Improvements in Gear Cases for Velocipedes.
Year: 1893

page_text: Date of Application, 18th May, 1893
Complete Specification Left, 17th Mar., 1894-Accepted, 21st Apr., 1894
PROVISIONAL SPECIFICATION.
Improvements in Gear Cases for Velocipedes.
We, JOHN HENRY BOREBANK and GEORGE BAILEY of The Trent Cycle
Company, Limited, Long Eaton, in the County of Derby, Cycle Manufacturers,
do hereby declare the nature of this invention to be as follows:
11
This invention relates to gear cases for enclosing the chain and chain wheels of
velocipedes or like vehicles and it has for its object improvements in such gear
cases so that they may be readily attached to the vehicle, or detached.
.
The following description refers more especially to a gear case applicable to a
rear driven safety bicycle and means for attaching the same, but modifications of
the arrangement described may be made so as to make it applicable to a tricycle or
other vehicle.
The case is made preferably of the shape required to entirely enclose the chain
and chain wheels, openings being provided in the sides for the axle and hub to
which the respective chain wheels are attached and the chain stay or back leg of
It is formed in two
the framing which passes in an inclined direction across it.
parts the point of division intersecting the openings in each side of the casing and
is preferably hinged together at one end and secured at the other by any suitable
arrangement. Where the two parts of the case meet the edges may overlap each
other or strips may be secured on the inner or outer side of one part which strips
fit inside or outside and overlay the other part in order to prevent the entrance of
dust. A sliding shutter may also be fitted on the outer side to reduce the length
of the opening at the rear end of the chain stay so that the length of the opening
may be adjusted to allow the road driving wheel axle to be adjusted for taking up
slack in the chain.
The casing is attached by means of preferably two clips which embrace the
chain stay, they are fixed at the points where the stay passes through the sides of
the casing and are provided with upward and downward extensions which fit into
sockets formed on the upper and lower parts of the case.
With this arrangement the case may be readily removed by releasing the free
ends of the two parts and opening them out, the sockets on the case being by this
operation withdrawn from the extensions on the clips and the case released. The
clips which may be secured by detachable straps and screws may also be removed
if desired.
Dated this 18th day of May 1893.
W. P. THOMPSON & BOULT.
Agents for the Applicants
COMPLETE SPECIFICATION.
Improvements in Gear Cases for Velocipedes.
We, JOHN HENRY BOREBANK and GEORGE BAILEY, of The Trent Cycle
Company Limited of Long Eaton, in the County of Derby, Cycle Manufacturers,
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 gear cases for enclosing the chain and chain wheels of

page_text: velocipedes or like vehicles and it has for its object improvements in such gear
cases so that they may be readily attached to or detached from the vehicle.
The following description refers more especially to a gear case applicable to a
rear driving safety bicycle and improvements for attaching the same, but modifica-
tions of the arrangement described may be made so as to make it applicable to a
tricycle or other vehicle.
It will be best understood by reference to the accompanying drawings in
which
Fig. 1 is a side elevation of a gear case constructed according to my invention
applied to a bicycle and Figs. 2 and 3 are cross sections taken respectively on the
lines x x and y y of Fig. 1.
Like letters indicate like parts throughout the drawings.
The case is preferably made of the shape shown so as to entirely enclose the
chain and chain wheels, openings are formed in the two sides at the end a' for the
axle and bracket, and in the inner side at the end a' for the hub of the driving
wheel, openings are also formed for the chain stay b which passes, in plan, in an
inclined direction across the case.
The case is formed in two parts a a the point of division intersecting as shown
all the openings described. The two parts are preferably hinged together at the
end a and secured at the end a preferably by projecting lugs c one on each part
through which a screw or bolt c¹ is passed.
Where the two parts a a of the case meet the edges may overlap each
other, or strips d may be secured on the inner or outer side of one part which
strips may fit inside or outside the other part, in order to prevent the entrance of
dust.
A sliding shutter e may also be fitted on the outer side of the end a* in order to
partially cover a slotted opening for the wheel axle and to allow of adjustment of
the latter.
The case is held in position by means of preferably two clips ff secured to the
chain stay b, they are preferably fixed at the points where the stay passes through
the sides of the case, one being on the inner side near the end a¹ and the other
on the outer side near the end a. The clips are formed with the upward and
downward extensions which enter into sockets ġ secured to the inner or outer
side of both the upper or lower parts of the case when the two parts are brought
together as shown.
:
With this arrangement the case may be readily removed by releasing the free
ends a when it may be opened out, the sockets g are at the same time withdrawn
from the extensions f₁f on the clips and the case may be removed from the chain
stay b.
In some cases the extensions f' may be permanently secured to or form part of
the stays b, the positions of the extensions and sockets g may also be reversed
and the latter secured to or formed on the stayib.
1
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 ;-
1. A gear case for a. velocipede formed in two parts. provided with sockets or
extensions such as g or fl fitting on to or into extensions or sockets secured to
the framing substantially as described and illustrated in the accompanying
drawings.
2. A gear case for velocipedes formed in two parts provided with sockets. such
as g to receive extensions of the stay 6 or clips f. secured thereto substantially
as described and illustrated in the accompanying drawings.
b
3. A gear case longitudinally divided in which the stay passes through to the
outside and the case is there directly secured to the stay substantially as described
and illustrated in the accompanying drawings.
L

page_text: 4. The combination and arrangement of parts forming the complete gear case
and means for attaching it to a velocipede substantially as herein described and
illustrated in the accompanying drawings.
Dated this 14th day of March 1894.
GEORGE BAILEY.
W. P. Thompson & Boult,
Agents for the Applicants.