. Material handling cyclopedia; a reference book covering definitions, descriptions, illustrations and methods of use of material handling machines employed in industry . rage running time of about 1 the round trip. To allow for delays in loading and un-loading, opening and closing of doors, and dispatching, itwas assumed that each elevator would make ten trips perhour and move four truck loads or 30 tons of freight perhour. Since the maximum requirements of warehouse A wereassumed as 796 tons per hour this would require 27 elevatorswithout allowance for breakdown. Actually 30 elevator
. Material handling cyclopedia; a reference book covering definitions, descriptions, illustrations and methods of use of material handling machines employed in industry . rage running time of about 1 the round trip. To allow for delays in loading and un-loading, opening and closing of doors, and dispatching, itwas assumed that each elevator would make ten trips perhour and move four truck loads or 30 tons of freight perhour. Since the maximum requirements of warehouse A wereassumed as 796 tons per hour this would require 27 elevatorswithout allowance for breakdown. Actually 30 elevatorswere installed in this building. In warehouse B the require- ments were figured at 1,2S0 tons per hour and thus 42 ele-vators were required. No spare equipment was includedin this building. Thus the floor area served by the elevatorsprovided one elevator for each 59,900 sq. ft. in warehouseA and one for each 50,500 sq. ft. in warehouse B. To provide for lifting four trailers at once each car hasa floor area of 9 ft. x 7 ft. with a capacity of 10,000 lb. Doors at either end of the elevators are automatically op-erated by a chain extending from top to bottom of the. Tractors Leaving the Elevators hatchway and back. The doors open when the elevatorreaches the desired floor and are closed by pushing a but-ton. An interlocking switch is provided to prevent the ele-vator from leaving the floor until the door is closed. Thedoors open and close quickly and are checked near thelimits of travel to prevent slamming. They are evenlycounterbalanced and move by means of a friction requires little force to open and close the doors andshould a person be caught under the door it will stop read-ily without danger of serious harm to the individual. Dueto the limited story height the doors open into the hatchway 496 ELEVATORS after traveling a vertical distance of 18 in. This avoids thedestructive action of the truck wheels on bi-parted doorswhere the truck must pass over the edge of th
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Keywords: ., bo, bookcentury1900, bookdecade1920, booksubjecthoistingmachinery
