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Патент USA US2133934

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7 Oct. is, 1938.
e. ERICSSON ET AL ~
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2,133,934
. CLOSURE FOR PRESSURE VESSELS
Filed July 18
193
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Oct. 18, 1938. '
I
ERlcssoN ET AL
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CLOSURE FOR- PRESSURE VESSELS- 7
Filed July 18, 1956
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3 Sheets-Sheet 2
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Oct. ‘18, 1938.
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e. ERICSSON ET AL
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CLOSURE FOR PRESSURE VESSELS
‘Filed July 18, ‘1936
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s Sheets-Sheét' a
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£7624.
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2,133,934
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~ 2,133,934 A
Patented Oct. 18, 1938 I
UNITED STATES "PATENT OFFICE
r
2,133,934
CLOSURE FOR PRESSURE VESSELS
Gunnar Ericsson, Philadelphia, and John L. Cox,
Spring?eld Township, Montgomery County, Pa.,
assignors to The Midvale Company, Philadel- -
phia, Pa., a corporation of Delaware
ApplicationgJu‘ly 18, 1936, Serial No. 91,356
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4 Claims.
(01. 220-3)
In the art of synthesizing chemicalstimpreg
\ nating materials with gases, and in other analo
. ’
gous arts, it, in many instances, is necessary to
- perform the operation under superatmospheric
'5 pressure, such pressures varying from pressures
slightly above atmospheric to pressures of many
thousand pounds to the square inch. Such oper
ations are necessarily conducted within a closed
chamber which must be sealed against escape of
.10 contained materials. Since in many cases the
'
the inward extension e being comparatively thick
and in?exible and spaced from the body to form
a pocket 1‘ the purpose and function of which is
hereinafter described. The lower face of the ele
ment c has a smooth plane surface adapted to
contact with-the smooth plane surface of the
shoulder b.
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Formed in one face of the shoulder b or in one
faceof the element e‘ (preferably in the face of
‘shoulder b) is an annulargroove g, preferably of _10
triangular cross-section for rubber gaskets, in
chamber must be opemzd?tg receive the. ma
terial or materials to b
eated, synthesized, which isinserted adeformable gasket h, for ex
amalgamated or impregnated and to remove the '
?nished product or replenish the catalyst, it
15 must be provided with a removable closure, which
must make an effective seal. It is also highly de
sirable that the closure should be capable of quick
removal and replacement, since chambers of the}
ample, of soft metal or rubber, which, when ele
ment e is forced against shoulder b, will be de- _
formed to assume approximately the shape of, 15.
and ?ll, the groove, thereby affording a resistance
to the escape of the contents of the cylinder be
tween element 6 and shoulder b. As the internal
pressure rises, there ‘is required an increasing‘
kind speci?ed are very expensive, and it is im
20 portant, from the standpoint of economical oper-,. pressure against the gasket by the contacting sur-; 20
ation, that they should not be out of operation for
a substantial length of time between successive
operations.
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The object of the invention is to provide a
25 chamber meeting the requirements above speci
?ed.
.
.
A preferred embodiment of the invention is
v
faces to prevent the escape of thecontents of the
cylinder, and our» invention is designed auto- ‘
matically to produce that increasing pressure. '
Bolted to the inner face of the element e is the
?ange of a ring 2', the body of which -is con- 25
?ned between the element e ‘and the member d‘
and limits the extent to which the head 0 may be
shown in the drawings, wherein Fig. 1 is a longi-\ inserted within the cylinder. Pocket ,f has free
tudinal sectional view of the chamber with its ?uid
indercommunication
through one or with
a number
the interior
of holesof7' the
extend3
cyl- ' my
30 removable closure in closed position; Fig. 2 is a '
view, in the same sectional plane as, Fig. 1, of lag between, the inner and outer faces of the ring‘,
part of the structure of Fig. 1 on an enlarged so that the pocket I is under the same pressure
the interior of the cylinder. This ring is a
scale; Fig. 3 15a plan view of Fig. ‘'1 after the as
desirable,
but in some cases an unnecessary, pro
head is lowered toward closing position but before ‘
35
vision.
