The telectroscope (also referred to as 'electroscope') was the first non-working prototype (i.e. conceptual model) of a television or videophone system. The term was used in the 19th century to describe science-based systems of distant seeing.
The name and its concept came into being not long after the telephone was patented in 1876, and its original concept evolved from that of remote facsimile reproductions onto paper, into the live viewing of remote images.(Wikipedia)