Improvements in Gear Cases for Cycles and the like Machines.
Year: 1895

page_text: Date of Application, 23rd Dec., 1895
Complete Specification Left, 22nd Sept., 1896-Accepted, 14th Nov.,
1893
PROVISIONAL SPECIFICATION.
Improvements in Gear Cases for Cycles and the like Machines.
1 EDMUND POWELL of 37 Wellingboro' Road Northampton Shoemaker do
hereby declare the nature of this invention to be as follows:-
:-
To thoroughly protect from dust dirt and other substances the gearing of cycles
and the like machines (whether driven by manual foot or other power).
And by making the gear case to cover the wheels and chain only and not the
whole of the intervening space between the chain to lessen the wind side pressure
on machines using such gear cases.
Also a means whereby a cheap, simple gear case can be produced and one
which admits of quickly tightening the chain without the necessity of removing
the chain and in addition as hereinafter explained permits of the necessary
lengthening of the gear case.
According to my invention I make of metal, papier maiché or other suitable
substance a circular chamber hinged on the vertical diameter at each end of my
device and in size according to the requirements of the machine. On each of
these circular chambers I provide two tubes preferably of rectangular shape and
so arranged that the extremity of each tube on one of the chambers before
mentioned slides into the extremity of each tube on the other chamber :-the
sliding of the extremities of the tubes one over the other allows the gear case to
accomodate itself in length to the extent rendered necessary when tightening the
chain.
I provide also at the extremity of each tube on one of the chambers before
mentioned a hinged dropping door and latch for the double purpose, of fastening
rigidly together, and of examining the chain.
Centrally in both circular chambers I adapt washers of leather, wood, fibre, or
other substance making a dust proof joint over the spindles or axles of the
machine.
This gear case may be fastened in position on the machine by any of the well
known methods used with such articles.
Dated this 21st day of December 1895.
COMPLETE SPECIFICATION.
Improvements in Gear Cases for Cycles and the like Machines.
I EDMUND POWELL of 37 Wellingborough Road Northampton 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 the thorough protection from dust dirt and other
substances the gearing of cycles and the like machines whether driven by manual
foot or other power.
The making the gear case to cover the wheels and chain only and not the
intervening space between the chain in order to lessen if not intirely to obviate
the side wind pressure.

page_text: The means whereby a simple gear case can be produced and one which will
admit of quickly tightening the chain without the necessity of removing the case
and in addition as is hereinafter explained permits of the necessary lengthening of
the gear case.
In order that my invention may be clearly rendered reference may be had to
the accompanying sheet of drawings in which'
Fig. 1 is an elevation of the gear case.
Fig. 2 a plan looking upwards showing underplate attachments or doors and
method of fastening same.
Figs. 3. 4 end views with circular chambers opened.
Fig. 5 shows a portion of an ordinary cycle with gear wheel and case in position
the method I prefer as rendering the gear case more dust proof.
Fig. 6 shows the two halves of the gear case at point in Fig. 1 which
constitutes the telescopic action before being put together also the packing.
In constructing a gear case according to my invention I make of metal papier
maché or any other suitable material circular chambers a and b Fig. hinged at
the vertical diameter in size according to the requirements of the machine on each
of these chambers I attach two tubes preferably of rectangular section c d and ef
Fig. 1 so arranged that the extremities of the two tubes attached to one circular
chamber fit into the two tubes attached to the other constituting when adjusted in
position by the underplate attachments or doors g and h and fastened by the slide
bolts ja telescopic action enabling the gear case to be adjusted to the length
of the chain. Washers or packing of any suitable material of which I prefer
leather is applied as at points marked k Figs. 3. 4 and 6 thus making dust proof
joints.
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
First. In a gear case the thorough protection from dust dirt and other
substances by means of the application of some flexible substance applied at
various parts.
Secondly. In a gear case the making of the gear case to cover the wheels and
chain only and not the intervening space between the chain to lessen if not intirely
to obviate the side wind pressure.
Thirdly. The means by which a simple gear case can be produced and one which
admits of quickly tightening the chain or otherwise adjusting the chain without the
necessity of removing either chain or case substantially as herein described with
reference to the appended sheet of drawings.
Dated this 21st day of September 1896.
EDMUND POWELL,
Applicant.