Improvements in Pipe Couplings.
Year: 1895

page_text: Date of Application, 10th Sept., 1895-Accepted, 2nd Nov., 1895
COMPLETE SPECIFICATION.
Improvements in Pipe Couplings.
We WILLIAM CURLETT, Architect of 806 Market Street, San Francisco
California U.S.A. and WILLIAM REINHART JOST, Clerk, also of 806 Market
Street San Francisco California U.S.A. 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 :-
My invention relates to improvements in that class of detachable pipe-couplings
for connecting a lead or soft metal pipe-section with an iron or hard metal
section;
In the accompanying drawings:
Figure 1, is a section of my improved coupling, which is adapted to effect the
connection of one or two lead pipe-sections to an iron section, and :
Fig. 2, is a similar view of a modified construction adapted to effect the connection
of a lead pipe-section to an iron pipe-section.
Referring by letter to said drawing, and more particularly to Figure 1, thereof:-
A, indicates an iron pipe-section which is exteriorly threaded; B, indicates soft
metal pipe-sections, and C, indicates the coupling sleeve which is interiorly
threaded for the engagement of the thimble or thimbles and it is provided at or
adjacent to its middle with an annular flange D, the inner edge of which is
threaded as shown, to engage the exteriorly threaded pipe-section A.
E, indicates the hard metal thimbles of the coupling. These thimbles have
their outer ends contracted as shown, and they are provided at their opposite endl
with exterior threads a, which are designed and adapted to engage the interior
threads of the coupling sleeve.
In using my improved coupling to connect a section of lead or soft metal pipe,
and a section of hard metal pipe, the hard metal section is screwed into engagement
with the threads of the annular flange D, and a hard metal thimble E, is placed on
the lead or soft metal section. The end of the soft metal section is then flared
Ly any suitable device and the hard metal section is introduced therein, after
which the coupling sleeve is screwed up on the hard metal section when the interior
threads of said coupling sleeve engaging the exterior threads a, of the thimble E,
will draw said thimble toward it. This movement of the thimble E, will force
the soft metal of the section B, into the spaces between the threads of the section A,
and will crowd the end of said section B, between the thimble and the annular
flange D, of the coupling sleeve; and consequently it will be seen that the
connection between the two pipe sections A, B, is rendered thoroughly water-tight
and there is no liability of the said sections being casually disconnected which is
a desideratum.
When my improved coupling is employed to connect two sections of soft metal
pipe to a section of hard metal pipe, a short section or union of hard metal pipe
and the two thimbles are employed and the connection is effected in the manner
illustrated in Fig. 1.
In Figure 2, of the drawing, I have shown a more simple construction of coupling
This
for connecting a soft metal pipe-section B, and a hard metal section A.
construction comprises a hard metal thimble E, similar to those shown in Fig. 1,
but the coupling sleeve C, which is provided with interior threads to engage the
exterior threads of the thimble, differs from the coupling sleeve, shown in Fig. 1,
inasmuch as its annular flange D', which is interiorly threaded to engage the
section A, is at its end instead of at an intermediate point of its length.

page_text: In using this modified construction of coupling, the hard metal pipe-section is
screwed through the annular flange D', of the coupling sleeve, and the thimble E,
is placed upon the soft metal section. The hard metal section is then introduced
into the end of the soft metal section which has been previously flared, after which
the coupling sleeve is screwed up on the hard metal section. when the interior
threads of said coupling sleeve engaging the exterior threads a, of the thimble E,
will draw said thimble toward it, and the soft metal of the section B, will
consequently be forced into the spaces between the threads of the section A, and
the end of said section B, will be crowded between the thimble and the annular
flange D', of the coupling sleeve for the purpose stated.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
―
1. The herein described pipe-coupling, comprising a soft metal pipe-section
having its end flared, an exteriorly threaded hard metal pipe-section inserted in
the end of the soft metal section, the hard metal thimble mounted on the soft
metal pipe-section, and having its outer end contracted and provided at its opposite
end with exterior threads, and the coupling sleeve having interior threads engaging
the exterior threads of the thimble and also having a threaded annular flange
engaging the exteriorly threaded hard metal pipe-section, substantially as and for
the purpose set forth.
2. The herein described pipe-coupling, comprising two soft metal pipe sections
having their contiguous ends flared, an exteriorly threaded hard metal pipe-section
mounted in the ends of the soft metal sections and interposed between the same,
the hard metal thimbles mounted on the soft metal pipe-sections and having their
outer ends contracted and provided at their opposite ends with exterior threads and
the coupling sleeve having interior threads engaging the exterior threads of the
thimbles and also having a threaded annular flange engaging the exteriorly threaded
hard metal pipe section, substantially as and for the purpose set forth.
Dated this 10th day of September 1895.
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.