Improved Construction of Joints and Connections for Metallic Tubular Structures, such as are used for the Underframes of Railway Carriages and Wagons, Girders and Frames for Bridges and Buildings, and for Tubular Poles for Electrical Conductors, for Masts, Railings, and the like.
Year: 1894

page_text: Date of Application, 11th Dec., 1894
Complete Specification Left, 14th Aug., 1895-Accepted, 28th Sept., 1895
PROVISIONAL SPECIFICATION.
Improved Construction of Joints and Connections for Metallic
Tubular Structures, such as are used for the Underframes of
Railway Carriages and Wagons, Girders and Frames for Bridges
and Buildings, and for Tubular Poles for Electrical Conductors,
for Masts, Railings, and the like.
We, GEORGE EARL CHURCH, C.E. and GEORGE WATSON ETTENGER, M.E.,
both of Dashwood House, 9 New Broad Street, in the City of London, do hereby
declare the nature of this invention to be as follows:-—
Our invention relates to an improved construction of joints and connections for
metallic tubular structures such as are used for the underframes of railway carriages
and various other purposes.
According to our invention we employ for the connection of lengths of tubes,
either to each other or to headstocks or transverse members, whether flat or curved,
tubular sockets having an internal screw thread into which are screwed the threaded
ends of the tubes, the sockets being extended up the tube some distance beyond the
threaded portion thereof so as to strengthen the tube against the liability to fracture
at the threaded portion thereot, such as occurs when the sockets, as heretofore
constructed, do not extend beyond the threaded portion.
For the above purpose, the internal threads of the sockets are formed in relief
upon them, or in other words the non threaded extension is of a diameter to
accurately fit the non threaded part of the tube, while the internal diameter of
the threaded part is formed to fit the thread cut into the end of the tube.
Such sockets, when employed as means for jointing two lengths of tubes together
may either be made so as to extend over the ends of both lengths of tube, with a
non-threaded portion at each end, and with external means, such as flats, for turning
the same by a spanner; or each length of tube may be provided with a separate
socket, having flanges at the end by which the two sockets are firmly secured
together by bolts or rivets. This last described arrangement offers facilities for
securing the tubes to flat transverse members of carriage underframes, or tie plates
of other structures, by extending such members or plates between the flanges of the
sockets and securing them by the same bolts or rivets that secure the sockets
together. For strengthening such flanged sockets they are by preference formed
with gusset plates extending from the socket to the flange, and either formed in
one therewith, or secured thereto. This construction of flanged socket is also
applicable for fixing the ends of the tubes to the head stocks of carriage under-
frames, or to transverse frames or plates of other structures, and in this case the
gusset pieces may be so formed as to present flat faces on one or more sides of the
socket so as to afford means for fixing other parts of the framing to them.
As by the above construction of joints, the jointed parts can be made as strong
as or even stronger than the tubes themselves, our invention affords convenient
means for enabling such tubular structures to be constructed in comparatively short
lengths for convenience of transport.
Dated this 11th day of December 1894.
ABEL & IMRAY,
Agents for the Applicants..

page_text: Improved Construction of Joints and Connections for Metallic
Tubular, Structures, such as are used for the Underframes of
Railway Carriages and Wagons, Girders and Frames for Bridges
and Buildings, and for Tubular Poles for Electrical Conductors,
for Masts, Railings, and the like.
We, GEORGE-EARL CHURCH, C.E., and GEORGE WATSON ETTENGER. M.E.,
both of Dashwood, House, 9 New Broad Street, in the City of London, 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:—
Our invention relates to an improved construction of joints. and connections for
metallic tubular structures such as are used for the underframes of railway carriages
and various other purposes. According to our invention. we employ for the
connection of lengths of tubes, either, to. each other, or to headstocks or trans-
verse members whether flat or curved, tubular sockets. having an internal screw
thread into which are screwed the threaded ends of the tubes, the sockets being
extended, up the tube.some distance beyond the threaded, portion thereof, so, as to
strengthen the tube.against the liability to fracture at the threaded portion thereof,
such as occurs when the sockets, as.heretofore constructed, do,not extend beyond the
threaded portion..
For the above purpose, the internal threads. of the sockets are formed in, relief
upon them, or in other words the non threaded extension is. of a diameter to
accurately fit the non threaded part of the tube, while the internal diameter of the
threaded part is, formed to, fit the thread cut into the end of the tube. Such sockets
when employed, as means for jointing two lengths of tubes together, may either be
made so as to extend over the ends, of both lengths of tube, with a, non-threaded
portion at each end, and with external means, such as flats, for turning the same
by a. spanner; or each length of tube may be provided with a separate socket,
having flanges at the end, by which the two sockets. are. firmly secured together by
bolts, or rivets. This last described arrangement offers facilities for securing the
tubes to flat transverse members of carriage underframes, or tie plates of other
structures, by extending such, members or plates. between the flanges. of the
sockets and securing them by the same bolts or rivets that secure the sockets
together. For strengthening such flanged sockets they are by preference formed
with gusset plates extending from the socket to the flange, and either formed, in
one therewith, or secured thereto.
This. construction of. flanged socket is also applicable for fixing the ends of the
tubes. to the head stocks of carriage underframes, or to transverse frames or plates
of other structures, and in. this case the gusset pieces may be so formed, as to
present flat faces on one or, more sides of the socket so as. to. afford, means. for
fixing other parts, of the framing to them..
As by the above construction, of, joints, the jointed parts. can be made as. strong
as or even stronger than the tubes themselves, our invention affords. convenient
means, for enabling such tubular structures. to be constructed in comparatively short
lengths, for convenience of transport.
Fig. 1 of the accompanying drawing shews a section of part of a tube provided
with a flanged socket for securing it either to the similarly provided end of another
length of tube or, as shewn on the drawing, to, a headstock or transverse member of
any structure.
Fig. 2 shews two lengths of a tube secured together by means of a single socket
without flanges.