Re: Wierd Clock Pendulum Period


"Bill Bowden" <wrongaddress@xxxxxxx> wrote in message
news:3fd39365-24dc-4867-a587-fccca7103060@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
| On Mar 13, 10:58 pm, "Androcles" <Headmas...@xxxxxxxxxxxxxxxx> wrote:
| > "Bill Bowden" <wrongaddr...@xxxxxxx> wrote in message
| >
| >
news:2317e816-830b-44c6-8023-999d2ca0b8dd@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
| > |I have a 31 day chiming wall clock made by "Sau Jin LTD" no jewels,
| > | that has a pendulum period of about 53 beats per minute.
| > | It's some non-exact value I haven't determined yet. Is there some
| > | reason for this weird timing, rather than making the period exactly 1
| > | second? Why would it be designed this way?
| > |
| > | -Bill
| >
| > I'll make the pendulum longer and change the gear ratio for the second
hand
| > from 53:1 to 60:1 for you if you like. For a fee, of course.
|
| I could use a toothed brass wheel and link chain if you want to make
| one. The clock was missing the mainspring, and I want to power it with
| a weight and chain instead of the spring. It would need a brass wheel
| about 3 inch diameter with approprate teeth to match the chain and a
| square hole in the center to match the winding key, about 1/8 inch
| square.
|
| I paid $5 for the clock, I'll give you $10 for the drive wheel.
|
| -Bill

I'm a consultant engineer, Bill, not a scrap metal merchant, and whilst
I fully understand and appreciate your interest in horology and would
encourage you to further your hobby as a clock maker, necessary parts
are best made with standard workshop equipment such as lathes,
milling machines and gear cutters. I can direct you to web sites where
you can obtain such equipment. (For a fee, of course.)
This you can have for free:
http://www.amoldiesmaker.com/cmm.asp
I'd recommend you buy the chain ready made, though, unless
you plan on making it long enough to go around the Moon and
avoid having to wind the clock at all.




.

Relevant Pages

  • Re: Wierd Clock Pendulum Period
    ... | a weight and chain instead of the spring. ... It would need a brass wheel ... | I paid $5 for the clock, I'll give you $10 for the drive wheel. ... I won't have to wind the clock. ...
    (sci.physics)
  • Re: Wierd Clock Pendulum Period
    ... |I have a 31 day chiming wall clock made by "Sau Jin LTD" no jewels, ... | that has a pendulum period of about 53 beats per minute. ... I could use a toothed brass wheel and link chain if you want to make ...
    (sci.physics)
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