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US 4,399,890 AGranted
Independently mounted fall prevention apparatus
AssigneeInternational Telephone and Telegraph Corporation
InventorsLeroy R. Bartels, John H. Lawson, Paul L. King
Life of this patent
Estimating the term…
Abstract
A flexible cable safety system for a fixed ladder is mounted adjacent to and independent of the ladder. This arrangement is useful for ladders which are not designed to withstand the loads imposed when a safety system arrests the fall of a workman.
Claims4
Safety cable apparatus for use in a fall prevention system adapted for use with a fluid mounted ladder in a mine, said apparatus comprising:
- a flexible safety cable;
- a mounting plate, said mounting plate being adapted for fastening to the ceiling of said mine by means of mounting pins;
- an upper mounting bracket having upper and lower arms and a web interconnecting said upper and lower arms, said upper arm being fixedly mounted to said mounting plate, said lower arm having an aperture;
- a pin having a lower portion extending through said aperture and being swaged to said cable, said pin having an upper portion having a diameter greater than the diameter of said aperture, said upper portion being supported by said lower arm;
- a lower mounting bracket coupled to the lower end of said cable and fixedly mounted to a floor below said ladder;
- said upper and lower brackets being positioned such that said cable is supported in proximity to said ladder.
3 more elements
Dependencies are inferred from the claim text.