The sewing machine (of which, in truth, there were and are many) had a huge economic impact. Seth Goldstein’s necktie-tying machine, arriving many decades later, may have a smaller effect (thanks to investigator Jennie Regules for bringing this to our attention):
BONUS: Bill Nye shows how to tie a bow tie (thanks to investigator Laura Bassett for bringing this to our attention):
BONUS: Professor Lipscomb shows how to tie a bow tie: