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on finding a 30-hour watch
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Daniel Bastos
Jan 27, 2012, 9:45:04 AM1/27/12
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Ladies and gentlemen, good evening. I apologize if this isn't the proper group to post. I'm looking for a 30-hour watch.
You know those 24-hour watches? I'd like one like that, except that I want it to mark 30 hours. I'll accept one that marks 15. (I'm hoping to find one that looks old. You know, I'm looking for something extravagant.)
I spoke with a local expert on the subject and he said that the workings of a watch are set to mark 12 or 24 hours. He wouldn't know how to change that. So he said I better call a factory and see what they can do. I'm based in Rio de Janeiro, Brazil.
I was hoping that I could buy one old-looking clock and have it adjusted to mark 30 hours. I'd then be left with the task of finding a background that has 30 positions --- I'd accept 15 too.
I'll appreciate any advice. Thank you.
You know those 24-hour watches? I'd like one like that, except that I want it to mark 30 hours. I'll accept one that marks 15. (I'm hoping to find one that looks old. You know, I'm looking for something extravagant.)
I spoke with a local expert on the subject and he said that the workings of a watch are set to mark 12 or 24 hours. He wouldn't know how to change that. So he said I better call a factory and see what they can do. I'm based in Rio de Janeiro, Brazil.
I was hoping that I could buy one old-looking clock and have it adjusted to mark 30 hours. I'd then be left with the task of finding a background that has 30 positions --- I'd accept 15 too.
I'll appreciate any advice. Thank you.
dAz
Jan 27, 2012, 6:40:31 PM1/27/12
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cannon pinion that carries the hour hand is meshed to the minute wheel,
the minute pinion is meshed to the hour wheel which carries the hour hands
http://people.timezone.com/msandler/Articles/BestYears/Pic29.jpg
the hour wheel is the large brass gear, it rides on the cannon pinion
and the minute wheel and pinion is to the left.
normally the gearing is the hour wheel turns at 1/12th or 1/24 the speed
of the cannon pinion, to go at 1/30th would involve recalculating the
train count and making a new hour wheel and minute wheel and pinion to suit.
if you were to use a large watch movement like a Unitas 6497 or 6498 and
have someone make/modify the dial train and have a dial maker do a
30hour dial, it could be done. won't be cheap but.
can I ask why you particularly want a 30hour dial?
Beau G.
Jan 27, 2012, 8:56:01 PM1/27/12
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Hi Daniel,
It seems to me that this issue would be simply solved by having a
custom dial made. Having a dial that is marked off for 30 hours
instead of 12 would likely look very busy and crowded but I am sure
this could be done. Of course such a dial on a watch would still be
able to have a date window but you would continually have the date
changing 6 hours later every day (how would that work out? I'm
confused.)
Anyway...
good luck with that!
Beau G.
It seems to me that this issue would be simply solved by having a
custom dial made. Having a dial that is marked off for 30 hours
instead of 12 would likely look very busy and crowded but I am sure
this could be done. Of course such a dial on a watch would still be
able to have a date window but you would continually have the date
changing 6 hours later every day (how would that work out? I'm
confused.)
Anyway...
good luck with that!
Beau G.
d530
Jan 28, 2012, 11:40:52 AM1/28/12
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As dAz wrote earlier, it's not a case of dial.
You may easily imagine a dial without any marks on it.
But hour hand will make a whole rotation in 12 hours (or 24 for 24 hour watches) with no respect to dial marking :)
Again, what for 30 hour watch ?
best
You may easily imagine a dial without any marks on it.
But hour hand will make a whole rotation in 12 hours (or 24 for 24 hour watches) with no respect to dial marking :)
Again, what for 30 hour watch ?
best
Fraser Johnston
Jan 31, 2012, 12:58:36 AM1/31/12
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--
Fraser
jeff_wisnia
Feb 3, 2012, 5:11:06 PM2/3/12
to
Jeff
--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
The speed of light is 1.8*10e12 furlongs per fortnight.
Beau G.
Feb 6, 2012, 11:11:45 PM2/6/12
to
Thank you for that.
I had to put my big brain on and really think that one through and I
had me one of those A HA! VIOLA! Moments. (yes, I did say viola. It
comes from a Czech guy I used to know.) I understand now that gearing
is a bigger part of this than just slapping a 30 hour dial on there.
And all this time I thought those 24 hr dial watches just had busier
dials on them but were essentially a standard watch movement.
I continue to learn from you fine folks.
thanks again
So we never did find out why for he wanted a 30 hr watch. Some kind of
shift work crazy rotation thing maybe?
Beau G.
I had to put my big brain on and really think that one through and I
had me one of those A HA! VIOLA! Moments. (yes, I did say viola. It
comes from a Czech guy I used to know.) I understand now that gearing
is a bigger part of this than just slapping a 30 hour dial on there.
And all this time I thought those 24 hr dial watches just had busier
dials on them but were essentially a standard watch movement.
I continue to learn from you fine folks.
thanks again
So we never did find out why for he wanted a 30 hr watch. Some kind of
shift work crazy rotation thing maybe?
Beau G.
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