Question Box

From Horology magazine, October1939

Question Box

Cleaning Clocks 

Editor Horology, Dear Sirs:
Your magazine has proven invaluable to me, especially the articles on cleaning machines and question box feature, and here is one I would like to have answered.


What method is most satisfactory for ordinary cleaning of alarm clocks? I mean, by this, Big Ben and Baby Ben clocks in particular. Of course, we all know it is not practical to work on cheap, dollar clocks, but the Westclox line is built on repairable standards.


At present I use a naphtha bath for clocks, brushing them thoroughly with a stiff brush. I remove the balance and springs, point the balance pivots, if necessary, and reoil the clock. This method gives fair results, but I would like to know if there is any particular method of cleaning with a solution and rinse as we use on watches.


I have converted a hand drill into a cleaning machine for clocks. After removing the dial and hour wheel, I tighten the chuck of the drill on the center post of the clock and immerse it in the naphtha. Then by turning the drill handle the clock revolves in the naphtha and dislodges all loose dirt and gum. I will be interested to hear what you have to say on this subject and I am sure others will also. We have modern methods in watch cleaning but clocks have been neglected, and a good profit may be realized from alarm and chime clock repairing.

J·W.T.



Answer: Your method calls for little improvement, with the exception of the addition of a higher test gasoline bath for a rinse.

Larger clocks, of course, offer the difficulty of using a large enough jar and cover for keeping the bath. We might also suggest that you prepare a sieve for holding large parts of the better grade clocks which are taken all apart. Your method of using a hand drill for clock cleaning should be a helpful hint to every horologist who is called upon to work on clocks.


The same solutions which are used on watches may be used on some clocks, but due to the fact that many clock plates are lacquered most of the watch solutions are not suitable. For the general run of repairing the method you have described is probably as good as any.