An Improved Brazeless Joint for connecting the Component Members of Cycle Framings.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
An Improved Brazeless Joint for connecting the Component Members
of Cycle Framings.
I, HENRY SLACK RAINFORTH, of "The Uplands," Lincoln, in the County of
Lincoln, Engineer, do hereby declare the nature of this invention to be as follows:
:-
This invention consists in an improved. brazeless joint for connecting together
the component members of cycle framings, its chief characteristics being simplicity,
rigidity, and security. It is. distinguished by differential coned parts upon the
tubular member and coned seatings upon the other member in combination with a
jamming or locking screw nut or ring, all arranged so as to ensure contact of the parts
of the connection only at points fore and aft in the joint. The ordinary lugs
which connect up the component frame members are used, but with a slight differ-
ence in their bore, and as the construction of all the joints in a cycle framing
are practically identical it will suffice to describe the invention in connection with
one only.
In connecting the end of the top front frame bar to the crown lug of the seat
pillar by my improved joint the parts require to be constructed as follows:-
The horizontal extension of the crown lug, which forms a socket, is bored out a
little larger than the diameter of the tubular end of the framing member it is
adapted to receive, and at the extreme inner part thereof is formed an angular coned
seating, the smallest diameter of which latter is innermost. The bore of the
socket, approximately at its mouth, is internally screwed for a short distance, the
diameter of the said bore being that of the larger diameter of the coned seating.
The end of the tubular frame member, to fit into the socket, as aforesaid, and to
be there affixed, is enlarged or constructed with a collar which is shaped into
differential or reversed annular coned parts, one part, at the extreme end of the
tubular member, being coned in a direction to fit the coned seating, before described,
in the bore of the socket part of the crown lug, and the other coned in a reverse
direction; the two coned parts being divided by a reduced diameter. Threaded
upon the tubular member inwards of the double coned collar or enlarged end, as
before described, is an externally screwed nut or ring, adapted to screw into the
wormed mouth of the socket before described. The end nearest the double coned.
collar of this screwed nut or ring is internally hollowed-out and formed into a
coned sinking, identical in pitch to the inner coned part of the collar or enlargement
upon the end of the tube, and when the differentially coned part of the tube is
within the socket and the nut is screwed into the screwed mouth thereof, the coned
sinking of the screw nut impinges upon the inner coned portion of the tube's
collar and forces the outer coned portion upon the annular coned seating within.
the socket part of the lug and, when the screw nut or ring has been fully screwed
home, a dead grip upon the tubular member is the result.
The differentially coned collar is rigid upon the end of the tubular member,
but the same is formed from a short length of tube by spinning, or from a stamping,
and is forced upon the end of the tubular framing member and rigidly fixed by a

page_text: cross peg or its equivalent; this being the least expensive method of forming the
differentially coned enlarged end.
As a modification, instead of the coned parts upon the end of the tubular member
and inside the socket, an enlarged externally screwed parallel end is formed upon
the tube, adapted to screw into the socket portion of the lug which is wormed to
receive it. A clamping ring or nut with a screwed shank split longitudinally into
sections is threaded upon the tubular member in the same manner as the nut in the
previous arrangement described, and the screwed shank, which is slightly coned,
is adapted to screw into the mouth of the socket part of the lug and to grip onto
the tubular member it surrounds by the action of the coned screwed nut being
forced into the parallel screwed socket. Thus a connection having, as it were,
fore and aft points of contact only is obtained, the enlarged end forming two points
with the innermost portion of the socket, and the coned shank the other two points
with the outer portion of the socket.
W. P. THOMPSON & Co.,
11, Burlington Chambers, New Street, Birmingham,
Agents for Applicant.
An Improved Brazeless Joint for connecting the Component Members
of Cycle Framings.
66
I, HENRY SLACK RAINFORTII, of The Uplands," Lincoln, in the County of
Lincoln, 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 consists in an improved construction of brazeless joint for con-
necting together the component members of cycle's framing, the chief charac-
teristics of which are neatness, simplicity, security and absolute rigidity. The
invention is designed to supersede the brazed joint now generally used, which is
expensive, on account of its requiring to be trimmed or finished, weak, on account
of the softening of the parts amalgamated, and imperfect, in consequence of the
metal being burned or over-fused.
According to this invention the brazeless joint, which is a permanent one, is
distinguished by a differentially coned collar part rigid upon or with the tubular
member, a coned seating upon the other or socket member, which has a screwed
socket or mouth, and a jamming or clamping screw nut or ring, adapted to screw
into the mouth of the socket and to surround the tubular member, and having a
coned seating within its bore to pull up against the coned collar as aforesaid.
In the accompanying sheet of drawings the invention is practically set forth;
reference letters being used thereon to distinguish the parts, which will be herein-
after fully described. The invention is shown in the drawings applied to connect
the end of the top front frame bar with the crown lug of the socket head, Fig. 1
illustrating the parts connected and Figs. 2 and 3 the parts before being connected;
the horizontal extension of the socketted head being broken in section for the
purpose. Fig. 3 is a transverse section of Fig. 1 upon the dotted line A B.
The horizontal extension a³ of the crown lug a³ of the socket head a, which is to
form a socket for the end of the tubular frame member, is bored out a little
larger than the diameter of the said tubular member, and at the extreme inner
part thereof is formed an annular coned seating a', the smallest diameter of which
is innermost of the socket's mouth. The bore of the socket for a distance inwards

