Improvement in the Construction of Gear Cases for Bicycles, Tricycles, and Velocipedes.
Year: 1897

page_text: Date of Application, 21st Aug., 1897
Complete Specification Left, 23rd May, 1898-Accepted, 13th Aug., 1898
Improvement in the Construction of Gear Cases for Bicycles,
Tricycles, and Velocipedes.
LOUIS ERNEST MOHR, 315, Bolton Road, Small Heath, Birmingham, Metal
Worker, do hereby declare the nature of this invention to be as follows:-
-:
The object of this invention is to make a case which only covers the two gear
wheels and chain and in no way covers any part of the frame of the bicycle or
tricycle.
In order to do this I construct two round boxes with flat sides, each box being
in two halves, each half forming a semi-circle, the said halves being connected
by means of a hinge.
These round boxes fit over the gear wheels. I connect these two boxes by
means of two tubes which completely cover the chain between the gear wheels.
These tubes are soldered on to holes cut in the rim of one of the boxes (the
box covering the large gear wheel by preference) where the chain leaves the
gear wheel.
Holes are cut in the rim of the small box where the chain leaves the gear wheel
and on these I solder short tubes.
So that the small box may pass the chain I cut a slot through the rim and
through the short tubes, the slot being afterwards closed with a slide fitting in
grooves in the sides of the box.
As an outlet for any waste lubricating matter I cut a hole in the bottom of
the case, the said hole being covered by a slide.
To adjust the case I detach the chain, thread it through the tubes on the large
box, place it in position over the gear wheels (Fig. I) and fasten the connecting
link of the chain.
I then take the small box, close it over the small gear wheel (Fig. II) and fix
the slide in the slot.
Dated this 20th day of August 1897.
Improvement in the Construction of Gear Cases for Bicycles,
Tricycles, and Velocipedes.
LOUIS ERNEST MOHR, 315, Bolton Road, Small Heath, Birmingham, Metal
Worker, do hereby declare the nature of this invention and in what manner the

page_text: same is to be performed, to be particularly described and ascertained in and by
the following statement:-
-
The object of this invention is to make a case which only covers the two gear
wheels and chain, and in no way covers any part of the frame of the bicycle or
tricycle, and also to make a case which is practically dust-proof.
In order to do this I construct two round boxes with flat sides, each box being
in two halves, each half forming a semi-circle, said halves being connected by
means of a hinge. These round boxes fit over the gear wheels.
I connect these two boxes by means of two tubes which completely cover the
chain between the gear wheels. These tubes are permanently fixed on to holes
cut in the rim of one of the boxes (the box covering the large gear wheel by
preference) where the chain leaves the gear wheel.
Holes are cut in the rim of the small box where the chain leaves the gear wheel,
and on these I fix short tubes.
So that the small box may pass the chain I cut a slot through the rim and
through the short tubes, the slot being afterwards closed with a slide fitting in
grooves in the sides of the box.
As an outlet for any excess of lubricating matter I cut a hole in the bottom
of the case, said hole being covered by a slide. To adjust the case I detach the
chain, thread it through the tubes (Fig. A1 and A2) on the large box (Fig. B1
and B2), place it in position over the gear wheels (Fig. 1 drawing left with the
Provisional Specification) and fasten the connecting link of the chain.
I then take the small box (Letter C), close it over the small gear wheel (Fig. 2
drawing left with the Provisional Specification) and fix the slide (letter 1) drawing
left with the Provisional Specification) in the slot (letter G drawing left with the
Provisional Specification).
It has been found more convenient to hinge the small box (letter C) at such
an angle as to allow the top tube on the large box (Fig. A 1) to rest on the bottom
half of the small box (letter C) when the case is closed (at the points marked
letter E, drawing left with the Complete Specification) and sliding the bottom
tube on the small box (letter F) over the bottom tube on the large box (Fig. A 2),
thus allowing the chain to be threaded through the tubes on the large box and
through the bottom half of the small box (drawing left with the Complete
Specification).
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
Constructing a gear case for bicycles, tricycles, and velocipedes of two round
boxes with flat sides, each box being halved and connected by means of a hinge,
and two tubes completely covering the chain, between the gear wheels, the tubes
being permanently fixed on to one of the boxes (the box covering the large gear
wheel by preference), the said box being hinged in such a manner as to allow
the chain being slid through both tubes and box when the case is open.
Dated this 19th day of May 1898