3 Speed Freewheel - 1/8 Inch Unknown

sam_white

Diamond Back Fan
Can anyone help to identify what this freewheel is and who it was made by? Information on it is thin on the ground. I can tell you it is for an 1/8" inch chain, it appears to fit onto a simple splined hub. The only marking I can find is 'unscrew' on the back.
The tooth count is as follows: 23-18-15

I bought this as part of a job lot many years ago, the box of jumble also contained a cyclo rear derailleur (pictured). It might be related?




 
It looks like one of those things to fit a Sturmey 3 speed hub and allow derailleur years. I have never seen one off a hub before.
 
The cogs look like Trivelox to me, generally used on tandems pre-war. The cogs slide on the hub to change gear, so keep the chain in line.
The Cyclo Benelux is one of the later ones perhaps 1960s
Keith
 
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bagpuss":4ls4ncql said:
Cyclo made a 3 speed block as did Bayliss Wiley .

Interesting link here .
http://davesbikeblog.squarespace.com/bl ... -time.html

The BW 3 speed was rather like a modern cassette just with 3 sprockets . I did have one somewhere.

Here's a cutaway drawing of the BW hub from 'The Complete Cyclist' handbook.



The sprockets appear to still be separate items screwed onto the hub body rather than a complete unit. And there are 4 of them.
 

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Re:

I used a BW unit hub with a Cyclo 5 speed, a set of cogs screwed on to a sleeve that fitted the standard hub thread.
Main problem was prone to bending the axle, as all the weight was on the centre bearing.

Keith
 
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