Improvements in Making the Soldered Joints of Lead Pipes.
Year: 1894

page_text: Date of Application, 16th Feb., 1894
Complete Specification Left, 13th Nov., 1894-Accepted, 19th Jan., 1895
PROVISIONAL SPECIFICATION.
Improvements in Making the Soldered Joints of Lead Pipes.
ROBERT HOLT Civil Engineer People's Palace Mile End Road London E. in
the County of Middlesex do hereby declare the nature of this invention to be as
follows:-
This invention consists of a narrow ferule or ring of tinned metal placed over
the outside of two metal (say) lead pipes at their point of junction and which
have previously been prepared for soldering in the usual way.
The joint of the pipe and the metal ring is then wiped over with solder precisely
in the way usually done by plumbers except that the ring is likewise covered and
embraced with the solder a body of which may be left on the ring or all wiped off
its outer surface.
The rings must be of a metal that cannot be melted by the solder, and they may
be in one or more parts and various forms.
Dated this 15th day of February 1894
COMPLETE SPECIFICATION.
Improvements in Making the Soldered Joints of Lead Pipes.
I, ROBERT HOLT, of The People's Palace, Mile End Road, London, E., in the
County of Middlesex, Engineer, 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 :-
This invention has for object to enable soldered joints on lead pipes to be made
in an easy, quick and economical manner and so that the joints shall not be porous
as is frequently the case with wiped solder joints made in the manner heretofore
usual.
For this purpose in making soldered joints on lead pipes according to this
invention, a narrow ferrule or ring of tinned metal is placed over the outside of
two lead pipes to be joined at their point of junction the pipes being previously
prepared for soldering in the usual way. The joint between the pipe ends and the
metal ring is then wiped over with solder according to the way of wiping usual
with plumbers, except that the ring is likewise covered and embraced with the
solder, a mass of which may be left on the ring, or all of which may be finally
wiped off the outer surface of the ring. The ring should be of a metal not liable
to be melted at the temperature at which solder is ordinarily used, and it may be
in one piece, or in two or more annular parts one surrounding or overlapping
another, and be of various forms.
The accompanying illustrative drawings shew ways in which my invention can
be advantageously carried into practical effect,
Fig. 1 being a longitudinal section, showing my pipe joint in its simplest form.
A A' are the pipes to be joined the ends a a¹ of which are tapered to enter one
into the other, and B is the tinned metal ring which is arranged over and concentric
with the pipe ends so as to form therewith a space to receive the solder C, the ring
being held in the position shown by the outwardly flanged or tafted back end
portion a² of the pipe A' over which it is pushed after the pipe ends have been
prepared in the usual way for soldering. The pipe ends and ring being in the
[Price 8d

page_text: relative positions shown, solder is poured over the top of the ring so as to heat it,
a greased cloth being held underneath in the ordinary way and whereby the solder
is caused to enter the ends of the ring and fill the space between the ring and pipe
ends, after which the surplus solder is wiped off so as to leave the parts c c of the
joint in the form shown.
Fig. 2 is a longitudinal section, and Fig. 3 a cross section on the line xx, showing
a slightly modified arrangement in which the ring B is provided at one end with
a series of inwardly extending projections B¹ adapted to fit around the pipe A¹
and assist in holding the ring B more firmly and correctly in position than in
the arrangement shown in Fig. 1, the spaces between the said projections
permitting of the passage of the solder C into the corresponding end of
the ring.
Figs. 4 and 5 are similar views to Figs. 2 and 3 showing a further modification
in which the ring B is provided at one end with an inwardly extending annular
flange B2 to assist in holding it in place, and recesses or grooves a² are formed in
the outer edge of the tafted back portion a' of the pipe A' to permit the solder C
to readily flow to the annular space between such portion a¹ and the said flange B².
The solder C is applied to the joints shown in Figs. 2 to 5 inclusive, in the manner
herein before described with reference to Fig. 1.
Fig. 6 is a side elevation and Fig. 7 a cross section on the line y, y showing the
mode of making a soldered joint between two pipes arranged at right angles to
each other. In this case the pipe A¹ is perforated at the part where the pipe A is
to be connected therewith, the hole being flared outward and the end of the pipe A
tapered to fit the hole as shown. The ring B having been passed over the end of
the pipe A, the latter is inserted in the hole in the pipe A' and the ring is allowed
to rest upon the latter and is held concentric, or nearly so, with the former by the
inwardly turned projections B¹ at its upper end. Solder is then poured into the
ring from the top, some of it escaping through the openings between its lower end
and the top of the pipe A¹, where it is wiped off as shown at c', the upper end
of the joint being wiped off as shown at c.. The lead covering of electric
cables forms piping the joints of which may with advantage be made as herein
described.
By confining solder within an outer ferrule or ring surrounding the juxtaposed
pipe ends as described, the molecular structure of the solder immediately around
the juxtaposed pipe ends is not disturbed by the wiping operation, as it is liable to
be when making a wiped joint in the ordinary way, and the joint can be made with
less solder and in a neater manner than usual.
Furthermore the liability of causing obstruction in the joined pipes by the
deposit therein of solder such as obtains with the ordinary method of making wiped
joints, by my invention obviated or practically so.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
-
1. The herein described method of joining lead pipes placing a metal confining
ferrule or ring on the juxtaposed prepared pipes where they are to be joined
together, pouring solder over the said ferrule or ring causing the solder to enter
and fill the space between the ferrule or ring and the pipes and wiping off surplus
solder, substantially as herein before described.
2. My improved pipe joint as described with reference to the examples illustrated
in the drawings annexed.
A
W. Lloyd Wise,
ROBERT HOLT.
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.