Year: 1896

page_text: Date of Application, 3rd Nov., 1896
Complete Specification Left, 3rd Aug., 1897-Accepted, 4th Sept., 1897
We SAMUEL EARNSHAW HOWELL, Sheffield Tube Works, Wincobank, Sheffield,
Manufacturer, and THOMAS LITTLER, 12 Derwent Street, City of Sheffield Engineer,
do hereby declare the nature of our invention to be as follows:-
Our invention relates to improvements in the means for coupling together the
ends of pipes in an effective manner, and it refers to pipes of both large and small
diameters.
In carrying out our invention we propose according to one method, to couple the
ends of unflanged tubes as follows:-
We prepare the end of each tube with one or more clamping holes according to
the diameter of the tube, situated near to the edge, and corresponding in position
with each other, and we provide staple shaped clamping pieces to enter these holes
when the ends of the pipes are brought together, and thus when in such position
preventing the tubes being drawn away from each other.
A coupling socket is made with its internal diameter large enough to pass over
the projecting back of the clamps, and having an internal flange at one end
corresponding with the external diameter of the tube, and at the other end it is
provided with an external flange with holes for bolts to be passed through.
Over the junction we place a broad metallic ring prepared with apertures to
receive the clamping pieces when they are put in position, the back of the clamp
will then be flush with face of the ring.
The edges of the ring are vee shaped circumferentially.
On each side of the ring we place other rings of rubber, asbestos, or other packing,
and over all we place the socket.
A gland ring with an outside flange provided with bolt holes, has its unflanged
edge inserted into the open end of the socket, and when bolts are passed through
the flange, and screwed up, the packing rings before mentioned are pressed against
the vee edges of the metallic ring and expanded against both the tube and the socket,
making the joint.
Instead of providing the coupling socket and the gland with flanges and bolts,
we may thread the inside of the socket, and the outside of the gland, and screw
them together.
In cast metal pipes the metallic ring may be made in parts, and the clamps may be
cast upon it if desirable.
By using two narrow rings instead of one broad metallic ring, bearing against
shoulders in the socket, and providing elongated holes in the tubes, expansion and
contraction in the tubes may take place without causing leakage.
Dated the 2nd day of November 1896.

page_text: We SAMUEL EARNSHAW HOWELL, Sheffield Tube Works, Wincobank, Sheffield
Manufacturer, and THOMAS LITTLER, 12 Derwent Street City of Sheffield Engineer,
do hereby declare the nature of this invention and in what manner the same has
to be performed, to be particularly described and ascertained in and by the following
statement:
Our invention relates to improvements in the means for coupling together the
ends of pipes in an effective manner, and it refers to pipes of both large and small
diameters.
In the annexed drawing we illustrate a satisfactory manner of carrying out our
invention but it will be understood that variations in the mechanical details may be
made without departing from the invention.
Fig. 1, is an elevation of one of our couplings as applied to the smaller class of
pipes.
Fig. 2, vertical section of same.
Fig. 3, shows the pipe ends with the coupling ring in position, and holes in the
pipes.
Fig. 4, the coupling bit or clamp.
Fig. 5, a modified plan for larger pipes.
In carrying out our invention in the manner shown in Figs. 1 and 2 for example
in order to couple the ends of the tubes or pipes T and T2, we prepare the end of
each tube or pipe with one or more clamping holes H, the number being determined
by the diameter of the pipe, they are placed near the edge and correspond in
position with each other.
We provide staple shaped clamping bits or clamps C, shown in Fig. 4, the two
prongs of which will fit into the holes H, when the ends of the pipes are brought
together, and thus hold them in that position.
Over the junction of the pipes we place a broad metallic ring R, fitting upon
the pipes and having an aperture A, (or more than one) to receive the body of the
clamping bit C, which when in position will be flush with the outside of the ring.
The annular ends of the said ring are of a vee shape by preference, and on each
side of the ring we place other rings of rubber or other suitable packing P, and over
these parts we place a coupling socket C S.
The coupling socket is made with its interior large enough to pass over the ring R,
and clamp C, one end being partly closed by the internal flange IF, fitting upon
the pipe T2, and the other end having an external flange E F, provided with bolt
holes.
A corresponding gland ring G, fits into the open end of the socket, against
the outer packing, it has also a flange and bolt holes to correspond with that of the
socket.
When the bolts B, are screwed up the packing rings are forced against the edges
of the ring R, and expanded against both the socket and the pipes, thus making the
joint.
If preferred we may dispense with the bolts B, and screw the gland G, into the
socket CS.
In the plan illustrated in Fig. 5, the principle is the same, but the construction is
modified to suit a larger class of pipes.
Instead of the socket, C S, before described, we use two flanged rings or glands G³
& G³, which are drawn together by bolts B', within a central ring D, which encloses
the coupling ring R, the clamp C, and packing rings P.

page_text: For large work the coupling ring R, may be made in sections, and clamping pins
may be either cast upon such sections or be affixed thereto.
If the holes H, are elongated expansion or contraction of the tubes may take place
without leakage.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what we
claim is :-
1. A pipe coupling constructed as hereinbefore described and set forth.
2. In coupling together the ends of unflanged pipes, the use of a clamping bit C,
a ring R, packing rings P, and means for compressing same, as hereinbefore described
and shown.
3. In a coupling for unflanged pipes, the combination of a ring such as R, with
clamping pins either fixed or removable to engage with holes in the pipes for the
purpose specified and substantially as herein before described.
Dated the 30th day of Inly 1897.
ROBT. F. DRURY, C.P.A.,
Agent for Applicants.