Improvements in Driving Chains.
Year: 1898

page_text: Date of Application, 3rd June, 1898
Complete Specification Left, 30th Sept., 1898-Accepted, 10th Dec.,
1898
PROVISIONAL SPECIFICATION.
Improvements in Driving Chains.
I, CHARLES EDWARD TOMLINSON, of 111, Garfield Avenue, in the City of
Syracuse, County of Onondaga, and State of New York, United States of
America, Draughtsman, do hereby declare the nature of this invention to be as
follows:
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My invention has for its object an improvement in driving chains, more
especially applicable to the type of chain now generally in use for velocipedes,
whereby the pin uniting the two end links of the chain shall be less liable to
become accidentally loosened than when only secured by the means usually em-
ployed at the present time, and accidents due to the parting of the chain from
this cause consequently shall be less liable to occur.
According to my invention I unite the two end links of the chain by means
of a screw pin according to the well known method, but I now attach to the head
of this pin and preferably at right angles thereto one end of an arm of spring
metal or other suitable material. This arm consists of a plate preferably corre-
sponding in size and shape to one of the outside links of the chain, and has a
recess or its equivalent formed in its free end.
When the two end links of the chain are united and the said pin is screwed
up, the arm assumes a position in close contact with the outside of the outer end
link of the chain, at one side thereof; the free end of the arm being sprung
over the projecting head of the rivet at the opposite end of this link, the head of
this rivet then resting in the before mentioned recess in the arm.
The screw pin uniting the ends of the chain is now practically locked in
position and cannot be accidentally loosened.
The usual screw nut employed at the end of the screw pin can be omitted.
It will also be found that no screw driver or wrench is required, the arm acting
as a lever to turn the screw pin.
T2nd day of Iun 1908
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.
Improvements in Driving Chains.
I, CHARLES EDWARD TOMLINSON, of 111, Garfield Avenue, in the City of
Syracuse, County of Onondaga, and State of New York, United States of
America, Draughtsman, do hereby declare the nature of this invention and in
Pine 8d7

page_text: to the end of the pin as seen at Figure 10 is turned round sufficiently for the
notches ps p to clip the plate L as seen at Figure 12 when the arm is locked and
the joint secured.
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:
-
CLAIMS.
First The improvements in driving chains consisting of an extending arm
or lever secured to the link pin for setting and locking the bolt or pin in place
substantially as herein set forth and shewn.
Second: In driving chains and in combination therewith the extending arim
or lever secured to the pin or bolt as and for the purpose herein set forth and
shewn.
Third: For securing together the ends of cycle chains the combination of a
bolt screw-threaded or notched at one end with a spring arm or lever secured to
and a part of the bolt or pin at the other end substantially as set forth and shewn.
Fourth: For use with a cycle chain, a fastening device for the ends consisting
of a bolt threaded or notched at one end and having secured thereto at the other
end a flattened spring arm.
Fifth A fastening device for cycle chains composed of a bolt screw-threaded
or notched at one end, and a spring arm secured to the other end of the bolt, the
said arm having a depression or projection or projections to engage with the
chain substantially as herein set forth and as shewn.
Sixth-A fastening device for cycle chains consisting of a bolt or pin threaded
at one end and rigid therewith and projecting from the other end a thin metallic
spring plate arranged at right angles to the bolt and in plane parallel to the side
plate, and provided at its free end or other portion with a hollow or projection or
projections to engage with the rivet head or with a hole in the link or to embrace
the link when sprung into position against the adjacent side plate of the chain.
Dated this 29th day of September 1898.
CHARLES EDWARD TOMLINSON,
By George Barker,
Fellow of The Chartered Institute of Patent Agents,
Agent for Applicant, 77, Colmore Row, Birmingham.