Year: 1899

page_text: Date of Application, 19th Sept., 1899-Accepted, 18th Nov., 1899
THE NEW HAVEN NOVELTY MACHINE COMPANY, of 6,, Elm Street, New Haven, in
the State of Connecticut, United States of America, Manufacturers.
I, ALFRED GEORGE BROOKES, of 55, & 50, Chancery Lane, in the County of
London, Chartered Patent Agent, do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
The invention herein contained has for its object the production of a novel pipe
coupling.
Une part of the novel coupling consists of a collar having interior screw thread
at or near its larger end, the collar tapering inwardly from said screw thread to
its opposite end, said collar being adapted to be applied to a pipe, the end of the
pipe abutting the inner end of the projecting screw threaded part of the collar
The other chief part of the coupling consists of a plug having a screw threaded
cylindrical portion to engage the interior threads of the collar, and a screw,
threaded tapered portion at one end to enter the interior of the pipe, both sets
of screw threads being of the same pitch so that as the cylindrical threaded part
is screwed into the threaded part of the collar the screw threads of the tapered
portion entered within the open end of the pipe and of the same pitch, cut a
screw thread in the pipe, the end of the pipe abutting against the outer end of
the screw threaded part of the collar, the exterior of the pipe being expanded and
seated gas and watertight against the tapered interior of the collar.
The plug may have at its outer end an internally threaded and flanged run-
ning ring to engage a threaded projection of an object to which it may be
desired to attach the coupling and pipe.
To couple together the ends of two pipes I employ a double-ended plug, each
end of the plug having cylindrical and tapered threaded portions each provided
with screw threads of like pitch, both sets of threads at one end of the plug let it
be supposed, having right hand threads, and at the other end of the plug left hand
threads, each tapered end of the plug entering one end of a pipe surrounded by
a collar presenting at one end a tapered interior and at its other end a screw
thread to be engaged by one of the screw threads of a cylindrical part of the
plug, the rotation of said plug causing the cylindrical threaded portion-in-engage-
ment with the screw threads of the collar to force the tapered screw threaded
end of the plug into the pipe, the threads of the tapered portion cutting its way
into and making defined threads in the pipe.
When the end of a pipe having a coupling applied to it is to be fixed to a threaded
projection of some article, the plug is provided near its outer end with an annular
Hange, and to enable the running ring to be applied to the plug from its tapered
end, the cylindrical threaded part of the plug is provided with two or more
slots, said slots cutting the cylindrical threaded portion in such manner as to leave
a series of threaded projections.
The loose running ring has an interior thread at one end and a flange at its

page_text: other end, and this flange is notched to embrace the threaded projection left upon
the plug by forming the slots therein above mentioned, so that when the threaded
ring is applied to the plug the slots in the flange slip or slide over the threaded
projections of the plug, the flange taking seat against the inner side of the flange
of the plug, and in this condition it may be rotated, causing the threaded ring
to engage a threaded projection of a fixed object with which the coupling and
the pipe are to be connected in use.
My coupling may be applied to lead pipe and make a gas and fluid-tight joint.
The hole through the plug is of substantially the same diameter as the inner
diameter of the pipe, so in the use of my coupling the gas or water way of the
pipe is not contracted.
In one form of my invention the collar referred to has between its interior
screw thread and its tapered portion an annular groove presenting a shoulder at
one side, said shoulder being located at the end of the screw thread, the end of
the lead pipe acted upon by a shoulder of the plug and by the tapered portion of
the plug being upset or flanged, the flange entering and filling the said groove,
thus locking the pipe in the collar even though the plug should be subsequently
removed.
Fig. 1 represents in section a piece of lead pipe with the female part of my
improved coupling applied thereto.
Figs. 2, 3, and 4 are respectively an upper end, a side elevation, and a lower
end view, of the hollow plug.
Figs. 5, 6 and 7 are respectively an upper end, a side elevation, and a lower
end view, of the running ring.
Figs. 8 and 9 are respectively an upper end view, and a side elevation, of the
collar.
Fig. 10 shows a hollow mating plug which may be attached to one end of a
piece of pipe and which may cooperate with the coupling part shown in Fig. 1,
should it be desired to join two ends of lead pipe.
Fig. 11 shows a threaded projection such as commonly extended from a gas
meter to which the running ring may be attached readily.
Fig. 12 represents a coupling containing a modified form of my invention and
employed to unite the ends of two pieces of lead pipe.
Fig. 13 is a longitudinal section of Fig. 12, the left hand collar being shown
as seated properly, and the pipe fixed therein, the right-hand collar being
represented in full lines as put into position that its threaded part may be
entered by rotating the plug, the dotted lines showing the position of the collar
on the pipe when the end of the lead pipe is being fitted against or just over the
tapered end of the plug.
Fig. 14 shows the plug detached, and
Fig. 15 shows a collar on a piece of lead pipe, the latter being flanged or
upset at its ends into the groove of the collar.
The coupling represented in Figs. 1-10, containing my invention and to be
herein described, is represented as consisting of a collar 6 having at one end an
interior screw threaded portion 6, the interior of this collar from the lower end
of the screw thread to its extremity being tapered as at 62, Fig. 1, the inner end
of the screw thread presenting a shoulder against which may act the end of the
lead pipe a.
The other essential feature of the coupling herein to be claimed consists of a
hollow clamping plug C, it having a cylindrical portion provided with a screw
thread one end of said plug being reduced in diameter and shouldered at 4,
the said reduced and tapered end having also a series of screw threads which are
of the same pitch as the screw threads on the cylindrical portion of the plug.
The end of the plug opposite that which is tapered and threaded is provided
with a suitable flange as c¹ preferably formed integral with the plug, but it will
be obvious that the flange might be made as a separate ring and applied to the
plug but the solid shoulder is preferred.

