Thoughts of replicating a TriVelox 'A' type rear derailleur/hub hybrid
01-01-15, 07:29 PM
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^^ I love those old semi-technical drawings. It just amazes me what those guys did with pen and ink.
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01-02-15, 11:55 AM
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Found a link and close-up of a Trivelox having the shift cable on drive side, unlike the advert one posted. Curious of the substantial 3 wheel chain tensioner. My thought was just using a single Simplex (2 bolt mount on chainstay) but perhaps that will be too flexy.
01-02-15, 03:42 PM
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Here's a link to a page from a "James Arrow Ace Convertible Touring Tadem." Trivalex was the standard on this, but mine had already been replaced by a suntour 5 speed when I got it.
https://flic.kr/p/enZ5hP
https://flic.kr/p/enZ5hP
01-03-15, 11:06 AM
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Update. today I finished up making a gear cable for the tandem and the gears do work! at-least while on the stand---We'll see if it will shifts as smooth when under power
02-01-15, 03:09 PM
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Courtesy of Disraeli Gears, found this French Audouard interesting. Patent date of 1911 and the advert 1914. The two cables, one on each end of the hollow axle, simply operate in a pull action. There must have been a slot thru the hub for a dog to move a sliding cogset. In this case, a four speed. I can't figure how that tensioner cooperated. Must have been tough on the jockey swing arm.
Last edited by crank_addict; 02-01-15 at 03:16 PM.
05-04-15, 09:29 AM
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(no connection to seller, not mine and only posted for special interest)
Two versions of the Trivelox, NOS on fleabay right now. Amazing survivors-
Type A
Trivelox Hub Derailleur Kit 3 Speed Model A 1930 40's Vintage Road Bike | eBay
Type B
Trivelox Hub Derailleur Kit 3 Speed Model B 1930 40's Vintage Road Bike | eBay
Two versions of the Trivelox, NOS on fleabay right now. Amazing survivors-
Type A
Trivelox Hub Derailleur Kit 3 Speed Model A 1930 40's Vintage Road Bike | eBay
Type B
Trivelox Hub Derailleur Kit 3 Speed Model B 1930 40's Vintage Road Bike | eBay
05-04-15, 09:44 AM
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Cool gear! Uncool price. I'd guess the stuff is worth around 15% of the 'sale price.'
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