This exhibit from 1917 is a further refined experimental Type G Pliotron that led to the CG 886, VT-1 & VT-11. This has a UV base cap with brass skirt. Note the locating pin for the bayonet base.The tungsten filament was formed into a helix.From the Tyne Collection. Thanks to Joe Gruber for sending the image.The balloon envelope is 35 mm in diameter and, excluding the UV base pins, is 101 mm tall.References: J Gruber & 1047. Type Pliotron was first introduced in 1915. See also 1915 adverts. |
