The Achievement of Television: The Quality and Features of John Logie Baird’s System in 1926

Before “true television”: investigating john logie baird’s 1925 original television apparatus [scanning our past]

“…The description and diagrams included a dynamo/generator on the transmitter's driveshaft connected (more likely in practice by wire) to a synchronous motor that drove the remote receiver-display. Such a method was subsequently used for the 1926 Televisor display [8].…”

“…As described by Baird in 1928, the Phonovision studio shared lighting and scanning equipment with his Noctovision experiments [7,[6][7][8]. As a result, it is likely that the Phonovision recordings were made using the vision signal from Noctovision's thalliumoxysulfide photocell and amplifier.…”

“…This article presents the results of an extensive investigation involving access to museum acquisition documents and published material as well as a forensic-level analysis of the machine. The methods used were adapted from those developed for investigating Baird's "Phonovision" video recording experiments and the Frith Street demonstration [7], [8]. The outcome is an assessment of the validity of the machine together with an interpretation of the development stages that Baird is likely to have taken between 1924 and 1925 in his pursuit of providing practical television for all.…”

John Logie Baird and the secret in the box: The undiscovered story behind the world’s first public demonstration of television [Scanning Our Past]

“…This had 16 lenses arranged in two spiral arrays of eight, which formed part of an interlacing system with which Baird was also experimenting, in an attempt to reduce image flicker. That scanning apparatus has been extensively analyzed and documented by McLean [12]. The double-eight disk continued to be used for experimentation and development and allowed Baird to refine other aspects of the scanning technology, ultimately leading to the updated scanning design.…”

“…He did this by recognizing the applicability of components developed by others and incorporating useful advice, then adapting these or developing new approaches to serve his task. Here, we present our analysis of the critical steps of Baird's success, and we derive an interpretation of the events and Baird's choices that have puzzled historians of technology [2, p. 105-106], [3, p. 49], [8, p. 140-141], [9, p. 29], [12], [13 p. 35], [22, pp. 120-121], [30, p. 26] until now.…”