snatchblock

Before you could say "Jack Robinson," the whip was down and the purchase in the top; then, the standing part of the tackle was made fast to the yard pendant and the spar swayed up, as the men walked away with the fall, which was rove through a snatchblock hooked on to a ringbolt fixed in the deck and led to the capstan.

Crown and Anchor Under the Pen'ant John B. [Illustrator] Greene

At 3.45 p.m. an attempt was made, which failed owing to the breaking of a snatchblock.

The Insurrection in Paris