[GreenKeys] Teletype clutches

[Jones, Douglas W]

The Wikipedia entry for 'clutch' had a subsection on the cascaded-pawl single-revolution clutches found in Teletypes (and some other mechanisms). It needed an illustration, so I opened up the most accessible of the clutches on the Teletype we're restoring here at Iowa, took a photo (actually, a bunch of them, from which I selected the best), and put it up as an illustration.  I also cleaned up the wording a bit.

https://en.wikipedia.org/wiki/Clutch#Cascaded-pawl_single-revolution_clutches

If the e-mail system murdered the link above, use the shorter link below and then scroll down to the cascaded-pawl section.

https://en.wikipedia.org/wiki/Clutch

		Doug Jones
		jones at cs.uiowa.edu