Year: 1892

page_text: Date of Application, 30th Aug., 1892-Accepted, 15th Oct., 1892
In the drawings-
Fig. 1 is a perspective view of parts of a furnace and boiler showing my
improvement attached ;
Fig. 2 is an enlarged front elevation, partially in section, of the time movement,
the compensating pulleys, the pivoted dog and other connecting parts of the
mechanism;
Fig. 3 is a face view, partially in section, of the two compensating pulleys,
showing the position of the devices at the moment of commencing to open the
furnace door;
Fig. 4 is a plan view of said two compensating pulleys, with the parts in the same
position as shown in Fig. 2;
Fig. 5 is an enlarged vertical section of the steam chamber by which the steam
is discharged into the furnace, also the connecting parts of the same;
Fig. 6 is a cross section in line of Fig. 5, and a plan view of the two pulleys
by which motion is imparted to the valve inside the steam chamber;
Fig. 7 is a face view of the damper inside the passage through the bridge wall in
the ash-pit;
Fig. 8 is a front elevation of the furnace showing a modification;
A indicates the furnace front, provided with the ordinary doors B B¹ opening
into the fire chamber, and other doors opening into the ash-pit. My improvement
is connected with the doors B B', and is as follows:
C is a steam pipe leading from the boiler to a small steam chamber D, and
E E are two smaller branch steam pipes leading from the chamber D through the
furnace-front and opening into the fire chamber. When the door B is opened the
steam is automatically turned on through the branch pipes E E and injected over
the fire, as will be presently described.
F (Fig. 2), is a time movement of any suitable kind, provided with a winding
drum a and an escapement b. A cord having a weight & attached thereto winds
on one part of this drum, and another cord f connected with the pulleys hereinafter
described, winds on another part of the drum.
G and H are two pulleys turning independently on the same stud 9. The cord f
is attached to and winds up with the turning of the outer pulley H. Another cord
or chain, is attached to and winds up with the turning of the second pulley G.
The opposite end of cord is attached to a wheel i, on a valve-stem k, (Fig. 5),
which extends пр into the steam chamber D. On the upper end of the valve stem
is a disk valve k¹ and beneath this a fixed diaphragm of the chamber. The valve
and diaphragm are both provided with steam openings m m, which, when the
furnace door B is opened, coincide and turn the steam into the branch pipes E E;
but when the door is closed, are nearly shut off, allowing only a little of the steam
Di

page_text: to escape into the fire.
The door B is provided with a spindle n, which turns with
it, and on the upper end of the spindle is fixed a wheel o, similar to the wheel i, on
the valve stem. The wheel o has a pin p, which projects up and rests in a slot g,
of the wheel i, said slot being of such length as to allow the wheel o to be turned
back in the closing of door B, without imparting back motion to the wheel i, the
object of which will be presently described.
Another cord is attached to the inner pulley G, and to this cord is attached
a heavy weight s. To the lower end of the weights is attached a cord t, passing
around suitable pulleys uu, and finally attached to a supplementary hinged door v,
opening into the fire chamber. Another cord w is attached to weights, thence
extending around suitable pulleys to the shaft y, of a damper K, which is
located in a draft passage a, in the bridge wall L, beneath the firc.
On the inner or back side of the outer pulley H. is a rim 2, in which are made
two notches or stops c² (Figs. 2 and 3). To the outer face of the inner pulley G,
next to this rim, is pivoted a dog, having a catch f³, which engages with the
stop c². At the top of the pulleys is pivoted a detent g, attached to some
stationary part, which detent engages with the stop d².
M is a dog pivoted at 2 to some stationary part, the inner end engaging with a
stop on the rim of the inner pulley G, and the outer end resting under the time
movement.
The
The operation is as follows:-To replenish the fuel the furnace door B is opened.
This gives motion to the spindle n, and the latter to the valve stem k, through the
medium of the two wheels io. The turning of the stem K opens the valve kand
lets on steam, which then passes through the branch pipes E E, and is injected into
the fire above the grate. The turning of the valve stein k also winds up the cord r
on the wheel i and raises the weight s. This action draws on the cord t and raises
the supplementary door, and admits air to the fire chamber. At the moment of
commencing to open the door B, the dog attached to the inner pulley G, is in
engagement with the notch e² of the exterior pulley H, as shown in Fig. 3.
turning of pulley G, by the opening of the said door, also turns pulley H by
reason of said engagement of the dog with the stop. This draws on cord and
winds up the time movement. The winding of the drum a draws up the weight, d.
When the dog * reaches the top of the pulleys its inclined end strikes a stop k²
which trips the same, and throws the dog out of engagement with the outer
pulley H, thereby releasing the time movement and allowing it to run. This
position of the. parts is shown in Fig. 2, where the time movement has just com-
menced to run.
The weight d serves as the power to run the time mechanisin. At
the same moment the end of the dog M has caught the stop on the rim of the
inner pulley G, and holds the same, thereby retaining the weight s elevated, and
holding the supplementary door open. But the main door B can be closed
immediately, since the slot in the wheel allows the pin p in wheel o to turn
backward freely. The opening of the door B therefore turns on the steam and
clevates the supplementary door, and its closing is made without turning off the
steam or closing the supplementary door.
When once in motion the time movement continues to run until its weight d
strikes the outer end of the dog M, when it depresses the same, releases the
opposite end of the dog from the stop thereby freeing the pulley G, allowing the
weight s to drop, which turns off the steam, except a small jet as before described,
and also allows the supplementary door to drop and shut off the passage of air.
The interval of time during which the steam and air have passage, depends upon
the length of time the time movement runs, and this can be arranged as desired.
The stop d² is to prevent the weight d from running down when the time move-
ment is stopped. The same action which turns on the steam and admits the air,
also opens the damper K in the bridge wall below the grate, and allows escape of
draft from under the fire. When steam is injected it blows downward on the
fire, depositing smoke and soot thereon, and the draft beneath the grate tends
to draw it down and complete the combustion. When the steam is cut off the

