Improvements in or connected with the Driving Gear of Velocipedes.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in or connected with the Driving Gear of
Velocipedes.
I, FRANK JONAS ABBOTT of Acorn Villa Hurst Road, Bedford, Gentleman,
do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in or connected with the driving gear of
velocipedes, the object being to provide driving mechanism in such a manner that
the wheel on the back hub is driven from the centre of the spindle instead of from
the outside as heretofore, while the wheel carried by the bottom bracket instead of
being arranged upon one side is mounted in the centre in such a manner that the
whole driving of the machine is central instead of being at one side, thus ensuring
greater stability and steadiness, while it also tends to prevent side slip and causes
more equal pressure upon the bearing surfaces.
In carrying my invention into practical effect, the centre of the back hub is
furnished with a bell shaped flange or extension to the outer edge of which the
usual spokes of one side of the wheel are secured, the spokes at the other side
being arranged in the usual manner, while within this bell shaped flange or
extension is arranged a suitable bevel wheel. In a like manner I arrange a second
bevel wheel mounted in the centre of the bottom bracket said bevel wheels gearing
or meshing with corresponding bevel wheels mounted one upon each end of a spindle
or connecting rod. The connecting rod is mounted or carried in suitably arranged
bearings and the frame of the velocipede may be altered or modified to suit the
requirements of my invention.
1000
COMPLETE SPECIFICATION.
Improvements in or connected with the Driving Gear of
Velocipedes.
1, FRANK JONAS ABBOTT of Acorn Villa Hurst Road, Bedford, Gentleman,
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:-
My invention relates to improvements in or connected with the driving gear
of velocipedes, the object being to provide and arrange driving mechanism of the
bevel wheel type in such a manner that the wheel on the back hub is mounted
and driven approximately at the centre of the said hub instead of upon one side

page_text: as heretofore, while the wheel carried upon the crank shaft within the bottom
bracket, instead of being arranged upon one side is mounted in the centre of
the said crank shaft, and in such a manner that the whole of the driving gear of
the machine is approximately central instead of being at one side as has hitherto
been the case, thus ensuring greater stability and steadiness, while it also tends
to prevent side slip and causes more equal pressure upon the bearing surfaces.
In order that my invention may be fully understood, I will now proceed to
describe same with reference to the accompanying drawings, in which,
Fig. 1 is a side elevation of the bottom bracket, back hub, and improved gear in
connection with same.
Fig. 2 is a sectional plan of the back hub with its gearing, drawn to an enlarged
scale.
Fig. 3 is a sectional plan of the bottom bracket also drawn to an enlarged scale.
Throughout the views like letters of reference indicate corresponding parts.
In carrying my invention into practical effect, the back hub h is furnished with
a bell shaped flange to the outer edge f¹ of which the spokes s of that side of the
wheel are secured, said hub being furnished upon the opposite side with a flange of
the usual form f carrying the spokes s¹.
At or near the centre of the hub h, and within the bell shaped flange f the bevel
wheel w is screwed in position and locked by means of a nut n, said bevel wheel
gearing with a second wheel w¹ arranged at right angles to same and mounted upon
one end of rod or spindle r, which passes through and is contained within one of
the side tubes t of the frame of the velocipede. The end of this spindle is
furnished with a bearing cone c employed in connection with the hardened steel
cup c which slips over the end of tube t, and is secured in position by the clamp a
(Figs. 1 and 2). The opposite end of rod r carries a bearing cone 6 taking into
bearing cup b', the extreme end of said rod carrying bevel wheel w gearing or
meshing with bevel wheel w³ arranged approximately in a central position upon the
crank shaft g, and contained within the bottom bracket B which is sufficiently
enlarged for this purpose. d, d, are set screws locking the bearing cups d', d', of
the bottom bracket.
Upon the cranks m, m, being operated in the usual manner, the wheel wis
revolved which in turn actuates the wheel w³, the motion being then transmitted
through the rod r to the wheel w' and from thence to the wheel w on the back
hub of the velocipede.
The whole of the gear may be enclosed by suitable covers, a small cap such as a
for instance being provided to cover the opening o (Fig. 1) while suitable caps
such as y, y, are provided and take between the flange f¹ and a second flange f
provided for this purpose, so as to protect the gear, but I do not restrict myself to
any particular form of covering cap or caps.
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 driving gear for velocipedes the arrangement of the driving wheels w, w
in an approximately central position upon the back hub h and the crank shaft g,
substantially as herein described and shown, and for the purposes specified.
2). In combination with a gearing for velocipedes such as herein described, a
hub such as having a bell or cup shaped flange or extension such as f, substantially
as herein described and shown with reference to Figs. 1 and 2 of the accompanying
drawings.
3). The improvements in gearing for velocipedes comprising the employment of
a wheel w arranged approximately in a central position upon the hub within the
bell or cup shaped flange or extension f and the wheel w³ arranged in an
approximately central position upon the crank shaft g within the bottom bracket B,
in combination with the wheels w¹, w, the connecting rod r, and hollow stay or
tube t, substantially as herein described and shown, and for the purposes specified.

page_text: 4). The improvements in or connected with the driving gear of velocipedes,
substantially as herein described and shown, and for the purposes specified.
Dated this 3rd day of March 1897
F. G. CASSELL
(Of Cassell & Co.),
22, Glasshouse Street, Regent Street, London, W.,
Agent for the Applicant.
F. G. CASSELL
(Of Cassell & Co.),
22, Glasshouse Street, Regent Street, London, W.,
Agent for the Applicant.