Benjamin Chew Tilghman - Invention of The Sandblasting Process

Invention of The Sandblasting Process

Legend has it that Tilghman had seen the effect of wind-blown sand on windows in the desert while a general in the army, and that this was the basis of his sandblasting invention.

Around 1870, he invented the Sandblasting process and filed a patent for it in the U.S. (US patent 104,408), detailing many of the applications for which this technique is uniquely suited, such as sharpening files, engraving bottles, cleaning boilers or bringing out the grain in wood. Later that year a patent was issued in the UK.

In 1871, at the 40th Exhibition of the American Institute of the City of New York, he was awarded the institute's Great Medal of Honor for his invention; shortly after, he was also awarded the Elliott Cresson Medal by the Franklin Institute.

He refined the technique for various purposes, and in 1877 took out a patent (US patent 252,279) for sharpening files, which he marketed as "Liquid Grindstone".

Further patents and developments followed.

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