21st October 1930, Page 74
21st October 1930
Page 74

Page 74, 21st October 1930
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Free Wheel Published Patent Specifications A Free Wheel...
some novel features is described in patent No. 334,992, by J. Mains, of 8, Grosvenor Gardens, London, S.W.1. The driving shaft (A) is provided with a bell-shaped portion (B),......