Lifting and forcing pump device with a pneumatic membrane controlled by a fluid or gas under pressure
FR2542016A1
Exit connecting device for a lead anode and gold-plated cathode
FR2514535A1
Explosive gas atmosphere monitoring device - has automatic power cut=off when oxygen concn. falls and explosive gas concn. rises and has two integrated operational amplifiers
FR2482072A1
Lift cage manual release mechanism - has length of cable wound on drum on cage roof released from inside of cage
FR2399596A1
Fluid two way valve - contains liq. in curved tube which can rock about pivot to connect alternative junctions
FR2338186A1
Steering or braking flaps for ships hull - can pivot about vertical axis or extended outwards from guide grooves
FR2331791A1
Appts. for detecting noxious gases in air - esp. minute traces of hydrazine
