The three labels on the underside of the top of my rain lamp.
These labels read:
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CAUTION Because of fire hazards, use only 60 WATT bulb or less. Lamp rated 1 Amp., 120 Volt, 60 Hertz. JOHNSON INDUSTRIES |
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CAUTION To avoid fire hazard & toxicity refill lamp with 1 qt. Drakeol #35 oil. |
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SERIAL NO. 73788 JOHNSON INDUSTRIES |
"Johnson Industries" is significant because that was the company founded by Darrell Johnson, the inventor of the rain lamp. Not all vintage rain lamps are from Johnson Industries of Los Angeles, however. For example, another major rain lamp manufacturer in the 1970s was Creators, Inc. of Chicago.
"Drakeol #35 oil" is merely a type of mineral oil, according to various Internet sources. The mention of "1 qt." (= 2 pints) is significant because it indicates that at least this rain lamp can and should hold more oil (2 pints) than just the bare minimum that makes it function (1 1/2 pints).
As an incidental note, there were two stickers with numbers on the inside area at the lamp top. One sticker on the bulb housing of the cage part said "18", and one sticker on the bulb socket on the lid said "5". My guess is that these numbers designate different sizes for the parts so that the correctly sized parts get matched with the correct lamps in the company's assembly area, since there were different sizes of rain lamps that were made.
