DISRAELI DOCUMENTS

UK Patent 1899 # 18,240

UK Patent 1899 18,240 - Whippet New Protean main image

The New Protean gear, described in this patent, had nearly all the attributes of the fork derailleurs that dominated that 1930s - and what’s more it appears that it worked quite well.

But that’s a funky half-moon shaped chain.


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