On Mon, 13 Jun 2005 18:42:38 +0100, "Peter Stockdale"
wrote:

I have an old (Victorian) pendulum spring wall clock. I finally got it to
keep good(ish) time by adjusting the pendulum length.
Recently it has taking to losing 11 minutes then it continues merrily on
its way not losing any more. It's always ~11 minutes (ie not 8 or 13). If
I
reset it, it will sooner or later do the same thing.
Any ideas?
--
Jim on Tyneside UK


There is clearly a case for setting the clock 11 mins fast - when it will
take to losing 11 mins.
When it continues on its merry way not losing any more - the clock will be
showing the correct time.
My idea !

Yes - this appears to be 11 mins backlash in the mechanism. The
pendulum timing seems to be OK, but 11 mins is being taken up by
(probably) wear in the "cogs"!

--
Frank Erskine
Sunderland