Another time let me tell you of new adventures in "Pneumatic Logic circuits" just joking !!!
No joke. Pneumatic logic circuits and continuous control mechanisms, along with measurement and recording devices, were used for many years in process control. ....
G’day; you might be interested to know that the audial enemy
plane detectors in London at the early part of the war before
radar, layed and trained the AA guns in the local parks by
pneumatic logic circuits! In a research establishment in 1949
we bought one to cannibalize for parts to be used for various
gadgets our folk dreamed up (I used a couple of bits myself) and
we bought them as scrap for four pence per pound!! And more
beautiful pieces of ultra precision machinery you will never see.
Talk about gears with no backlash whatever… Cheers,
/\ / / / / Johnb@ts.co.nz / /__|\ (_______) In sunny temperate Mapua NZ -