Glad to see you are progressing in your quest!
LWaB is obviously correct.
James also made motorcycles too, (if it is the same company) and it may be useful to research James.

But, on the subject of chain-wheels, here's a cautionary tale:
Last night I saw that this New Hudson - badged as such - on ebay, has a Hercules chain-wheel when you look closely.

http://cgi.ebay.co.uk/ws/eBayISAPI.d...:X:RTQ:GB:1123

Moral?
Not sure except, be wary and sceptical.