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Lesson 3
-- Clock Disassembly 19 Nov 2006
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| Tools Required: Screw Drivers,
Pliers, Tweezers (optional) |
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The mechanism of a clock and that of a watch
are the same. We use a clock to learn the mechanism because
of its bigger size.
This time we only emphasize on the most basic
part of the clock; therefore, the alarm system will be ignored.
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Mechanical Alarm Clock
HK$ 51
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Step 1
Set the alarm to ring until stop in order to release
the power of the alarm.
Unscrew the T-shape handles (red
circle) in the opposite direction as shown (blue
circle). Then open the back cover. clock
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Step 2
Unscrew the knobs and the feet (red
circle) by a pliers. clock
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Step 3
Pull out the "heart" of the clock carefully.
And pull out all the hands carefully with your hands.
clock
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Step 4
Put the clock face down and you can find several metal
plates (red circle).
Use a pliers to make it straight and pull out the face
very carefully.
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Step 5
After remove the face, you can see there is a
big white gear if it did not fall off during step
4. clcok
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Step 6
Pull out the big white gear (Blue
1), there is a small white gear (Red
1).
The parts in blue are parts of the alarm mechanism.
The Red 2 trasfers the
power from the 2nd Wheel (introduced later) to the center
pole - miniute hand.
The Red 1 transfers the
power from the Red 2 with
proper gear ratio to the center pole - hour hand. clock
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Step 7
Pull out the pin (Red circle)
in order to release the balance spring.
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Step 8
Turn the balance wheel (Blue
1) to make the balance spring (Blue
2) coming off the hole and the slit (Red
circle).
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Step 9
Unscrew the screw (Red circle)
and pull out the Balance wheel (Blue
1) very carefully. watch
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Step 10
Unscrew the nuts (Red circle)
a little bit (Not completely) and pull out the Pallet
Fork (Blue 1) carefully.
If you succeed, the power of the main spring will be
released. clcok
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Step 11
Main spring (Red A), Main
spring for the alarm (Blue B).
Unscrew the nuts (Red circle)
and pull out the metal plates.
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Step 12
Alarm mechanism (Blue area)
watch
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Step 13
The main parts of the clock. clock
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Step 14
Main Spring
&
Main Wheel
The main spring stores the power and let the clock
run about 48 hours.
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Step 15
Red 2
2nd wheel
Red 3
3rd wheel
Red 4
4th wheel -- second hand
Red 5
Escape wheel
Red A
Pallet Fork
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2nd Wheel clcok |
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2nd wheel transfers the power to the white
gear and transfer to the center pole to run the miniute
hand. watch |
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Step 16
2nd wheel is removed.
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3rd wheel watch |
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Step 17
3rd wheel is removed.
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4th wheel clock repair |
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Step18
4th wheel is removed.
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Escape wheel watch
repair |
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Pallet Fork
For a watch, there will be two jewels instead
of two metal pins.Except for some cheap
watches.
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Escape wheel, Pallet Fork, Balance Spring and
Balance wheel form the ESCAPEMENT
which controls the time of a clock.
Balance Spring oscillates and Balance Wheel swings
as a result they divide the time.
Pallet Fork and escape wheel control the power
release according to the "divided time".
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