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Патент USA US2131094

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Sept. 27, 1938.
K. CLARK
2,131,094
SAFETY DEVICE
Filed July 12, 1957
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Patented Sept. 27, 1938
' 2,131,094
NlTED STATES PATENT OFFlCE
2,131,094
SAFETY DEVICE
Kendall Clark, South Bend, Ind., assignor to In
ternational Engineering Corporation, Chicago,
111., a corporation of Illinois
Application July 12, 1937, Serial No. 153,217
11 Claims.‘ (or. 137-161)
This invention relates to safety devices such as
automatic shut-off valves for the fuel line of an
oil burner or the like. An object is to provide a
is axially slidable a valve plunger 30 urged
against the valve seat 24 by a coil spring 32 sur
rounding the pin 28 and compressed between the
simple but reliable and effective device for shut
5 ting oil’ a feed line automatically when subject
base of the plunger and a washer 34 mounted
on the pin 28. The pin 28 is formed with a 5
. :ed to excessive heat.
?ange 36, seated against the plug 26 when the
In one desirable arrangement, the device in
cludes a valve plunger or the equivalent which is valve ‘is fully open, against which the washer 34
holds the perforated end of a latch 38. The
held in open position by a bimetallic latch, the '
10 latch being de?ected byexcessive heat to release opening in the end of the latch 38' encircles the
pin 28 just below the ?ange 36.
10
the plunger, which is thereupon automatically
The latch 38 is bent at right angles to par
seated by a suitable spring.
allel the pin 28, and its lower end is bent at 40
Various features of novelty relate to the con
to hook under an annular ?ange formed on the
struction and operation of the parts, to the as
15 sembly of the working parts for removal as a plunger 30 and facing toward the valve seat 24.
unit, to the provision of means facilitating re = The latch 38 is of bimetallic material. Normally 15
latching the valve in open position again when it holds the plunger 30 off the seat 24, but under‘
the in?uence of excessive heat it automatically
cool, and to other novel combinations and desir
able arrangements which will be apparent from de?ects to release the valve plunger 30, where
upon the spring 32 forces the plunger against the
20 the following description of the illustrative heat
'
20
ing system shown in the accompanying drawing, seat 24 to shut off the ?ow of fuel.
As so far described, the‘ two valves may be, and
in which:
'areshown as being of the same'construction, ex
Figure '1 is an elevational view showing some
what diagrammatically the heating plant and ‘ cept that the plug I26 of the valve I8 is in the
form ‘of a closed cap having a socket into which
the upper end 46 of the guide pin 28 is perma 25
nently threaded or otherwise secured.
The plug 26.0f the valve I8 is formed with a‘ '
25 the fuel tank and the fuel line between them with
one of my novel safety valve devices at each
end thereof.
'
Figure 2 is a section through
fuel-tank end of the line; and
30
the valve’ at the
threaded opening receiving a correspondingly
threaded portion 50 of its guide pin128, beyond
Figure 3 is a section through the valve at thev
burner end of the line.
which is an extension~52 passing through a pack
ing 54 held by a gland nut 56 and then- bent lat
The heating system illustrated in'Figure 1 com- .
prises a tank ID for fuel oil, a fuel line l2 leading
therefrom, and a heating plant including a suit
35 able furnace IG having an oil burner l6 receiv
ing the fuel from the-line l2. The particular
burner l6 illustrated is fully described in my
prior application No. 117,459 ?led December 14,
1936; however, any desired form of burner may
40 be used.
45
The burner l6 illustrated includes a
erally to form a handle 58.
30
l
‘
'In' operation, after the valve 20 has automati
cally shut off because of excessive heat, when it
'
5
has cooled off it is necessary to remove the unit
comprising the plug I26, the pin 28, the plunger
30, and the latch 38, whereupon the plunger 38
can be- pushed back up the pin 28 to re-set the
latch, and the unit re-inserted in the valve
pump for drawing fuel through‘ the line l2. from
body 22.
the tank In.
