On Saturday, 20 January 2018 00:22:11 UTC, Dave W wrote:
On 19/01/2018 04:51, tabbypurr wrote:
On Friday, 19 January 2018 04:47:06 UTC, tabby wrote:


I have a 1 transistor balance wheel clock that gains 5 minutes a day. Repeated adjustment over about 3 turns so far of the speed adjusting screw has made no noticeable difference. I can't tell which way the threads run on the screw, and thus which way I should be turning it, it's gone anticlockwise about 3 turns.

If all else fails I can always add weight to the wheel, but this ought to be solvable a lot more easily & elegantly. What am I missing here?

http://i63.tinypic.com/2a8i35i.jpg

There isn't a speed adjusting screw - you must be loosening the pivot
screw which has a conical hole in the end in which runs the pointed
shaft of the balance wheel. Any more turns and the wheel will fall out.

very funny

Speed is adjusted by moving the lever that has a slot constraining the
spring. Move the lever to lengthen the length of moving spring to slow
the balance.

and that spring restrainer is adjusted by a screw.


NT