BARLOW, SAMUEL . - A Victorian Grant Of Patent, on vellum, No. 1447, for Samuel Barlow relating to an invention for "Improvements In Apparatus For The Prevention Of Accidents Upon Railways".

London: April 1872 . 0. Folded vellum document with wax seal within a tin. 20.75" x 30.5" . Large heavy circular yellow wax seal for Queen Victoria, 6.5" in diameter. VG . ** "..The Invention is designed for the purpose of preventing the possibility of the occurrence of any accident from one train following another too closely, and will act as an automatic " block system " to prevent any train or engine from passing a given point until the preceding one has passed a given distance in advance. The Invention will also stop both parts of a train in the event of a coupling breaking.." - See: English Patents of Inventions, Specifications 1872, 1104 - 1165.

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