Tappet anti-rotation scheme
Tappet anti-rotation scheme
(OP)
I hope I'm not violating a forums rule by posting "just for fun"?
This ia an Iskenderian Cams ad from Mar '58. Although I usually enjoy puzzles, I'm at a loss to visualize "automatic, self-locking keys" that require merely "dropping the lifters into place".
These ads didn't run long- way less than a year, if I remember correctly, so I'm guessing the scheme wasn't flawless.
Umm... disregard above, until I figure out how to upload the image!
This ia an Iskenderian Cams ad from Mar '58. Although I usually enjoy puzzles, I'm at a loss to visualize "automatic, self-locking keys" that require merely "dropping the lifters into place".
These ads didn't run long- way less than a year, if I remember correctly, so I'm guessing the scheme wasn't flawless.
Umm... disregard above, until I figure out how to upload the image!





RE: Tappet anti-rotation scheme
RE: Tappet anti-rotation scheme
I had a very early set of Isky roller followers that had blades off the side of the follower that had a tongue and grove principle to stop rotation. I ran them for 20 odd years and sold them in a running engine, so they obviously worked. You would see them from a top view or a side view with correct orientation.
Regards
Pat
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RE: Tappet anti-rotation scheme
Since we're talking about roller followers, wouldn't a tiny bit of caster be adequate?
RE: Tappet anti-rotation scheme
Bill
RE: Tappet anti-rotation scheme
I can't see enough castor being possible to accommodate the shift in contact point as the cam profile strikes the roller as the cam rotates. I have never measured it, but it seems like it could go something like 45 deg shift from the axis of the follower on an aggressive profile like a concave or unversed flanked cam.
Regards
Pat
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RE: Tappet anti-rotation scheme
Norm
RE: Tappet anti-rotation scheme
RE: Tappet anti-rotation scheme
Here's a couple of Isky lifter patents from that time period.
RE: Tappet anti-rotation scheme
RE: Tappet anti-rotation scheme
Regards
Pat
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RE: Tappet anti-rotation scheme
RE: Tappet anti-rotation scheme
Brian,