From Wikipedia, the free encyclopedia
Lifting hook on a crane truck with a standard round hook and a gated opening
A cabin hook used as a latch for a wooden gate
Fish hooks are pointed and often barbed to help catch and tether a fish's mouth
The main anchor of IJN battleship Hiei with the classic double-hook design
Clothes hangers with a top hook to hang onto a crossbar or a clothesline
A grappling hook with multiple hooks to increase the chances of catching and anchoring onto a surface or an object
A crochet hook with a deep hooking groove near the tip, used to pull yarns during embroidery
A hook-and-eye clasp is composed of two pieces that are sewn to clothing, one of which serves as a hook while the other as a staple

A hook is a tool consisting of a length of material, typically metal, that contains a portion that is curved/bent back or has a deeply grooved indentation, which serves to grab, latch or in any way attach itself onto another object. The hook's design allows traction forces to be relayed through the curved/indented portion to and from the proximal end of the hook, which is either a straight shaft (known as the hook's shank) or a ring (sometimes called the hook's "eye") for attachment to a thread, rope or chain, providing a reversible attachment between two objects.

In many cases, the distal end of the hook is sharply pointed to enable penetration into the target material, providing a firmer anchorage. Some hooks, particularly fish hooks, also have a barb, a backwards-pointed projection near the pointed end that functions as a secondary "mini-hook" to catch and trap surrounding material, ensuring that the hook point cannot be easily pulled back out once embedded in the target.

Variations

Golden pothook pictured in the coat of arms of Jäppilä

References

  1. ^ Unger-Hamilton, Romana (July 1985). "Microscopic Striations on Flint Sickle-Blades as an Indication of Plant Cultivation: Preliminary Results". World Archaeology. 17 (1): 121–6. doi: 10.1080/00438243.1985.9979955.
  2. ^ Banning, E.B. (1998). "The Neolithic Period: Triumphs of Architecture, Agriculture, and Art". Near Eastern Archaeology. 61 (4): 188–237. doi: 10.2307/3210656. JSTOR  3210656. S2CID  164006022.
  3. ^ Beazley, Elisabeth (1990). Beazley's Design and Detail of the Space Between Buildings. Taylor & Francis. p. 230. ISBN  978-0-419-13620-0.
  4. ^ Porter, Brian; Christopher Tooke (2007). Carpentry and Joinery 3. Butterworth-Heinemann. p. 200. ISBN  978-0-7506-6505-6.
From Wikipedia, the free encyclopedia
Lifting hook on a crane truck with a standard round hook and a gated opening
A cabin hook used as a latch for a wooden gate
Fish hooks are pointed and often barbed to help catch and tether a fish's mouth
The main anchor of IJN battleship Hiei with the classic double-hook design
Clothes hangers with a top hook to hang onto a crossbar or a clothesline
A grappling hook with multiple hooks to increase the chances of catching and anchoring onto a surface or an object
A crochet hook with a deep hooking groove near the tip, used to pull yarns during embroidery
A hook-and-eye clasp is composed of two pieces that are sewn to clothing, one of which serves as a hook while the other as a staple

A hook is a tool consisting of a length of material, typically metal, that contains a portion that is curved/bent back or has a deeply grooved indentation, which serves to grab, latch or in any way attach itself onto another object. The hook's design allows traction forces to be relayed through the curved/indented portion to and from the proximal end of the hook, which is either a straight shaft (known as the hook's shank) or a ring (sometimes called the hook's "eye") for attachment to a thread, rope or chain, providing a reversible attachment between two objects.

In many cases, the distal end of the hook is sharply pointed to enable penetration into the target material, providing a firmer anchorage. Some hooks, particularly fish hooks, also have a barb, a backwards-pointed projection near the pointed end that functions as a secondary "mini-hook" to catch and trap surrounding material, ensuring that the hook point cannot be easily pulled back out once embedded in the target.

Variations

Golden pothook pictured in the coat of arms of Jäppilä

References

  1. ^ Unger-Hamilton, Romana (July 1985). "Microscopic Striations on Flint Sickle-Blades as an Indication of Plant Cultivation: Preliminary Results". World Archaeology. 17 (1): 121–6. doi: 10.1080/00438243.1985.9979955.
  2. ^ Banning, E.B. (1998). "The Neolithic Period: Triumphs of Architecture, Agriculture, and Art". Near Eastern Archaeology. 61 (4): 188–237. doi: 10.2307/3210656. JSTOR  3210656. S2CID  164006022.
  3. ^ Beazley, Elisabeth (1990). Beazley's Design and Detail of the Space Between Buildings. Taylor & Francis. p. 230. ISBN  978-0-419-13620-0.
  4. ^ Porter, Brian; Christopher Tooke (2007). Carpentry and Joinery 3. Butterworth-Heinemann. p. 200. ISBN  978-0-7506-6505-6.

Videos

Youtube | Vimeo | Bing

Websites

Google | Yahoo | Bing

Encyclopedia

Google | Yahoo | Bing

Facebook