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<DIV>If you look closely at the spatial relationships between each shaft, the
counterbalanced crank (whatever the proper term), the link to the V shaped part
and the relevant leg of the V, you can see that at any position within a
rotation, the relationships for both shafts are identical. Thus they will
always rotate at exactly the same speed. The vertical movement of the V
shaped part is close to a sine wave. I have made no attempt to verify it
as exact. It probably varies somewhat in the way an IC engine piston
varies from a sine wave.</DIV>
<DIV> </DIV>
<DIV>An interesting note, there is no magic about the 90 degree angle. The
same thing can be done with the shafts at any angle as long as the V shaped part
has the 2 legs at the same angle. The shafts can be offset vertically as
well. You can even put the shafts at 180 degrees. In that case, it
becomes a reverser.</DIV>
<DIV> </DIV>
<DIV>Jim Becker</DIV>
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<DIV style="font-color: black"><B>From:</B> <A title=soffiler@gmail.com>Stephen
Offiler</A> </DIV>
<DIV><B>Sent:</B> Saturday, October 30, 2021 4:20 PM</DIV>
<DIV><B>To:</B> <A title=at@lists.antique-tractor.com>Antique Tractor Email
Discussion Group</A> </DIV>
<DIV><B>Subject:</B> Re: [AT] Saturday night amazement</DIV></DIV></DIV>
<DIV> </DIV></DIV>
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<DIV>Watching it again a few more times, I think you're right, Bob. It
does look smooth.</DIV>
<DIV> </DIV>
<DIV>SO<BR></DIV></DIV>
<DIV> </DIV>
<DIV class=gmail_quote>
<DIV class=gmail_attr dir=ltr>On Sat, Oct 30, 2021 at 2:14 PM
<A>rbrooks@hvc.rr.com</A> <<A>rbrooks@hvc.rr.com</A>> wrote:<BR></DIV>
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<DIV>Steve
<DIV> </DIV>
<DIV>The mechanism seems to run very smooth looking at the video. I would
think that to handle large amounts of torque the mechanism would have to get
large. Bevelled gears would be smaller and lighter IMHO</DIV>
<DIV> </DIV>
<DIV>Bob<BR><BR>
<DIV dir=ltr>Sent from my iPhone</DIV>
<DIV dir=ltr><BR>
<BLOCKQUOTE type="cite">On Oct 29, 2021, at 2:05 PM, Stephen Offiler <<A
target=_blank>soffiler@gmail.com</A>> wrote:<BR><BR></BLOCKQUOTE></DIV>
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<DIV dir=ltr>
<DIV dir=ltr>I'm wondering whether the output rotation precisely matches
input, or whether it's "lumpy" i.e. speeding up and slowing down at
different points in the travel of the mechanism. It seems like it
would be cheaper to manufacture than bevel gears, which suggests it would
have eventually prevailed in the market if it didn't have some flawed
characteristic.
<DIV> </DIV>
<DIV>SO</DIV>
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<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV></DIV></DIV>
<DIV> </DIV>
<DIV class=gmail_quote>
<DIV class=gmail_attr dir=ltr>On Fri, Oct 29, 2021 at 1:56 PM Ken Knierim
<<A target=_blank>ken.knierim@gmail.com</A>> wrote:<BR></DIV>
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<DIV>Good point, Tom. Seems a tough way to do it (unless a patent was
involved). Wouldn't it be easier to run the shaft a little longer on one
side (drive or driven, pick one) to put the bevel gear on the far side
rather than the near side to get that reversal? (hopefully that makes
sense). <BR></DIV>
<DIV> </DIV>
<DIV>I seem to recall Dad talking about guys making hayrakes from trucks
and flipping the axle over to reverse the drive direction so they had 4
reverse gears instead. <BR></DIV>
<DIV> </DIV>
<DIV>Ken in AZ<BR></DIV>
<DIV> </DIV></DIV>
<DIV> </DIV>
<DIV class=gmail_quote>
<DIV class=gmail_attr dir=ltr>On Fri, Oct 29, 2021 at 10:08 AM Tom Martin
<<A target=_blank>tmartin@xtra.co.nz</A>> wrote:<BR></DIV>
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<DIV>
<P>They were developed to keep shafts in same direction of
rotation...</P>
<P>Bevels gears reverse the secondary shaft.</P>
<P>Tom</P>
<BLOCKQUOTE type="cite">On 24 October 2021 at 14:12 Brad Loomis <<A
target=_blank>brad.loomis@gmail.com</A>> wrote: <BR><BR>
<DIV dir=ltr>For you belt guys, I found this thing mesmerizing.
<DIV><A
href="https://www.facebook.com/groups/56806961770/permalink/10158137279546771/"
target=_blank>https://www.facebook.com/groups/56806961770/permalink/10158137279546771/</A>
<BR></DIV>
<DIV>I never...</DIV>
<DIV>Brad</DIV></DIV>_______________________________________________
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