Thanks Matt:

That makes sense.  It must be that the ratchet engages against the 
direction most likely to slip.

I appreciate your time.

Jay

On Saturday, September 22, 2012 6:12:38 AM UTC-4, Matt Beebe wrote:
>
> P.S.  In other words, the toothed cog is frictioned by the tightness of 
> the mount screw, whereas the lever body is free-floating, and hence easy to 
> move, but only in one direction-  when the pawl is not engaged/pushing the 
> cog.
>
>
>
> On Saturday, September 22, 2012 6:08:57 AM UTC-4, Matt Beebe wrote:
>>
>> I've had mine apart when one of them failed after many miles.    They 
>> ratchet in one direction, using a spring and pawl on a toothed 'cog', and 
>> slide with friction in the other direction, like a normal friction shifter 
>> (whereas a ratcheting wrench does not slide).        On my old silvers that 
>> had worn out, it turned out the pawl, which is tiny, had worn to the point 
>> of not being able to grab the teeth anymore.     
>>
>> I love these shifters though, and use them on the downtube usually, 
>> except on my mountain bike.
>>
>>
>>
>> On Friday, September 21, 2012 9:39:30 PM UTC-4, Jay LePree wrote:
>>>
>>> I use ratchet wrenches, and they all have a button to press or depress 
>>> to change the direction of the ratchet to allow movement in one direction 
>>> and allow grip or non-movement in another.  The Silvers do not move under 
>>> hard pedaling (like traditional friction shifters) which is their benefit, 
>>> but allow easy gear changes in either direction.  I want to take one apart, 
>>> but don't want to destroy it.  Can some one explain or send a diagram?  Off 
>>> list replies are fine.
>>>
>>> The shifters are truly magical.
>>>
>>> Best,
>>>
>>> Jay
>>> Demarest, NJ
>>>
>>

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