Year: 1895

page_text: I, MICHAEL MOYLE of 124 East India Dock Road, Poplar in the County of
Middlesex, Cycle Agent, do hereby declare the nature of this invention to be as
follows:-
This invention relates to gear cases for cycles, particularly what are known as
safety bicycles and combines some of the advantageous features of two forms of
gear case at present in use. One of these is a complete case soldered or otherwise
secured to the frame of the bicycle and completely embracing the two chain wheels,
the chain and portions of the framework; the other form has an open space in the
centre between the upper and lower portions of the chain, each portion of the
Both of these forms
chain being encompassed in the tube-like portion of the case.
of case are permanently secured to the frame and are not detachable. Other forms
of case are what are called detachable and are for the most part made in two
portions, the case being divided longitudinally.
In carrying out my invention I make the outer wall of the case in a single piece
with an excrescence to pass around the chain stay of the machine and I divide the
inner wall or that nearest the machine so as to form in effect two tubes one for the
top and one for the bottom portion of the chain so that the chain stay of the frame
does not pass inside the case proper at all but lies in a recess provided for it. In
other respects this gear case is very similar in appearance to the old fixed gear case
but it is secured by one clip passing round the chain stay of the frame and secured
by any convenient means say by a bolt and nut. That portion of the inner wall
of the case which abuts against the crank axle bracket is preferably provided with
a flange to fit round the bracket so as to assist in fixing the case while at the other
end, where the back wheel is provide the inner wall of the case with preferably
two slides which when closed sufficiently closely surround the axle to prevent the
escape of oil and when open allow free passage for the chain wheel through the
wall of the case.
1 also prefer to provide a small sliding piece of tiu or other
suitable material lying in an approximately vertical plane transverse to the length
of the machine and adapted to fit against the chain stay of the frame so as to
As a convenient means of
prevent an escape of oil from the back chain wheel.
giving access to the interior of the case 1 prefer to make the upper portion of the
back wheel end of the case removable and at the front to provide the outer wall
of the case with a flanged disc of about the size of the large chain wheel.
One or more oil cups may be provided in the top of the case to allow of oiling
the chain.
1007
BOULT & WADE,
Agents for the Applicant.

page_text: I, MICHAEL MOYLE of 124 East India Dock Road, Poplar, in the County of
Middlesex, Cycle Agent, do hereby declare the nature of this invention, and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
This invention relates to gear cases for cycles, particularly for what are known
as safety bicycles, and combines some of the advantageous features of two forms
of gear case at present in use. One of these is a complete case soldered or
otherwise secured to the frame of the bicycle and completely embracing the two
chain wheels, the chain and portions of the framework; the other form has an
open space in the centre between the upper and lower portions of the chain, each
portion of the chain being encompassed in the tube-like portion of the case.
of these forms of case are permanently secured to the frame and are not detachable.
Other forms of case are what are called detachable and are for the most part made
in two portions, the case being divided longitudinally.
Both
One construction of improved gear case according to my invention is illustrated
in the accompanying drawings, wherein
Fig. 1 is a perspective elevation thereof as seen from that side of it which is
intended to be farthest from the cycle.
Fig. 2 is a sectional plan on the line 2, 2, of Fig. 1.
Fig. 3 is a transverse section on the line 3, 3, of Fig. 1.
Fig. 4 is a view similar to Fig. 1, of the gear case as seen from the side opposite
to that from which it is viewed in Fig. 1, and
Fig. 5 is a perspective view of the adjacent end of Fig. 4, with its parts
separated and broken away to enable their arrangement and construction to be
clearly seen.
A is the outer wall of the case. B is the inner wall of the case. B' is a strip
of metal, of U section, which fills a slot in the wall B and is extended into the
interior of the gear case at a small inclination from the flat part of the wall B and
through the wall A; in both of the walls it fits closely. The part B' forms a
passage-way, and is open along one side being provided in order to receive the
chain-stay which therefore is never within the case proper at all.
The part B' further serves in the present instance as a partition which so
divides the gear case as in effect to form two tubes, one C, above the partition for the
top portion of the chain, and the other, D below the partition for the bottom
portion of the chain.
In other respects this gear case is very similar in appearance to the old fixed
gear case.
It is secured by means of a clip E fixed to it and adapted to engage the frame
of the cycle and to be kept in place thereon by any convenient means such as the
bolt E'; but I may employ a spring clip or any other equivalent device instead of
the clip E and bolt E'; additional security afforded by the oil-guard F (Fig. 5)
the main object of which, however is to prevent the issue of oil from the rear
chain-wheel or the access of dirt thereto. The plate F fits tightly in guides G
formed by channelled strips fixed in the gear case just above slots G¹ therein, into
which the plate is forced after the gear-case has been placed over the chain-stay,
and whence it may be withdrawn if the case is to be removed.
That portion of the inner wall B of the case which abuts against the crank-axle
bracket is recessed inward at B6 to receive the latter, in order that the width of
tread of the machine may be minimised and is preferably provided with a flange B 2
to fit round the bracket so as to assist in fixing the case in proper position. The
recessing of the wall B also enables the depth of the flange B2 to be increased

page_text: At the other end, where the back wheel is to be, the inner wall of the case has
two slides H which move in guides B3 of well-understood construction and, when
closed sufficiently, closely surround the axle to prevent the escape of oil and when
open allow free passage for the rear chain-wheel through the opening in the wall
of the case provided at B4 between the guides B 3. Moreover, one of them will
keep the guard F in place, should it tend to move out accidentally.
As a convenient means of giving access to the interior of the case I prefer to
make the upper portion I of the rear end of the case removable; in the present
example it grips when in place, the exterior faces of projections B5 which extend
from the interior of the case at the line of division between the latter and the
portion I; further the portion I has a projection I¹ from its interior so that it
engages with the underside of the upper one of the projections B5 and thus is
further aided to keep in place.
To enable access to be obtained to the front end of the case it is there provided
with an opening J in which fits a flanged disc J' of about the size of the front
chain-wheel; in the disc are guides J 2 for slides J 3 which latter are adjustable
to fit close up to the crank-axle.
One or more oil cups may be provided in the case, to supply oil to the chain or
to chain wheels.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is ;-
1. In a gear-case for cycles a channel or partition such as B' substantially as and
for the purpose described.
2. In a gear-case for cycles a flange such as B2 substantially as and for the
purpose described.
3. In a gear-case for cycles a recess such as B6 substantially as and for the
purpose described.
4. In a gear-case for cycles a clip such as E substantially as and for the purpose
described.
5. In a gear-case the combination of flange such as B2 recess B6 and clip such
as E substantially as and for the purpose described.
6. In a gear-case for cycles the combination of channel such as B¹ and removable
guard F substantially as and for the purpose described.
7. In a gear-case the combination of channel or partition B¹ flange such as B2
and clip such as E substantially as and for the purpose described.
8. In a gear-case such as described the provision of a removable guard such
as F substantially as and for the purpose described.
9. The combination and arrangement of parts constituting the complete gear-
case substantially as and for the purpose described.
Deted this 10th dow of October 1805
MICHAEL MOYLE.
Boult & Wade,
Agents for the Applicant.