I
,
4°
Interposed in the line l2 adjacent the tank I8
The valve l8, however, can be re-set by turning
the handle 58 to shift the pin 28'carrying- the
is a novel automatic shut-off valve l8 shown in
latch 38v downwardly until the latch re-engages,
detail in Figure 2; Interposed in line I2‘adjacent
and then turning the handle 58 in the opposite
direction until the ?ange'36 engages the plug 26. as5
In addition to the above featur_es,'the valve can
be used as a manual shut-off valve by turning
handle '58 to force needle 38 tightly ‘against seat
the burner I 6 is a somewhat similar automatic
shut-off valve 20 shown in detail‘ in Figure 3. It
is mainly with these valves that the present in
vention has to do.
'
.
50 ' The valve l8 includes a valve body 22,=hav
ing at one side a valve seat 24,>and having at its
opposite side an opening alined with the valve
seat and into which is detachably threaded a
removable plug 26.
.
The plug 26 carries a guide pin 28, on which
. 24 through‘ the action of screw 58.
- While two embodiments have been described 5;0
in detail, it is not my intention to limit the scope
of the invention to those particular embodiments,
or otherwise than by the terms of the appended '
claims.
‘ 55
2
2,131,094
I claim:
with an opening, a plug removably seated in said
-
1. A safety device comprising a valve body
formed with a seat, a spring-pressed valve mem
ber urged toward said seat to close the valve, 9.
bi-metallic latch holding said valve member un
seated and adapted to be distorted by excessive
heat in a direction to unlatch said valve member
to allow it to seat itself, and a plug threaded into
the valve body and having a part projecting to
10 ward said seat and which has slidable guiding
engagement with the valve member, said latch
being secured at one end adjacent the junction
between the plug and said part.
‘
2. A safety device comprising a valve body
opening,'a guide pin carried by said plug and
alined with said seat, a valve plunger movably
mounted on said pin and movable against said
seat, a spring urging the plunger toward said
seat, said plunger having a locking shoulder fac
ing toward said seat, and a bi-metallic latch ?xed
at the end adjacent said plug and having at its
other end a hook normally engaging said shoul
der and which is adapted to be de?ected by exces
sive heat to unlatch said plunger, said pin being
operable from outside the valve to shift said
. latch to cause it to re-engage said shoulder when
cool.
15 formed with a seat, a valve plunger having a
'7. A valve comprising a valve body formed on
one side with a'valve seat and on its opposite side
with an opening, a plug removably seated in said
with a latch shoulder, a bi-metallic latch ?xed
at one end and having its other end bent and
20 hooked under said shoulder. to hold said valve
member unseated and which is adapted to be
distorted by excessive heat in a direction to un
latch said valve plunger to allow it to be seated
opening, a guide pin carried by said plug and
alined with said seat, a valve plunger .movably
mounted on said pin and movable against said 20
seat, a spring urging the plunger toward said
seat, said plunger having a locking shoulder fac
ing toward said seat, and a bi-metallic latch ?xed
at the end adjacent said plug and having at its
other end a hook normally engaging said shoul
der and which is adapted to be de?ected by ex
cessive heat to unlatch said plunger, said latch
being mounted at its ?xed end on said pin and
spring by which it ‘is urged toward said seat
to close the valve, said plunger being formed
by said spring‘, means operable from outside the
valve body for relatching the valve-plunger, and
a plug threaded into the valve body and carry
ing the valve plunger and the spring and the
latch and said means.
‘
a
3. A valve comprising a valve body formed on the pin having a part projecting through the
plug and operable to shift the latch to cause it 30
30 one side with a valve vseat ‘and on its opposite
side with an opening, a plug removably seated in to reengage said shoulder when cool.
said opening, a guide pin carried by said plug and '
8. A valve comprising a valve body formed on
alined with said seat, a, valve plunger movably one side with a valve seat and on its opposite
mounted on said pin and movable against said side with an opening, a plug removably seated
35 seat, a spring urging the plunger toward said seat, in said opening, a guide- pin carried by said plug 35
said plunger having a locking shoulder facing and alined with said seat, a valve plunger mov
toward said seat, and a bi-metallic latch ?xed at ably mounted on said pin and movable against
one end to the plug and having at its other end said seat, a spring urging the plunger toward
a hook normally engaging said shoulder and said seat, said plunger having a locking shoulder
which is adapted to be de?ected by excessive facing toward said seat, and a bi-metallic latch 40
heat to unlatch said plunger.
