O.T. somewhat Old Chime /Clock Door Bell Repair

Posted by mm on November 5, 2009, 10:19 pm

wrote:

>mm wrote:

>> wrote:
>>

>>> Chris wrote:
>>>>> wrote:
>>>>>> I have a 55 year old door chime clock and the board has carbon arcs
>>>>>> which is
>>>>> What is a door chime clock?
>>>>>> causing a short. I have seen boards with this problem before and they
>>>>>> were
>>>>>> repaired using some type of filler. The filler I have seen has always
>>>>>> been
>>>>>> white if this helps. I tried Google to see what is used. Does someone
>>>>>> on the
>>>>>> group know?
>>>>> Plastic wood? It's not white but it might be more like the wood that
>>>>> is there?
>>>>>> Thank you for your help
>>>>>> Chris
>>>> It is a door bell A nutone k46. They have not made them since the mid
>>>> 90's and you can no longer get parts. They were the rage back in the mid
>>>> '50s when they came out.
>>> I don't think I ever saw one but I'd love to get just a plain door chime
>>> with 4 or 5 chimes and they ring a short song. Well I love to get one
>>> if it were cheap anyway.

>>
>> I haven't seen them but I've heard them, live, going back 40 years,
>> that play, dum, dum, doom, dum; doom, dum, dum, doom. (I'm not sure
>> my representation is very good. I'm tone deaf so I can't give you
>> notes from a scale.) That's at the front door. AT the back door they
>> just play the first four sounds.
>>
>> These are real chimes, not electronic sounds. There are between 2 and
>> 4 pitches required.
>>
>> I think it could get annoying if you have a lot of visitors, that it
>> has to play 8 notes every time.

>you mean Westminster chimes?

I've only been to Westminster, Maryland, so I'm not sure.

>http://en.wikipedia.org/wiki/Westminster_Quarters

Listening to the midi file here at least some of them were that, and
the midi file reminds me that that sequence is 16 tone. No wonder I
found it annoying, and I was just visiting the house.

It seems to me the page wasn't written entriely by a native English
speaker. At least not American English. It says in part:

The permutationen are:

1. g4, f?4, e4, b3
2. e4, g?4, f?4, b3
3. e4, f?4, g?4, e4
4. g4, e4, f?4, b3
5. b3, f?4, g?4, e4

played as three crotchets and a dotted minim. A different sequence of
these permutations is played at each quarter-hour: one set at the
first quarter, two sets at the half, and so forth, as follows:

>requires four bells - and I'm not sure I'd want it as a doorbell unless
>I was sure that I'd never have a chiming clock, otherwise things could
>get confusing :)
>nate

Posted by Tony on November 6, 2009, 7:07 pm

Chris wrote:

> I have a 55 year old door chime clock and the board has carbon arcs
> which is causing a short. I have seen boards with this problem before
> and they were
> repaired using some type of filler. The filler I have seen has always
> been white if this helps. I tried Google to see what is used. Does
> someone on the group know?

I've worked on similar units in pinball machines and I *think* I can
picture exactly what you have. After removing all the carbonized areas,
I've used epoxy or bondo, put tape on the back and fill in the void.
I've fixed some that were so bad that after epoxy, I had to drill out
and install the old, or new brass rivets that make contact with the
wiper fingers. Then of course the wires have to be soldered back onto
the rivets.

Never ever ever ever use contact cleaner on it. For some reason it will
cause the carbon arc to form. I've seen it literally 100's of times.
Clean it with light oil on a cloth and leave some oil on it or give it a
light coat of lubriplate (actually almost any light grease will do)
Just stay away from the contact cleaner. If grease on electrical
contacts doesn't sound quite right, well it didn't sound right to me
either 30 years ago when I first saw it. It works great reducing
friction wear and also helps keep the contacts from pitting.

Note: this is only for contacts with wiper fingers, relay type contacts
get filed clean and they never get grease/oil and again never use
contact cleaner. I honestly don't know what contact cleaner is good for?

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O.T. somewhat Old Chime /Clock Door Bell Repair - Page 4