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Патент USA US2119750

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June 7, 1938..
0. MOELLER
STOKER MECHANISM
2,119,750
Filed Feb. 7, 1935
INVENTQR
Betta Noel/Len
ATTORNEY
'
2,119,150
Patented June 7, 1,938
UNITED STATES PATENT OFFICE '
2,119,150
STOKER MECHANISM
Otto Moeller, Brooklyn, N. Y., assignor, by mesne
assignments, to The Standard‘ Stoker Com
pany, Inc., (1922), New York, N. Y., a corpora
tion of Delaware
‘Application February 7, 1935, Serial No. 5,394
4 Claims. . (Cl. 110-177)
of, distributes fuel .evenly over all parts of the
This invention relates to locomotive stokers
of the type in which fuel is placed manually at
the ?ring opening of the ?rebox and within. the
?redoor, there to be automatically projected and
grate.
‘
The ?redoor 2| is provided with a frame 22
suitably mounted on the boiler backwall l3 partly .
embracing the ?redoor opening which is closed by 5
a pair of door members 23 and 24, pivoted upon
sure ?uid blast.
,
It is an object of ‘the invention to provide in a the pins 25 and 26 to swing outwardly. A motor
stoker of the type described novel, compact, em; ‘ 21 for operating the door members 23 and 24 is
cient and simple means for coordinating the ’ supported from the upper portion of the frame
movement of the ?redoorand the action of the ' 22 by the pins 25 and 26 through the depending 10
pressure ?uid blast, whereby the pressure fluid ?ange 28. The motor 21 is operated in a manner
5 distributed uniformly over the ?rebed by a pres
well known in the art, as describedin detail in
. blast will function automatically immediately
upon the opening of the ?redoor and whereby the I
the patent to Rosenfelt, No. 1,171,463, granted
February 15,, 1916, by pressure ?uid admitted
through the pipe 29, and controllediby a. suitable
valve 30. The valve 30 is responsive to movement
pressure ?uid blast will continue to function for
15 a predetermined period of time after the ?redoor
is closed.
Other objects and advantages of the invention
of the treadle 3| through suitable arms 32 and 33
will become apparent from the following descrip
controlling the supply of pressure ?uid to the pipe
tion when read in' connection with the accom
29 and motor 2'! from the supply line 34.
In stokers of the type described above‘, it has
panying drawing, in which,
Figure 1 is a central longitudinal section vbeen customary to provide an . arrangement
whereby a blast of steam will issue across a dis
through a portion of a locomotive with the in
vention shown in elevation and in place on the tributor plate from a distributor head when the‘
?redoor is opened and will‘ automatically be in
locomotive ;
NI U!-
terrupted as soon as the door closes.
Figure 2 is a rear elevation of the stoking mech
may best be recognized when the operation is de
scribed. The ?reman steps on the treadle, open
ing the ?redoor, and places a scoop of fuel on
the distributor plate, then. releases the treadle, .4
Figure 3 is a view similar to Figure 1 with por
tions of the mechanism embodying the invention
broken away and shown in section; and
Figure 4 is a vertical section through the novel
30
valve mechanism.
,
'
Such an
arrangement has several disadvantages which
anism embodying the invention;
p
thereby closing the door. The door is therefore
The invention may be applied to various types only open momentarily after the fuel is placed on
of furnaces, but it is particularly applicable to the distributor plate, and since the steam blast,
locomotive furnaces, more specially to furnaces'ofh issues only while the door is open, it is obvious '
locomotives of the switcher type, and for con ' that the steam blast will not be in operation a
venience in describing the invention it has been sufficient length of time to project all the fuel
so shown in the drawing and will be so described. from the distributor plate onto the ?rebed. As
In the drawing, the locomotive is indicated a result, the ?rebox does not receive a su?icient
generally by the numeral Ill and is provided with charge of fuel and repeated delivery of fuel upon
the distributor plate by the ?reman is necessary. 40
40 the usual ?rebox I l, the grates l2, the‘ boiler back
wall l3 and the conventional ?ring opening 14. As an alternative the ?reman after deliverying a
charge of fuel to the distributor plate, might keep
The locomotive cab is shown at l5 and is pro
vided with the deck I6 located a su?icient distance
below the lower marginal edge of the ?ring open
his foot on the treadle until all the fuel is pro
jected from the distributor plate, but this would
ing l4 to permit convenient manual ?ring.
