Valve control system

Details Valve control system Valve control system

B - Operations, Transporting

66

B

364/32

B66B 1/28 (2006.01) B66B 1/24 (2006.01)

Patent

CA 1163737

ABSTRACT A hydraulic elevator is employed having the usual call buttons at the respective floors and selector buttons for all floors located in the elevator cab. When a button is pushed to select a floor to which the cab is to travel, up or down, as the case may be, the cab starts moving slowly in the selected direction. During initial movement a cam on the cab triggers components in an electric cir- cuit which, by motivating hydraulic valving causes the cab initially to accelerate to a selected rate of travel after which travel proceeds at the selected rate to a slow down point. At that point another component is trig- gered and the valving causes the cab to decelerate for a selected interval of travel, after which the cab moves slowly to the level to which it was called.

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