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Патент USA US2121558

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June 21, 1938.
J. 5. co: El‘ AL
Filed June 3,’ 1936
2 Sheets-Sheet l
June 21, 1938.
Filed June 3, 1936
2 Sheets-Sheet 2
M rW
Patented June 271, 1938 ‘
~ 2,121,558
John s.‘ (Joe and WllliamM. Mulholland, Water-'
_bury, Conn., assignors to The Chase Compa
nies, Incorporated, Waterbury, Conn., a corpo
ration of Connecticut
Application'June s, 1936, Serial'No. 83,198
ltClaim. (o1. 29-157;
This invention, relates to improvements in
installation of-tubuiar systems, and more par
ticularly, installations of telescopically-connect
ed ?ttings and tubes forming ?uid~transmitting
tings may be employed, such for example as cou
Y's, etc.
The ?ttings and tubes may be made of any
suitable malleable metal.
Copper and copper v
alloys are metals particularly suitable for the 5
One object of this ‘invention is to provide an . purpose. The ?ttings and tubes may be installed
improved installation of telescopically-connected 'in any desired arrangement to form systems for
?ttings and tubes forming a ?uid-transmitting > various purposes, including refrigeration and
system ‘which will not_come apart even if the
temperature of the ?ttings and tubes rises above
the melting-point ‘of solder used for sweating
the tubes and‘v ?ttings together.
sprinkler systems.
According to one method of installation, the 10\
tele‘scopically-inter?tting ?ttings and tubes may
?rst be sweated together with solder in any
Another object of this» invention is to provide‘ _known manner._ Next, depressions, such for ex-v
an improved installation of telescopically-con .ample as annular grooves 2|, are pressed or
15 nected ?ttings and tubes forming a ?uid-trans rolled into the outer of the telescopically-over- 15
mitting system which need not depend on solder lapping parts of the ?ttings and tubes." The an
, either for~maintaining the connections ?uid
nular grooves 2| are preferablyrolled to a depth .
tight or for holding the parts together.
su?icient to produce ‘an annular groove 22 and
Another object of this invention is to provide an inner annular bulge 23 in the inner member,
20 an improved method of installing the foregoing which innermember in the drawings is illustrated 20
mentioned systems.
as the tube, although it will be appreciated that
With the above and other objects in view, this l the tube could be oi.’ a size to ?t over the outside
invention includes "all improvements over the of the tubular end 24 01' the ?tting instead of
prior art which are disclosed in this application. inside, it so desired, in which case the outermost
In the accompanying drawings in which cer
annular groove would be formed in the tube and 25'
tain ways of carrying out ‘the invention are the inner groove in the tubular end 01.’ the ?tting.
By this rolling of the superposed grooves 2| and
shown for illustrative purposes:
22, in the overlapping parts'oi the ?ttings and
Fig‘. 1 is a fragmental side elevation of a tubu=
tubes, the fittings-and tubes are securely locked
lar system installed in accordance with this in
30 vention;
against any possible separation or coming apart, 30
Fig. 2 is an enlarged view, partly in section, which otherwise could readily occur in case of
?re melting the solder oi the sweat-joints, if the
of a portion of Fig. 1; _ _
tubular installation formed part of a refrigera
Fig. 3 is a view similar to Fig. -2 prior to press
tion or sprinkler system, for example, especially
_ ing 'or rolling-in the grooves;
where gaseous ?uids were present in the tubular 35
Fig. 4 is a'fragmental view of a modi?ed con
system or in part thereof, since gases in the tu
Fig. 5 is a side elevation, partly in section, of bular system would not aid much in maintaining
the system at a temperature‘below the melting
a tool for rolling-in the grooves to lock the tele
scopically-inter?tting ?ttings andtubes together;
Fig. 6 is a sectional view on line- 6-6 otFig.
>5; and
Fig. ‘7 is a sectional view on line 1-7 of Fig. 5.
In the description and claim, the various, parts
and steps are identi?ed by speci?c names for
Instead of performing the sweating operation 40
?rst, it may be performed after the groove roll
ing-in operation has been performed. Or, it the,
groove rolling-in'operation is. performed with
care, gas-tight joints can be made without the
use of any solder.
convenience, but they are intended to be as ge
neric in their application as the prior art will per
point of the solder, during a ?re.
Instead oi depending on \a. single rolled-in
Referring to Figs. 1 to 4 inclusive of the draw
50 ings, the tubular system or installation iiiv in
cludes a plurality oi’ tubes or pipes ll, I2, I3, i4,
I5, l6, l1 having telescopically-inter?tting con‘
nections with ?ttings l8, I9, 20. The particular
?ttings I8, I 9, 20 illustrated are respectively a v
cross, T and elbow, but any other forms of» ?t l
groove, a plurality oi’ grooves 2| may be rolled.
in a pair of telescoped overlapping parts,-shown
in‘ Fig. 4‘.
