Conveyors: power-driven – Conveyor or accessory therefor specialized to convey people – By stairway having steps forming an endless member
Patent
1989-10-24
1991-10-01
Olszewski, Robert P.
Conveyors: power-driven
Conveyor or accessory therefor specialized to convey people
By stairway having steps forming an endless member
198323, 198330, 198333, B66B 2100
Patent
active
050525395
ABSTRACT:
A single endless series of steps for up and down flights has inboard end spacing control links, each operated by a gear arrangement at transitions between curved and straight paths of step travel. Steps are molded plastic cores with top mounted tread caps, both the cores and caps being of colors as desired, and with light transmission characteristics from opaque to transparent, as desired. Inter-engaging edges on treads and risers are of curved shape facilitating the transition from straight to curved runs of steps. Break-away stripper comb fingers at landings terminate escalator operation when an object becomes jammed between a step and a finger and breaks a finger. Spring-loaded skirt guards at the sides of steps, and step spacing monitors, include wear indicators. The ascending and descending flights of steps are supported by structural tubes extending between floors, with no other support for the flights. Stabilizer legs, rollers and tracks under the steps maintain the horizontal attitude of the steps. Escalator drive is by belt and rack through the links in one embodiment, and by individual motor-gear sets in the steps driving on stationary curved racks in the other embodiment.
REFERENCES:
patent: 792623 (1905-06-01), Souder
patent: 889080 (1908-05-01), Wheeler
patent: 984495 (1911-02-01), Seeberger
patent: 999885 (1911-08-01), Seeberger
patent: 1956154 (1932-09-01), Lindquist et al.
patent: 2402056 (1944-02-01), King
patent: 2641351 (1953-06-01), Riley
patent: 2695094 (1954-11-01), Riley
patent: 2823785 (1958-02-01), Hefti
patent: 3144118 (1964-08-01), Fabula
patent: 3233717 (1966-02-01), Jin et al.
patent: 3878931 (1975-04-01), Luna
patent: 3986595 (1976-10-01), Asano et al.
patent: 4004467 (1977-01-01), Kenney
patent: 4088219 (1978-05-01), Binns
patent: 4362232 (1982-12-01), Saito et al.
patent: 4397383 (1983-08-01), James
patent: 4413719 (1983-11-01), White
patent: 4434884 (1984-03-01), Kettle
patent: 4470497 (1984-09-01), Kraft
patent: 4483432 (1984-11-01), Ishida
patent: 4486987 (1984-12-01), Naka
patent: 4519490 (1985-05-01), White
patent: 4565276 (1986-01-01), Dengs et al.
patent: 4653633 (1987-03-01), Jacobs
patent: 4662502 (1987-05-01), Nakatani
patent: 4669597 (1987-06-01), Langer et al.
patent: 4746000 (1988-05-01), Nakatani et al.
patent: 4756398 (1988-07-01), Watanabe et al.
patent: 4775043 (1988-10-01), Tomidokoro
patent: 4805757 (1989-02-01), Wilcox
patent: 4809840 (1989-03-01), Nakatani
"Early Risers", American Heritage of Invention & Technology, Winter, 1989, pp. 40-44.
"Along the Way/Shopping", Vis a Vis, Oct. 1989, p. 28.
Brandt, II C. Christopher
Cipra Raymond J.
Fillingsness Geoffrey S.
Bidwell James R.
Melvin Simon & Associates, Inc.
Olszewski Robert P.
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