[sdiy] Drawbar and pedalboard

[Terry Bowman]

I meant to send this to the list...

> On Mar 26, 2025, at 7:12 PM, Donald Tillman <don at till.com <mailto:don at till.com>> wrote:
> 
> The Rolamite is a low-friction linear pulley arrangement.  It was heavily promoted in the old Edmund Scientific catalog as a new "Simple Machine", but I've never heard of many applications for it.  Apparently it's used as a crash detector for airbags.


I remember when the Rolamite debuted. I think there was an article in Popular Science about it then it turned up in the Edmund catalog. 

Perhaps I have it mixed up with fluidics. That actually went somewhere. EMP-proof if nothing else.

[later]

Here it is along with other articles from the time (long, lots of great illustrations):

http://www.rexresearch.com/wilkes/1wilkes.htm#ps <http://www.rexresearch.com/wilkes/1wilkes.htm#ps>


Terry Bowman, KA4HJH
"The Mac Doctor"

https://www.astarcloseup.com <https://www.astarcloseup.com/>

"I’ve seen things you people wouldn’t believe. Attack ships on fire off the shoulder of Orion. I watched c-beams glitter in the dark near Tannhäuser Gate. 

"All those moments will be lost in time like tears in the rain."— Roy Batty, Blade Runner



Terry Bowman, KA4HJH
"The Mac Doctor"

https://www.astarcloseup.com

“...the book said something astonishing, a very big thought. The stars, it said, were suns but very far away. The Sun was a star but close up.”—Carl Sagan, "The Backbone Of Night", Cosmos, 1980


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