Constrictor knot
Channel: 宇宙のすべての知識 プリンシピア
Date: 2019-03-05

Constrictor knot, by Wikipedia https://en.wikipedia.org/wiki?curid=37469 / CC BY SA 3.0

#Binding_knots
Constrictor knot

The constrictor knot is one of the most effective binding knots. Simple and secure, it is a harsh knot that can be difficult or impossible to untie once tightened. It is made similarly to a clove hitch but with one end passed under the other, forming an overhand knot under a riding turn. The double constrictor knot is an even more robust variation that features two riding turns.

First called "constrictor knot" in Clifford Ashley's 1944 work "The Ashley Book of Knots", this knot likely dates back much further. Although Ashley seemed to imply that he had invented the constrictor knot over 25 years before publishing "The Ashley Book of Knots", research indicates that he was not its originator. Ashley's publication of the knot did bring it to wider attention.

Although the description is not entirely without ambiguity, the constrictor knot is thought to have appeared under the name "gunner's knot" in the 1866 work "The Book of Knots", written under the pseudonym Tom Bowling. in relation to the clove hitch, which he illustrated and called the "builder's knot". He wrote, "The Gunner's knot (of which we do not give a diagram) only differs from the builder's knot, by the ends of the cords being simply knotted before being brought from under the loop which crosses them." Oddly, when J. T. Burgess copied from Bowling, he changed this text to merely state "when the ends are knotted, the builder's knot becomes the gunner's Knot." Although this clove hitch with knotted ends "is" a workable binding knot, Burgess was not actually describing the constrictor knot. In 1917 (& 1912?), A. Hyatt Verrill illustrated Burgess' clove hitch variation in "Knots, Splices and Rope Work".

The constrictor knot was clearly described but not pictured as the "timmerknut" ("timber knot") in the 1916 Swedish book "Om Knutar" ("On Knots") by Hjalmar Öhrvall. Finnish scout leader M...