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The first locking pliers, with the trade name Vise-Grip, were invented by William S. Petersen in De Witt, Nebraska, United States in 1924. [ 1 ] [ 2 ] Later, in 1955, in the United Kingdom, M K Mole and Son, a hand tool manufacturing company, under the managing direction of Thomas Coughtrie , began making nearly identical pliers.
Mole branded Self-grip wrench locking pliers. Thomas Robb Coughtrie (25 November 1917 – 27 August 2008) was a chartered engineer from Motherwell, Lanarkshire, Scotland.. He was credited by The Times as the inventor of the self-grip Mole wrench [1] although this conflicts with other sources which show the invention of the Vise-Grip locking pliers [2] in Nebraska, United States, with an ...
Parallel pliers have jaws that close in parallel to each other, as opposed to the scissor-type action of traditional pliers. They use a box joint system to do this, and it allows them to generate more grip from friction on square and hexagonal fastenings. [2] There are many kinds of pliers made for various general and specific purposes.
The company's founder William Burke Belknap the elder (1811–1884) was born in Brimfield, Massachusetts, the son of Morris Burke Belknap the elder (1780–1877) and Phoebe Locke Thompson Belknap (1788–1873) and is not to be confused with William Burke Belknap the younger (1885–1965) or William Burke Belknap Jr.
The lower jaw can be moved to a number of positions by sliding along a tracking section under the upper jaw. An advantage of this design is that the pliers can adjust to a number of sizes without the distance in the handle growing wider. These pliers often have long handles—commonly 240 to 300 mm (9.5 to 12 inches) long—for increased leverage.
Whoever wins the Cotton Bowl on Friday night will be the favorite to win the College Football Playoff National Championship Game on Jan. 20. Here's what you need to know ahead of the big showdown ...
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