Re: ELECTRO-CHEMICAL ELAPSED TIME INDICATORS

On 12/14/2024 10:56 PM, Jeff Liebermann wrote:

Sounds more like a timer than an elapsed time indicator.  In the
1970's, we used Agastat pneumatic timers to generate fairly long time
delays up to about 30 mins.  The original technology was a piston and
cylinder, with a controlled air leak.

"Elastic Stop Nut" is all I remember from them.  I scrounged parts from
the controls for a set of pin-setters (from a defunct bowling alley)
as a kid.  In addition to the interlocking "Set-Reset" relay latches
(great for storing a bit!), these were the most interesting as
they would let me delay an action (as long as I kept the coil energized
cuz releasing the coil reset the mechanism).
There was a small screw at the top that you used to adjust the delay.

Electro-Pneumatic timing relay:
<https://us.rs-online.com/mkt/lp/suppliers/te/te-top-products/pdf/te_agastat.pdf>
 There are other companies that make the same type of timer:
<https://www.google.com/search?q=pneumatic+timer>
<https://www.google.com/search?q=pneumatic+timer&udm=2>
I suspect that someone had contrived a MEMS pneumatic timer, but I
couldn't find one.
 Agastat is now owned by TE Connectivity:
<https://www.te.com/en/plp/agastat/Zn5p.html?n=42691&type=products&inStoreWithoutPL=false&q2=>
<https://www.te.com/en/products/brands/agastat.html?tab=pgp-story>