;
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35 being turned on its axis to effect ?nal closure;
It is desirable that the head 0 should carry the
and Fig. 4 is a longitudinal sectional view ‘of a
member (I so that the member d may be positioned
modi?ed removable closure.
and
withdrawn by the mere insertion and removal
The main body of the chamber is a cylinder a
' which at its open end is of enlarged diameter, the ofthe head 0.. This may be'e?ected by securing
enlargement being abrupt to form an annular to the central thickened part of member 11 a bolt ‘.40
M
shoulder b having a smooth face extending in a k which extends up through the center of the '
plane at right angles to the axis of the cylinder.
The closure is eifected byv means of a removable
head 0 which, when in closed position, extends
4;, within'the enlarged end of the cylinder. Posi
' tioned between the head 0 and the shoulder b is a
head 0, the free upstanding shank of the -'bolt
~~~
being slightly longer than the thickness of the
head.
1
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'
The internal wall of the enlarged end of the 45
cylinder and the peripheral wall of the head are
provided with complementary interrupted screw
member d, the main body of which is of disc-like - threads. In positioning the head preparatory to
shape and which comprises a comparatively thick
v central portion tapering‘in thickness toward its
50 periphery and throughout most of its area so com
moving it'down into closing position, the threaded
arcuate portiohs of the head are aligned with the 50
paratively thin as to be capable of ?exing under ‘ blank arcuate portions of the enlarged end of
the cylinder, and the head may then be lowered
pressure. The member d is provided with a cir
cumferential ?ange which extends downward and
thence inward, the downward extension being
55 of about the same thickness as the thin body and
'
into position by a straight movement along the
axis of the cylinder. The head ‘is lowered until
the member d contacts with shoulder b. In this 56
L
2
2,133,334
movement oiie or more pins m, seated in, and pro
iecting above the face of, the shoulder b, extend
into aligning holes in the element e and prevent
the latter having any turning movement relative
to the cylinder. After the head c-and themem
ber d carried thereby are thus preliminarily posi
tioned, the head c is given a fractional rotation
.
the inward extension being comparatively thick‘
and in?exible andv engaging the shoulder, said
?ange forming a pocket communicating with the
interior of the cylinder and tending to maintain
a ?uid-tight seal between the inward extension
of said ?ange and the internal shoulder on the
cylinder, means to hold saidv member, when in?
movement causing the threads thereon to engage ~ position, from turning circumferentially within
the threads on the internal wall of the cylinder, the cylinder, the inner wall of the cylinder above
10 thereby moving the head downward and causing
it to contact member at and press ring 1‘ against
element e, which thus con?nes the gasket in
groove g against the shoulder b.
The pressure of ?uids tending to leak beyond
15 the gasket h is counterbalanced by the ?uid pres
» sure within pocket f, thereby insuring against
any escape of ?uids from within the cylinder.
It is 'clear that the application of the closure
' 'to the cylinder may be e?ected with the utmost
20 expedition. Its removal, also, may be quickly ac
complished. After the removal of the head, the
’ gasket h, which is of inconsiderable value, if im
paired, may be removed and replaced'by a fresh
gasket preparatory to the next operation. .
25
‘so
If the interior of the cylinder is to be sup
plied, after the cylinder is. closed, with pressure
?uids, these may be introduced through the ori
?ceo in the bottom of the cylinder or in any
other known and convenient way. By making the
bolt is integral with the member d and‘ by in
creasing its diameter to a considerable size, to
form a shank k’, such as is illustrated in Fig. 4,
access for ?uids to the interior of the cylinder
can be had through this shank (in addition to,
or in place of, access through the lower. head),
the shoulder and the exterior of the closure head 10
being provided with cooperative interrupted
screw threads, and means supporting said mem
ber from said head butallowing the head to have
a helical movement incident to its closure with
out turning said member within the, cylinder 15
while at the same time pressing said member be
tween said head and shoulder.
