[GreenKeys] punches spaced along the tape

[John Nagle]

Jim Haynes wrote:
> I've read of, but never seen, punched tape systems where the punches
> of a character were not all in one vertical column, but were spaced
> along the tape, so each bit could be read as it was needed for
> transmission.  (and which must have run through a lot of tape,
> compared with the more modern designs)

    The Wheatstone Morse Perforator worked sort of like that, with two
tracks for dot and dash. Each punching operation punched
all the holes for one Morse character.  The tape has
two tracks and a feed hole. A dot takes up one tape
frame, and a dash takes two.

Video of Wheatstone gear:

     https://www.youtube.com/watch?v=j-KDUpvMZfA

Siemens and Boehm implementations of the same concept:

     https://www.youtube.com/watch?v=dWtdHKrxGfA

Manual:

http://www.samhallas.co.uk/repository/telegraph/b3_morse_keyboard_perforators.pdf

			John Nagle