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Патент USA US2403859

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July 9, 1946. >
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A. w.»’HATF|ELD
2,403,859
TESTING DEVICE
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Filed Aug. 26, 1944
2 sheets-sheet 2 -
2,403,859
’ÍUNÀITED .STATES PATENT QFFICE4 '
vPatented Julye, 1946
2,403,359l v
TESTING DEVICE.
kAnim wnatneld, chicago, 111., assigner to.
Crane Co., Chicago, Ill., a corporation,of.`_I1li_nois =
application Augustzs, 1944„seria1fNo. v551,387 `
3 Claims. (Cl. 13S-901)
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the like. but. in which a. simple plain end gener
ally suitable. for welding is used to make the con
nection with the pipe or.V tubing.
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Fig. 1 is a plan assemblyl view of a preferred
embodiment of my invention.
Fig. 2 is a side view of the exterior of the de
10 vice referred to in Fig. 1.
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of Fig. 2..
joint quickly., safely and conveniently without
invention.
’ ofy Fig.` 7.
out. the` requirementV of. any special skill'or. han
dling on the part of the. operator and without in
any way marring or interfering with the. original
welded end connection on the fitting as com
pleted. by the manufacturer.
The novel welding clamp constituting~ this. i'n
vention may be not only easily applied and re
moved but it may alsov be made, veryl cheaply to
include a wide variety of shapes- and sizes to
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'of saddle employed' in the modified form. referred
otherwise. remove a. welded cap,4 or closure, then 25.k
re-.formfand ref-new the welded end connection
from which4 the cap has beenv removedlto` con
devised whereby- such pressure retaining connec
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' Fig. 9 is a perspective view of a. novel form
it has previously been‘necessaryV either to saw or
tion as above referred to may now be made with,
,
Fig.`8 is a sectional view taken on the line 8_8v
. test pressure.. After the test, has been completed
e
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scribed in. connection with Fig... 6.v
weld a cup or a plug on such end of the fitting
or header to make it suitable for retaining4 thel .
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Fig.. '7 is a side view of the modified form de
hasL heretoforebeenthe accepted practice to
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Fig. Gis a plan view. of a modified. form of‘ the
fittingsa by theapplication of internal ñuid’pres
sure's..1 In, the latter. connection for example it
With the foregoing in mindr it Will be. come
moreclearly apparent that. a means has been
‘
, of Fig.. 2.
considerableexpense. when testing these typesv of Y
attention.
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Fig. 5 is a sectional View taken _on the line 5-51.
afpr’óblem‘ to be able to obtain a. pressure tight 1,5
aged frequently, thus requiring further special
Fig. 3 is ar sectional View taken on the line.
3.--3> of Fig. 2.
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Fig. 4 is a, sectional View taken on the line 4_4
be understood at the outset that it hasvv lon-g been
bythe manufacturer.> ThisY practice has neces'
sarily been. relatively expensive and has ledto
objectionable delays inthe course of lmanufac
ture of. the header or the. fitting. The fitting or
header during such handling has also been dam
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Other important objects and advantages will`
become more readily apparent upon proceeding
withrthe specification read in light of the» ac.
companying drawings in which
To. gain a true appreciation`v of the back
greundlof this inventive contribution, it should
stitutethe completed fitting ready for shipment
2>
assembly of the clamping device.
vided with welding ends’or ~with. similar plain end
connections and angularly arranged outlets, in
. which no flange, vbead or threaded end is em
ployed for the attachment of. a test closure or
,
strips of metal'suitably welded to formthe. ñnal
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invention. relates generally- to testing de
vices.. More. particularly, it ,pertains to a novel
testing clamp, foruse in téstingheaders, L’s T’s,
crosses,. and other -side Youtlet fittings usually pro
to in Fig. 6.
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Fig.Y 10 is. la, sectional View taken' on the" line.
Ill-_I0 of Fig. 7.
