[GreenKeys] Morse perforator

[Richard Knoppow]

    Ted McElroy made a perforator something like this. Shown in his advertising.  Three keys, dot, dash and space but probably took no more force than a typewriter.  Must still have been slow and tedious compared to a keyboard machine. 


-----Original Message-----
>From: Duncan Brown <duncanancy at earthlink.net>
>Sent: Mar 27, 2017 10:46 AM
>To: Green Keys <greenkeys at mailman.qth.net>
>Subject: [GreenKeys] Morse perforator
>
>The original "Morse Perforator" was invented by Sir Charles Wheatstone 
>in about 1860. It was a completely manual device consisting of three 
>pads or buttons that where hit with mallets, one held in each hand.
>
>
>
>The left button was for a "dot", the right button for a "dash", and the 
>center for a space.  Imagine pounding out Morse messages all day with 
>that!  Eventually they came up with a pneumatically-powered unit that 
>didn't take as much effort, but you were still swinging your arms up & 
>down to punch the tape.
>
>
>in about 1910, Edward Kleinschmidt patented a solenoid operated keyboard 
>perforator that was much easier to use. It also included keys with some 
>of the prosigns (AR, SK).
>
>
>  It perforated the same code that Wheatstone had developed and is often 
>called a "Wheatstone Perforator", but should really be called a 
>Kleinschmidt perforator (or "Klein").  In 1924, Kleinschmidt Electric 
>merged with the Morkrum Company, and then they changed their name to 
>Teletype Corp. in 1928. Teletype Corp continued to make the "Kleins" 
>until about 1950 and they remained in regular use at least into the 1960s.
>
>It was probably the Morse perforator that gave Donald Murray the idea of 
>doing the same thing for printing telegraphs with a 5-hole punched tape 
>in 1899. Murray used Baudot's idea of a 5-bit code, but redesigned the 
>code to minimize wear on the equipment by giving the most used 
>characters (E, T, Space) the fewest punches. He also foresaw the use of 
>page printers and added LF & CR characters. The official ITA2 code of 
>1931 is very similar to Murray's code of 1899.
>
>
>Have fun,
>
>Duncan, K2OEQ
>AWA Museum
>
>
>
>---
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