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General Discussion / Re: 4v 0.75a osram small edison screw bulbs
« Last post by adam2 on June 17, 2018, 05:37:25 pm »
Quite possibly a bulb for a miners cap lamp, but two other possibilities occur to me.
Firstly, perhaps an exciter lamp for a movie film projector, not of course to project the image but for sound reproduction. Many movie films had an optical sound track, through which light from a small lamp was passed and partially obscured before being detected by a photocell and amplified to produce the audio signal. To avoid any mains hum being superimposed on the audio, exciter lamps were usually operated at high frequency from a valve oscillator, this being simpler than producing smooth DC.

Alternatively it might be a lamp for lighting a microscope or a reflecting galvanometer. Such instruments often used odd lamps, I suspect to stop people using cheap torch bulbs or vehicle bulbs.
Antique Bulb Discussion / Re: Light bulb collection for sale
« Last post by cmshapiro on June 11, 2018, 12:03:57 am »
I am surely interested, please email me at
Antique Bulb Discussion / Light bulb collection for sale
« Last post by Crisp 1234 on June 10, 2018, 04:43:04 pm »
I have an antique light bulb collection that I'm interested in selling bulbs are from thev1880s to the 1920s
General Discussion / Re: 4v 0.75a osram small edison screw bulbs
« Last post by Mónico González on May 23, 2018, 12:57:47 pm »
I realize this is a little old post, but till today I've not read it.
I guess as you have said, that this lamps must be for mining lighting purposes. In fact, miner's helmet lamps works usually on that electric values because as you've said also, the source commonly used even to our days for mining lamps have been the classic two cell 4v lead battery or its "nearer" 3,6v Ni-Cd or Ni-MH 3 cell counterpart, so, that standard voltage of miniature lamps for that use.
About the extra lenght of its threaded cap, I couldn't say nothing, because I must see at least a picture of your particular bulbs, but I guess it could be done with the purpose of avoiding the unscrewing the whole lamp while on service due to vibrations, shocks or dropping of the reflector head directly to the floor. I've been using standard miniature mining lamps often during many years (and I'm still doing it), but all of them has the classic miniature SES cap, or E10 as here in Europe is known, exactly the same used for regular consumer flashlight and lanterns for household use. The main difference about both kind of bulbs is their nominal current consumption, that is greater for mining lamps, usually from a minimum of 500 mA for "short range light" and at least 1A for "long throw" concentrated beam. Most of times newest regular filament mining lamps are gas filled, not vacuum as for regular use flashlight ones, but in the later times of incandescent portable mining lighting before the coming of LED's, those lamps used to be of quartz-halogen type.
If you are interested about this issue I suggest you could post some pics of them, please.
Antique Bulb Discussion / Royal Ediswan Bulb
« Last post by johnzissler on April 09, 2018, 11:34:25 am »
I have a variety of original early 20th century light bulbs. One is a 'tipped' bayonet bulb that has the name 'Royal Ediswan' and 'by appointment' with the royal crest.
I have no knowledge of light bulbs and wondered if there was any value in this bulb or demand?
I have various other types of similar age including one made in Austria.
General Discussion / Lumolite Australia
« Last post by Plasma Australia on March 16, 2018, 05:41:00 pm »
Hello everyone,
Im trying to find out more information on the company Hogan Electronics of 17 Gibbens st, Camperdown, NSW and in particular during what years they made neon electrodes for Australian sign companies.
Im a neon and plasma tube maker and was recently given an old glass shops inventory. Amongst the haul is half a box of Lumolite electrodes. I know that the company made glow lamps in the 40's and 50's but if anyone could date the electrode manufacturing time, I would be most grateful..


Kyp's work shines. All I gotta find now are a 7-UP can lamp with a green G-bulb, a few of the candelabra-base Balafires, and one of Don's beautiful Electric Flames. Thank you, Don.

I had the can with the bulb in high school!

Do you know how many American Flag (two vanes, w/ point on top of bulb) he made? What are those worth?
For Sale / Trade / Re: For sale: Antique "POPEYE" filament lightbulb ca 1930's
« Last post by Knomad on March 02, 2018, 10:08:22 am »
Thank you for your action; I have no way to determine if an inquiry is sincere or malicious. Knomad
For Sale / Trade / Re: For sale: Antique "POPEYE" filament lightbulb ca 1930's
« Last post by Tim on March 01, 2018, 08:36:55 pm »
Reply to "Unwritter"
I'm not sure I understand your question.  The for-sale description addresses my Popeye bulb; i.e., it works.  If you are interested, I will be glad to answer your question.

I've banned and deleted user "Unwritter" as it appeared very suspicious..
For Sale / Trade / Re: Antique Edison Bulb and other Edison related items
« Last post by cmshapiro on February 23, 2018, 09:30:35 pm »
PM sent. Please contact me via email or phone number provided.
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