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Some locking pliers have a lever (on lower arm, right) to aid release from the locked position. The first locking pliers, with the trade name Vise-Grip, were invented by William S. Petersen in De Witt, Nebraska, United States in 1924.
Upper row: F-clamp or bar clamp, one-handed bar clamp ("Quick Grip"), wooden handscrew; Lower row: spring clamp, C-clamp (G-clamp ), wooden cam clamp. A clamp is a fastening device used to hold or secure objects tightly together to prevent movement or separation through the application of inward pressure.
Two double-end adjustable tap wrenches and a T-handle tap wrench. There are two main types of tap wrenches: double-end adjustable wrenches and T-handle wrenches. Double-end adjustable wrenches, also known as bar wrenches, have one threaded handle which is attached to one of the clamps. The clamp is opened to insert the tool and then tightened ...
The toggle positions are determined by the colinearity of two of the moving links. [19] The linkage is dimensioned so that the linkage reaches a toggle position just before it folds. The high mechanical advantage allows the input crank to deform the linkage just enough to push it beyond the toggle position. This locks the input in place.
A clamp holder or clamp fastener is a piece of laboratory apparatus that is used to secure laboratory clamps, such as extension-type utility clamps, or other attachments to a retort stand or lab frame. [1] The material can be made up of brass, cast iron, stainless steel, aluminium or nickel-plated zinc. [2]
An F-clamp consists of two horizontal bars joined together by a vertical bar. This gives the clamp an appearance of the letter F. There is a large screw on the lower bar to allow for the clamp to be tightened. [1] F-clamps are adjustable, which allows for them to be used on larger scale objects without the need for a large screw.
An adjustable spanner (UK and most other English-speaking countries), also called a shifting spanner (Australia and New Zealand) [1] or adjustable wrench (US and Canada), [a] is any of various styles of spanner (wrench) with a movable jaw, allowing it to be used with different sizes of fastener head (nut, bolt, etc.) rather than just one fastener size, as with a conventional fixed spanner.
Originally developed as a blacksmiths tool, patented in 1899 Canada under CA64246A [4] by Vernon Graham Higgins and sold out of Fortuna, California by the patentee. . Advertised in the November 1899 issue of "The Blacksmith and Wheelwright", [5] an American periodical; the original variants had longer reins than the modern equivalent, and may not have had the groves in
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