page_text: The flange shown in Figs. 1 and 3 forms a seat for the flanged inner end ²
of a loose running ring d provided with an interior screw thread.
To apply the loose threaded ring in the best form, the cylindrical readed
portion is provided with a series of slots, one of which is represented in Fig. 3,
thus cutting up the cylindrical threaded portion into a series of screw threaded
projections, and the flange d² of the loose running ring d is slotted, as shown in
Fig. 5 to leave a series of recesses do to enable said running ring to be slipped
into position Fig. 1, from the inner tapered end of the plug before inserting the
plug into the collar.
Assuming that the end of the lead pipe has been put onto the tapered end *
of the collar C, and that the inner end of the pipe abuts substantially the inner
end of the screw thread of the collar, then in such condition the smaller tapered
end of the plug will be inserted loosely into the collar at its screw threaded
end, the said tapered end entering slightly the open end of the pipe substantially
as the threads of the cylindrical portion engage the threads of the collar,
and thereafter by rotating the plug it being clamped and turned in any usual
or suitable manner, as the threads are screwed into the threaded part, the
threads on the tapered part of the plug, they being of the same pitch as the
threads on the cylindrical part of the plug, will act and cut their way into the
interior of the lead pipe, and as the said threads are all of the same pitch, it
will be obvious that the threads of the tapered portion will not strip the interior
of the lead pipe.
As the tapered portion is screwed into the open end of the lead pipe, the latter
is stretched or expanded somewhat, and seated, as represented in Fig. 1,
exteriorly closely against the interior of the collar b, and as the shoulders c
at the lower end of the threaded portions meet the upper end of the pipe they
act to somewhat overturn and throw out the upper end of the pipe into a groove
made in the interior of the collar at the base or lower end of the threads b¹
therein.
Fig. 10 shows a mating plug C₁, it having a cylindrical surface provided with
threads and a tapered surface provided with threads ct such as described in
connection with the plug C, but said mating plug has at its extremity, instead
of the flange, a screw thread c¹ of a pitch suitable to be engaged by the screw
threads of the loose running ring d, the said two parts C and C when united by
the running ring having preferably a suitable washer placed between the
extremity of the plug and the plug C.
Fig. 11 shows part of a gas meter with its threaded projection e, and in prac-
tice the threaded running ring d may be screwed upon the threaded portion e of
the meter, thus connecting the pipe à gas tight with the meter.
It will be understood that the coupling represented in Fig. 1 and clamped to
the lead pipe a as therein representeil, may be employed to connect a lead pipe
with any externally threaded part extended from a wash bowl, bath tub, beer
pump, or any other machine, implement, or device with which it is desired to
connect a lead pipe either for the entrance or the exit of a fluid or gas.
The drawings Figs. 12, 13, 14 and 15, show the invention herein contained
adapted in an excellent form to unite the ends of two lead pipes A, B.
The coupling in this embodiment of this-invention--is represented as composed
of a plug Chaving two like opposite ends, each end presenting at its extremity
a tapered portion provided with screw threads, a shoulder 2, and a cylindrical
portion of larger diameter e, provided with screw threads, the pitch of the
Screw threads in the cylindrical portion and the tapering portions being the same,
as fully described in connection with the other figs.
Cooperating with each end of this plug is a collar 1) having a screw threaded
portion at one end, and tapered internally at its opposite end, the collar present-
ing an annular groove d, said groove being located between the inner end of the
threaded portion of the collar and the tapered portion thereof.
Fig. 13 at the left hand side shows the pipe fully clamped in position by the

