Implements or apparatus for applying pushing or pulling force – Method or apparatus for placement of conductive wire – Utility pole guide
Patent
1974-10-04
1978-12-12
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Method or apparatus for placement of conductive wire
Utility pole guide
254193, 254197, B66D 136
Patent
active
041292871
ABSTRACT:
A conductor stringing block adapted to be threaded with a hauling line dropped by helicopter and having a suspension yoke connected at its ends to the opposite sides of the block frame. The yoke includes a threading passage which is normally closed by a latch effective to transmit load forces crosswire of the passage. The upper end of the threading passage is equipped with an outwardly and upwardly inclined extension to receive and feed a helicopter-dispensed hauling line into the passage. Upright extensions projecting downwardly from the lower end of the passage flex to pass a power line running board and guide the hauling line as it drops from the threading passage onto an underlying sheave of the stringing block. The yoke assembly is securable crosswise of the upper end of a conventional stringing block in lieu of the conventional suspension yoke thereby converting the conventional block to use with helicopter threading equipment.
REFERENCES:
patent: 2527651 (1950-10-01), Pieper
patent: 2806380 (1957-09-01), Martin
patent: 3077337 (1963-02-01), Cronkright
patent: 3195862 (1965-07-01), Sherman
patent: 3199840 (1965-08-01), Lindsey
patent: 3479014 (1969-11-01), Reilly et al.
patent: 3837623 (1974-09-01), Chadwick
Lindsey Keith E.
Lindsey L. E.
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