Abstract: An improved line stringing block utilizes a double gate mechanism to transfer a lead line from the exterior of the block frame to the interior of the block frame. An outer gate is held open until the line is received within a passageway in the block frame. A non-load bearing inner gate is held closed to maintain alignment of said frame until the line is received in the passageway. A spring loaded trigger within the passageway releases the inner gate and closes the outer gate which becomes a load bearing gate.

Abstract: A ground roller assembly for a bundle conductor stringing block utilizes a plurality of independently mounted grounding sheaves which are individually resiliently biased upwardly to engage an associated conductor. The plurality of independently mounted sheaves form an assembly which is connected by a mounting bar which extends between two upwardly biased support arms to position the ground roller assembly proximal the periphery of the conductor stringing block to engage the conductors. The support arms are upwardly biased such that the entire assembly pivots downwardly about the periphery of the stringing block upon proper engagement of all of the conductors within their associated grounding sheaves.