arranged that when the door fis
opened it acts upon the lever and raises the end r³, which then closes the valve p
and opens the valve q.
The shaft e is also fitted with a lever el carrying a weight e³, and with a lever e³
which is connected by a rod e Fig. 2 to a door below the fire bars e*.
The action of the apparatus is as follows:-The cylinder m by its connection n
is kept full of water at about the same pressure as the steam in the boiler, and this
water forces its way gradually through the valves o and p to the cylinder a and
thereby raises the piston, and this through its rod and link turns the shafte and
closes the door. When more fuel is required the door is opened and through
the lever closes the connection with the cylinder m and opens the valve
+
g which
allows the water under the piston to escape by the pipe k, the piston at the same
time being pulled down by the weight which acts through the shaft e and thus
opens the door e*.
It will thus be seen that when the fire has been mended and it is giving off the
greatest amount of smoke, that air is being admitted behind or through the bridge
in the greatest quantity, and that as the fire burns through and the smoke given off
decreases, the air admitted correspondingly decreased, its rate of decrease being
regulated by the valve o which controls the water admitted to the cylinder a,

page_text: It will be understood that the parts may be actuated at either side of the door f
or from the bottom of the same.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed we declare that what we
claim is :-
1. The combination of a cylinder and piston; with an inlet valve p and outlet
valve o connected substantially as shown and described.
2. The combination of the cylinder a with valves p and q and the arrangement
for actuating the latter from the door f.
3. The combination of a cylinder a valves pand 9, and the apparatus for working
the latter, with a valve o for regulating the admission of the motive force to the
cylinder a.
4. The general arrangement of the apparatus substantially as shown and describedy
as and for the purposes specified..
Dated thin at 1001