Hi Blake,
Thanks for sending the pic. It's not very clear on my monitor,
unfortunately. I think there is something different in our clocks. Mine
definitely winds up with a scritchclick sound about every three or four
minutes, then ticks its way back to the rewind position to start the
cycle again. My practice is to shut off the car's electrical system with
a master disconnect switch when car is not in use, and I note that the
clock runs four or five minutes after power is shut off. Next time I
have it out, I'll look for the 51 or 53 or some other model #, as I don't
recall noting it in the past.
Bob
On Wed, 30 May 2001 11:36:09 -0600 Bullwinkle <yd3@nvc.net> writes:
> Bob:
>
> There's no spring at all except for the hair spring on the
> balance wheel. I've taken apart both later 53 style and earlier
> 51 style. Both use a magnet and a contact on the balance wheel.
> The balance wheel is brass with a Y shaped iron armature. On the
> balance wheel is a contact pin which contacts a pivot completing
> the power to the small bobin. This gives tha balace wheel a
> small "kick" every osciallation. Attached is a photo of the
> clock. The pencil points to the contact. The ends of the Y
> armature can be seen. Above the pencil Just below the round bar
> can be seen the magnets field lamanations of three layers.
>
> Blake
>
> <<<snip>>>electrically-wound clock.
> As the clock unwound its mainspring, electric contacts met and
> the device
> ratcheted to wind the spring again.
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