Lee de Forest, “Means for Recording and Reproducing Sound”, #1,446,246 US PATENT, 20 February 1923, Part Two(2).

 

Thomas Edison, “Kinetographic Camera”, #589,168 US Patent, 31 August 1897 was the topic of an earlier blog post.

Lee de Forest, “Means for Recording and Reproducing Sound”, #1,446,246 US PATENT, 20 February 1923, also was the topic of an blog post.

• Here I present: Lee de Forest, “Means for Recording and Reproducing Sound”, #1,446,247 US PATENT, 20 February 1923, Part Two (2).
• 
• Alan Crosland directed the first movie using sound film, ”The Jazz Singer”, 1927 with star actor Al Jolson.
• “Vacuum tube electronics” was the basis of the Lee Deforest patent of 1923 for “talking films”.

Vacuum tube electronics, later allowed  people to be privately “seated” at home in front of television; as opposed to, in publicly “seated” in stage-Theatre & screen-Cinema.

• These “historic tubes” allowed for the invention of television in the post “talking film “ era after 1927; the first televisions began in 1928 (the “Octagon”, shown in chart BELOW).
• Subsequent improvements in “televised screens”in decade occurred in different models of “televised screens” shown BELOW.
• 
• Here I presented: Lee de Forest, “Means for Recording and Reproducing Sound”, #1,446,246 US PATENT, 20 February 1923, Part Two (2).
• SUMMARY.

Theatre and Cinema are architectural settings for publicly “seated” audience.  Televisions allow for private “seated” audience; and, the solution to playwrights  & screenwriters audience seats problem.

 

The “Picture Tube” schematic diagram is ABOVE  has fourteen (14) numbered parts listed BELOW.

1..	Deflection Coils.
2..	Electron Beam.
3..	Focusing Coil.
4..	Phosphor Layer.
5..	Filament.
6..	Graphite Layer.
7..	Rubber Gasket.
8..	Cathode.
9..	Vacuum Glass.
10..	Screen.
11..	Yoke Coils.
12..	Control Electrode.
13..	Contact Pins.
14..	Anode Wire.