2. A chamber adapted to be subjected to super
atmospheric pressure and which may be quickly
opened and closed and which when closed will 20
be secure against leakage, the same comprising '
a cylindrical body the internal wall of which ad
jacent one open end is shaped to provide an
internal annular shoulder, an end closure com
prising a head engageable with the end of the 25
cylinder above the shoulder, a member con?n-,
able between said head and said shou1der,.said
member comprising a comparatively thin disc
like body portion of metal capable of ?exing and
provided with a peripheral ?ange extending 30
downward and inward, the inward extension be
ing comparatively thick and in?exible and en
gaging the shoulder,‘ and compressible sealing
means con?nable between the inward extension
of said member and said shoulder, said member
‘which is frequently, if not generally, desirable. having a pocket in its periphery in free com 35
In Fig. 4 means providing such access is shown munication with the interior of the cylinder to
as furnished by'eitheror both of the channels provide a pressure operative to hold said inward
3 and t.
extension tightly against said shoulder and to
40 vIt is obvious that means other than those cooperate with said sealing means to prevent 40
shown for retaining head 0 in position against leakage between said inward extension and said
internal pressure will, operate satisfactorily even shoulder to the exterior wall of the cylinder.
if not so rapidly. For example, the head‘ can
3. A chamber in accordance with claim 2
be supplied with a ?ange p enabling it to be wherein the member con?nable between the re
45 bolted in place by stud bolts 1' planted in the movable head and said shoulder has a compara
upper face of cylinder at, as illustrated in Fig. 4, tively thick central portion extending through
in which the head is lettered c'. Other ways the head.
1
of retaining the head in position may be adopted,
4. A chamber adapted to be subjected to super
our invention not being limited to any particu
atmospheric pressure and which may be quickly
lar construction to eifectuate the positioning of opened and closed and which when closed will
50 .the end closure.
be secure against leakage, the same comprising 50
The spacing ring 1', when employed, need not a cylindrical body the internal wall of which ‘ad
be continuous throughout its circumference, al
jacent one open end is shaped to provide an in
though a continuous ring a?ords the most read
ternal annular shoulder, an end closure compris
ily applied spacing expedient. A-series of spaced
ing a head engageable with the end of the cyl
55
apart blocks 2",as shown in Fig. 4, constitutes inder above the .shoulder and a member con?n 55
an obvious equivalent for a unitary ring.
>
What we claim and desire to protect by Letters
Patent is:
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1. A chamber adapted'to be subjected to an
peratmospheric pressure and which may be
quickly-opened and closed and which when closed
will be secure against leakage, the same compris
ing a cylindrical body the internal wall of which
65
adjacent one open end is shaped to, provide an
internal annular shoulder, an end closure com
prising a head‘ engageable with the end of the
cylinder above the shoulder and a member of
the diameter of the head con?nable between said
head and shoulder, said member comprising a
comparatively thin disc-like body portion of
metal capable of ?exing and. provided with 13. pe
ripheral ?ange extending downward and inward,
able between said head and shoulder, said mem- ,
ber comprising a comparatively thin disc-like
body portion of metal capable of ?exing and pro
vided with a peripheral ?ange extending down
ward and inward, the inward extension being 60
comparatively thick and ‘in?exible and engag
ing the shoulder, said ?ange forming a pocket
communicating with the interior of the cylinder
and tending to maintain a ?uid-tight seal be
tween the inward extension of said ?ange and 65
the internal shoulderon the cylinder, said mem
ber beingprovided with a central hub of consid
erable diameter extending through the head, said
hub having a channel providing access for ?uid:
to the interior of the chamber.
»
GUNNAR ERICSSON.
JOHN L. COX.
70,
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