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Recent Posts

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12
Antique Bulb Discussion / antique stearn leuconium light bulb
« Last post by rom1 on November 13, 2017, 05:42:49 pm »
antique stearn leuconium light bulb english made 100v 20w  Hello everyone , I am new member  to the forum and I live in France ,
I started a collection of old bulb since 1 year !
 I found this bulb there is very little time and I do not know much about the brand and the type of filament

   http://www.casimages.com/i/171113112730335507.jpg.html              http://www.casimages.com/i/171113112814728852.jpg.html                         http://www.casimages.com/i/171113112843403095.jpg.html                    http://www.casimages.com/i/171113112912940819.jpg.html
13
General Discussion / Re: shipping old light bulbs in the mail
« Last post by Tim on November 12, 2017, 10:12:47 am »
There's always a risk in shipping antique light bulbs, but to help reduce those risks, I wrote a short article several years ago describing the shipping method I use: How to package and ship antique light bulbs
14
General Discussion / shipping old light bulbs in the mail
« Last post by Kent46 on November 11, 2017, 06:43:59 pm »
Is there a way to ship old bulbs in the mail without risking having the filament breaking in shipment?   Thank you!
15
Antique Bulb Discussion / Re: Need help with this OSRAM light bulb...
« Last post by adam2 on November 10, 2017, 12:59:54 pm »
That type of lamp, rather than just the example that you have, is often known as a "cage filament navigation" lamp or bulb.

Value is rather unknown, if you have a number of them, try putting one on fleabay and see what happens ?
16
Antique Bulb Discussion / Re: Need help with this OSRAM light bulb...
« Last post by Faneco on November 09, 2017, 06:22:46 pm »
Hello again
Thank you so much for the help, Chris and Adam.
Any ideia on the specific name of the bulb? Or usage category?
Any ideia of their value? I have found like a big lot of them...
Thank you again.
17
Antique Bulb Discussion / Re: Need help with this OSRAM light bulb...
« Last post by adam2 on November 09, 2017, 08:08:43 am »
Yes, probably intended for a ships navigation light.
The old style cage filament is not only vibration resistant, but also gives a consistent light output in all horizontal directions.
The large area of the filament would also give good results in an optical system designed for an oil flame.

Some navigation light bulbs have two filaments, or a tapping part way along the filament, and therefore need more than two connections.
This lamp would however seem to be a single filament type, from the data on the packaging.

I would expect something like "80 watt + 80 watt" or "80/80watt" on a twin filament lamp.

Navigation light bulbs are often of odd voltages and are worked from a standard supply voltage by means of a dropper resistance. A small pilot lamp placed on the bridge is connected across the dropper, and by lighting confirms correct operation of the navigation light.
This bulb was probably intended for a 220 volt or 230 volt circuit, with 5 volts or 15 volts across the dropper resistance.
18
Antique Bulb Discussion / Help identifying old light bulbs please!
« Last post by Judjam on November 08, 2017, 07:51:42 pm »
These 2 light bulbs were found when cleaning out an elderly neighbor's shed. The filaments appear to be intact.
#1 is about 9 3/4" and is marked on top
6000L
405w
GE
125v
Group Replacement

#2 is 8" and unmarked but does have a swirl on top where a tip would be.

Both seem to have the same filament on top but the bottoms of them are different.

I would love to sell them but not sure what their value could be and at this point am just curious as to their age.

Thanks in advance,
Judy
19
Antique Bulb Discussion / Re: Need help with this OSRAM light bulb...
« Last post by Chris W. Millinship on November 02, 2017, 05:23:46 pm »
Those are/were, as far as I recall, navigation light lamps for ships. The use of a straight cage filament was to give it more mechanical resistance against vibration in use - many more mechanical supports inside than a regular coiled type which provide better protection. The valve type base has connections to the filament in different sections either to allow dimming by switching more or less of the filament in and out, or possibly to allow operation on different voltages depending on operation of the ship. The HM Government franking suggests military operation - they`re probably from Navy ships. Unfortunately I`m struggling with the date code so can`t say when it was produced - doesn`t seem the usual Osram format unless I`m reading it wrong.

Hope my memory hasn`t failed (as it so often does!) and that this is of use.
20
Antique Bulb Discussion / Re: Need help with this OSRAM light bulb...
« Last post by Faneco on November 02, 2017, 04:53:56 am »
The packaging looks modern but the design is old (drawn tungsten cage filament), so I'm a bit confused, not to mention the odd vacuum tube / valve-like 4-pin base.  Sorry, I don't have an answer on this one.  Maybe someone else will recognize it.  Interesting bulb though!

Hello
Thank you for your reply.
The packging is the original of this bulb, as i have a good quantity of them and all have this kind of packaging.
About the bulb itself, don't know a thing about it.
Don't you have an ideia of where it would be used?
Thank you again for your help!!
Pedro
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