Author Archives: Dave T

Clock Repair Archive – –     The sessions westminster chime mechanism with only 2 mainsprings can be recognized by the silver colored large hammer lift assembly on the back plate that is quite obvious when you open the back door. … Continue reading →

Clock Repair Archive – –    The pendulum length is 6.5 inches from regulator tab to the bottom of the pendulum bob plus 3/8 inch travel on the regulator ( the total effective length when the clock is keeping time … Continue reading →

Clock Repair Archive – –      SAW CLOCK (RACK CLOCK) The saw clock has a face and case that slide down the saw or rack as it runs. The case is very heavy and is made of cast metal. … Continue reading →

Clock Repair Archive – – Repivoting skills are a must. The only way to become proficient at this is practice; lots of practice. Accuracy to within +- .0005in. is absolutely necessary if repivoting jobs in clock repair are to be … Continue reading →

Clock Repair Archive – –       QUAIL CUCKOO CLOCKS: Quail cuckoos are quite involved and can be very challenging repair items. Have a test rack set up to run and observe them on. Spend a siginficant amount of … Continue reading →

Clock Repair Archive – –      To calculate the required length for a pendulum you can use this formula:  where Li is the incorrect length, L is the correct length, E is the error in timekeeping, and R is … Continue reading →

Clock Repair Archive – –      mainsprings:The mainspring is the heart of the timekeeping of any spring drive clock. If the mainspring is not oiled properly the clock will not work. The oil that is used is absolutely critical … Continue reading →

Clock Repair Archive – –     New Haven mainsprings:  new haven time and strike: back to top The New Haven time and strike mechanism (standard design ) mainspring measurements : Time: .0175 inches strong by 3/4 inches wide by 96 … Continue reading →

Clock Repair Archive – –    Most barrel caps are friction fit into the barrel. Installing a barrel cap on a mainspring barrel can be a frustrating experience if the cap does not fit snugly. Here is one way to … Continue reading →

Clock Repair Archive – –      popular european (Hermle) mechanism mainspring specs in inches ( LISTED width X strength X length): #10 — .669X .0177 X 58.6 #11 — .669 X .0157 X 47.25 #20 — .669 X .015 … Continue reading →