page_text: damper K is also closed. By the means above described the smoke and soot
can be effectively consumed.
In Fig. 8, the supplementary door e is dispensed with, and the action of turning
on and shutting off the steam is produced by the opening and closing of the
furnace door alone. In such case but one wheel is required, the same being
attached to the spindle n, and the latter extends directly up into the steam
chamber D, and carries the valve k at its upper end.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1st. The combination, with a furnace door, of time mechanism having an escape-
ment, a steam pipe opening into the furnace, a connection between the door and
pipe, and a connection between the door andt ime mechanism, by which, respectively,
the steam is turned on and the time mechanism wound in opening the door, said
mechanism having suitable connections for turning off the steam at the end of a
given time; substantially as specified.
ง
2nd. The combination, with time mechanism having an escapement, of a main
furnace door, a supplementary door or valve, connections, between the main door
and the supplementary, door or valve, and between the main door and time
mechanism, whereby, respectively, the supplementary door will be opened and the
time mechanism wound by the opening of the furnace door; substantially as
specified.
3rd. The combination, with time mechanism having an escapement, of a main
furnace door, a supplementary door or valve, connections between the main door
and the supplementary door or valve, and between the main door and the time
mechanism, whereby, respectively, the supplementary door will be opened and the
time mechanism wound by the opening of the furnace door, and connections
between the time movement and the supplementary door, whereby the latter will
be closed at the end of a given time, substantially as specified.
4th. The combination, with time mechanism having an escapement, of a main
furnace door, a supplementary door or valve, connection between the main door
and the supplementary door or valve, and between the main door and the time
mechanism, whereby, respectively, the supplementary door will be opened and the
time mechanism wound by the opening of the furnace door, a steam pipe and valve,
and connections whereby the valve will also be opened by the furnace door, and
connections whereby it will be closed at a predetermined time by the time
mechanism, substantially as specified.
5th. The combination, with a furnace door, of an inductive steam pipe, an
eductive steam pipe, a steam chamber divided by a diaphragm provided with ports
into two compartments, with which said pipes connect respectively, a valve attached
to the spindle within said chamber, and adapted to cover and uncover the ports in
the diaphragm, whereby the opening of the door turns on the steam and its closing
turns the steam off; substantially as specified.
6th. The combination of a furnace door, a spindle attached to the same and
turning with it, a pulley on the spindle, a cord attached to the pulley, and a time
mechanism normally held at rest with which the cord is connected, whereby the
opening of the door will wind said mechanism, and a dog adapted to be released
by the opening of the door to permit the time mechanism to act; substantially as
specified.
7th. The combination, of a furnace door, a spindle attached to the same and
turning with it, a winding wheel on the spindle, a pair of pulleys mounted inde-
pendently on the same support and connected by an engaging dog, a cord attached
to the spindle passing over one of the pulleys and provided with a counterweight, a
cord winding on the other pulley and connecting with a drum of the time move-
ment, a dog for holding the first named pulley, and a weight attached to the time
movement for operating the dog; as specified.

page_text: 8th. The combination, of the two pulleys G H, the dog f connecting the
pulleys, the dog M engaging with the pulley G, the time movement provided
with the weight d resting over the .outer end of dog M, the stop for dis-
engaging the dog, and the winding cord f, as shown and described; and for the
purpose specified.
72
9th. The combination, of the door B, the spindle turning therewith, the
steam chamber D, the valve stem k provided with the valve A, the diaphragm,
and the wheels i, o, attached respectively to the spindle and valve stem, one
being provided with the slot g and the other with the pin p; as and for the purpose
specified.
10th. The combination, with a furnace door, of a steam pipe for injecting steam
into the furnace, a connection between the door and the steam pipe whereby the
steam will be turned on by opening the door, a damper in the draft opening in the
bridge wall below the fire, and a connection extending from the door to the damper
whereby the damper will be opened by the opening of the door; as specified.
11th. The combination, of a time mechanism having an escapement, with a steam
pipe adapted to admit steam to the combustion chamber of the furnace, and having
a cock or valve, and with intermediate devices whereby the steam can be auto-
matically cut off at a predetermined time; substantially as set forth.
Dated this 30th day of August 1892.
.
HERBERT J. ALLISON,
Agent for the Applicant.