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Патент USA US2112410

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March 29, 1938.
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F. R. RICHARD
2,112,410
AUTOMATIC SAFETY FIRING VALVE
GOVERN
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By?étmggiigw
A llomeys‘
March 29, 1938.
2,112,410
F. R. RICHARD
AUTOMATIC SAFETY FIRING VALVE
5 Sheets-Sheet 2
Filed Jan. 8, 1956
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Inventor
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March 29,1933.
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FRRICHARD-
2,112,410
AUTOMATIC SAFETY FIRING VALVE
Filed Jan. 8, 1936
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Patented Mar. 29, 1938
2,112,410‘
PATENT ()FFICE‘
~ UNITED STATES
_
2,112,410
. AUTOMATIGSAFETY FIRING VALVE
Francis R. Richard, Marshall, T'ex.
Application January 8, 1936, Serial No. 58,214
2 Claims.
(Cl. 236——26)
This invention relates to safety valves and
more particularly the invention resides in the ’
provision of an automatic safety ?ring valve
designed to supplement the present arrangement
5 for ?ring boilers with oil, gas or any combustible
material that may be conducted by piping.
An object of the present invention is to pro
vide means for controlling the boiler pressure
bye-controlling the ?re and thus avoid any un
necessary release ofsteam through the usual
safety
valve. *
-
‘Still a further object of the invention is to
provide a self contained unitary apparatus, which
may be used without interfering with present
.manually operated ?ring arrangement for boilers.
Figure 3 is a side elevational view of the ap
paratus with certain parts shown in section and
Figures 4 and 5 are detail sectional views taken
substantially on the lines 4—4 and 5--5 respec
tively of Figure 2.
.
'
Referring to the drawings by reference nu
merals it will be seen that the apparatus com
prises a valve casing I which embodies a pair 10
of integral cylinders including a cylinder 2 of
relatively small diameter and a cylinder 3 of
relatively larger diameter.
Further the inven
tion comprehends the provision of a piston
mounted for reciprocation within the casing I 15
Still another object ofthe inventlon'is to pro
and including a pair of integral sections con
vide a safety device 'that will act as an auxiliary
sisting of a piston 4 operating within cylinder
2 and a larger piston 5 operating within cylinder
to the safety valve on boilers, the safety valve
functioning only when the device fails to func
tion.
.
'
Still a further'objeot of the invention is to
provide a self contained apparatus that will re
duce the intensity of the ?re at a pressure slight
ly less than the adjustment of the usual safety
25 valve, but which apparatus may be cut out at
any time desired to permit the safety valve to
function in the normal manner.
A further object of the invention is to pro
vide means for maintaining a predetermined
30 . boiler pressure without danger of the usual safety
valve functioning with a consequent loss‘ of steam.
Among the objects of the invention also is the
provision of means for shutting off the ?re with
out disturbing the adjustment of the manually
35 operated valve, as may be‘ desired, when for
3. Each of the pistons as shown are provided
with suitable packing rings and are also pro 20
vided with reduced portions 6 and 1 respectively.
For the casing I there is threaded into the
casing at one end of the cylinder 3 a cap 5 into
which is tapped one end of a T 9.
For the relatively opposite end of the casing 25
I there is threaded into the end of the cylinder
2 a plug I 0 equipped with a gland structure I I
for accommodating an adjustment rod I2 which
has a portion threaded in the bore of the plug
It as at I3. By axially adjustingthe rod I2 30
the stroke of the pistons 4 and 5 is regulated
at will.
At one side thereof the cylinder 2 has tapped
into the wall thereof one end of a pipe I4 which
leads, in the present instance, from the mani
example, blowing out the burner, or in the case‘
of an emergency when fire is beyond control.
Further, among the objects of the invention is
fold of a conventional high pressure atomizer
controlled by the ?reman in the usual manner.
