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A ratchet consists of a round gear or a linear rack with teeth, and a pivoting, spring-loaded finger called a pawl (or click, in clocks and watches [1] [2]) that engages the teeth. The teeth are uniform but are usually asymmetrical, with each tooth having a moderate slope on one edge and a much steeper slope on the other edge.
Theodore Rueb, an engineer for the Sherman-Klove Company, went on to develop a new mechanism for a very successful line of ratchets, scaled from 1/4-inch drive up to 3/4-inch drive. The "round-head" ratchet has remained one of the most popular ratchet styles in the nearly nine decades since S-K's first development, and many modern ratchets are ...
In 1923, the company moved again to a 33,000-square-foot (3,100 m 2) facility at its current location in Meadville. Four years later, the name of the company was changed to the Champion–DeArment Tool Company. [1] In 1933, Chief Engineer Howard Manning developed the tongue-and-groove, slip-joint pliers for which the company is known.
On July 11, 1938, the firm was incorporated in Ohio, and common stock was issued. [2] Mac Tools continued to grow in the 1940s, with a large government contract received in 1942. The company's name was changed in 1963 to the now familiar Mac Tools from its earlier name, Mechanics Tool and Forge Company.
The North Brothers Manufacturing Company (North Bros. Mfg. Co. or more simply North Bros.) was an American manufacturer based in Philadelphia, Pennsylvania that specialized in the making of hand tools, small appliances and some specialized power tools.
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. [2] The most prevalent form is the ratcheting socket wrench, often informally called a ratchet.
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