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Referring now to Fig. 1 in which merely for
purpose of illustration for the application of my
301 invention ay fragmentary portion of a Welded
header I is shown having the weld' 2 to which>
the side outlet i> having the curved extension
or elbow portion 4’ for such welded connection
`_as may be necessary to suit the purposes of the
final installation. The end of the curved por
tion 4i is provided with the bevel surface 5 for.
effecting the final weld. As will hereinafter be
come apparent, the type of weld employed is not
an essential element insofar as the application
40. of this invention is concerned.
It should~ be understood. that the shape of the
header or similar fitting is frequently quite ir'
regular and' therefore requires special considera
tion after completion of its. manufacture when
. it becomes necessary to test the. same as apres
sure containing vessel. .Thus as will hereinafter
become more readily apparent it is because of its
. great
iiexibility
and
relative
convenience of
manufacture that the clamp ofv rnyinventi‘onl
lends itself to being. applied quickly and easily
Át. the same time the device isy sufficiently sturdy 50 to
the' fitting, notwithstanding the irregularity
so,A that_».by. actual test it has been found to be
of form of the fitting.
able toresist. successfully internal pressure loads
The test clamp of my invention is shown> more
of ?a. relatively high order„as,'for»example as much
clearly in Fig. 2, consisting essentially of a fiat
as. 1250 lbs..i`nternal'` pressure Without signs’of
plate portion 6 having an enlarged end 1 as more
Y ’ “suit the. many types. of` headers and pipe fittings.’
failure.,
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' Anotheradvantage in this constructiony lies in
the fact. that a cheap. and easily accessible sheet
gasket‘may‘ be employed'fan'd conveniently re
newed when necessary, While `the novel clamp
itself may be made yeconomically from sheets or
clearlyshownin Fig. 3 of suñicientsizeand shape
' to'conveniently accommodiate the endVv portion 5r
of the elbow 4`. Interposed between the ends“ of‘
the fitting asV at 5 and the plate 1 a suitable
gasket 8 is used, thus serving asa sealing'means
2,403,859
4
between the plate ‘I and the connection 5 of the
fitting. It has been found preferable although
not absolutely necessary that the plate portion 6
.
more clearly shown in Figs. 6 and 10. The end
portion of the posts 20 are weldedor otherwise
connected to the flat plate 2l. The' latter plate
be stiffened by means of a longitudinally ex
tending rib 9 Which may be integral or welded
member may be made as 'similarly described in
connection with the plate 6 of such size and
thereto. Approximately midway of the length
shape as to best suit the fitting with which the
of the plate 6 a yoke II is attached preferably by _, ' 'clamp is to be associated in testing. However,
Welding or by any other suitable means to the , the detailed manner in which the U shaped yoke
plate 6. The yok_e II is as shown more clearly
>is applied to the ñtting varies in this modifica
in Fig. 1 of generally U coniiguration. At its 10 tion by the interposition of the saddle member 24
closed or rounded end portion I2 a threaded set
preferably having integral therewith the anvil
screw I3 is positioned for reasons hereinafter
portion 23, the saddle member being preferably
explained.
hollowed out as indicated to fit the curved con
For the purpose of adding greater strength
tour of tlie iitting under test. As shown in Fig. 9
and security to the installation of my Welding
the saddle member is of substantially circular
clamp it is preferable to provide for the plate 6
cross section insofar as the yoke 25 isV concerned
to be pivotally mounted with relation to the fit
and is provided with the set screw 26 threadedly
ting 3. This is accomplished by having the lower
engaged to bear against the crotch portionß'l ofA v
end portion of the plate 6 provided ras indicated
at I5 with an apertured rib through which the
the elbow or _other fittings under test, thus fix.
bolt I6 extends for making a suitable connection
with the split collar I'I encircling the neck por
tion of the fitting 3. 'I‘he opposite end of the
fitting being tested.
