Transmitting portion of original television experimental apparatus, created and used by John Logie Baird, with a dummy head of "Stookie / Stooky Bill". 1925-1926.
This original Television apparatus was made of 16 lenses fitted in two half-spirals on a cardboard disc cut from a hat box. This was connected to a large motor mounted on an old tea chest which turned the disc. As the disc rotated, each of the lenses scanned a different part of the subject and focused light into Baird's secret photosensitive cell, where it was turned into an electrical signal which could be sent to a receiver.
Receiving equipment had a similar disc and showed small but recognisable images of human faces with 32 lines of resolution on a ground glass screen. The light was provided by a neon tube which shone through the spinning receiver disc onto the glass.
John L Baird succeeded in transmitting the silhouette in 1923 and the full recognisable image in 1925. During the experiment, a dummy head called ‘Stooky Bill’ was used as the apparatus would become too hot for humans.
- Radio Communication
- Object Number:
- aluminium (metal), cardboard, electrical components, glass, hair, paint, plaster of Paris and wood (unidentified)
without plinth: 850 mm x 1770 mm x 630 mm,
overall estimate: 335 mm x 780 mm x 655 mm, 87 kg
- tools and equipment
- John Logie Baird