An Improved Chain with Interchangeable Parts for Cycles and other Machines.
Year: 1896

page_text: Date of Application, 21st Sept., 1896
Complete Specification Left, 21st June, 1897-Accepted, 4th Sept., 1897
PROVISIONAL SPECIFICATION.
An Improved Chain with Interchangeable Parts for Cycles and
other Machines.
JOHN ALBERT REYNOLDS & ROBERT DEMPSEY REYNOLDS both of 24 Queen Street
Belfast Ireland Surgical Instrument Makers, do hereby declare the nature of this
invention to be as follows:--
An improvement in cycle and other chains whereby they are rendered detachable
and capable of being readily and easily lengthened or shortened or of having the
broken parts replaced in the case of breakage without the aid of a mechanic
or tools.
It is applicable to both the block and roller chains,
The improvement consists in substituting for the rivet or rivet and bush now
employed a stud or pin having at one end a head and at the other a groove or shoulder
and groove.
The stud or pin is held in position by a thin steel plate having a slot at each end.
When the stud or pins have been placed in position this steel plate is placed so that
the slots at its ends enter the grooves at the ends of the pins and so prevent their
withdrawal.
The possibility of the plate itself becoming detached while the chain is running is
obviated by an indentation in the plate corresponding with a hole in the side plate
of chain this hole may be that usually found in the side plates already in use or may
be one specially made.
JOHN ALBERT REYNOLDS.
ROBERT DEMPSEY REYNOLDS.
COMPLETE
ION.
An Improved Chain with Interchangeable Parts for Cycles and
other Machines.
We JOHN ALBERT REYNOLDS, and ROBERT DEMPSEY REYNOLDS, of 24 Queen Street,
Belfast Surgical Instrument Makers 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 :-
An improvement in cycle and other chains whereby they are rendered detachable
and capable of being readily and easily lengthened or shortened or of having

page_text: the broken parts replaced in the case of breakage without the aid of a mechanic
or tools.
It is applicable to both the block and roller chains.
The improvement consists in substituting for the rivet now employed a stud or
bolt or pin A. A. A. having at one end a head and at the other end a circular groove G,
or instead of a circular groove a cut may be made on one or both sides of the
stud so as to prevent the stud turning should this be thought desirable.
This stud or bolt or pin is held in position by a thin plate of steel P having a slot
at each end (these slots may be substituted one or both either lengthwise or crosswise
in the plate).
When the stud or bolt or pin has been placed in position this steel plate P
is placed so that the slots at its ends sourround and enter the grooves G at the ends of
the studs A and so prevent their withdrawal.
The possibility of the plate P itself becoming detached while the chain is
running is obviated by an indentation I in the plate corresponding with a hole in the
side plate of chain this hole inay be that usually found in the side plates already in
use or may be one specially made.
In applying this stud or bolt or pin the shoulder shown in A Fig. 2 may be used if
it be considered advisable to prevent the side plates pressing against the blocks if
this be not considered necessary the stud may be made as Fig. 3.
As this stud does not need to be rivetted over it may be made of good quality steel
and hard enough of itself to do away with the necessity for the bush cf hard steel
at present used.
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
1. A new method of securing the pins in bicycle and other chains for transmission
of power without rivetting or screwing.
2. A method of rendering the parts of such chains readily detachable and inter-
changeable so as to make them repairable without the aid of skilled labour.
3. A means of obviating the necessity for a hard steel bush round said pin as the
pin not requiring riveting can be itself made hard.
Dated this 19th day of June 1897.
JOHN ALBERT REYNOLDS,
ROBERT DEMPSEY REYNOLDS,
Applicants.