‘
?xed at the end adjacentgsaid plug and having
into said opening, a guidepin carried by said
plug and alined with said seat, a valve plunger
movably mounted on said pin and movable
against said seat, a‘ coil spring encircling said
pin and con?ned between the base of the plunger
at its other end a hook normally engaging said
shoulder and which is adapted to be de?ected
by excessive heat to unlatch said plunger, said
latch being mounted at its ?xed end on said pin 45
and the pin having a part projecting through
and threaded in the body of the plug and rotat
able to move said pin lengthwise toward the valve
seat to shift the latch to cause it to reengage said
and a shoulder associated with said pin and urg
shoulder when cool.
ing the plunger toward said seat, said plunger
9. A valve comprising a valve body formed on
one side with a valve seat and on its opposite side
with an opening, a plug removably seated in said
4. A valve comprising a valve body formed on
one side with a valve seat and on its opposite
side with a threaded opening, a plug threaded
having a locking shoulder facing toward said
seat, and a bi-metallic latch ?xed at one end
to said plug and having at its other end a hook
normally engaging said shoulder and which is
adapted to be de?ected by excessive heat to un
latch said plunger.
5. A safety device comprising a valve body
formed with a seat, a valve plunger having a
spring by which it is urged toward said seat to
close the valve, said plunger being formed with
a latch shoulder, a bi-metallic latch ?xed at one
end and having its other end bent and hooked
under said shoulder to hold'said valve member
unseated and which is adapted to be distorted
by excessive heat in a direction to unlatch said
.
opening, a guide pin carried by said plug and
alined with said seat, a valve plunger movably
mounted on said pin and movable against said
seat, a spring urging the plunger toward said
50
55
seat, saidplungerhaving a locking shoulder fac
ing toward said seat, and a bi-metallic. latch ?xed
at the end adjacent said plug and having at its 60
other end a hook normally engaging said shoul
der and which is adapted to be de?ected by ex
cessive heat to unlatch said plunger, said plug
and said pin and said plunger and said spring
and said latch all forming a unit removable by 65
detaching the plug from the valve body.
10. A valve comprising a valve body formed on
valve plunger to allow it to be seated by said
spring, said plunger having means operable from one side with a valve seat and on its opposite side
outside the valve for relatching the bi-metallic ‘ with an opening, a plug removably seated in said
opening, a guide pin carried by said plug and 70
70 latch to the plunger when cool, and a plug re
movably mounted in the valve body and carry- . alined with said seat, a valve plunger movably
ing the valve plunger and the spring and the mounted on said pin and movable against said
seat, a spring urging the plunger toward said
latch and said means.
6. A valve comprising a valve body formed on " seat, said plunger having a locking shoulder fac
76 one side with a valve seat and on its opposite side ing toward said seat, and a bi-metallic latch 75
2,131,094
?xed at the end adjacent said plug and having
at its other end a hook normally engaging said
shoulder and which is' adapted to be de?ected
by excessive heat to unlatch said plunger, said
latch being mounted at its ?xed end on said pin
and the pin having a part projecting through and
threaded in the body of the plug and rotatable
to move said pin lengthwise toward the valve
seat to shift the latch to cause it to reengage
3
urged toward said seat to close the valve, said
plunger being formed with a latch shoulder, and
a bimetallic latch ?xed at one end and having
its other end bent and hooked under said shoul
der to hold said valve member unseated and
which is adapted to be distorted by excessive heat
in a direction to unlatch said valve plunger to
allow it to be seated by said spring said plunger
having 'a handle operable from outside the valve
for relatching the bimetallic latch to the plunger 10
when cool, and said handle also being operable
to shift said plunger to manually open and close
the valve from outside the valve while said bi
said shoulder when cool, said plug and said pin
and said plunger and said spring and said latch
all forming a. unit removable by detaching the
plug from the valve body.
11. A safety device forming a manual shut-o? _ metallic latch is in latching position.
15 valve and comprising a valve body formed with
a seat, a plunger having a spring by which it is
KENDALL CLARK.
15
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