This 30 hour Ogee clock was purchased in the fall of 2017. I was eager to add this clock to my collection as it is the one particular style of clock that I do not have. From my research on Waterbury clocks I determined that it was made in or around 1870.
I decided to turn the worn trundles inward and seal them with Permatex (medium strength thread-locker) so they are fixed rather than rolling; not ideal but reversible
While the case is in remarkable condition for the age of the clock the movement has suffered the ravages of time.
Testing over the course of a day or so revealed that clock would not run for more than a few minutes. The movement was taken out of its case and inspected to determine what needed to be done to get it to running condition.
I expected punch marks and there were a number. In the old days clock-makers would attempt to address pivot wear by closing the pivot holes with a stake or punch. Not ideal but a common practice. Bushing work was definitely required. The pivots, on the other hand, were in very good shape and polished up nicely.
My first task was to address the bushings. Ten bushings were installed, 5 on each plate. The front bushing work included the escape wheel bridge, always a challenging spot to bush. Next I addressed the other serious wear issue – the trundles on all of the lantern pinions.
The trundles on the lantern pinions were in bad shape as you can see in the photo above. The wear seen here was identical on all 4 lantern pinions. Notched trundles were not what I expected.
The trundle work was certainly the most interesting part of the repair. My experience with lantern pinion work is zero. After some research the method I selected was to hand drill through the top shroud to release the worn trundles.
After releasing the worn trundles I used 1.10mm pivot wire which is ideal for this purpose and matched the worn trundles precisely.
I began with the fly. I drilled into the top shroud. I then cut 1.10mm pivot wire into the required lengths then rounded the ends with a cut-off disc on a Dremel. After the fly was completed I addressed two more lantern pinions in the same way. I staked the shroud ends to seal the trundles inside.
With three done the escape wheel lantern pinion was next and that is when I ran into a snag. The escape wheel shroud is reversed (see photo below), so I cannot drill into the top shroud without a lot of guess work. Using needle nose pliers I decided to turn the worn trundles inward and seal them with Permatex (medium strength thread-locker) so they are fixed rather than rolling. This is not ideal but it is reversible.
There does not appear to be a definitive answer as to whether the trundles should be free-moving or fixed although I suppose they are designed to roll with the gear teeth. At some future point the trundles on this wheel will need to be replaced.
The clock did not come with a pendulum bob so, a new one was attached. The suspension spring and leader was replaced to address a crimped spring that resulted in a wobbling pendulum bob. I used .09mm suspension spring in the correct length. The clock now runs well and it has completed a number of 30-hour cycles.
I suspect that this will be a clock that will not be run daily, the inevitable hassle of constantly winding a 30 hour clock but I am pleased that it is back in running order and I will ensure that is runs on special occasions.