Over the weekend I bought a Barr Battery clock. Nice cyclender pend. No battery damage. But the clock acts like it's out of beat. The movement acts like it's out of "time" (no phun intented) When the electrical part impulses the pend is not where it should be to recive that impulse to keep running. Can anyone tell me (or have diagrams) on how these clocks work and how to adjust them to run correctly?