John Abraham
From Graces Guide
of Belmont Row, Birmingham, 'machinist'.
1856 Patent sealed: John Abraham, Birmingham, for new or improved machinery for the manufacture of percussion caps, and for cutting out and raising articles metal generally; dated Jan. 16, 1856.[1]
1857 Abraham's wire gauge, patented 17 August 1857, described in The Engineer, 2 April 1858. It was a bench micrometer with two jaws moved by screws having different pitches.
1861 Patent sealed: John Abraham, Birmingham, improvements in brass nails to be used in sheathing ships and for other like purposes - Feb. 4, 1861.[2]
1868 Patent sealed: John Abraham and Thomas R. Bayliss, Birmingham, improvements in central fire cartridges for breech-loading fire-arms. Dated March 20, 1868.[3]
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