Leo Lichtman said:
<[email hidden]> wrote: --(clip)it looked like 36 spokes, but there
were still only 12 brass
Quoted message said:dinguses when 18 would be needed to tie-and-solder three dozen spokes.
(clip)
^^^^^^^^^^^^^^^^^^
Fascinating. It looks like there are 24 full-length spokes, joined in pairs
near the hub by these brass disks. Each disk adds a shorter third spoke to
the pair. (The third spoke does not go to the hub.) Is there some way that
the third spoke adds tension to the other two? It seems to me it is pulling
the wrong way to do that. Another question: why are the brass disks not
evenly spaced?
Dear Leo,
I have no idea what the design is supposed to do.
I think that the brass (?) disks are actually evenly spaced, but the
camera angle makes them look a little asymmetrical, just as even the
faint camera angle in other photos often makes it hard to tell at a
glance whether an antique wheel is radial or cross-laced.
In this photo, it's hard to tell whehter a disk is on the near or the
far side of the wheel, leading to optical illusions.
Things are further confused by the lines of the upper and lower chain,
the chainstays, the faint pinstripes on the chainstays, the four
fender stays, and the weird pair of lower cross-frame wire struts.
Look very carefully at the four silver fender stays to see how the
camera angle distorts perfectly symmetrical things.
There were at least two similar spoke-fans back then. Here's a huge
example, the 1882 Oldreive thing-a-ma-bob:
http://www.imageenvision.com/photo/0003-0702-1421-0815.html
http://www.elektrischkite.com/Bicycle/Womens/Assets/oldreive_trike.gif
In the Oldreive contraption, the fanned-out spokes served a practical
purpose, namely leaving enough room for the rider to climb inside the
wheel, but they fan out from a single spoke attached to the hub.
Here's a 1887 patent illustration of a 2x3 fan on a highwheeler:
http://books.google.com/books?id=rZQ1AAAAMAAJ&printsec=frontcover&dq=cycling+art+energy+locomotion&as_brr=1&ei=5VotR-XvL5SysgOdjbS6CQ#PPA298,M1
Regrettably, Charles Duryea wrote in his patent 364231 that "the
structure of the hub, spokes, and rim will not be claimed in this
case, as they will form the subject of another application by me for
patent thereon."
http://patimg1.uspto.gov/.piw?docid=US000364231&PageNum=3&IDKey=6CAD66CE3B50&HomeUrl=http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1%2526Sect2=HITOFF%2526d=PALL%2526p=1%2526u=%25252Fnetahtml%25252FPTO%25252Fsrchnum.htm%2526r=1%2526f=G%2526l=50%2526s1=0364231.PN.%2526OS=PN/0364231%2526RS=PN/0364231
You can't search patents that old except by number, so I don't know if
Duryea ever did file a patent application that explained what the hell
his 2x3 fan-spoke design was supposed to do. He abandoned bicycles and
became an early car builder:
http://en.wikipedia.org/wiki/Charles_Duryea
Charles was born during the Civil War in 1862, patented his
highwheeler breakaway handlebars at 25 in 1887, and died at 76 in
1938.
His brother, Frank, was born in 1869, worked with him in their car
business before the turn of the century, and died at 98 in 1967.
I'm always interested in such long-lived types, since one of my
grandfathers was born in 1888, shot rabbits as a boy in what is now
Beverly Hills, visited France as an armed tourist in 1918, and died
just short of 102, having seen the Wright brothers' invention turn
into the 747.
Cheers,
Carl Fogel