Larry, that's a very nice lamp stand and shade that you made---and unique! I also like your appliances. In re: Servel, I have been noticing how often I see them as props in movies of the 1940s, especially the B&W film noir ones, and also other movies from that era as well. Keep your eyes open and see whether you spot them, too. They all look pretty much like your 1946 model pictured, which doesn't differ markedly in design from my 1950 BN600-series model, and they all have some form of the familiar Servel logo on the door.larryh wrote:Henry I have had all kinds of servels over the years and most oil models made the past 60 years.. Currently I have been using a 1946 servel which after some adjusting and cleaning works like a charm. I was always fascinated by refrigerators that worked without electrical power. I remember when I first started to buy kerosene in the late 50s it cost 13 cents a gallon. Now is is running 5.00 a gal here. I still use a pot burner oil heater to keep the kitchen and rear room warmer in winter but had to give in to propane for the main section of the home.Henry wrote:Well, I consider something "pricey" when it used to cost c.$3 each and is now $11.95, but I guess that's the German in me coming out! And how I wish Coleman mantles would work on the Aladdins, since the Colemans cost a lot less. Even the mantles for the Humphrey propane gas lights are inexpensive by comparison. At least my 1950 Servel propane refrigerator doesn't use mantles!
If anyone is interested in literature and photos of oil heaters, cooking stoves, refrigerators, incubators, pot burner home heaters, (Siegler, Duo Therm, Coleman, ect.) I have a yahoo group devoted to them, lots of information.
https://groups.yahoo.com/neo/groups/Ker ... ector/info
Larry
As for getting cold from heat, the system is called "gas adsorption," and relies on a refrigerant, in this case ammonia + water + hydrogen, circulating in a closed system through a condenser/evaporator cycle. The basic principle is that gas cools as it expands, and a liquid cools when it evaporates. A heat source is necessary to keep the refrigerant circulating, and this source may be either gas, kerosene, or electricity. (Dual-heat-source gas/electric fridges are made today for use in RVs and in other off-the-grid, non-electric applications.) The whole process is too complicated for me to describe here, but you could google it up!