This exhibit is a mystery and we would love to find out more about it and what it was designed to do. It has a nine contact base with long leads attached. The structure suggests an electron multiplier.
The Pinch with eight red-plat leads passing through it.
The electrodes are held in a glass rod - seen at the bottom of this image. The first electrode is L shaped. Subsequent electrodes are stepped. And this suggests a cathode at the base working to the next anode above.
The glass rod support and the dual supports for each plate arrangement.
The top of the envelope with evacuation pip and connection to the final plate. There is also a small glass rod support that appears to connect to the lower rod support.
A closer look at the plates.
The base with attached leads.
The wide glass tube envelope is 37 mm in diameter, and including the base is 170 mm tall.
Updated March 08, 2014. shape:wide.glass.tube construction:pinch age:1920.1930 base: pin: