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Author Topic: Manufacture Date: Columbia Carbon Bulb  (Read 1155 times)

Offline NZ

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Manufacture Date: Columbia Carbon Bulb
« on: January 08, 2020, 01:43:59 am »
Greetings and Happy New Year

I recently uncovered some bulbs that I don't seem to be able to find much about and would like to know a bit more about their manufacture date if possible.
The manufacturer is The Columbia Incandescent Lamp Co.
ST. LOUIS, MO.
100v, I have both 8 and 16cp versions as some still had a paper label with their rating.
Glass base, I'm guessing circa 1905?



There's a paper insert in the stem that has patent information that I've tried to capture.



Regards.



Offline NZ

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Re: Manufacture Date: Columbia Carbon Bulb
« Reply #1 on: January 08, 2020, 01:53:36 am »
Sorry about the size of the photos, I thought I had reduced them down more.
I also noticed that the tube with the patent information appears to be filled at the base with something that resembles horse hair?