Recent Posts

81

Antique Bulb Discussion / Re: Manufacture Date: Columbia Carbon Bulb

« Last post by NZ on February 07, 2020, 07:54:28 pm »

Thanks for your reply and the info PChris, Cotton wool makes sense

82

Antique Bulb Discussion / Re: Manufacture Date: Columbia Carbon Bulb

« Last post by PCris on January 28, 2020, 03:48:46 pm »

Hello NZ,

I think your estimate c. 1905 is right in the ballpark.

The black glass insulator on the base began replacing earlier forms of insultation such as porcelain or plaster around 1901. The 8cp and 16cp (candle power) ratings were phased out on carbon filament lamps in 1910 (replaced by wattage ratings). So c. 1905 is a realistic estimate.

The filling in the stem is cotton wool, possibly used to prevent the lead-in wires from accidentally coming into contact with each other during manufacture of the bulb.

Best Regards,
PCris

83

Wanted to Buy / Re: Looking for lamp

« Last post by smiler on January 21, 2020, 08:18:04 pm »

Also, the lamp base is marked DURO-LITE and USA

84

Wanted to Buy / Looking for lamp

« Last post by smiler on January 21, 2020, 08:16:36 pm »

Greetings, I'm looking for a replacement lamp.  Can't tell what wattage (15W? 7.5W?), looks like an E17 base.  It came on an 1879 edison lamp replica.

85

Antique Bulb Discussion / Does anyone recognize this type bulb?

« Last post by bryanjacob on January 12, 2020, 05:31:49 pm »

What kind of bulb is this? It glows purple between the two metal plates inside the globe. Thanks.

86

Wanted to Buy / Re: Small 5/16" screw base 110v light bulb

« Last post by Artswhirld on January 09, 2020, 11:44:16 am »

It would work if I could find one to screw into the base.

87

Wanted to Buy / Re: Small 5/16" screw base 110v light bulb

« Last post by David on January 09, 2020, 08:06:32 am »

How does an LED bulb work?
please help

My website: Smoked glass splashbacks

88

Wanted to Buy / Small 5/16" screw base 110v light bulb

« Last post by Artswhirld on January 08, 2020, 03:48:40 pm »

Hello,
I am trying to find a small  110v light bulb that will screw into 5/16" screw base for an antique night light.
Can someone please help me. Thank you.
You can email me at arthurrleite@gmail.com

89

Antique Bulb Discussion / Re: Manufacture Date: Columbia Carbon Bulb

« Last post by NZ 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?

90

Antique Bulb Discussion / Manufacture Date: Columbia Carbon Bulb

« Last post by NZ 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.