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<di
My family, and my wife's, had the angel chimes, powered by 4 small
candles. They appeared every Christmas. This was in BC.
Doug Linzey
On 5/27/2020 10:23 AM, David Webster wrote:
>
> Hi again Henk & All,
>
> Original box found; says "Swedish Angel Chimes" on main panel:
> "Angel Chimes A Product of Swedish Handicraft" on end tab.
> YT, DW, Kentville
>
> -------- Forwarded Message --------
> Subject: Re: [NatureNS] Stove Blacking and heat transmission
> Date: Wed, 27 May 2020 08:44:56 -0300
> From: David Webster <dwebster@glinx.com>
> To: naturens@chebucto.ns.ca
>
>
>
> Hi Henk & All, It is one of these effects which must be seen to be
> believed; the difference between 'black and white' (via dull grey).
> That Swedish connection may be in error. Will be on the lookout for
> the original package likely about 50 years old.
>
> Dave W.
>
> On 5/26/2020 9:13 PM, Henk Kwindt wrote:
>> Hi Dave and All,
>>
>> I don’t really have anything to add to your explanation but I thought
>> it interesting that you have one of those “angel carousels”!
>> We have had ours for at least 40+ years, they were quite popular in
>> The Netherlands in the 60s, didn’t know they came from Sweden.
>> Ours is packed with other Christmas decorations so it is being placed
>> on the stove every year in Dec.
>> We have not used the candles to “power” it for a long time.
>> Since we have a more modern high efficiency stove the black top is
>> not directly accessible so I won’t be able to repeat your experiment.
>> Henk Kwindt, Cow Bay, NS.
>>
>>
>>
>>> On May 26, 2020, at 7:47 PM, David Webster <dwebster@glinx.com> wrote:
>>>
>>> Hi Steve & All,
>>>
>>> No my mill is powered entirely by upward flow of warm air; a thin
>>> circular sheet of brass clipped to form eight vanes which slope
>>> downward to the left. This fan consequently turns near side to the
>>> left. (Clockwise viewed from above).
>>>
>>> The original unit, made in Sweden, was powered by candles and
>>> intended as a Christmas table decoration.
>>>
>>> The fan is supported by a brass plate with three arms on each of
>>> which an angel hangs and a brass rod hanging from each angel rings a
>>> chime as it turns.
>>>
>>> I just stuck the working parts in a support made from a length of
>>> burned out oven element, bent to be stable with the filling removed
>>> from the vertical end by tapping.
>>>
>>> Just to confuse matters; note that what we call clockwise (down on
>>> the right side) is counterclockwise from the clock's viewpoint.
>>>
>>> YT, Dave W.
>>>
>>>
>>> On 5/26/2020 5:53 PM, Stephen Shaw wrote:
>>>> Hi Dave,
>>>> I’m not familiar with your named device or its principle of
>>>> operation, but we too have a small windmill that simply rests on
>>>> top of our (also black) wood stove and spins faster as the stove
>>>> heats up. It works as a Peltier device, with parallel hot and cold
>>>> junctions built into a short aluminium tower, the top of which is
>>>> an air-cooled heat sink. I think it cost ~$130 some years ago. The
>>>> ‘hot' side of the Peltier junction faces down to the hot stove top
>>>> upon which the frame rests, while the ‘cold' side is uppermost, and
>>>> its heat sink is cooled partly by the little rotating fan and
>>>> partly by radiation. With enough heating differential, the Peltier
>>>> effect generates a small current which is enough to turn a small DC
>>>> motor that carries the fan.
>>>> Is this like your device? If so, you may have simply have cleaned
>>>> and in effect flattened the stove top a bit so the base of the
>>>> device makes better thermal contact with the Al base of the
>>>> windmill, though the black-body improvement should help a bit. A
>>>> better solution in my case and maybe yours would be to apply a thin
>>>> layer of heat-sink compound to the base of the tower. This is a
>>>> messy paste based on zinc oxide, used standard in electronics to
>>>> attach a power transistor to an aluminium or copper heat sink,
>>>> while at the same time providing electrical insulation. It would
>>>> certainly enhance heat conduction to our windmill, but the compound
>>>> is white, sticky and difficult to remove once applied: I would
>>>> become locally unpopular if I so disfigured our black stove top, so
>>>> I haven’t yet risked the experiment.
>>>> Steve
>>>>
>>>> On May 25, 2020, at 7:55 PM, David Webster <dwebster@glinx.com> wrote:
>>>>> Dear All,
>>>>>
>>>>> I heat the house mostly with wood burned in a fireplace insert and,
>>>>> apart from some air circulation in under the fire box, up behind
>>>>> it and
>>>>> out over the top, most heating is radiant off of the top.
>>>>>
>>>>> For decades I have used a Swedish Christmas heat mill, sold for
>>>>> candles, which I adapted for stove top use, as a measure of heat
>>>>> release
>>>>> rate. In recent decades it turned less frequently and for several
>>>>> years
>>>>> not turned at all even with a brisk fire so I suspected wear and
>>>>> increased friction at pivot points.
>>>>>
>>>>> The stove top had become dull grey in color so to improve
>>>>> appearance I located a source of blacking last fall but it could be
>>>>> applied only to a cold stove so was applied to the top, on first
>>>>> recent
>>>>> warm morning this spring, and the increase in heat radiation from the
>>>>> top was dramatic. With just a token fire that Swedish heat mill was
>>>>> spinning full tilt !
>>>>>
>>>>> This I assume was a practical demonstration of increased radiation
>>>>> from a black surface (Black Body Radiation ?). And all along I had
>>>>> imagined that stove blacking was just for appearance.
>>>>>
>>>>> Yt, DW, Kentville
>>>>>
>>>>>
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