Hook

From Wikipedia, the free encyclopedia
Fish hooks are pointed and barbed at one end to aid in catching fish.
A grappling hook has multiple hooks from a central anchor, to increase the chances of catching a part of a surface that the hook can hold.
A hook-and-eye clasp is composed of two pieces that are sewn to clothing, for which one is able to hook around the other.

A hook is a tool consisting of a length of material, typically metal, that contains a portion that is curved/bent back or indented, such that it can be used to grab, connect or in any way attach itself onto another object, allowing traction forces to be relayed through the curved/indented portion to and from the main shaft portion of the hook. In many cases, the far end of the hook is sharply pointed to better pierce 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 ensure that once the hook point is embedded in its target, it cannot be easily pulled back out.

Variations[edit]

Golden pothook pictured in the coat of arms of Jäppilä

References[edit]

  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.