Improvements in Frames for Velocipedes.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Frames for Velocipedes.
HENRY STANBRIDGE 136 Wellesley Road Chiswick W Engineer do hereby declare
the nature of this invention to be as follows:-
This invention relates to frames where the stays connecting the front forks to the
saddle pillar tube are doubled, known also in the trade as duplex frames. The tube
in which the front forks rotate has the usual lugs wherein the stays are brazed, & my
invention consists in forming the ends of the Duplex stays D shape, no matter whether
the said stays are oval or round or already D shape. The two D shape ended stays
are fitted into the said lugs in circular Recesses & either wedged or rivetted for
brazing or joining. I also unite the two ball stays if necessary to the saddle pillar
tube by a similar arrangement. In order to obtain for male riders' machines the
same advantages as women's machines have now I omit the top stay of the present
diamond frame & in place thereof and also of the straight bottom stay carry four
continuous tubes, two on each side from the front fork to the centre of the back
wheel, omitting the chain stays. These tubes may be curved-forming two helices,
the saddle pillar tube is joined by brackets midway between the front forks & the
centre of back wheel to the four tubes. The said four stays may be D shape, oval
or round.
Dalad th 20th day of ta1007
HENRY STANBRIDGE 136 Wellesley Road Chiswick London W 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 relates to a new and improved method of constructing the frames
of velocipedes.
Fig 1 shows a side view of a frame for a single track bicycle.
Fig 2 is a section of the same on the line x-x.
Fig 3 is a top view of the same with the back stays removed.
Like letters in all figures indicate similar parts, and I now proceed to describe the
same with reference to the accompanying drawings :-
A is the steering head with lugs a¹, a².
"
B is one of the rear axle plates to which the "D or other shaped tubes and 63
are joined at Z.

page_text: B¹ is the other rear axle plate to which the other "D" or other shaped tubes 6º
and bare joined at 7.
The other ends of the said "D" or other shaped tubes 61 and 62 are joined and
enter the lug a' and the similar ends of the tubes 63 and 6' are joined and enter the
lug a².
C is the saddle pillar column.
c¹ is the lug into which the back stays D are united.
E is a bracket uniting the four tubes 61, 62, 63 and b⭑.
e is a boss on the bracket E in which the crank axle is mounted.
F is the rear axle or spindle.
The back stays D may be fastened to the saddle pillar column C in the usual way
if preferred.
The said "D" or other shaped tubes 61, 62, 63, 64 are by preference curved forming
two helices as illustrated in Fig 1. I may however also leave them straight, when
the steering is consequently lowered and a smaller front steering wheel can be used.
At suitable places the said "D" or other shaped tubes 61, 62, 63 64 can be joined by
horizontal and or vertical stays, thus strengthening the frame if necessary.
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. The combination of four continuous "D" or other shaped tubes, curved or
straight, uniting the said steering head A having lugs a¹ a² with plates B and B¹
carrying the spindle or axle of the driving wheel, and having midway between the
plates B and B and the steering head A a bracket supporting the saddle pillar
column C, substantially as described and illustrated in the accompanying drawings.
Dated this 1 day of November 1897.