necessitate permitting the ?redoor to remain -
The stoking mechanism is represented gen
erally by the numeral l1 and comprises-a dis
tributor plate 18 detachably mounted and ex
open, which is an obvious disadvantage.
tending forwardly through the ?ring opening I4
into'the ?rebox II. A nozzle [9 is positioned at
the fuel delivered on the distributor plate to‘ be
projected over the ?rebed by a pressure ?uid 50
‘
These disadvantages are eliminated by means
of the herein described device whlchpermits all ,
the rear of the distributor plate 18 and is ar ’ blast with but a momentary opening of the ?re
ranged to issue a blast of pressure ?uid over the
In the present arrangement, pressure ?uid is
surface thereof. The nozzle I9 in conjunction
admitted to the distributor head or. nozzle l9
‘ with the plate l8, which is provided with out
through pipes 35, any suitable number of which ,
55 wardly curving depressions 20 on each side there
door.
,
’
~
»
2
2,119,750
may be used. A pressure ?uid supply line com
prising pipes 36 and 36a has the novel valve mech
anism 31 interposedtherebetween for controlling
the supply of pressure ?uid and communicates
with the pipes 35 delivering pressure ?uid thereto.
The valve mechanism 31 includes a casing 38
having a pressure ?uid inlet port 39 communicat
ing with the pressure ?uid supply pipe 36 and a
pressure ?uid outlet port 40 communicating with
10 the pressure ?uid supply pipe 36a. A valve mem
ber 4| comprising a stem 42 carrying a. piston head
43 at one end'and a piston head 44 at.the other
end, is arranged to reciprocate in the casing 38.
The casing 38 is provided with a removable head
15 45 permitting access to the interior thereof and
any suitable means may be employed for secur
ing the head 45 rigidly with, the casing 38.
,
,In one extreme position of its movement, as
shown in Figure 4, the valve member 4| inter
20 rupts communication between ‘the ports 39 and
49, cutting off the supply of pressure ?uid to the
pipes 35 and nozzle l9; while in its opposite posi
tion, the valve member 4| permits communica
tion between the ports 39 and 40 allowing pres
25 sure ?uid to, pass from the pipe 36 to the pipe’
36a and thence to the pipes 35 and nozzle l9.
The end wall 46 of the casing 38 is provided
with a large port "41 which is ?ared to form a
seat 48 in the end wall 46. A valve member 49
30 having a .stem 50 arranged to slide in a bracket
5|, moves inwardly tolits seat 48 to close the
port 41 and away from its seat 48 to open the
port 41. The valve member 49 and stem 50 are
responsive to movement of the lever 52 which is
35 pivoted at 53. One end of the lever arm 54 con
tacts the stem 59 and one end of the lever arm
55 contacts the lug 56 depending from the lower
marginal edge of the door member 23.
A spring 51 mounted in the head 45 urges the
40 valve member 4| towards the end wall 46 of the
casing 38. The piston head 44 of the valve mem
ber 4| is provided with a. passage .56 which is.
raise the lever arm 54 about’ the pivot 53. The
lever arm 54 forces the stem 50 upwardly causing
the valve member 49 to engage the seat 48 there
by closing the port 41. ' Pressure ?uid from the
supply pipe 36 passes into the space between the
piston heads 43 and 44 and then through the
small passage 58 into the‘ space beneath the pis
ton head 44. The rate at which pressure ?uid
passes into the chamber beneath the piston head
44 may be regulated by a. needle valve 59 inter 10.
posed in the passage 58. Thus, after the doors
are closed, pressure ?uid is still emitted from the
nozzle I9 until the pressure in the ‘chamber be
neath the piston head 44 has been su?iciently
built up to raise the valve member 4| against 15
the pressure of the spring '51 until it rests against
the seat 6|, thereby closing the port 40 and cut
ting off the supply of pressure ?uid to the noz
zle I9.
‘
e
.
When the door 2| is again opened to permit 20
?ring of fuel into the ?ring opening, contact be
tween the lug 56 and lever arm 55 is again broken,
permitting unseating of the valve member 49
whereby pressure ?uid in the chamber beneath '
the piston head 44 exhausts to atmosphere 25'
through the large port 41 enabling‘ the spring 51
to force the valve member 4| ‘toward the end wall a.
46 until it rests on the seat‘ 60, thereby bringing
the ports __39 and 40 into communication.
