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Posted by Larry Jaques on May 3, 2008, 9:58 am
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On Fri, 02 May 2008 23:57:35 -0500, with neither quill nor qualm, Jon
>Jim Stewart wrote:
>> spamTHISbrp@yahoo.com wrote:
>>
>>> I figured since this uses a ball-bearing to generate sine waves
>>> (mechanisms like that have been seen here now and then), this would
>>> have some interest:
>>>
>>> http://www.tatjavanvark.nl/harmonium/
>>
>>
>> It has some resemblance to the guidance
>> computer in an old Pershing I missile.
>>
>Umm, yeah! She's built one of those, too. See "Inertial
>Navigator Platform", and check out the video of her picking up
>the stable platform and moving it around while it is running.
>Extremely cool!
The harmonium is a beautiful and impressive piece of work. But I
wonder how many unnecessary gears and shafts there are in there. I say
that after noticing that the cone gear train is all the same tooth
size/pitch, so all rows of teeth engage simultaneously. Hmmm...
http://www.tatjavanvark.nl/tvva/harm3_12_s.jpg
--
Those who flee temptation generally leave a forwarding address.
-- Lane Olinghouse
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Posted by Ned Simmons on May 3, 2008, 11:31 am
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On Sat, 03 May 2008 06:58:34 -0700, Larry Jaques
>
>The harmonium is a beautiful and impressive piece of work. But I
>wonder how many unnecessary gears and shafts there are in there. I say
>that after noticing that the cone gear train is all the same tooth
>size/pitch, so all rows of teeth engage simultaneously. Hmmm...
>http://www.tatjavanvark.nl/tvva/harm3_12_s.jpg
There must be some sort of clutch to select which pair of gears is
active, otherwise the shafts would be locked. You can't have both a
1:2 and 2:1 ratio, for example, between two shafts simultaneously.
--
Ned Simmons
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Posted by Larry Jaques on May 3, 2008, 11:41 pm
Please log in for more thread options On Sat, 03 May 2008 11:31:23 -0400, with neither quill nor qualm, Ned
>On Sat, 03 May 2008 06:58:34 -0700, Larry Jaques
>
>
>>
>>The harmonium is a beautiful and impressive piece of work. But I
>>wonder how many unnecessary gears and shafts there are in there. I say
>>that after noticing that the cone gear train is all the same tooth
>>size/pitch, so all rows of teeth engage simultaneously. Hmmm...
>>http://www.tatjavanvark.nl/tvva/harm3_12_s.jpg
>
>There must be some sort of clutch to select which pair of gears is
>active, otherwise the shafts would be locked. You can't have both a
>1:2 and 2:1 ratio, for example, between two shafts simultaneously.
I _knew_ something kept bothering me about that thing but I didn't
spend the time to run it through the whole diagnostic. Thanks.
--
Those who flee temptation generally leave a forwarding address.
-- Lane Olinghouse
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Posted by William Noble on May 3, 2008, 11:51 am
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> The harmonium is a beautiful and impressive piece of work. But I
> wonder how many unnecessary gears and shafts there are in there. I say
> that after noticing that the cone gear train is all the same tooth
> size/pitch, so all rows of teeth engage simultaneously. Hmmm...
> http://www.tatjavanvark.nl/tvva/harm3_12_s.jpg
>
the gears MUST be free to rotate on one of the two shafts - think about it -
with all engaged, each with a different ratio, and with the gears locked to
the input shaft, each output gear will turn at a different speed. my guess
(and I can't confirm from photos) is that a clutch selects one of those
gears to lock to the output shaft
** Posted from http://www.teranews.com **
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Posted by Nick Mueller on May 3, 2008, 12:39 pm
Please log in for more thread options Larry Jaques wrote:
> But I
> wonder how many unnecessary gears and shafts there are in there. I say
> that after noticing that the cone gear train is all the same tooth
> size/pitch, so all rows of teeth engage simultaneously.
Now I know why you post only crap!
Nick
--
The lowcost-DRO:
<http://www.yadro.de>
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