Hi Bepi, that is a great experiment. If I understand it, it seems that if you put a flag, (Cardboard, plastic etc) on the end of the pendulum then the interupt time would be greater and some of the me

A vacuum around a pendulum is not all good. In all practical tank clocks there is a technician who has to regularly check the vacuum and pump it down to the mark. The clocks seldom attempted a hard va

Hi, conventional wisdom had a dewar flask as the best insulated enclosure as the vacuum did not conduct, and the silvered side had very low emmissivity to reduce radiation. But there may be a new tech

It could be that the battery is an alkaline electrolyte battery and the electrolyte is creeping out. It will spread over printed circuit tracks and along multi- or even single strand cables. When the

Vibration of the pendulum rod should not be a problem if it has completely died out by the time the pendulum is next impulsed. A pendulum has one resonant frequency, the rate at which it beats. You co

It is quite clear from various set up instructions and clock theory that if the pendulum is stationary, the roller should be half way down the slope. This is how you set the suspension spring at the t

As an earthquake, and the various aftershocks, are transient events, it should be practical to take some data before and after the event to determine the incremental phase shift to correct your long t

I think that Airy’s Tangent Rule is another phenomenon from optics, but "Airy’s condition for pendulum maintenance", (Camb. Phil. Soc. 1827, iii 105) is that the impulse phase components at the pendul

I have done a lot of work with barometric pressure with respect to caves. Caves are often a large volume which equilibrates with surface pressure with huge volumes of air flow. When a wind is blowing,

The Littlemore clock, by E.T.Hall is documented in Derek Roberts’ book: Precision Pendulum Clocks: France, Germany, America and recent advancements. In this article the author blames a chestnut tree f

The phase of the impulse can be adjusted by moving the pendulum sideways with the adjustment above the suspension. I seem to remember instructions for adjusting this so the roller was halfway down the

If you were prepared to make a serious task out of the experiment, you could add a horizontal bar with an adjustable weight, to displace the pendulum zero position. The escapement would stay the same,

Hi Stephen, Could you tell me the serial number of your Synchronome? I have one with an identical latch, but it must have been sold as a bare movement, because it was re-cased and has no serial number

Hi Neil, I have often thought about the problem of fixing a glass rod in a pendulum. Some of the adhesives are very good, but there is always the possibility of creep and the effects of moisture absor

Somewhere in the past I recall reading of a Eureka that had lead washers under its screws. That clock had been messed about, but it is a hint as to how you could improve the situation without having t

Hi Naing, I have an early Synchronome with an obscure history. It has without doubt been made in the Synchronome factory, but was probably sold as the movement alone. It has no serial number. It has b

Hi Naing The clock being discussed has a latch and fittings that place it about 1917. I base this on other clocks with the previous model latch and the later latch that followed. None of these clocks