Improvements in Chain Gearing for Driving Cycles and Other Machines.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in Chain Gearing for Driving Cycles and Other
Machines.
I, HERBERT GODSAL of 13 Bruton Street, Berkeley Square London W. Barrister-
at-Law, do hereby declare the nature of this invention to be as follows:-
According to my invention I provide a collar piece round the hub of the driving
wheel; which collar piece fitting loosely on the said hub, is free to move round
independently of the same, and is provided on its outer surface with projections
or cogs.
The said collar piece is so much larger than the hub of the wheel that in the
arrangement of parts hereinafter described only those of the projections or studs
of the hereinafter described perforated discs which are actually acting or have
recently or are about to act to drive the hereinafter described cog wheels are
engaged with the said cog wheels, the other projections or studs being free from
the same.
At each end of this collar piece I fix rigidly to it a perforated disc, so that the
two perforated discs, which are of equal size are parallel and move with the
collar when the same is rotated. Attached to the peripheries of the two per-
forated parallel discs on the outer sides and at right angles to the same are
projections or studs.
Attached to the hub of the driving wheel rigidly are two cog wheels of equal
size so formed and placed, one on the outer side of each of the above mentioned
discs that some of the projections or studs of the said discs when the same are
rotated will engage with the said cog wheels, and rotate the same, and consequently
the driving wheel, to the hub of which they are rigidly attached.
The collar and perforated discs attached to it are rotated by an ordinary chain
passing round the toothed collar and the ordinary gear wheel, rotated by pedals
or other power.
Dated this 9th day of October 1896.
COMPLETE SPECIFICATION.
Improvements in Chain Gearing for Driving Cycles and other
Machines.
I, HERBERT GODSAL of 13 Bruton Street Berkeley Square London, W. Barrister-
at-Law, do hereby declare the nature of this invention and in what manner the
Price 811

page_text: same is to be performed, to be particularly described and ascertained in and by
the following statement:-
In order that my invention and the manner in which I perform the same may
be the more readily understood I have inserted the accompanying drawings, in
which:-
Figure I shews the side elevation of my gear and the chain passing around it.
Figure II is a horizontal section through the centre.
Figure III is a plan view looking straight down onto it.
Figure IV shews specially the sub collar when used.
Like letters indicate like parts in each of the figures.
According to my invention I provide a collar piece A. round the hub B of the
driving wheel which collar piece fitting loosely on the said hub is free to move
round independently of the same, and is provided on its outer surface with pro-
jections or cogs a 1, a 2. The said collar piece A is so much larger than the
hub B of the wheel that in the arrangements of parts hereinafter described only
those of the projections or studs s 1. s2
s 8. (of the hereinafter described
perforated discs D. D 1) which are actually acting as 1 $2 $3 or have recently
as s4, 35.; or are about to act as 7, 8, to drive the hereinafter mentioned cog
wheels E, E 1, are engaged with the said cog wheels, the other projections or studs
being quite free from the same.
At each end of this collar piece A. I fix rigidly to it a perforated disc D. and D1;
so that these two perforated discs D and D1 which are of equal size are parallel
and move with the collar A. when the same is rotated. Attached to the peripheries
of the two perforated discs D and D) 1, on the outer sides, and at right angles to
the same are projections or studs s 1 s 2
$ 8.
Attached to the hub 13 of the driving wheel rigidly are two cog wheels E, E 1,
of equal size, so formed and placed, one on the outer side of each of the above
mentioned discs D. D1, that some of the projections or studs sl s2
.
$ 8
of the said discs D, D1, when the same are rotated by the chain C. on the collar
cogs a 1, a 2, will engage on the said cog wheels E, E 1, and rotate the same,
and consequently the driving wheel to the hub B of which they are rigidly
attached.
The collar A and perforated discs D. D1, attached to it are rotated by an
ordinary chain C. passing around the collar A. with cog teeth a 1, a 2, and the
ordinary gear wheel (which is not shewn in the drawings) is rotated by pedals
or other power.
Sometimes I also provide an arrangement called a sub collar Fig. IV whereby
the friction of the chain upon the cog teeth a 1, a 2, etc. is reduced.
Accordingly I provide a collar piece or sub collar G. Fig. IV fitting loosely
around the hub B so as to be free to turn round it.
This sub collar G. is provided with projections or cog teeth 91, 92,
Over this sub collar G. I place the collar piece A formed as in Figs. 1, 2 and 3 except
that now the cog teeth a 1, a 2, etc. are abolished and perforations H. H. H. are
made through the collar (where the cog teeth a 1, a 2, etc. used to be) to admit of
the cog teeth g 1, 92,
on the sub collar G. piercing through these
perforations H. H. H. and being pulled round by the chain. In going round they
will obviously revolve the perforations H H H
they protrude and so revolve the collar A, which in its turn will revolve the hub B
through which
as in Figures I. II and III.
The collar A. being of substantially larger dimensions than the sub collar G. it
is evident that only those projections or cog teeth g 1, 92, etc. which are acting,
or have just done or are about to act will protrude through the perforations H H H
etc. of the collar A. and so when the projections or cog teeth g 1. g 2. etc.:
have done their work they are withdrawn from both the collar A. and also from
the chain.

page_text: Having now particularly described and ascertained the nature of my said In-
vention and in what manner the same is to be performed, I declare that what I
claim is:
(1) The combination of a collar piece, a pair of cog wheels attached to the
hub and chain all substantially as and for the purpose hereinbefore described.
(2) The combination of a collar piece, a sub collar, a pair of cog wheels and
chain all substantially as and for the purposes herein before described.
Dated the 3rd day of August 1897.
HERBERT GODSAL.