[time-nuts] pneumatically synchronized clocks
rrezaian at motorola.com
Tue Mar 10 13:07:27 EDT 2009
Also it seems that there was at least one company making pneumatic
master/slave clock systems for buildings. I've found references to
these made by the Hahl company out of Chicago.
Not sure if any of these are still in service anywhere.
I know pneumatic building automation systems are still actively in
use today, I believe the office building where I work uses pneumatic
thermostats for part of the HVAC control.
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