Old House Journal – September 2019

(Marcin) #1

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eight-day clock should be wound once a week, as the main-
spring loses power after seven days. A 30-hour clock should
be wound daily; a good routine is to wind it every night before
bedtime. The key should fi t tightly. If it is loose, slipping can
occur during winding and the ratchets will not seat properly,
potentially causing a sudden unwinding of the mainsprings.
Adjusting the time is straightforward. Lengthening the
pendulum slows down the clock; shortening it makes the
clock run faster. Remember to always turn the hands clock-
wise, never counterclockwise, to set the time, so as not to
bend or break strike- mechanism levers.

WHEN BUYING AN OLD CLOCK
The vintage-clock market is pretty big.
Keep in mind these shopping pointers:

-^ Wind the clock to be sure it runs and chimes
correctly. Move the minute hand slowly to the
hour and half hour dial positions for chiming.
-^ Make sure all the case and movement
parts are present. Missing pendulums
and weights may be hard to fi nd, and
replacement parts may devalue the clock.



  • Beware of fakes! Some rare clocks, such as
    the French industrial clocks of the 1880s and
    1890s, are being reproduced in China. They don’t
    have the value (or quality) of the originals.
    -^ Find out when the clock was last serviced; if the
    seller doesn’t know, then don’t run the clock until
    it has been serviced. Cracks and tears can occur
    in the mainsprings, causing them to break when
    wound. A sudden mainspring break can destroy gear
    teeth and damage the movement, and you end up
    with a repair bill greater than the cost of the clock.

  • Make sure the dealer has a return policy. If
    the clock turns out to need expensive repairs or
    is not as advertised, you may want to return it.


A collection of spare parts includes gears, keys, pendulums, and hands.
Free download pdf