Electricity: transmission to vehicles – Flexible extensions – Reels
Patent
1978-07-12
1981-03-31
Schacher, Richard A.
Electricity: transmission to vehicles
Flexible extensions
Reels
226183, 242 82, H02G 1100
Patent
active
042588340
ABSTRACT:
A cable winding system carried by a vehicle for extending and retracting cable responsive to vehicle movement. The cable frictionally engages a controllably powered sheave and is guided into a horizontally disposed coil by a cylindrical guide arm having a vertically directed opening adjacent the sheave and a downwardly, radially and circumferentially directed opening adjacent the coil. The guide arm is freely rotatable about a vertical axis so that as cable is extended and retracted the guide arm rotates to guide the cable between the coil and sheave. The powered sheave directs cable from the vehicle through an instrumented fairlead which, through a control system, controls the operation of the sheave. The fairlead is pivotally mounted about a horizontal pivot axis so that the head pivots in one direction as the cable is tensioned and in the opposite direction as the cable tension is relieved. The control system measures the angle of the fairlead and may also measure the vehicle speed to cause the sheave to extend cable as the fairlead moves rearwardly and/or the velocity of the forward vehicle is increased and to retract cable as the fairlead moves forwardly and/or the forward velocity of the vehicle is reduced. Also included is a failsafe system for applying the brakes of the vehicle when the supply of cable in the coil falls to a predetermined value or when the fairlead pivots to a point indicative of excessive cable tension and the rotational velocity of the powered sheave is below a predetermined value.
REFERENCES:
patent: 2319828 (1943-05-01), Rohweder
patent: 2472860 (1949-06-01), Russell
patent: 3120017 (1964-02-01), Ciaccio
patent: 3669377 (1972-06-01), Gilvar
patent: 3777964 (1973-12-01), Kruner
patent: 3843072 (1974-10-01), Rayfield
patent: 4108264 (1978-08-01), Tanaka
patent: 4151965 (1979-05-01), Manabe
Hawley Royal T.
Kalyan Jagdish C.
Rogers Alvin D.
Sheppard Monte G.
Schacher Richard A,.
Western Gear Corporation
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