1973 1973 1973 1973 1973 1973 1970 1970 Alumnium flanges allow a metal-on-metal seal by deforming when tightened. Nowadays (2015) such seals are used with Klein Flanges. CERN Courier 151-154 10 5 1970 1970 Machine for weaving wires for use in multiwire proportional wire chambers: An older version of the machine pictured was used to to wind the (thick) wires used for spark chambers. In 1968, Georges Charpak invented the Multiwire Proportional Chamber, and the machines were modified to handle the thinner (20 µm) wires used in these machines. Charpak won the 1992 Nobel Prize in Physics "for his invention and development of particle detectors, in particular the multiwire proportional chamber". 1970 1970 The power entry for the Big European Bubble Chamber (BEBC) was inserted in a tube. The engraved chicanes (grooves) thus allowed circulation of the cooling fluid, in this case helium. 1970 1970 Damaged commutator from a DC motor 1973 1973 1969 1969 Multi-wire proportional chamber (MWPC)