Multiple cable suspension assembly

Details Multiple cable suspension assembly Multiple cable suspension assembly

1976-02-24

1977-05-24

Paperner, L. J.

Supports

Pipe or cable

Extending through plate

14 22, 248324, E02F 375

Patent

active

040249697

ABSTRACT:
A multiple cable suspension means for connecting the boom point of an earth moving shovel to a rigid gantry. The apparatus generally consists of four cables of predetermined length, an assembly for connecting the cables to the boom point and an assembly for connecting the cables to the gantry. The assemblies connecting the cables to the boom point and the gantry are generally pivotable in such a manner as to equalize the tensile stresses acting on the four cables such that, even if the cables are not of exactly the same length, the tensile stresses will be evenly distributed. The equalizer assembly connecting the four cables to the gantry comprises two plates which are horizontally spaced and which are pivotable around a horizontal axis, each one having two cable ends connected to it. The equalizer assembly connecting the four cables to the boom point similarly generally comprises two spaced apart plates which are connected to the boom point in such a manner that they are pivotable around a horizontal axis. In order to equalize the stresses, each of the two cables which are attached to the same equalizer plate of the equalizer assembly at the gantry are attached to separate plates of the equalizer assembly at the boom point, and the two cables which are attached to the same equalizer plates at the boom point are attached to separate equalizer plates at the gantry. This arrangement of the cables in conjunction with facility of the equalizer plates to pivot compensates for cables of slightly different lengths such that the tensile stresses on the cables resulting from a load being placed on the boom are evenly distributed to all four cables.

REFERENCES:
patent: 1891115 (1932-12-01), Scott
patent: 2385488 (1945-09-01), Beatty
patent: 3160298 (1964-12-01), Talley
patent: 3228535 (1966-01-01), Butcher
patent: 3501034 (1970-03-01), Baron
patent: 3580405 (1971-05-01), Siegel

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