I For accomplishing the groove rolling-in operas 5Q
tions,v a grooving or beading-tool such'as?shown’
in Figs. 5, 6 and 7 may be used. . This tool 25 has
a pair-of supporting-members 26, 21, pivoted to
gether at 28 and soshaped asto provide a central
opening '29 adapted to accommodate a telescoped 55
back-and-forth rocking action is repeated to thus
the annular rolled-in groove. The
trated by the broken line circle 3%. Each of the tightening
of nut (it and the rolling-in action is
supporting-members 2%, 2'5 carries a pair of repeated as often as necessary until the rolled-in
rollers 3i pivoted at 32. Each roller 35 is‘ prefer
2! (Figs. 1, 2 and 4) is of the desired
ably of toolsteel and preferably has a blunt groove
preferably is when a groove 22
‘annular ?ange or head 33 forming its outer
rolled into the inner of the tele
periphery. Each roller also may have suitable
overlapping parts,
_' , / ‘
marking-means‘, which in the form shown in the scoping
By having‘a marking-means of small height
drawings, is a v-shape annular marking-?ange such
as the annular marking-?ange 34, an an 10
10 3d, the'size of} which in the drawings is shown
mark it will be formed adjacent the an
greatly enlarged for clearness, as this marking
?ange 36 could have a height of .005" more or nular groove it, when, and only when, the work
less above the cylindrical surface 3?» of the roller. man has rolled the groove 2i to the proper depth
properly join the parts.
Any other suitable form of marking-means could tovBy
the use of the rolled-in grooves ii, the
be employed in place of the annular'marking
and tubes are securely connected to~
?ange if so desired. For example, knurling could ?ttings
gether in a way readily subject to inspection
be‘ used or separate small projections could be
used, and whatever marking-means is employed, from the outside of the connections by fire under
?tting ‘and tube which is diagrammatically illus
could be located on only one of the rollers, if so
20 desired. The center planes of the annular beads
' writers or others.
33 of all the rollers will preferably lie in the
same plane.
The upper end 3% of the supporting-member
El‘ is provided with an open-end slot 3i and with
25 a concave seat 38 in its front face.
A bolt 39 has
an eye 156 pivoted at ti to the supporting-member
26. The shank d2 of the bolt 39 can swing into
and out of the vopen-end slot 371, and has its
, outer end d3 threaded into a wing-nut lid, which
wing-nut serves to press the convex face 65 of
the washer 46 against the concave seat 38 of sup
porting-member 2?. A handle d'i is provided on
the free end of supporting-member 25.
And when marking-means
such as the marking-grooves 48 are also em— 20
ployed, this serves as important visual evidence
that the rolling-in operation has been adequately
The invention may be carried out in other
speci?c ways than those herein set forth with 25
out departing from the spirit and essential char
acteristics ‘of the invention, and the present em
bodiments are, therefore, to be considered in all
respects as illustrative and not restrictive, and
all changes coming within the meaning and
equivalency range of the appended claim are
intended to be embraced therein.
We claim:
The method of installing a ?uid-transmitting
. tubular system, comprising: telescopically inter 35
relationship, with or without sweating the parts ?tting an unthreaded malleable-metal fitting
together, the bolt 3d of the tool 25 is swung up member and an unthreaded malleable-metal
Operation: After one or more ?ttings and
out of the slot 3?, whereupon the supporting
member 21 is swung open about its pivot 23 to
permit the inter?tting ?tting-and-tube construc
at tion represented by the broken circle 3% to be
placed within the central opening it, whereupon
the bolt 39 is again swung into the slot 3'? and the
wing-nut M is threaded up to tighten the convex
face 45 of the washer as against the concave seat
45 38 of the supporting-member 21, thus bringing
the annular beads 33 of the rollers 3i tightly into
engagement with the outer cylindrical surface of
theaouter of the parts indicated diagrammatically
50 at By
grasping the handle dl' and giving a back
and-iorth rocking action to the tool through an
arc of 90° or more, a shallow complete annular
groove will be rolled into the outer surface of
the outer member indicated at 30. Then the
55 wing-nut it is tightened up further, and the
tube-member; then pressing inwardly by circum
ferential roller action an outer circumferential
portion of the outer of the two said telescopically 40
inter?tting members to concurrently form an
outer circumferential groove and an inward cir
cumferential projection on both of the said
members to lock the same against axial separa
tion; and then, at substantially the completion
of the said inward-pressing interlocking action,
pressing inwardly upon the outer surface of the
outer of the two said telescopically-.interfltted
members at a point displaced axially with respect
to the said circumferential grooves on the said
members, to form a separate gauge-mark of dis
tinctly-di?’erent character from the adjacent
circumferential groove on the surface of the said
outer member.
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