In operation, if it ‘is found that the pressure 30
?uid blast from the nozzle l9 shuts o? too quickly
after the ?redoor is closed, it is only necessary
to restrict the passage 58 by regulating the needle
valve 59 whereby pressure ?uid enters the cham
ber beneath the piston head 44 more slowly, per 35
mitting the ports 39 and 40 to remain in com
munication for a longer period of time; and con
versely, if it is found that the pressure ?uid blast
continues too long after the firedoor is closed, it
is only necessary to open the needle valve 59 a 40
little wider, ‘permitting vpressure ?uid in the
chamber beneath the head 44 to build up more . '.
considerably smaller in diameter than the port rapidly, thereby-closing the port 49 sooner.
41 in the end wall 46. The size of the passage 56: 1 I It is apparent from the foregoing that I have
may be regulated by a needle valve 59 interposed “provided .a simple, convenient, ei?cient and com
45
in the passage 58.
' pact mechanism for synchronizing the movement
In operation, when the ?reman steps ‘on the ' of, the" ?redoor with the pressure ?uid blast and
treadle 3|, the valve. 30 is opened permitting
pressure ?uid to pass from the supply line 34
50 through the pipe 29 to operate the motor 21,
v
_ thereby opening the door members 23 and 24
and breaking the contact between the lug 56 and
the end of the lever arm 55. This permits pres
sure ?uid in the chamber beneath the piston
55 head 44, which holds the valve member 4| to the
seat 6| against the pressure of the compressed
spring 51, to unseat the valve 49 permitting the
pressure ?uid to exhaust to atmosphere through
the port 41. The pressure'of the compressed
60
spring 51_forces the valve member 4| towards
the end'wall 46 until it rests on the seat 60,
whereby the ports 39 and 40 are brought into
communication.
Pressure ?uid passes from the
supply pipe 36 into the supply pipe 36a, then to
65 the pipes 35 and into the distributor head or noz
zle |9 whence it projects the fuel delivered on
the plate l8 into the ?rebox ||.
As soon as the ?reman has delivered the fuel
on the plate |8_ he removes his foot from the
‘for rendering the latter adjustable.
.lclaimz
’
'
~
1.: In combination with a furnace having a 50
?ring ‘opening, a fuel supporting distributor plate
in said ?ring opening, a fuel distributor head pro
vided with jet openings directed across said plate
for projecting fuel therefrom over the ?re in
said furna'ce, a door for the ?ring opening, a sup 55
ply line for delivering ?uid under pressure to said
distributor head, a ?uid operated valve interposed
in said supply line controlling the ?ow of ?uid
to said distributor head, said valve comprising a
casing provided with a ?uid inlet port and a ?uid 60
outlet port, said ports communicating with said
supply line, a valve element comprising spaced
‘piston heads rigidly secured together mounted
for reciprocation inv said casing, adapted in one
position to'establish communication between said,
65
inlet and outlet ports and in another position to
close said outlet port, said casing being provided
at one end with an exhaust port, a valve for
opening and closing said exhaust port, means
70 treadle 3|, thereby causing the valve 30 to close, responsive to closing of said door for moving said
cutting oif the pressure ?uid supply, whereby , valve to a position closing said exhaust port and
the operation of the motor stops and the door responsive to opening of said door to permit
members 23 and 24 drop by gravity to their movement of said valve to a position opening said'
closed position. Closing of the door members exhaust port, means at one end of said valve ele
75 causes the lug 56 to lower the‘lever arm 55 and ment for moving it to a position establishing sub
7,0
3
2,119,750
stantially immediate communication between
and a ?uid outlet port, said ports communicating
said inlet and outlet ports when said exhaust port
with said supply line, a valve element comprising
' is opened in response to the opening of said door, . spaced piston heads rigidly secured together,
1‘ whereby ?uid under pressure passes through said
supply line to said distributor head, a passage in
mounted for reciprocation in said casing, means
at one end of said valve element formoving it to
said valve element discharging at the other end of _ a position establishing substantially immediate
said valve element adapted to permit ?uid under
communication between said inlet and outlet
pressure to pass therethrough to the said other
end of the valve element for moving the valve
10 element to a position closing said outlet port
when said exhaust port is closed in response to the
ports, whereby ?uid under pressure will pass
through said supply line to said distributor head,
closing of said door, thereby interrupting passage
of ?uid under pressure through said supply line
to said distributor head, the passage in said valve
a passage in said valve element discharging at 10
the other end of said valve element for passing a
portion of the ?uid under pressure delivered to
vsaid casing from said inlet port to the said other '
end of said valve element, thereby moving the
15 element being adapted to restrict the ?ow of ?uid ' valve element to a position closing said outlet
20
under pressure‘ therethrough whereby movement
of vsaid valve element to close said outlet port is
delayed an interval of time after closingmof sai
port and interrupting the passage of ?uid under‘
pressure through said supply line to said distribu
tor head, said casing having anlexhaust port
exhaust port.
