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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.
Johan Petter Johansson (December 12, 1853 – August 25, 1943), sometimes known as JP, was a Swedish inventor and industrialist.He invented a modern adjustable spanner [1] (patents in 1891 and 11 May 1892).
He was born March 25, 1826, in Durham, New Hampshire.He was the son of William Stillson and Nancy Chapman. He married Ellen Raynes Davis on April 18, 1855. [1]He was a machinist during the American Civil War and served on David Glasgow Farragut ' s first voyage as a vice admiral.
Harbor Freight Tools, commonly referred to as Harbor Freight, is an American privately held tool and equipment retailer, headquartered in Calabasas, California. It operates a chain of retail stores, as well as an e-commerce business. The company employs over 28,000 people in the United States, [5] and has over 1,500 locations in 48 states. [6] [7]
The first products that were developed according to ergonomic principles were the screwdrivers (1983), the adjustable wrenches (1984), wood chisels (1985) and slip-joint pliers (1986). In 1996, the Bahco Ergo concept was presented and scientifically approved as a way of preventing repetitive strain injuries and to increase productivity.
In 1882, James Harvey Williams and Matthew Diamond founded Williams & Diamond in Flushing, Queens, a drop forging business. [2] The business was relocated to Brooklyn in 1884 and took the name J.H. Williams & Co in 1887.