The stick shakers originated with the first jets - late 1950s... Some airplanes are so "smooth" when approaching a stall (in "clean" configuration) that they even rarely get activated in such circumstances (i.e. 747)... By chance, 747s do stall very nicely, and fall nose down.
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The stick pusher was a later addition to the stick shakers. The BAC One/Eleven prototype entered in a unrecoverable stall (early 1960s) that the British CAA/ARB required the installation of stick pushers on various "T-tail" airplanes.
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My first encounter with "stick pushers" was in the early Lear 23/24s. We trained for stall recoveries down to stick shaker speed, and never failed to put ignition "ON" for the maneuver, as it was feared that engines might flame-out as well. No need to say, stick shaker/pusher failure was a "NO GO" item.
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Happy contrails