for a pic of this, see
http://www.blackbirdsf.org/
double pivot. hah! you could have *triple* pivot brakes! :)
-joel
>There were many fascinating brakes in the 1930s. I can speak only
>about the French ones: Lefol (the fender people) made one that had a
>caliper at the top, but which spread instead of pinced the brake.
>This was connected at the bottom on each side to a short lever arm
>that rotated around a brazed-on pivot on the fork (roughly were a
>centerpull pivot would be). At the bottom of the lever arm, the
>brake pad was pressed onto the rim. The lever basically translated
>the outward movement of the caliper into an inward movement of the
>brake pad. The advantage was that you could get huge clearance
>without lengthening the lever arm and thus reducing braking power.
>Neat design, it's on an Hurtu tandem that is featured in the
>upcoming issue of VBQ (off the press today).
--
joel metz : magpie@messengers.org : http://www.blackbirdsf.org/
bike messengers worldwide : ifbma : http://www.messengers.org/
po box 191443 san francisco california 94119-1443 usa
==
i know what innocence looks like - and it wasn't there,
after she got that bicycle...