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Socket set with ratchet (above), four hex sockets and a universal joint. A socket wrench (or socket spanner) is a type of spanner (or wrench [1] in North American English) that uses a closed socket format, rather than a typical open wrench/spanner to turn a fastener, typically in the form of a nut or bolt.
Craftsman is a line of tools, lawn and garden equipment, and work wear.Originally a house brand established by Sears, the brand is now owned by Stanley Black & Decker.. As with all Sears products, Craftsman tools were not manufactured by Sears during the company's ownership, but made under contract by various other companies.
Easco continued the Craftsman contract with Sears. By 1969, the parent company was known as Easco Corporation. [1] Tools made by MDF for Sears have a "V" maker's mark on them, those by Danaher had a "V^" (V and upside down V, sometimes a right-side up V). Variations of the "VV" exist including three digit codes on tools such as ratchets.
The term universal joint was used in the 18th century [10] and was in common use in the 19th century. Edmund Morewood's 1844 patent for a metal coating machine called for a universal joint, by that name, to accommodate small alignment errors between the engine and rolling mill shafts. [14]
With the encouragement of his instructor, Dean Robert H. Thurston, Spicer applied for and received a patent for a practical automotive universal joint on May 19, 1903. Thurston died on October 25, 1903, and without a mentor, Spicer decided to leave Cornell during his last semester of school and start the manufacture of his universal joint ...
Crude versions of conically tapered ground glass joints have been made for quite a while, [1] particularly for stoppers for glass bottles and retorts. [2] Crude glass joints could still be made to seal well by grinding the two parts of a joint against each other using an abrasive grit, but this led to variations between joints and they would not seal well if mated to a different joint.