for venting ?uid under pressure from the said
_
_
-
other end of said valve element, means respon 20
2. In combination with a furnace having a ?r)
ing opening, a fuel supporting distributor plate - sive to opening and closing of the door for open
in said ?ring opening, a fuel distributor head ing and closing of said exhaust port, and means _
provided with jet openings directed across said
plate for projecting fuel therefrom over the-?re
25 in said furnace, a door for the ?ring opening, a
supply line for delivering ?uid under pressure
to said distributor head, a ?uid operated valve
interposed in said supply line controlling the ?ow
of ?uid to said distributor head, said valve com
.30 prising a casing provided with a ?uid inlet port
and a ?uid outlet port, said ports communicating
with said supply line, a valve element comprising
in said passage restricting the ?ow of ?uid under
pressure to the said other end of said valve ele
ment whereby movement of said valve element to 25
close said outlet port is delayedan interval of
time after closing of said door.
'
4. In combination with a furnace having a ?r- '
ing opening, a fuel supporting distributor plate
in said ?ring opening, a fuel distributor head 30
provided with jet‘openings directed across said
plate for projecting fuel therefrom over the ?re
in said furnace, a door for the ?ring opening, a
mounted for reciprocation in said casing, means supply line for delivering ?uid under pressure
35 at one end of said valve element for moving it ' to said distributor head, a ?uidoperated valve
interposed in said supply line controlling the ?ow
to a position establishing substantially immedi
ate communication between said inlet and outlet of ?uid to said distributor head, said valve com
ports,'whereby ?uid under pressure will pass prising a casing provided with a ?uid inlet port
throughsaid supply line to said distributor head, and a ?uid outlet port, said ports' communicating
40 a passage discharging at the other end of said ’ with'said supply line, a valve element comprising
valve element for passing a portion of the ?uid spaced piston heads rigidly secured together
under pressure delivered to said casing from said mounted ‘for reciprocation in said casing, means
inlet port to the said other end of said valve at one end of said valve element for moving it
element, thereby moving the valve element to a to a position establishing substantially immedi
‘position closing said outlet port and interrupting ate communication between said inlet and outlet
the passage of ?uid under pressure through said ports, whereby ?uid under pressure will pass
supply line to said distributor head, said casing through said supply line to said distributor head,
having an exhaust port for venting ?uid under a passage discharging at the other end of said
valve element for passing a portion of the ?uid
7 pressure from the said other end of said valve ele
under pressure delivered to said casing from said
50 ment, means responsive to opening and closing
inlet port to-the said other end of said valve
- of the door for opening and closing of said ex
haust port, and means in said passage restricting element, thereby moving the valve element to a
‘the ?ow of ?uid under pressure‘ to the said other position closing said outlet port and interrupt
end of said valve element whereby movement of " ing the passage of ?uid under pressure through
said
valve element to close said outlet port is said supply line to said distributor head, said, cas—
65
delayed an interval of time after closing of said ing having an exhaust port for venting ?uid un
spaced piston heads rigidly secured together
45
door.
~
3. In combination with a furnace having a ?r
35
40
45
50
55
’ der pressure from the said other end of said valve
element, means responsive to opening and closing '
ing opening, a fuel supporting distributor plate
of the door for opening and closing of.said ex
in said ?ring opening, a fuel distributor head
provided with jet openings directed across ‘said
plate for projecting fuel therefrom over the ?re
haust port, said passage being formed to restrict 60'
in said furnace, a door for the ?ring opening, a
supply line for delivering ?uid under pressure to
said distributor head, a ?uid operated valve in
terposed in said supply line controlling the ?ow
of ?uid to said ‘distributor head, said valve com- ‘
prising a casing provided with a ?uid inlet port
the ?ow of ?uid under pressure to the said other
end of said valve element whereby movement of
said valve element to close said outlet portlis de
layed an- interval of time after closing of said
/door, and a needle valve in said passage for regu 65
lating the said interval of time. -
O'I'I'O MOELL‘EB.
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