split collar is similarly held to the fitting 3 by
quick and convenient attachment of a closure to
a ñtting under test and is accomplished without
the necessity for the special shaping of the ends
of the iitting to be tested nor making'any perma
edly locating the anvil portion `23 relative to the
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From the foregoing it will be apparent that a
novel clamp has been provided vfor effecting the
means of the through bolt I8. Thus it becomes
Vapparent that by the construction just described
the bolt I6 serves as the pivotal point about
which the plate B moves during the course of ap
nent connections such as the prior use of welds.
plying compression to the gasket 8 and also when
It will be further apparent that the'particular
the latter is released upon disassembly. Both the 30 shape of the structure and they detailedrelation
compressing of the gasket 8 as Well as its release
of the parts ’may vary quite substantially
from such compression is accomplished by means
throughout a Wide range Without departing froml
of the set screw I3 being suitably rotated in the
the principles hereinabove described. _ Itis pro
end portion I4 thereof bearing against the out
posed therefore tliat the claims b_e notjliinited
side diameter of the straight portion of the `fit 35 other than as necessitated yby’ther Vstate of >the
ting 3.
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prior
art.
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It is apparent that a simple _and very ‘effective
means for applying a gasket to an `irregular
1. In a testing` device -,of the character de#
shaped fitting has been devised. The parts used
scribed, a saddle member having means for at
in making this clamp do not require expensive 40 tachment to a fitting to be tested, `a. yoke mem_-_
accuracy in either the assembly or .in vma
ber, the said saddle member having positioning
chining the individual parts to be assembled, and
means cooperating with said yoke member, the
yet by the nature of the construction employed
latter member having an end plate for position
substantial strength and rigidity has been ob
ing of a gasket between an annular vend portion
45
tained, it being able to resist the relatively high
of the fitting to be tested and the said plate, the
testing load applied to the fitting. The stiffen
said saddle member andend plate being adjust
ing rib 9 while shown as an integral portion of
the plate 6 may of course be suitably Welded to
the plate. Similarly, the manner of attachment
of the U shaped yoke II as indicated byl the weld
I0 may be varied, depending Yupon the size and
the shape of the fitting under consideration for
ably movable upon the fitting to be tested trans
versely relative to the annular endportion of the
said
fitting.
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2. In a testing device for a pressure vessel of
the character described, the combinationinclud
ing a plate member, the latter member having a
test.
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ribbed longitudinally extending'portion, a yoke
As indicated in the modified form illustrated in
member attached to the said plate member and
Figs. 6 to 10 inclusive, the face of the testing 55 extending transversely thereto, the said yoke pro
clamp above described .may vary substantially
viding for adjustable positioning of the said
without vdeparting from the principles involved
plate member transversely relative to an end por
in obtaining a satisfactory structure.
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tion of the pressurevessel, the plate` member
Thus in a modified form about to be described
having at an opposite'end portion Apivotal means
the split collar I1 may be replaced by a saddle,
for independent connection Withthe article to be
member preferably positioned at the crotch of
the fitting to produce the same strength and ri
3. In a testing clamp for a .plainend angle _lit
gidity of installation as described in connection`
ting, the combinationincluding a _plate mem
with the previous 'figures
, , ber, a. yoke attached _to the _said'plate member, ?
In Fig. '7 showing the application of the modi 65 the said yoke providing for adjustable position
ñed form, the header I is provided with the usual
ing vof thesaid plate member, the, plgte member
welded end connection 2 and the extension 3 with
having at an end portion thereofni‘eans for pivf.
the curved section 4, the beveled end 5 andthe
otal .connection with the- fitting' to be tested, the,
tested.
gasket 8 as previously described -in connection.
with Fig. 2. However, in this embodiment the
yoke member I9 of generally U shaped figura
tion is provided with the side legs lorposts 20 as
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. said latter means including a'split collar pivotal-.
ly attached to an end portion >of thesaid' Vplate
member.Y
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ARTHUR W.'
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