Improvements in Velocipedes.
Year: 1893

page_text: Date of Application, 20th Nov., 1893
Complete Specification Left, 20th Aug., 1894-Accepted, 13th Oct., 1894
PROVISIONAL SPECIFICATION.
Improvements in Velocipedes.
We, JOSIAH BROOKES, HENRY JAMES BROOKES, Cycle Manufacturers, and
PHILIP LOUIS RENOUF, Works Manager, all of The Cape Works, Grove Lane,
Smethwick, in the County of Stafford do hereby declare the nature of this
invention to be as follows:-
Whereas it is usual in velocipedes in which the motive power is transmitted from
a crank shaft to a wheel axle, to connect the bearings of the shaft and the axle by
one tubular stay or strut, or a pair of stays running directly from the shaft to the
axle, we prefer to provide a pair of tubular stays, situated in the same plane as the
chain or other connecting mechanism; one stay being above, and one below such
mechani m.
These stays may be of circular, oval or section and may be formed
out of a single piece of tubing, thus surrounding the whole transmitting gear; by
the addition of a pair of longitudinal plates this gear will be readily enclosed for
the exclusion of dust and mud. Adjustment is provided by an eccentric or by a
slot device, preferably in combination with sheet shields and a screw or an
expansion locking device. Sometimes a third stay is run from bearing to bearing
in the usual way.
Dated this 18th day of November 1902
JOSIAH BROOKES.
HENRY JAMES BROOKES.
PHILIP LOUIS RENOUF.
COMPLETE SPECIFICATION.
Improvements in Velocipedes.
JOSIAH BROOKEs and Henry JAMES BROOKES, trading as J. & H. Brookes,
of The Cape Works, Smethwick, in The County of Stafford, Cycle Manufacturers,
and PHILIP LOUIS RENOUF, of the same address, Manager to the said
J & H. Brookes 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
following statement :-
It is usual in velocipedes, in which the motive power is transmitted from a crauk
shaft to a wheel axle, to connect the bearings of the shaft and of the axle by one
tubular stay or strut, or a pair of tubular stays, running directly from the shaft to
the axle, and in most cases one chain stay is led between and through the lines of
the chain: the strains are therefore not met directly and the stays are frequently
bent and twisted; further, where a narrow tread" is desired they have to be bent
or otherwise set off to provide sufficient clearance to miss the tyre of the wheel and
the larger chain wheel; great difficulty and inconvenience and even danger are
experienced when the chain has to be encased.
We therefore provide a pair of stays, situated in the same plane as the chain or
other connecting mechanism, one being above and one below such mechanism.

page_text: These stays may be of annular, oval or of ☐ section and may be formed out of a
single piece of tubing, thus surrounding the transmitting gear. By the addition of
a pair of longitudinal plates this gear will be readily enclosed for the exclusion of
dust and mud. Adjustment may be provided by an eccentric or by a slot device,
preferably in combination with sheet shields, and a screw or an expansion locking
device.
Referring to the drawings,
Figs. 1 & 3 represent the rear or main portion of a "diamond" frame velocipede.
The stay usually provided between the axle bracket A and the back wheel axle B
is omitted on the chain side but retained on the far side as indicated by the
dotted lines.
1
Fig. 2 shews a front view of the axle bracket, wheel and cranks corresponding to
Fig. 1, part of the ordinary tubular framework being removed.
In these figures E is the chain wheel mounted by the side of the axle bearing
bracket A; C and D are the two stays, one directly above, one below the chain,
and in the same plane as the chain, mounted permanently on the rest of the frame
work by means of lugs or joints as shewn. It is evident that, the chain-wheels
being between these stays, these latter are subject to compression strains only which
they can easily resist, but not to torsion.
i..
"
In Fig. 3 the two chainstays are replaced by CC, an endless tube (shewn in
section at C¹), surrounding the chain and chain wheels, and rigidly attached to the
main frame. It is evident that a covering: of leather or other material may be
easily stretched over C C so as to form a protecting cover for the chain or other
transmitting mechanism, or that the sides may be closed for the same purpose by a
pair of sides of metal, celluloid, or other stiff or stiffened material, preferably.
furnished with a pressed or spun edging, or of the form shewn in Fig. 5, so as to
form a complete boxing.
•
}
Fig. 6 shews a section of the latter kind of casing, mounted between the
☐ shaped stays C C. Where the protection of the chain from dust is. to be
absolutely perfect, and the usual back slot adjustment for the chain tension involves
a complication of slides, we prefer to use the eccentric bottom bracket shewn in
Fig. 4; as a pair of discs mounted on the bracket and in contact with the sides of
the cover provide sufficient protection. The bracket is secured in its place by
means of tapered keys & m provided in the circumference of the eccentrics: these
are traversed by a bolt or screw o; by screwing up the latter, these keys travel
along the inclined key beds and expand against the straps p, q, which form part of
the main framework.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what, manner the same is to be performed, we declare that what we
claim is :
IT..
of
1. On velocipedes, mounting a pair of compression stays, between those parts
the frame which support the wheel bearings and the crank shaft or "bottom
bracket" bearings, so that these stays lie in the same plane as the chain or other
transmitting agency, one above and one below the same, fo
for the purpose
described.
I
2. On velocipedes, mounting the pair of compression stays C. D. Fig. 1 in the
position and for the purpose described.
"
1.
3. On velocipedes, the tubular framework encompassing the chain or other
transmitting gear, substantially as described.
4. The combination of a tubular framework with a light covering, and forming
gear case, substantially as described.
&
5. The shaped stay or pair of stays mounted above and below a chain or
similar transmitting gear in the manner and for the purpose described.
6. The plain chain or gear cover illustrated in Figs. 5 & 6 to be mounted on a
safety frame without being pierced or traversed by a chainstay, but to be mounted
between a pair of external stays, substantially as described.
1)

page_text: 7. On velocipedes the method of locking an eccentric bearing bracket in the
manner and for the purpose described.
JOSIAH BROOKES.
HENRY JAMES BROOKES.
PHILIP LOUIS RENOUF.