Cycling Equipment · Public discussion

Re: Speed-record double-reduction jack-shafts

Started by DirtRoadie · · Last activity · 1 post · 545 views

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Cycling Equipment
Published
27 January 2008
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27 January 2008
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DirtRoadie
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  1. Quoted message said:

    Application filed 1898, a compact camel-back jack-shaft like Howard's:

    http://www.google.com/patents?id=zQt2AAAAEBAJ&pg=PA7&dq=641980#PPA7,M1

    Unbelievably, Warren W. Lower thought that, in addition to its
    high-speed advantages, his double-reduction jack-shaft ultra-high
    gearing would somehow make hill-climbing easier.

    A claimed echoed a few years later
    http://www.google.com/patents?id=5GNCAAAAEBAJ&dq=789580
    (No telling why this was granted a patent)

    Lines 9-20 of the specification read:
    "This invention relates to improved driving gear, and is more
    especially intended for cycles, to which it may be readily attached;
    and it consists in arranging a pair of multiplying sprockets of
    different diameters arranged at an angle to the power-sprochet and
    driving pinion, as hereinafter set forth. By this construction the
    cycle is evenly balanced and less liable to skid, while the advantage
    is obtained that higher gears can be used, even in hilly country, than
    heretofore without requiring any greater exertion on the part of the
    rider."

    Sold! I'll take two!
    DR

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