Year: 1922 Language: english Author: Dana H.J. Genre: Manual Publisher: Engineering Experiment Station Format: PDF Quality: Scanned pages Pages count: 82 Description: A knowledge of knots has saved many a life in storm and wreck, and if everyone knew how to tie a knot quickly and securely there would be fewer casualties in hotel and similar fires where a false knot in the fire escape rope has slipped at the critical moment and plunged the victim to the ground. Many an accident has occurred through a knot or splice being improperly formed. Even in tying or roping a trunk, few people tie a knot that is secure and quickly made and yet readily undone. How many can tie a tow rope to a car so it will be secure and yet is easily untied after the car has been hauled out of the mud? Or suppose a rope was under strain holding a large timber in midair and a strand in the derrick guy rope shows signs of parting. How many could attach a rope each side of the weak spot to take the strain? The principle of a knot is that no two parts which lie adjacent shall travel in the same direction if the knot should slip. Knots are employed for several purposes, such as, to attach two rope ends together, to form an enlarged end on a rope, to shorten a rope without cutting it, or to attach a rope to another rope or object. Desirable features of knots are that they may be quickly tied, easily untied and will not slip under a strain. In a number of cases a toggle is used either to aid in making the knot or make it easier to untie after a strain has been applied. A number of terms are commonly used in tying knots. The “standing” part is the principal portion, or longest part of the rope. The “bight” is the part curved, looped or bent, while working or handling the rope in making a knot, and the “end” is that part used in forming the knot or hitch. The loose, or free end, of a rope should be knotted or whipped to prevent it from raveling while in use.
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Use of Ropes and Tackle
Language: english
Author: Dana H.J.
Genre: Manual
Publisher: Engineering Experiment Station
Format: PDF
Quality: Scanned pages
Pages count: 82
Description: A knowledge of knots has saved many a life in storm and wreck, and if everyone knew how to tie a knot quickly and securely there would be fewer casualties in hotel and similar fires where a false knot in the fire escape rope has slipped at the critical moment and plunged the victim to the ground. Many an accident has occurred through a knot or splice being improperly formed. Even in tying or roping a trunk, few people tie a knot that is secure and quickly made and yet readily undone. How many can tie a tow rope to a car so it will be secure and yet is easily untied after the car has been hauled out of the mud? Or suppose a rope was under strain holding a large timber in midair and a strand in the derrick guy rope shows signs of parting. How many could attach a rope each side of the weak spot to take the strain?
The principle of a knot is that no two parts which lie adjacent shall travel in the same direction if the knot should slip. Knots are employed for several purposes, such as, to attach two rope ends together, to form an enlarged end on a rope, to shorten a rope without cutting it, or to attach a rope to another rope or object. Desirable features of knots are that they may be quickly tied, easily untied and will not slip under a strain. In a number of cases a toggle is used either to aid in making the knot or make it easier to untie after a strain has been applied.
A number of terms are commonly used in tying knots. The “standing” part is the principal portion, or longest part of the rope. The “bight” is the part curved, looped or bent, while working or handling the rope in making a knot, and the “end” is that part used in forming the knot or hitch. The loose, or free end, of a rope should be knotted or whipped to prevent it from raveling while in use.
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Dana H.J. Use of Ropes and Tackle, 1922.pdf
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