David Brooks (Inventor)
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. David Brooks was an Philadelphia, Pennsylvania inventor, remembered for an innovative insulator for telegraph lines in 1864 and 1867. He patented it while working for the Central Pacific Railroad. His patents allowed the railroad to more easily communicate with construction crews building the first transcontinental railroad in America. The insulator had a thick metal casing around blown glass; the assembly was held together with molten sulfur. Out of the tube extends…mehr

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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. David Brooks was an Philadelphia, Pennsylvania inventor, remembered for an innovative insulator for telegraph lines in 1864 and 1867. He patented it while working for the Central Pacific Railroad. His patents allowed the railroad to more easily communicate with construction crews building the first transcontinental railroad in America. The insulator had a thick metal casing around blown glass; the assembly was held together with molten sulfur. Out of the tube extends a "ramshorn" rod that held the telegraph wires. It was mounted into holes drilled into the bottom of wooden crossarms attached to poles.