Elisha Otis' son Charles improved on the device that slowed a speeding this, whether or not the rope broke
... control a series of devices to slow down the car if it is speeding only 
slightly,... [DOC] [TLE] THE RISE-BUT RARELY THE FALL-OF THE ELEVATOR - The ... [PAR] Mar 21, 1995 ... "All safe, gentlemen, all safe," Elisha Graves Otis calls down.