> With the bicycle the Wright Brothers patented the left-hand thread. I tried to verify that a couple of years ago, at https://news.ycombinator.com/item?id=427

> With the bicycle the Wright Brothers patented the left-hand thread. I tried to verify that a couple of years ago, at https://news.ycombinator.com/item?id=42709428 https://news.ycombinator.com/item?id=42709428 . It does not seem to be true. https://www.wright-brothers.org/Information_Desk/Just_the_Facts/Bicycles/Wright_Bicycles.htm https://www.wright-brothers.org/Information_Desk/Just_the_Fa... says "Wilbur and Orville were in the vanguard of those manufacturers that offered right-hand threads on one crank arm and left-hand threads on the other" but not the inventors. I was also able to find earlier uses of left-handed threads for bicycles, like in this 1881 book, at https://archive.org/details/indispensablebic00stur/page/14/mode/2up?q=%22left-handed%22 https://archive.org/details/indispensablebic00stur/page/14/m... "The Centaur Crank is first screwed up to a shoulder on the axle with right and left-handed threads, so that the pressure of the foot tends to make it all the more secure ; whilst, to prevent its loosening by “ back-pedalling,” a slightly tapered conical pin is driven through both crank and axle, and secured with a nut." Do you know the patent number? I searched the USPTO but found no bicycle related patent by either of the Wright brothers.