Conveyors: power-driven – Conveyor or accessory therefor specialized to convey people – By stairway having steps forming an endless member
Patent
1983-09-15
1986-04-08
Valenza, Joseph E.
Conveyors: power-driven
Conveyor or accessory therefor specialized to convey people
By stairway having steps forming an endless member
7386219, B66B 2100, B66B 2306
Patent
active
045806756
ABSTRACT:
Transportation apparatus for transporting passengers between spaced landings, including a conveyor, a conveyor drive unit, a handrail, a handrail drive unit, and a handrail drive pulley. The conveyor drive unit includes first and second spaced sprockets, and a drive chain reeved about the sprockets which drives the conveyor. The handrail drive pulley and a predetermined one of the sprockets are separately journaled for independent rotation about a common axis, with a drive belt linking the handrail drive pulley and predetermined rotational elements of the handrail drive unit. The pulley is selectively engageable with the predetermined one of the sprockets, to drive the handrail in synchronism with the conveyor when they are engaged, and enabling the frictional forces resisting the movement of the handrail to be directly measured when they are not engaged.
REFERENCES:
patent: 2211427 (1940-08-01), Margles
patent: 3568813 (1971-03-01), Schaeffer et al.
patent: 3651919 (1972-03-01), Vollmer
patent: 4231452 (1980-11-01), Kraft
Sturtevant Quality, "Torque Manual", Addison, Illinois (1957).
Alexander Daniel R.
Lackey D. R.
Valenza Joseph E.
Westinghouse Electric Corp.
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