[GreenKeys] Wheatstone Tape setup 1930

[Richard Knoppow]

     The Wheatstone system used one row of holes to start the 
element and another to stop it so it could send either dots or 
dashes depending on the spacing of the holes in each row. Another 
system used tape punched in the actual pattern of the code. This 
is the pattern used in the familiar Instructograph machine and is 
what you describe. I don't know how Instructograph punched their 
tapes or how they duplicated them.
    Its easy to read the Instructograph tapes by eye while I 
think its probably difficult to read the Wheatstone tapes but for 
reading an ink recorder would be used.

On 7/12/2021 11:26 AM, Harold Hallikainen wrote:
> I saw a Morse tape reader in an antiques store years ago. It was part of a
> code practice system. Should have bought it! Also, the FCC office in San
> Francisco had one of these when I took my license exam in 1969.
>
> It's interesting that they used separate areas of the tape for dot and
> dash with the same sized hole for each. It seems like it would be a lot
> simpler to use variable sized holes (a dot punch and a dash punch) on the
> perforator side. The reader would then just pull the tape through at a
> constant speed. It would use more tape, but the reader would be a lot
> simpler.
>
> Did anyone do something like this?
>
> Harold
> https://w6iwi.org
>
>
>
>

-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL