André Galle
1761
—
1844
French sculptor and engraver (1761-1844)
André Galle was a French engraver and medallist. In 1829, he patented a type of roller chain, known as a leaf chain, which is still used for low-speed, heavy duty applications. It was not put into production during his lifetime.
![Inscription [reverse]](https://upload.wikimedia.org/wikipedia/commons/thumb/c/c8/André_Galle%2C_Inscription_(reverse)%2C_1820%2C_NGA_162052.jpg/500px-André_Galle%2C_Inscription_(reverse)%2C_1820%2C_NGA_162052.jpg)
![Jacques-Louis David, 1748-1825, Painter [obverse]](https://upload.wikimedia.org/wikipedia/commons/thumb/d/d5/André_Galle%2C_Jacques-Louis_David%2C_1748-1825%2C_Painter_(obverse)%2C_1820%2C_NGA_160857.jpg/500px-André_Galle%2C_Jacques-Louis_David%2C_1748-1825%2C_Painter_(obverse)%2C_1820%2C_NGA_160857.jpg)
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