Also tapped into the same side of the cylinder
the saving of fuel by a saving of steam that
might otherwise escape through the usual safety
valve, and by relieving the ?reman so that he
2 is a pipe I5 of smaller diameter and this pipe
I5 leads from the steam manifold of the low
can givev closer attention to maintaining an cili
cient and safe water level in the boiler.
Numbered‘ among the objects of the invention
45 is also the provision of a device embodying a
construction, combination and arrangement here
inafter more fully referred to, that may be in
stalled with a minimum of alteration to present
equipment.
50
Figure 2 is a view mostly in horizontal cross
section through the apparatus.
Still further, it is an object of the invention
to provide a device of the character above men
tioned which is sufficiently simple in operation
as to require no specialized or highly skilled labor
to operate the same, other‘ than now employed
pressure atomizer.
Steam entering the cylinder 2 from the pipes
I4 and I5 pass‘ from the cylinder when the
piston valve 4 is in open position through ports
16 provided in the wall of the cylinder 2 as
clearly shown in Figures 2 and 4, and is con
ducted through the medium of a pipe I1 to the
burner atomizer of the boiler.
Oil from a manually operable ?ring valve (not
shown) enters the cylinder 3 through a port
I 3, being conducted from the manually operat
ing ?ring valve through the medium of a suit~
able pipe l9.
With the piston valve 5 at the open position,
which is the position shown in Figure 2 the oil
The invention together with its objects and thus entering the cylinder 3 passes about or
advantages will be best understood from a study around the reduced portion 1 of the piston and
of the following description taken in connection , exhaust from the cylinder 3 through an exhaust
in ?ring with present equipment.
with the accompanying drawings wherein:
Figure 1 is a-top‘plan view of the apparatus.
port I9 to be carried off through‘the medium
of a pipe 20 to the oil section of the burner 60
2
2,112,410
where the supply of oil to the burner is con
trolled by the ?reman in the usual manner.
For venting the casing l and to prevent the ac
cumulation of steam within the casing I between
the adjacent ends of the pistons 4 and 5, said
casing l is provided with a suitable vent port 2|.
For releasing pressure in chamber 22 provided
larly intended for usein connection with boilers
?red with oil, and particularly locomotive boilers,
a relatively simple arrangement may be pro
at the outer end of the cylinder 3 the T-?tting 9
claimed as new is:
is provided with a vent port 23.
i
The invention is also used in connection with a
conventional diaphragm pressure regulating gov
ernor 24 which is connected as at 25 with the ?t
ting 9 and is also connected at 26‘with the boiler
(not shown).
Also the T 9 at the end thereof opposite to the
15
vided for ?ring boilers with gas or other com
bustiblematerial that may be conducted by pip
mg.
Having thus described the invention, what is
-
1. A device of the character described com
prising a two-diameter casing presenting a pair 10
of alined cylinders one of which is of relatively
small diameter and the other of which is rela
tively large diameter, one of said cylinders being
provided at one side thereof with a pair of steam
inlet ports, and at an opposite side thereof with
diaphragm pressure regulating governor 24 has
circumferentially spaced outlet ports, and the
connected therewith a ball check valve assembly
2‘! of any suitable known construction.
largest cylinder being provided at one‘ side there
of with an oil inlet port, and at the opposite side
The operationof the invention may be brie?y
described as follows:
Steam under pressure’ is conducted through
the medium of the pipes l4 and I5 into the cyl
inder 2 from the high and low pressure atomizers
respectively. As a result pistons 4 and 5 move
as a unit to the position shown in Figure 2 un
covering ports l6 permitting the steam from the
pipes l4 and 15 to pass through the cylinder 2
and the pipe I’! to the burner atomizer. Also
with pistons 4 and 5 in this position oil from the
usual ?ring valve passes into the cylinder 3
about the reduced portion 1 of the piston 5 and
from the cylinder 3 passes through the pipe 20
to the oil section of'the burner.
