Improvements in Bicycle Frames.
Year: 1896

page_text: Date of Application (in United Kingdom), 31st July, 1896
Complete Specification Left, 31st July, 1898-Accepted, 7th Nov., 1896
COMPLETE SPECIFICATION.
Improvements in Bicycle Frames.
I, CHARLES EDWARD TOMLINSON, of Number 111 Garfield Avenue, in the City of
Syracuse, in the County of Onondaga, and State of New York, United States of
America, Draftsuan, 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 an improved frame, particularly applicable for use in the
manufacture of bicycles, and has for its object the production of a simple, cheap,
and substantial connection for the frame members; and to this end the invention
consists in the improved construction and combination of parts as hereinafter fully
described and set forth in the claims. In describing this invention reference
is had to the accompanying drawing, in which like letters indicate corresponding
parts.
Figure 1 is a side elevation of a bicycle-frame embodying this invention, a
portion of the front fork being shown in operative position.
Figure 2 is a plan view, partly in section, of the crank-hanger of said frame, the
crank being shown in operative position.
Figure 3 is an end view of the crank-hanger, the crank and its bearings being
omitted.
Figures 4 and 5 are respectively horizontal and vertical sections, taken on lines 4-4
and 5-5, Figure 3.
Figure 6 is a vertical section, taken on line 6-6, Figure 2.
An
A represents the crank-hanger, or main tube, and B the head of a bicycle-frame
embodying this invention. Said crank-hanger is formed of a metallic tube, usually
of steel, and is usually equipped at opposite ends with suitable ball-bearings a.
axle a provided with pedal cranks a, is passed through said ball-bearings and a
supplemental tube A' which is arranged longitudinally within the tube A and is
usually provided with an oil-feeding tube A2. Secured to the crank-hanger tube A
are suitable frame-members which usually consist of a central post C, a forwardly
extending lower strut C, and the members or bars CC of a rearwardly extending
lower fork. The attaching ends of these frame-members are passed through orifices
in the wall of the tube A and are firmly secured together and to the supplemental-
tube A'. Said ends of the frame-members CC preferably extend across the interior
of the tube A, above and below the tube A'; in the form of a V, and their extremities
are mitered to each other on the line c, and extend into a slot a in the base of said
tube A. The tube A' is thus passed through the members CC at their junction c
and is firmly embraced thereby. The fork-members are preferably extended into
the tube A through orifices in its wall and their extremities are cut concave.or
segmental and abut against the tube A', thereby partially embracing said tube.

page_text: The adjacent surfaces of the tubes, A A', and the frame-members CO C² are brazed
together, and pins c are usually passed through the frame-members CC (for
engaging the inner face.of..the tube A and holding said frame-members in position
before and after the brazing thereof. Said parts are additionally secured together by
reinforcing tube-sections having their adjacent edges mitered ou the line c and
brazed together so as to form a single piece, and their opposite extremities inserted
within the members C C' and brazed thereto. In securing the frame-members (C¹(
to the tubes A A', the ends of the members CC Care cut as described; the
members C C are inserted within the tube A, are provided with the pins c', and their
mitered edges are brazed together; a hole of proper size is bored through the
adjacent extremities of the, members C Cands the tube A is inserted and brazed in
position; and finally, the members Care inserted, are provided with the pins c', and
are brazed to the tubes A A. The described construction and arrangement of the
tubes A A' and the members CCC are particularly, practical and effective as said
parts are firmly interlocked, are easily secured together, are prevented from
independent movement and present a pleasing appearance.
The operation of this invention will now be readily understood
to the foregoing description and the accompanying drawing.
upon reference
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. In a bicycle-frame the combination of a main tube, a supplemental tube disposed
longitudinally within said main tube, and frame-members inserted through the
sides of the main tube and fastened to the supplemental tube, substantially as and
for the purpose described.
..2. In a bicycle-frame the combination of a main tube, a supplemental tube disposed
longitudinally within said main tube, tubular frame-members inserted through the
sides of the main tube, and reinforcing tubes united in the main tube and
extending into the aforesaid frame-members and fastened to the supplemental
tube, substantially as and for the purpose specified.
3. In a bicycle-frame the combination of a main tube, a supplemental tube
disposed longitudinally within said main tube, tubular frame-members inserted
through the sides of the main tube, and reinforcing tubes formed in one piece
having its central portion straddling the supplemental tube and fastened thereto,
and its end-portions extending into the, aforesaid frame-members, substantially as
and for the purpose set forth.
4. The combination with a crank-hanger tube, of tubular frame-members inserted
through the sides of said tube and united in the central portion thereof, substan-
tially as and for the purpose specified.
5.The combination with a crank-hanger tube, of tubular frame-members having
their ends extended across the interior of said tube and their extremities mitered
to each other and rigidly united, substantially as and for the purpose described.
.6.. The combination with a crank-hanger tube, of tubular frame-members having
their ends extended across the interior of said tube and their extremities. united
at opposite sides of the axis of the tube, substantially as and for the purpose
set forth.
7.The combination of a crank-hanger tube provided in one side of its axis with
orifices, and in the opposite side with a slot, and tubular frame-members inserted
through said orifices and mitered to each other inside of said tube and seated in
the aforesaid slot and all firmly united, as set forth.
8.1 The combination with the crank-hanger. tube, of a supplemental tube secured
longitudinally within said crank-hanger tube, branch tubes extending from the supple
mental. tube through the side of the crank-hanger tube, the tubular frame-members
having their ends extended across the interior of the crank-hanger-tube and their
extremities mitered. to each other and, embracing between them the said supplemental
tube, as set forth.

page_text: 9. The combination with the tube A; of the frame-members CO having their
ends extended across the interior of said tube and united at their extremities, the
tube A¹ passing through the junction of said members, and the fork-members C* (*
having their ends inserted through the side of the tube A', all of said parts being.
permanently united by brazing, as set forth.
Dated this 5th day of November 1896.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, W.C., Agents for the Applicant..