Crossword puzzle clue "his parade included parts for typewriter foghorn and rattle"

CREST, to reach a peak

DETENT, any stop or catch in a machine which prevents a motion until released, e.g. on a crossbow

KEY, to enter (data) into a computer

PASSKEY, a key that opens several different locks

PLATEN, the part of a printing press which presses the paper against the type and by which the impression is made