page_text: of its mouth as is screwed at a6, the diameter of the said screwed part being a little
larger than the largest diameter of the coned seating at.
The end of the tubular frame member c, which is to fit within the socket
member a and to be there permanently and rigidly affixed, is enlarged or con-
structed with a collar upon it shaped into differentially or reversed annular
coned parts cc, the latter coned part which is at the extreme end of the tubular
member being coned in a direction to fit the coned seating a, before described,
within the bottom of the bore of the socket extension a³ of the lug a², and the
former coned part, which is outwards of the latter one, being in an opposite
direction thereto; the two coned parts being either divided by a reduced diameter
or running into each other. Within the bore of the end of the tubular
member c, so as to tightly fit it and to extend the length of the collar c³, is inserted
a tubular piece or liner e for the purpose of strengthening internally the said
tubular member at the point where the collar embraces it. The liner e is
necessary in consequence of the collar 3, which is made separate from the tube,
being forced upon the end c² of the tubular member c, which for the most part
affixes it. As a further security against the collar becoming loose cross pins or
pegs are passed through it and the middle of the tube. The said collar may
be sweated upon the tube if necessary or otherwise affixed, but in every case it is
absolutely and permanently rigid with the said tube.
A jamming or clamping screw nut or ring d, which is the pulling-up component.
in the joint, is threaded upon the tubular member c prior to the coned end being
forced on.
This clamping nut or ring is bored outwardly at d², to fit nicely over
the tube c, and inwardly at d³, to the counter-part of the coned part 4 of the
collar 3, and its exterior d is screwed to fit the screwed mouth a6 of the socket
extension a³. There is also a slight annular collar on the circumference of this
clamping nut or ring for the purpose of laying hold of it with a spanner or wrench
for pulling together the said parts, but after the said parts have been once con-
nected the annular parts are removed as the joint is a permanent one.
In making the joint the differentially coned collar of the tube c is first placed
in the socket extension a3 so that the coned part e seats itself within the coned
seating a within the lug extension. The clamping ring d is now drawn over the
differentially coned collar c3 and its screwed part made to engage the screwed
mouth of the lug extension a³. This screwing up of the clamping ring causes
its coned bore to, after a time, impinge against the coned part of the collar c
and on further screwing to force the coned collar onto the coned seating at and jam
it between that part and the bore d³ of the clamping ring. When the clamping
ring has been forced home to its full extent the angles are removed from the part d
by suitable means, and the joint will not again become loosened.
A cross peg passed through the parts may if necessary, form an extra means of
security.
The parallel part of the clamping nut or ring d. fits stiffly the tube c and forms
an extended bearing upon the same, but it will be observed that the primary
gripping parts of the joint are, theoretically, the coned faces c¹ and c5 of the collar c
and their seating, as the centre of the coned collar or the meeting edges of the coned
parts are not gripped.
In Fig. 4 is shown a modification where a single coned part c* is only formed
upon the end of the tubular member c and the full length of the bore of the
clamping nut & made parallel. In this form of joint the end of the screwed
clamping nut works against a shoulder c³ between the tube and the coned part,
and forces the said coned part onto its coned seating a
In Fig. 5 another modification is shown with a single coned part upon the end
of the tubular member c, but in this case it is formed in a reverse direction and
extended. The coned seating in the socket is dispensed with, but an abutment &
for the end of the coned collar is formed at the bottom of the said socket. The
clamping ring d has an extended coned bore ³ which fits the coned collar upon the

page_text: tubular member and clamps it in position by its screwing up action within the
socket.
In these modifications as described a transverse peg may if necessary form an
extra security against the joint working loose, but from practical experience it is
believed that this will not be necessary.
The double or single coned collar-part or enlargement may be formed upon the
end of the tubular member c by expanding the end of the tube to the largest
diameter required and then again contracting it into a cone or over a separate
coned bush, or by spinning up the metal of the tube's end at the required point
so as to form the larger diameter parts.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is--
First. In combination in a brazeless joint, a tubular or he-member c having
rigid upon its connection-end a differential or double coned collar part or enlarge-
ment, a socket extension or a she-part a³ having a coned seating a to fit the
coned part of the collar and a screwed part a within its bore, and a clamping
ring or nut adapted to embrace the part c and having a coned part d³ within its
bore and an externally screwed part d for the purpose of engaging respectively
the coned part 4 of the tubular member and the screwed part a of the socket
extension a³, substantially as described.
Second. In combination in a brazeless joint, a tubular or cylindrical member c
having made fast upon its connection end a differentially coned collar or enlarge-
ment and provided with a liner e, a socket extension a³ having a coned seating a
to fit the coned seating 5 of the collar and a screwed part within its bore,
and a clamping ring or nut d adapted to slip on the part and having a coned part d³
and a parallel part within its bore and an external screwed part 4, the said
parts being adapted to engage with and fit the parts c¹, c, and a³, respectively,
substantially as described."
Third. In combination in a brazeless joint, a tubular member having rigid
upon its connection end a differentially coned collar supported internally by a
liner e and affixed in position by pins or pegs e², a socket extension a having a
coned seating a and a screwed part a within its bore, and a clamping ring or nut d
adapted to slip on the tube c and provided with a coned seating d³ and a parallel
part d² within its bore an externally screwed part and a facetted collar d³
for operating it, substantially as described.
1000
W. P. THOMPSON & Co.,
11, Burlington Chambers, New Street, Birmingham,
Also of Liverpool, London and Manchester,
Agents for Applicant.