From Ascending Rooms to Express Elevators: A History of the Passenger Elevator in the 19th CenturyElevator World Inc, 2002 - 316 sider |
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19th century American Architect American Contract Journal American Machinist Architect and Building architectural attached Baldwin basement belt Boston brake Chicago counterweight Crane Elevator cylinder December Electric Elevator electric motor eleva Elevator Accident elevator car elevator design elevator operator elevator service elevator shaft elevator system elevator-boy Elisha Otis employed Engineering Record Equitable Building feet per minute Figure freight elevator freight hoists Hale hoisting cables Hoisting Machine horizontal Improvement in Elevators Improvement in Hydraulic installed invention inventors July June lever line shaft load located Manufacturer and Builder mechanical November October office building OFFICE OFFICE OFFICE Otis Brothers Otis Elevator passenger elevator Patent piston platform Pratt pressure pulley pump safety device Scientific American screw September shipper rope speed Sprague Standard Hydraulic Elevator steam engine Stebins stop tank traveling sheaves typical valve vator vertical transportation Western Union Building winding drum worm gear York City York Tribune