chicot60
02-21-2015, 01:40 PM
http://i.imgur.com/9Jy5qJ4.jpg
These were developed in the 50s and used ultrasonic sound the corresponding TV was designed to pick up.
http://i.imgur.com/lSmnrsU.jpg
No electronics at all! Just aluminum rods of different lengths. The buttons actuate an aluminum striker for each rod.
http://i.imgur.com/PCapAga.jpg
You can see the tops of the strikers here...
http://i.imgur.com/fVl8FfY.jpg
And here is the far left striker. Each one is a slightly different length, and has as many grooves around the center as each corresponding rod has around one end.
These were developed in the 50s and used ultrasonic sound the corresponding TV was designed to pick up.
http://i.imgur.com/lSmnrsU.jpg
No electronics at all! Just aluminum rods of different lengths. The buttons actuate an aluminum striker for each rod.
http://i.imgur.com/PCapAga.jpg
You can see the tops of the strikers here...
http://i.imgur.com/fVl8FfY.jpg
And here is the far left striker. Each one is a slightly different length, and has as many grooves around the center as each corresponding rod has around one end.