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Cyclo Benelux derailleur
An
oldie from 1958 or thereabouts Notwhitstanding the name the gearmech is
British (and a French design) but by British standards the mech is good
and luxuriuos! It is certainly a clever bit of kit. The cage moves by
pulling on the controlchain which slides a pivoting axle against
a spring. The spring is a coilspring which also serves to tension
the chain by winding up the cage. The spring is protected from the
elements by a flat metal spring. Chaintension is adjustable by rotating
the ring with the serrations. The inner bore is hexagonal and you can
push it inwards so it frees the inner nut. The spring pushes the chain
toward the biggest cog, so what we have here is a (Shimano please note)
Top-Normal design. The pulleywheels are steel, run on ballbearings and
are likely original! |
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Cyclo Benelux derailleur 2
Adjustment
is simple. De gekartelde bus waar het kettinkje uitkomt kun je
verdraaien, en daarmee verschuift de geleiding en schroef je de
derailleur onder het grootste tandwiel.
Niet zo goed zichtbaar (pijl) is de schroef waarmee je de
derailleurbody kunt verdraaien om de afstand tussen pignon en bovenste
geleidewieltje in te stellen
Een
aanslag om niet over het kleinste tandwiel te schakelen is er niet,
maar het is niet ongewoon om aan de derailleur te moeten buigen om te
zorgen dat het kleinste tandwiel ueberhaupt gehaald wordt. |
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Cyclo Benelux voorderailleur
Ook
voor treffen we een lineair design aan. Maar met die paar tanden
verschil van de halfstep zijn de prestaties ook niet zo kritisch. Om
voor elkaar te krijgen dat de kooi ver genoeg naar binnen gaat los je
de klemschroef en verschuif je hem over het asje..... |
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Cyclo Benelux voorderailleur 2
Hier
zien we het simpele krukje dat het asje naar buiten duwt. De kooi wordt
geleid met twee ronde asjes (met eentje zou hij net als achter kunnen
verdraaien) en op het onderste asje zit een verstelbaar aanslagmoertje
dat de slag beperkt. |
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Block
chain
Veteran
cycles
are often equipped with a block chain, aka Humber chain. With the chain
depicted here the block bit isn't that clear anymore, with the
earliest
versions the long link was a solid block with 2 pivoltholes. Block plus
link measures 1", ie double the current pitch.
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Chater
Lea
Old
chainrings
usually feature some creative design. |
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Welded
frame
This
is a detail
of an old (20s-30s?) French 650B bike. The main traingle is gaswelded
instead
of brazed, as you might expect. |
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Same
frame, these are the rear dropouts. Note the elegant line of the
wheelslot.
The reinforcment is to deal with the forces of the coasterbrake (with
the
pencilthin chainstays it still wasn't enough) |
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Campagnolo
Cambio Corsa derailleur
One
of the
first (1940-1950) Campagnolo derailleurs, Ergopower is still a long way
of....! With the upper lever you loosen the rearaxle skewer, the lower
lever derails the chain. The upper lever snaps behind a spring, to
facilitate
easy removal in case of a puncture. |
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Campagnolo
derailleur 2
By
swinging
the cage and pedalling backwards you can coax the chain to engage with
the next (Regina) cog. The chain is tensioned by the angle of the
dropouts
and the riders weight. |
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Campagnolo
derailleur 3
The
axle is
splined, as are the dropouts. This ensures that the wheel will not move
to one side and jam in the forks. If you're really good you can do this
without stopping, but on a bumpy road it's quite a job! |
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Thirties
dropbar
Where
have
we seen this shape before? (clue: click here) |
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Resilion
brake
An
English
cantileverbrake from the thirties. Bolts to the frame with a bracket,
and
the special brakecable splits to operate both halves (as shown in the
upper
picture) |
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Chater
Lea headset
If
you provide
all bearings with a Zerk fitting, parts will last a long time. The
bottom
race is lubricated with a fitting on the LH side of the lower
headsetlug
(see above) |
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Who
needs STI? |
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Batavus
bracketshell
The
bracketshell
of this 50 YO Batavus is fitted with a separate sleeve. Sleeve and cups
are both clamped with two bolts through the bracketshell ears.
The
threads
are peculiar too: both sides have RH thread, as far as I can make out
it
is BSC!
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Humber
oilbath chaincase The chaincase is
not absolutely
sealed, but the idea is to have a small quantity of oil sloshing about
to wet the chain. Put the bike on it's side and oil will come out.
Note
the fillerplug/lubricationport
on top
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