Improvements in or in connection with Chains for Chain Gearing.
Year: 1897

page_text: Date of Application, 18th Oct., 1897
Complete Specification Left, 15th July, 1898-Accepted, 20th Aug., 1898
PROVISIONAL SPECIFICATION.
Improvements in or in connection with Chains for Chain Gearing.
I, THOMAS HEWETT, of No. 6, Jeffrey's Square, St. Mary Axe, in the City of
London, Mechanical Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to the means of connecting together the ends, or parts,
of the chains employed in chain gearing, especially such as is employed for
driving the wheels of bicycles and other vehicles.
According to the present invention the locking stud, roller, or pin to fasten
together adjacent links of a gear chain is passed through the said links of the
ends of the chain to be joined and is then locked into position by means of a
leaf, plate or spring piece which is centred on the side face of the outer link or
on the side faces of the outer link if two locking springs should be used-one for
each end of the locking bolt.
The links or plates of the chain to be connected are correctly placed relatively,
the short stud (which may have the end first inserted of a smaller diameter,
leaving thereby a smaller hole to be provided in the link it engages and a small
shoulder to determine the extent of its insertion) is pushed into position, and the
spring or plate is turned over the entrant hole locking the bolt therein.
A slight projection on the inner face of the spring plate may be sprung into
a small depression on the outer end of the lock-stud thereby serving to restrain
any disengaging movement of the spring plate, or the arrangement can be
transposed.
A convenient form and mounting of the spring plates is to centre them on
the studs passed through the link plates of the chain between the positions of the
bolts or studs that join adjacent sets of links and to make these plates that box
in the locking studs of spring steel of the same shape as the chain links against
which they lie and on these central studs to mount the anti friction rolls which
take off the frictional strain of the chain from the wheel when such are used or
these plates may be simply centred suitably to the sides of the links.
Dad the 10th day of October 1897
WM. BROOKES & SON,
55 and 56, Chancery Lane, London,
Agents for the Applicant.
Improvements in or in connection with Chains for Chain Gearing.
I, THOMAS HEWETT, of No. 6, Jeffrey's Square, St. Mary Axe, in the City of
London, Mechanical Engineer, do hereby declare the nature of this invention
Den 877

page_text: and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
This invention relates to the means of connecting together the ends, or parts,
of the chains employed in chain gearing, especially such as is employed for
driving the wheels of bicycles and other vehicles.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 shews a side view and Fig. 2 an edge view of a piece of chain with
my invention applied.
Fig. 3 shews one of the locking studs, or pins separately to a larger scale.
Fig. 4 shews a side view of an end of chain with the spring piece in position
for removal of the locking stud.
Fig. 5 shews by side view and Fig. 6 by sectional edge view, to a larger scale,
said spring plate separately.
Fig. 7 shows the parts of the connection to a larger scale.
h is the locking stud, or pin to fasten together adjacent links of a gear chain.
This stud his passed through the end links as b, b₁ of the chain to be joined
and this stud h is then locked into position by means of a leaf, plate or spring
piece which is centred as at on the side face f of the outer link for ou
both the side faces of the outer links if two locking springs should be used one
for each end of the locking bolt.
The links or plates f and f¹ of the chain to be connected are correctly placed
relatively, the short stud h (which may have the end first inserted of a smaller
diameter leaving thereby a smaller hole to be provided in the link it engages
and a small shoulder to determine the extent of its insertion) is pushed into
position and the spring or plate i is turned over the entrant hole locking the bolt
therein. A slight projection on the inner face of the spring plate i is (as
shown) sprung into a small depression 2 on the outer end of the lock stud h
thereby serving to restrain any disengaging movement of the spring plate, or
the arrangement can be transposed.
A convenient form and mounting of the spring plates is to centre them as
shown on the studs 3 passed through the link plates f and f¹ of the chain
between the positions of the bolts or studs that join adjacent sets of links and
to make these plates i that box-in, the locking studs h of spring steel of the
same shape as the chain links f, f' against which they lie and on these central
studs f to mount the anti friction rolls which take off the frictional strain
of the chain from the wheel when such are used, or these plates may be simply
centred suitably to the sides of the links.
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:
The construction and use of the means of connection of links of chains used in
chain gearing as hereinbefore set forth.
1
71
T T
WM. BROOKES & SON,
55 and 56, Chancery Lane, London, Agents for the Applicant.