When steam in the boiler reaches a predeter
mined pressure the diaphragm pressure regulat
ing governor 24 acts in response thereto to per
mit the steam from the boiler to pass through
the T 9 into the chamber 22. As the pressure in
chamber 22 builds up pistons 4 and 5 in response
40 to this pressure move to the left in Figure 2 thus
moving the reduced portion 1 of the piston 5 out
of alinement with the ports l8 and I9 resulting
in a cutting off of the ?ow of oil through the
cylinder 3 and pipe 29 to the burner.
As the pressure in the boiler falls diaphragm
45
pressure regulating governor 24 acts to cut off
communication between the apparatus of the
invention and the boiler and accumulated pres
Q11
7
thereof with an oil outlet port, a pair of inte
gral pistons mounted for reciprocation within
said casing and including a smaller piston oper
ating within. the ?rst named cylinder, and a
larger piston operating in the second named cyl
inder, each of said pistons having a reduced in
termediate portion, the reduced intermediate
portion of the smallest piston adapted to aline
with one of said steam intake ports, and said
steam outlet ports when said pistons are at the
terminus of one stroke thereof, and the smallest
diameter of the largest piston adapted to aline 30
with the oil inlet and outletports of the second
cylinder when said pistons are at the terminus
of their return strokes, a cap closing one end of
said casing and the second named cylinder, a T
?tting tapped into said cap, and a diaphragm
pressure regulating governor and a check valve
respectively connected by said T ?tting in aline
ment one with the other.
2. A device of the character described com
prising a two-diameter casing presenting a pair 40
of alined cylinders one of which is'of relatively
small diameter and the other of which is rela
tively large diameter, one of said cylinders be
ing provided at one side thereof with a pair of
steam inlet ports, and at an opposite side there 45,
of with circumferentially spaced outlet ports,
and the largest cylinder being provided at one
side thereof with an oil inlet port, and. at the
opposite side thereof with an oil outlet port, a
sure in the chamber 22 escapes to the atmosphere
through vent port 23 so that the pressure of
steam in chamber 28 will now act against the
pair of integral pistons mounted for reciproca
piston 4 to move the piston to the position shown
in Figure 2 to permit a resumption of ?ow of
piston operating within the ?rst named cylinder,
and a larger piston operating in the second
tion within said casing and including a smaller
named cylinder, each of said pistons having a
oil to the burner.
When it is desired to cut out the automatic» reduced intermediate portion, the reduced inter
mediate portion of the smallest piston adapted
feature of the invention and allow the conven
tional safety valve to function, communication to aline'with one of said steam intake ports, and
said steam outlet ports when said pistons are at
from the boiler to the diaphragm regulating gov
‘ernor 24 is cut off by a valve (not shown) placed the terminus of one stroke thereof, and the
smallest diameter of the largest piston‘ adapted
in the line 26 within easy reach of the ?reman.
This will permit the apparatus to remain in open
position.
When it is desired to blow out the burner with
out disturbing the adjustment of the manually
operated ?ring valve and atomizer, a valve (not
shown) arranged in a pipe (not shown) con
necting the steam manifold of the burner with
the check valve 21', is opened, allowing steam to
raise the fall check valve and pass into cham
70 ber 22 for moving the pistons 5 and 4 to closed
position. Under such condition steam is con
veyed to the oil section of the burner by suitable
branch conduit means (not shown).
75
It is to be understood that, while the inven
tion as herein shown and illustrated is particu
to aline with the oil inlet and outlet port of ' the
second cylinder when said pistons are at the ter
minus of their return strokes, a cap closing one
end of said casing and the second named cyl
inder, a T ?tting tapped into said cap, a dia 65
phragm pressure regulating governor and a
check valve respectively connected by said T ?t
ting in alinement one with the other, a‘ plug
threaded into said casing at the end thereof re
mote from said cap, said plug being provided
with a gland structure, and an adjusting spindle
threadedly connected with said plug and axially
adjustable relative to said plug for controlling
the stroke of said piston.
‘
.
FRANCIS R. RICHARD.
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