Multi-car elevator hoistway separation assurance

• Main Authors: PERUGGI RICHARD, TERRY HAROLD, WIERSCHKE GILBERT W, ROBERTS RANDALL K, MCCARTHY RICHARD C, SCHIENDA GREG A
• Format: Patent
• Language: English
• Published: 21.04.2015
• Subjects: ELEVATORS; ESCALATORS OR MOVING WALKWAYS; HAULING; HOISTING; LIFTING; PERFORMING OPERATIONS; TRANSPORTING

A pair of elevator cars (10, 11) traveling in the same hoistway have their positions sensed (20-23, 29-32) to provide for each a position signal (35, 37) from which velocity signals (64, 65) are derived; lookup tables (66, 61) of safe stopping distance (B, S) for braking and safeties are formed as a...