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| Info about this bulb |
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Rating: -unknown (16cp 110v?) Came from: U.S.A. Manufactured: 1900's Purchased: February 2003 Price paid: $5 Bulb rarity: Very rare Best feature: True Ruby red glass |
| Ruby Red Carbon Lightbulb |
This is a medium-sized, tipped carbon filament bulb, with a Ruby Red-colored envelope (true red glass, not painted). This bulb may have been used in a darkroom lamp, for developing film. The sleeve pictured belongs to a different bulb, however the original sleeve of this bulb must have looked pretty much the same. It probably had many patents written on it. Back then, bulbs were a fairly new invention, and patents were enforced a lot. Lightbulb manufacturers had to make sure that you were aware of these patents by printing them all over the packaging. Patent notices were also included inside the stem of each bulb, in a little brown piece of paper. Lightbulb manufacturers had to license these patents so that they could sell the bulbs legally. For example, I have a "Sterling" carbon bulb that has a little note in its stem that says: "The manufacturer of this lamp is licensed under patents noted on the other side". On the other side you can see lots of patents listed. Click here to see one of these little brown notes. It appears that in the early 1910's, the requirement of adding little patent notes to each bulb was dropped, since I don't remember seeing a post-1910 bulb with the notes. I got my red bulb for real cheap, but I'm sure it is worth a lot more. =)
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