The second BW patent is likely GB514931, which relates to a spindle (or axle) and the double sided bearing for such hub.
Joe Bender-Zanoni
Great Notch, NJ
> I have two Bayliss Wiley Unit hubs: the early low flange version,
\r?\n> and a NOS
\r?\n> post-war large flange model. I also have a Cyclo "Tank" Unit hub.
\r?\n> Please
\r?\n> see the photo on:
\r?\n>
\r?\n> http://photobucket.com/
\r?\n>
\r?\n> and in the following sub-albums accessible from that page: "BW LF
\r?\n> UNIT HUB",
\r?\n> "BW SF UNIT HUB" and "CYCLO UNIT HUB"
\r?\n>
\r?\n> The Bayliss Wiley Unit Hub patent (number GB461951) was published
\r?\n> on 26th
\r?\n> February, 1937. For full patent details, including drawings, see:
\r?\n>
\r?\n> http://v3.espacenet.com/
\r?\n>
\r?\n> The BW small flange Unit hub is marked with this patent. The later
\r?\n> large
\r?\n> flange BW Unit hub in the photos is marked "Patent Applied For",
\r?\n> but I have
\r?\n> been unable to find any patent having been granted for this model,
\r?\n> and I
\r?\n> don't know what the specific patent claims were If you compare
\r?\n> the photos
\r?\n> of the large and small flange BW hubs, you will see a marked
\r?\n> difference in
\r?\n> the size of the bearing housings, but what the actu8al changes
\r?\n> were, I don't
\r?\n> know - I haven't stripped any of the hubs (which is probably why
\r?\n> they're
\r?\n> still working).
\r?\n>
\r?\n> The Cyclo Unit hub is marked in French with the Cyclo logo and
\r?\n> "BREVETE
\r?\n> SGDG" on the barrel, and the Cyclo logo and "SGDG" and "TANK
\r?\n> BREVETE" on the
\r?\n> adjustable bearing cone. I bought this on eBay from France, hence
\r?\n> the
\r?\n> French markings, but it has 40 spoke holes (as do the BW hubs)
\r?\n> which I
\r?\n> understand to be unusual for the French market, 36 holes being much
\r?\n> more
\r?\n> common. (My hub does not have the eyeletted spoke holes on the
\r?\n> freewheel
\r?\n> side flange which are specified in the 1939 Cyclo catalogue).
\r?\n>
\r?\n> Perhaps they were made in England and exported to France via French
\r?\n> Cyclo,
\r?\n> and stamped accordingly? The reason I believe that this might be
\r?\n> the case
\r?\n> is that the 1939 catalogue states that these hubs were "Made under
\r?\n> BSA
\r?\n> license (sic), Patent No. 498931". For details of this patent,
\r?\n> which was
\r?\n> published on 17th January 1939, see:
\r?\n>
\r?\n> http://v3.espacenet.com/
\r?\n>
\r?\n> My hub appears externally similar to the hub in the BSA patent
\r?\n> drawings,
\r?\n> although it only steps down once from the flange to the barrel,
\r?\n> unlike the
\r?\n> hub in the patent drawings and the exploded diagram in the 1939
\r?\n> Ccyclo
\r?\n> catalogue (and, come to that, the BW hubs). However, if it IS the
\r?\n> BSA
\r?\n> patent hub, then I think it more likely, particularly in view of
\r?\n> the
\r?\n> 40-hole spoking, that was British made, and exported. It doesn't
\r?\n> seem
\r?\n> likely to me that both British and French Cyclo factories would go
\r?\n> to the
\r?\n> expense of tooling up to make the same pattern of hub.
\r?\n>
\r?\n> However, this is all conjecture on my part - it's just as possible
\r?\n> that it
\r?\n> was made in France, and distributed in the UK by British Cyclo.
\r?\n>
\r?\n> It is a "flip flop" (fixed/free) hub, and the BW Unit hub was also
\r?\n> available
\r?\n> fixed/free - it is listed in the 1939 Brown Bothers catalogue as
\r?\n> being
\r?\n> available in 4 configurations:
\r?\n>
\r?\n> Single freewheel
\r?\n> Single freewheel/fixed
\r?\n> Three speed
\r?\n> Three speed/ fixed
\r?\n>
\r?\n> The only options listed in the 1950 Cyclo catalogue relate to 3, 4
\r?\n> or 5
\r?\n> speed, and by this time, it appears that Cyclo had dropped the BSA-
\r?\n> licensed
\r?\n> model, and were using the Bayliss Wiley Unit hub - if you refer to
\r?\n> the 1950
\r?\n> catalogue page, you will see it listed as "B.W. FREEWHEEL HUB
\r?\n> UNIT", but
\r?\n> referred to in the description as "CYCLO unit". The illustration
\r?\n> is of the
\r?\n> large flange BW hub.
\r?\n>
\r?\n> A couple of general points - the teeth on the sprockets supplied
\r?\n> for the BW
\r?\n> hubs were flat-topped. The1939 Brown Brothers catalogue states
\r?\n> that
\r?\n> standard hub sprockets (I assume that this means fixed sprockets)
\r?\n> will fit,
\r?\n> but will NOT work satisfactorily with derailleur gears. This seems
\r?\n> strange,
\r?\n> because Cyclo and Trivelox were supplying three speed blocks with
\r?\n> pointed
\r?\n> teeth, like those of a fixed sprocket, at that time, and in my
\r?\n> experience,
\r?\n> they work fine. I haven't yet tried a BW Unit hub with fixed
\r?\n> sprockets, but
\r?\n> I guess maybe Mick or Doug have? I suspect that this was a
\r?\n> marketing ploy
\r?\n> on the part of BW.
\r?\n>
\r?\n> Both the BW and Cyclo unit hubs were listed in the 1952 Brown
\r?\n> Brothers
\r?\n> catalogue, although the BW illustration is of the small flange hub,
\r?\n> and the
\r?\n> Cyclo illustration is of the large flange BW! Neither appears in
\r?\n> the 1956
\r?\n> edition. The BW hub is also listed in the 1952 Hobday Bros
\r?\n> Catalogue (with
\r?\n> the large flange hub illustrated) but it doesn't appear in the 1954
\r?\n> edition.
\r?\n>
\r?\n> Neil Foddering
\r?\n> Weymouth, England