Improvements in Pipe Joints, said Improvements being Especially Applicable to India Rubber and Gutta Percha Tubes and Hose.
Year: 1888

page_text: Improvements in Pipe Joints, said Improvements being Especially
Applicable to India Rubber and Gutta Percha Tubes and Hose.
I, ISAAC BLUE HARRIS Superintendent of the North British Rubber Company's
Works, Castle Mills in the City of Edinburgh, 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 relates to improvements in joints or couplings for pipes more
especially for flexible pipes tubes or hose made of india rubber or gutta percha
although one modification of the said coupling is also applicable to rigid or vulcanite
gutta percha and india rubber tubing and to metal pipes.
The invention is illustrated on the appended drawings and as applied to flexible
india rubber tubes it consists as seen in vertical section of one modification at figure 1.
and in end elevation at figure 2 in forming collars a of hard rubber or vulcanite at
the ends of the flexible tube sections the said collars being united to the softer
rubber of the flexible pipe or tube in any of the ways well known to india rubber
manufacturers for uniting pieces of hard and soft rubber together. The collars which
have outwardly projecting flanges a are so joined to the body of the pipe or tube
that the bore of the pipe is maintained the same throughout and the adhesion of the
flexible tube to the hard rubber collars is sufficient to enable the joint of sections or
lengths of the pipe or tube to be made by bolts and nuts as indicated at b.
In making the joint the flanges a¹ may either come face to face as indicated at
figure 1 a ring or washer m of soft india rubber leather or the like being placed
between them to ensure a tight joint or the flanges a¹ may be set back on the
collars a as seen at figure 3 in which case a thimble ring m is slipped over or clamped
upon the meeting ends of the collars a to prevent the packing ring from being
forced out of position by inward pressure.
Under another modification illustrated in section at figure 4 and in end elevation
at figure 5 the lengths or sections of the flexible pipe or tubing c are formed or
furnished with hard rubber or vulcanite collars d without flanges these collars having
screw threads cut on the exterior on to which a nut or union piece e is screwed to
effect the junction of two lengths or sections of the pipe or tube together or instead of

page_text: of
employing the nut or union piece e the hard rubber or vulcanite collars d may be
formed with shoulders f as indicated at figure 6. Against these shoulders rings
metal made in halves screwed together as seen at figure 7 are fitted the said rings
having lugs i formed upon them through which bolts are passed, nuts & being
screwed on the ends of these bolts to secure the sections or lengths of the pipe or tube
together. The rings g are made in halves to enable them to be placed in position on
the collars d and instead of the ring being flat each half of it may be cupped as indi-
cated at figures 8 and 9 the halves being bound together after they have been adjusted
in position by a band I slipped over them or by screws as at figure 7. With each of
the arrangements figures 6 to 9 a washer or ring m of soft india rubber, leather or the
like, held in position by a metal washer or ring m¹ is or may be inserted between the
meeting faces of the collars d to ensure a tight joint, or with these arrangements and
also with the arrangement figure 2. the washer m may be dispensed with the thimble
ring m only being used.
The modifications figures 6 to 9. besides being applicable to flexible india rubber
and gutta percha pipes or tubes are equally applicable to vulcanite or hard rubber
tubing and to metal pipes the collars d being cast or formed integral with such
pipes.
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. Forming or providing sections or lengths of flexible india rubber and gutta
percha pipes or tubes with hard rubber or vulcanite collars at the ends thereof and
outside of the body of the pipes or tubes substantially as herein before described.
2. For flexible india rubber and gutta percha pipes or tubes the joint hereinbefore
described with reference to figures 1 and 2 of the drawings.
3. For flexible india rubber and gutta percha pipes or tubes the joint hereinbefore
described with reference to figure 3 of the drawings.
4. For flexible india rubber and gutta percha pipes or tubes the joint hereinbefore
described with reference to figures 4 and 5 or the drawings.
5. For india rubber gutta percha and metal pipes or tubes the joints substantially
as hereinbefore described with reference to figures 6, 7, 8 and 9 of the drawings.
6. In a pipe joint the metal clipping or binding ring m¹ surrounding or not a
rubber, leather or other like ring or washer as and for the purpose set forth.
Dated this Twenty-first day of September 1888.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow,
Agents.