Deropement sensor apparatus with gravity-biased, falling, magnet

Details Deropement sensor apparatus with gravity-biased, falling, magnet Deropement sensor apparatus with gravity-biased, falling, magnet

1985-09-20

1987-06-09

Reeves, Robert B.

Railways

Traction

Cable

1041731, 200 6118, 242148, 335207, 361180, B61B 1206, H01H 3600

Patent

active

046711872

ABSTRACT:
To detect impending deropement of a wire haul rope from supporting sheaves in an aerial tramway system, there is provided a magnetic assembly having sufficient field strength to support itself in a predetermined position by reason of attraction to the wire haul rope when running normally in the sheaves. When the wire haul rope begins to run off one of the sheaves toward an impending deropement, the magnetic assembly will fall from its armed position to a substantially moved position. The magnetic assembly carries at least one position-responsive switch which interrupts a detection circuit when the magnet moves to the moved position. The interruption of the detection circuit is utilized to detect the location of the potential deropement and to terminate tramway operation.

REFERENCES:
patent: 2685626 (1954-08-01), Zwack
patent: 2987593 (1961-06-01), Alley
patent: 3115847 (1963-12-01), Turner et al.
patent: 3140670 (1964-07-01), Renninger
patent: 3302588 (1967-02-01), Bennett
patent: 3560846 (1971-02-01), Bessko
patent: 3611218 (1971-10-01), Fujita
patent: 3822369 (1974-07-01), Kunczynski
patent: 4019002 (1977-04-01), Kunczynski
patent: 4107492 (1978-08-01), Moon, Jr. et al.
patent: 4271763 (1981-06-01), Berger
patent: 4363945 (1982-12-01), Kunczynski
patent: 4462314 (1984-07-01), Kunczynski

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