Bay State was a maker of wrenches and other tools, started by Edward Tudor in about 1900. The company was best known for their Autokit wrench sets. this ratchet would probably have been part of a set. Edward Tudor organized another tool company in 1906, The Tudor Manufacturing Co. which absorbed the Bay State company.
The patent description; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis a pawl engaging an externally toothed wheel.
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