Hairspring Vibrator
Overall rating: (N/A)
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Locates vibraitng point (point at which length of spring is
such as to cause attached balance wheel to oscillate at
specified rate) on clock and watch hairsprings and cuts
hairspring at specified point to synchronize oscillation of
movements, utilizing one or both of following methods: (1)
Fastens free end of spring of hairspring assembly in fixture of
electronic vibrating device, and adjusts bed of device until it
touches pivot of vertically oscillating balance wheel, as
indicated on cathode-ray tube.
Observes sceond cathode-ray tube
to determine excess length of spring as vertical swings are
translated into corresponding horizontal oscillations. Winds
excess length of spring into holding fixture of device and
readjusts bed until cathode-ray tube readings are within
acceptable limits.
Starts shears to cut excess spring at
specified distance from vibrating point for attachment to stud.
(2) Inserts end of spring into holding tweezers of master
balance wheel assembly, and adjusts tweezers until pivots and
arms of test and master balances are aligned. Releases lever
that gives starting impulse to both balances simultaneously, and
observes operation to determine if balances are synchronized.
Resets holidng point of vibrator tweezers and repeats operation
until balances are synchronized. Cuts off spring at specified
distance from vibrating point for attachment to stud, using
ctuting pliers.
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Hairspring Vibrator
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