D
DirtRoadie
Guest
On Jan 26, 6:52 pm, [email protected] wrote:
> Decades of land-speed record seekers used big chain rings because they
> didn't know that double-reduction high-speed gearing had been patented
> (repeatedly) before the turn of the century. If they'd had the Google
> patent search, they might have saved some money instead of buying
> manhole-covers with teeth.
>
> Application filed 1891:
> http://www.google.com/patents?id=VGw_AAAAEBAJ&pg=PP1&dq=472796#PPP1,M1
Working the other direction, this more modern application
beneficially incorporates the concept to accomplish somewhat different
purposes:
http://www.google.com/patents?vid=USPAT5810379
DR
> Decades of land-speed record seekers used big chain rings because they
> didn't know that double-reduction high-speed gearing had been patented
> (repeatedly) before the turn of the century. If they'd had the Google
> patent search, they might have saved some money instead of buying
> manhole-covers with teeth.
>
> Application filed 1891:
> http://www.google.com/patents?id=VGw_AAAAEBAJ&pg=PP1&dq=472796#PPP1,M1
Working the other direction, this more modern application
beneficially incorporates the concept to accomplish somewhat different
purposes:
http://www.google.com/patents?vid=USPAT5810379
DR