Ladder-guided service elevator

Details Ladder-guided service elevator Ladder-guided service elevator

1982-10-06

1984-08-28

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Ladder with vertically moving platform or escape

Ladder supports platform

182 43, 182141, 182 82, 187 19, B66B 900, E06C 712

Patent

active

044678894

ABSTRACT:
A service elevator, designed to carry persons up or down along a building wall or other structure, comprises a ladder secured to that structure and a carriage on which an endless conveyor band is supported. The band has projecting dogs engaging the rungs of the ladder which are held between a first stringer of circular cross-section and a second stringer of rectangular cross-section. The band-supporting frame has sleeves slidably engaging the first stringer and roller pairs bracketing the second stringer. A second conveyor band, serving as a standby for the working band, corotates therewith and has dogs slightly offset from those of the latter for dropping onto the rungs when the working band fails.

REFERENCES:
patent: Re15028 (1921-01-01), Hunter
patent: 767244 (1904-08-01), Rieg
patent: 1634854 (1924-07-01), Scollard
patent: 2338833 (1944-01-01), Bailey
patent: 2438791 (1948-03-01), Russell
patent: 2647675 (1953-08-01), Bernett
patent: 3141521 (1964-07-01), Read
patent: 3256956 (1966-06-01), Puhringer
patent: 3908801 (1975-09-01), Pohlman
patent: 3946836 (1976-03-01), Maack
patent: 4018306 (1977-04-01), Lyons

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