Image dissector

[4] Because the dissector does not store charge, it is useful for viewing the inside of furnaces and monitoring welding systems as it does not suffer from the "flare" normal picture tubes experience when looking at intense lights.

A patent was issued in October 1927,[5] and their experiments were announced in the American nationwide distributed magazines Discovery and Popular Radio,[6][7] but they failed to reduce it to practice.

[9] American television pioneer Philo T. Farnsworth invented the first functional image dissector in 1927, submitting a patent application on January 7, 1927.

Further developments that year included improvements in image clarity and an increase in the number of lines of resolution, such that it exceeded that of the mechanical television systems.

[16][17]: 137–141  Farnsworth continued to improve the device, which would come to be called a "multipactor",[18] such that it reportedly could amplify a signal to the 60th power or better,[17]: 139  and showed great promise in other fields of electronics.

[17]: 141 On August 25, 1934, Farnsworth gave the world's first public demonstration of a complete, all-electronic television system, which included his image dissector, at the Franklin Institute in Philadelphia, Pennsylvania.