page_text: coupling composed of the plug and collar, but at the right the dotted line shows
the collar D shoved upon the end of the pipe as it will be in practice before the
end of the pipe is abutted against the end of the tapered portion of the plug, the
end of the pipe being started a little bit on or put in proper position with relation
to the tapered end of the plug so that said tapered portion, when the plug is
rotated by the engagement of the screw thread of the cylindrical portion with the
screw thread of the collar, will enter readily the end of the pipe, and as the plug
is rotated and the cylindrical threaded portion enters the threaded portion of the
collar, the threaded tapered portion of the plug enters the end of the pipe, the
thread on the tapered portion cutting its way into the pipe, making and leaving
a screw thread, and finally the shoulder of the plug by abutting against the
end of the pipe which has been expanded somewhat by the tapered portion of
the plug, is overturned and upset into the annular groove, leaving a flange upon
the end of the pipe which enters said groove so firmly that, should the plug be
removed, the pipe will be retained in the collar.
It is believed that this invention is the first to provide a plug with two series of
screw threads of like pitch, said threads being located externally on parts of the
plug of different diameter, one of said series of screw threads, aiz., the one enter-
ing the lead pipe, presenting a tapered exterior, so that said screw threads
gradually cut their way into the lead pipe and somewhat expand the same, while
the other series of screw threads enter the screw threaded part of a surrounding
collar.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is-
1. A pipe coupling for coupling lead pipe, consisting of an internally threaded
collar, and a hollow plug having a tapered screw threaded end, and a cylindrical
portion having a screw thread, the thread of the cylindrical portion of the plug
engaging the screw threaded part of said collar, while the threads of the tapered
end enter and make threads in the interior of the pipe.
2. In a coupling for lead pipe, a collar tapered internally and threaded inter-
nally, and a hollow plug presenting a cylindrical threaded portion, and a tapered
threaded portion, said screw threads on both said portions being of the same
pitch, the thread of the cylindrical portion engaging the internal thread of the
collar, while the thread of the tapered portion enters and cuts its way into the
interior of the pipe.
3. In a pipe coupling or connection, a collar provided with an internal screw
thread at one end, and tapered at its other end; a hollow plug having at one
end a tapered portion provided with a screw thread, and next said conical por-
tion a circular portion of greater diameter provided with a screw thread, a flange
at that end of the plug opposite its tapered threaded end, and a loose running ring
surrounding said plug behind said shoulder and provided with a screw thread to
engage a threaded projection or plug with which the pipe clamped between the
collar and plug is to be connected.
4. In a pipe coupling or connection, a collar having a screw thread, a hollow
plug having at one end a tapered screw threaded portion and next thereto a series
of threaded projections, and beyond said projections a flange, and a threaded ring
having notches and applied to said hollow plug, the notches of the ring sliding
over the said projections as the ring comes into position against said flange, the
threads of the projections entering the threads of the collar, while the threads of
like pitch on the tapered portion of the plug cut their way into the interior of
the pipe.
5. In a coupling for lead pipe, an external collar provided at one end with an
interior screw thread, the interior of said collar being tapered from said screw
thread to its opposite end; and a hollow plug provided with two sets of screw
threads of substantially the same pitch, said threads being made on parts of said

page_text: plug of different diameter, the endmost series of screw threads being on a tapered
part of said hub of least diameter, said threads being adapted to cut their way into
the interior of a lead pipe, the plug having a shoulder between the two series of
screw threads to contact with the end of the pipe, the screw threads of greatest
diameter entering the screw threads of the collar.
6. In a coupling for lead pipe, an external collar provided at one end with an
interior screw thread, the interior of said collar being tapered from said screw
thread to its opposite end; and a hollow plug provided with two sets of screw
threads of substantially the same pitch, one made on a tapering part of said plug
and the other on a cylindrical part of said plug, the threaded cylindrical part of
the plug being of greater diameter than the tapering part of the plug, a shoulder
being left between the said two series of screw threads to abut against the end
of the pipe when the tapering portion is screwed into the pipe and the cylindrical
portion is screwed into the threads of the surrounding collar.
7. A pipe coupling composed of a hollow plug presenting at each end a
threaded cylindrical portion terminated by a tapered threaded portion, and two
collars threaded to engage the threaded cylindrical part of the plug, and tapered
to correspond substantially with the taper of the plug.
S. A pipe coupling composed of a hollow plug presenting a threaded cylindrical
portion, and a threaded tapered end, the cylindrical portion and the tapered
portion being separated by an annular shoulder, and a collar threaded internally
at one end, the collar having within it at the end of the screw thread an annular
groove, the collar being tapered internally from said groove towards its ends and
contracted in diameter.
9. In a lead pipe coupling, a plug having at its opposite ends a tapered portion,
and between said tapered portion and the centre of the length of the plug a cylin-
drical portion, a series of screw threads cut on said tapering and cylindrical por-
tions of the same pitch, and collars internally threaded at one end and tapered
internally at their opposite ends, the threaded parts of said collars being adapted
to be applied to the cylindrical threaded parts of the plug, the tapered threaded
parts of the plug being adapted to enter and cut threads in, and hold and engage
a lead pipe fixedly in place within the collars.
Dated the 19th day of September 1899
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.