French Patent # 2,573,719 - Simplex

French Patent 2,573,719 - Simplex main image

Here, Henry Juy, the CEO of Simplex, emulates his father, Lucien Juy, who had a penchant for patenting designs that looked suspiciously like those of his main competitors. This, cam-operated, indexed derailleur (with a vaguely ludicrous spring system) is redolant of the Huret Commander (12913) and of the even earlier Bridgestone Synchro Memory Shift. If you can't beat 'em, patent-the-hell outa-them.