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BULB DISCUSSION BOARDS => Antique Bulb Discussion => Topic started by: LouBet on February 11, 2018, 05:51:56 pm

Title: Interesting old lamp to identify
Post by: LouBet on February 11, 2018, 05:51:56 pm
The most noteworthy item to note on this lamp is the filament which looks like a miniature bed spring.   This spring is mounted sideways and is about 5/8 inch long tapering from one end to the next.   The bulb portion is almost exactly 3 inch in diameter and the entire bulb is right at 5 inches long.   The base is a tarnished brass and then there is a tarnished brass collar or ~ 5/8 inch wide ring found just above that at the very base of the glass taper.   The filament is good even though the bottom center connection has an ashen solder that fails to provide good contact.   Any ideas are welcomed
Thanks guys
Title: Re: Interesting old lamp to identify
Post by: Mónico González on February 12, 2018, 09:27:19 am
Hi!
Could you upload a picture of that lamp to it coud be viewed?. By your description and explanation it seems to be a projection Stereopticon carbon lamp. These ones were used as light source for precission optical devices.