Electricity: transmission to vehicles – Flexible extensions – Reels
Patent
1976-08-26
1978-01-31
Kunin, Stephen G.
Electricity: transmission to vehicles
Flexible extensions
Reels
244 33, H02G 1100
Patent
active
040711242
ABSTRACT:
A land vehicle such as an electric motor-operated power shovel working on the floor of an open pit mine is supplied with electrical power from a remote source by a flexible electric power cable. To prevent vehicles working within and moving along the floor and terraced sides of the mine pit from being obstructed by or traveling over and damaging the power cable, such cable is suspended between its ends from a lighter-than-air balloon tethered at an elevation above the shovel and terrain between the power source and the shovel. The balloon is tethered to a support cable anchored at one end near the power source and at the other end to the shovel. Connectors placed at intervals along the support cable interconnect the support cable and the power cable while enabling the power cable to slide in opposite directions along the support cable. The support cable is connected to the shovel in a manner enabling the shovel to rotate while working without twisting the cables.
REFERENCES:
patent: 1055691 (1913-03-01), Aalborg
patent: 3412819 (1968-11-01), Kruckman
patent: 3658278 (1972-04-01), Batchelor
patent: 3704350 (1972-11-01), Itoh
patent: 3706385 (1972-12-01), Stewart
patent: 3839631 (1974-10-01), Goddard
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