Wisdom teeth?

In article ,
wrote:

On Sat, 1 Nov 2008 19:44:39 -0700 (PDT), pm
wrote:

On Nov 1, 7:15*pm, Brian Huntley wrote:
On Nov 1, 8:43*pm, wrote:

Ignore the fork-hung crank in the no-down-tube frame:

http://www.auctionflex.com/showlot.a...4596&weventite...
orhttp://tinyurl.com/66s4gy

Page down to the bottom and see weird half-inch teeth engaging the
inch-pitch chain on the rear.

The front sprocket has normal inch-pitch teeth, so I wonder what the
explanation was?

I've never seen a good reason for the 'skip tooth' inch-pitch chain
and sprockets in the first place, Carl. Perhaps you have a link to
one.

The outboard bearings on the bb are interesting. A combination of
spindly-looking and functional seeming, assuming they'd protect them
somehow.

I wonder if they were meant to adapt crank/hub bearings made for
highwheelers. They look similar to bearings you find today on
unicycles.

-pm

Dear Pm,

For what it's worth, many companies cobbled their early safeties
together with parts borrowed directly from their tricycles, which were
where chains and sprockets had been developing all along.

Sharp's title reminds us that tricycles were immensely more popular
back then.

Built by the Sharp's rifle manufacturer?

--
Michael Press