Datamp.org Patents http://www.datamp.org/ Recently added patents en-us GB Patent: 184,300,040 http://www.datamp.org/patents/displayPatent.php?id=59403&pn=184,300,040 Improved simple and compound parallel vise Patentee: Alexander Stiven - Manchester England Granted:1843-02-19

The 1853-08-06 American Railroad Journal lists exhibitors at the Crystal Palace in London, including "John Mason of Rocbdale has one 120 spindle Roving frame, to run 1250 turns per minute ; a 72 spindle Slubbing frame to run 800 turns per minute; also a large scroll screw chuck and an improved vice, of Stiven's patent." Apparently Stiven moved to New York by 1845 and was advertising "Stiven's patent parallel vice".
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