Improvements in Joints for Cast Iron Pipes.
Year: 1891

page_text: Date of Application, 17th July, 1891
Complete Specification Left, 17th Oct., 1891-Accepted, 21st Nov., 1891
PROVISIONAL SPECIFICATION.
Improvements in Joints for Cast Iron Pipes.
I, JOHN JEFFREYS Heating Engineer 7 Little Queen Street Westminster do
hereby declare the nature of this invention to be as follows:-
In this invention two small lugs are cast on opposite sides of each end of the
pipe and a loose circular collar with lugs for bolts is passed over the meeting ends
of the pipes for which purpose a slot is provided in the collar large enough to clear
the top lug cast on the pipe with sufficient clearance to allow the collar to be first
passed over the lug on underside obliquely to the axis of the pipe doing away with
the necessity of a second slot on the underside of the collar. Between the ends of
the pipe to be jointed an elastic ring is inserted. The two collars are then slightly
turned to pass the clearing slot and catch the lugs on the pipes and bolted together
compressing the elastic ring with which the joint is made.
Dated this 17th day of July 1891.
JOHN JEFFREYS:
COMPLETE SPECIFICATION.
Improvements in Joints for Cast Iron Pipes.
I, JOHN JEFFREYS Heating Engineer 7 Little Queen Street Westminster 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:
In this invention the ordinary socket arrangement is dispensed with, the ends
of the pipes (which for high pressures are usually faced) butted, and the joint
made with a ring A of indiarubber or other elastic material placed between them.
The coupling is made in the following manner. At each end of the pipe the metal
is slightly thickened out to form a ring B of convenient width and two small
projecting lugs C C are cast opposite to each other on the outside of this ring.
The ends of the pipes are lathe faced and slightly hollowed out to form a A as shewn
at I. I. on drawing. A loose metal collar D of L section with ears on opposite
sides for bolts is then passed over each end of the pipe to be jointed, for which
purpose two slots E. E. are formed in the collar to clear the projecting lugs on the
pipe. The collar is then turned round until locked by the lugs, the indiarubber
ring A is then placed between the meeting ends of the pipes and the two collars D D
bolted together.
The joint above described is set forth on drawing Figs. No. 1 & 2.
When a pipe has to be cut to a special length the joint is made in the following
manner.
A shallow socket F with faced external edges is fixed to the end of the cut pipe
with two steel set screws. These set screws have concave ends with sharp cutting
edges so that the pressure of the screw is sufficient to secure the socket to the pipe
without drilling. The collar G, shaped for the purpose is first passed on to the
pipe followed by an indiarubber ring H. The socket is then fixed in position and
the pipe which now has a faced end is jointed in the manner described and shewn
on Figs. 1 & 2. The use of the indiarubber ring H at the back of the socket is to
seal the joint between the socket and the pipe, which is effected by the pressure of
the coned edges of the collar G against the ring forcing it into the V shaped cavity
formed in the back of the socket.
The joint above described is set forth on drawing Fig. No. 3.

page_text: By duplicating the joint last described two cut pipes can be joined together as
set forth on drawing Fig. No. 4.
The several joints herein described are applicable to connections of all kinds such
as elbows, tees, crosses, syphons, &c., and the pipes may be made of cast or wrt.
iron or any other suitable material.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
(1) The fixing lugs C. C. formed on the end of the pipe in conjunction with the
slots in the coupling collars D. D. and the locking arrangement applied to a pipe
joint as set forth in Figs. 1. 2 & 3 on drawing.
(2) The A shape formed by the hollowed meeting ends of the pipes in connection
with the rubber ring, by which means an hydraulic joint is obtained as shewn on
drawing at I. I. in Figs. 1. 3 & 4.
(3) The method of sealing the joint to a cut pipe at the back of the socket F,
having special reference to the coned edges of the collar G and the cavity in the
socket F by which great lateral pressure of the indiarubber ring on the pipes is
effected as set forth in Figs. 3 & 4.
(4) The ends of the pipes and fittings being alike, right and left pieces are
dispensed with.
(5) Increased facility for removing a damaged pipe or fitting there being no
sockets to displace, and each joint forming a connector.
Dated this 17th day of October 1891.
JOHN JEFFREID.