Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1991-03-28
1992-04-14
Olszewski, Robert P.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
187 20, 254389, 174 42, B66B 900
Patent
active
051039370
ABSTRACT:
A system for limiting oscillation of a stationary or moving elevator cable attached to suspended elevator equipment in an elevator shaft. The system includes a cable oscillation limiting member located at a predetermined vertical position in the elevator shaft. The limiting member is movable between an extended position vertically in line with the suspended elevator equipment and horizontally proximate the cable in its free-hanging state and a retracted position vertically out of line with the equipment and horizontally distal the cable. The extended position tends to limit oscillations of the cable and the retracted position permits the elevator equipment to pass the member without interference from the member or members and without substantial contact between the elevator equipment and the member under normal operating conditions. The system includes sensors to determine the need for moving the limiting member between its extended and retracted positions, depending upon the position of the elevator. The system may also use the magnitude of forces tending to induce oscillations in the cable for determining when to move the limiting member to and from the extended and retracted positions.
REFERENCES:
patent: 1145914 (1915-07-01), Magnuson
patent: 3295832 (1967-01-01), Fowler
patent: 3662862 (1972-05-01), Poller
patent: 3666051 (1972-05-01), Davis et al.
patent: 4079816 (1978-03-01), Ohta
patent: 4117908 (1978-10-01), Nara et al.
patent: 4664229 (1987-05-01), Obst
patent: 4716989 (1988-01-01), Coleman et al.
Noland Kenneth
Olszewski Robert P.
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