The article illustrates an old 1930's Teletype model 15 with it's separate Carriage Return and Line Feed keys, and claims that these were kept separate (vs a si

The article illustrates an old 1930's Teletype model 15 with it's separate Carriage Return and Line Feed keys, and claims that these were kept separate (vs a single key/code that performed/represented CR + LF) so that sending the separate LF gave the receiving device enough time to mechanically perform the CR function. I wonder if this is quite correct? This Teletype use Baudot code, not ASCII, as reflected by the keyboard including LTRS and FIGS keys. Baudot was only a 5 bit code, so in order to be able to represent/transmit more characters than 5 bits would allow, it used the LTRS (letters) and FIGS (figures) codes to select different character sets (cf ASCII SI & SO), which the receiving system would then need to keep track of. Apparently the convention was to send the sequence "CR LF LTRS LTRS" to both advance to next line and select the letters character set, with sending the semantically redundant double "LTRS LTRS", giving the receiving teletype enough time to complete the preceding mechanical movements (CR, LF). Given this, it seems that keeping LF distinct from a combined CR+LF operation wasn't needed for timing considerations - one could have just sent as many LTRS as needed. I wonder was there perhaps a use case for LF without CR with the old Teletypes, or perhaps keeping them separate was just due to the simple mechanical nature of these devices and the different mechanical operations needed to perform CR vs LF ?