Improvements in and in connection with Chain Wheels for Bicycles, and also in Chain Wheels in general.
Year: 1896

page_text: Date of Application, 10th June, 1896
Complete Specification Left, 8th Mar., 1897-Accepted, 5th June, 1897
PROVISIONAL SPECIFICATION.
Improvements in and in connection with Chain Wheels for Bicycles,
and also in Chain Wheels in general.
We EDWIN HODGSON of Number 4 Worsley Grove Stockport Road,
Levenshulme in the Parish of Manchester in the County of Lancaster Mercantile
Clerk and EDWIN HODGSON (nephew of the above named Edwin Hodgson) of
Number 6 New Street, Miles Platting in the Parish of Manchester aforesaid
Mechanic do hereby declare the nature of this invention to be as follows:-
This invention consists of small steel rollers which are let into slots made in the
tops of the teeth of chain wheels.
The method of fitting these steel rollers to the teeth is as follows:-
1st. A hole is bored through the tooth from side to side.
2ndly. A slot is made in the top of the tooth sufficient in depth and width to
admit of the dropping therein of a steel roller through which roller a hole has
been previously bored and
3rdly. A pin is passed through both the hole made through the wheel from side
to side and also through the steel roller aforesaid and then each end of the said
pin is rivetted up.
By means of these steel rollers the chains are made to glide smoothly over the
tops and then down the sides of the teeth thus saving the drag put upon the chains
in passing over the teeth of chain wheels. There will be less friction on both the
teeth of the chain wheels and on the chains and the speed will be greatly increased
In addition to the increase in speed cyclists will have to use less exertion when
riding their machines.
Dated this Eighth day of June One thousand eight hundred and ninety-six.
Improvements in and in connection with Chain Wheels for Bicycles,
and also in Chain Wheels in general.
We EDWIN HODGSON of Number 4 Worsley Grove Stockport Road,
Levenshulme in the Parish of Manchester in the County of Lancaster Mercantile
Clerk and EDWIN HODGSON (nephew of the above named Edwin Hodgson) of
Number 6 New Street, Miles Platting in the Parish of Manchester aforesaid
Mechanic, 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 as will be seen by reference to Figs. 1 and 2 (front elevation
and half section respectively of chain wheel) of the accompanying drawing

page_text: "consists of small steel rollers A which are let into slots B made in the tops
of the teeth C of chain wheels D for bicycles and also in the top of
the teetli of chain wheels in general the said small steel rollers A revolving on
steel pins E passing through holes previously bored through the entire length of
the teeth of the aforesaid chain wheels for the purpose.
The method of fitting these small steel rollers A to the teeth C of the chain
wheels aforesaid is as follows:-
1st. A hole is bored through the entire length of the tooth C of the chain
"wheel D.
2ndly. A slot B is made in the top of the tooth C of the chain wheel aforesaid
sufficient in depth and in width to admit of the dropping therein of a small steel
roller A through which small steel roller A a hole has been previously bored and
3rdly. A steel pin E is passed through the holes bored through the entire length
of the tooth C of the chain wheel D and through the small steel roller A
respectively and then the ends of the said steel pin E are rivetted up to the
outsides of the tooth C of the chain wheel D.
Should any of the small steel rollers A become detached from the steel pins E
on which they revolve the driving power of the chain and chain wheel D will still
be intact and in case one or more of the small steel rollers A or steel pins E is or
-are worn it or they can very easily be replaced by new ones.
By means of these small steel rollers A the chains are made to roll smoothly
-over the acting parts of the teeth C of chain wheels D thus saving the drag put
upon the chains and chain wheels D during the process of driving. In fact the
friction on the said acting parts of both chains and chain wheels D is by our
invention reduced to a minimum whilst the speed obtained is greatly increased. In
the case of cyclists the improvements above mentioned will be an enormous gain.
Besides the foregoing advantages our invention will effect a great saving in the
wear of both chains and chain wheels.
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 :-
In attaching to the teeth of chain wheels for bicycles and also to the teeth of
chain wheels in general small steel rollers which small steel rollers revolve ou
steel pins passing through the entire length of the teeth of chain wheels and then
rivetted up to the outsides of the teeth of the chain wheels aforesaid.
Dated this Eighth day of March 1907
EDWIN HODGSON.
EDWIN HODGSON.