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Other Vintage Household Electrical or Electromechanical Items For discussions about other vintage (over 25 years old) electrical and electromechanical household items. See the sticky thread for details.

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Old 5th Aug 2012, 12:01 pm   #61
Lloyd 1985
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Default Re: Pip top bulbs and adulterations etc?

I remember we used to have an old bulb at the top of our stairs for years, I knew it was the same one as it had a paint splat down one side! Certainly not like the cheap ones I bought which tend to explode in their holders...
yes, it definitely was a dud, it was only 1 of 2 bulbs in the house! the rest were either smashed or missing.

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Old 5th Aug 2012, 12:21 pm   #62
broadgage
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Default Re: Pip top bulbs and adulterations etc?

Twin filament domestic lamps are still made and sold in the USA, normally reffered to as "3 way".
They have a standard size screw base but with an extra contact ring between the solder pip and the screw shell.
Various wattages existed but the most common had a 60 watt filament and 100 watt filament.
There is even a compact flourescent alternative that fits the same special lamholders and gives 3 levels of light, so at to emulate the 3 levels given by the twin filament lamp.

UK 240 volt versions used to be popular in the 1960s and 1970s, usually in table or floor standing lamps, not on fixed lighting circuits.
AFAIK these are no longer made, though a few no doubt exist in old retailers.
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Old 5th Aug 2012, 10:12 pm   #63
MrElectronicman
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Default Re: Pip top bulbs and adulterations etc?

Broadgage is correct, there used to be lots of 3 way dual filament bulbs available, in various wattages in the US. Have not seen any CFL types personally, but they do exist.

The US like Europe are phasing out incandescent bulbs, so CFL's are becoming more common. Now LED bulbs are coming down in price it look as if they will ultimately prevail, as CFL's contain that dreaded mercury stuff
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Old 6th Aug 2012, 4:25 pm   #64
HamishBoxer
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Default Re: Pip top bulbs and adulterations etc?

The filament is indeed open by looking at it.
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Old 6th Aug 2012, 7:34 pm   #65
matthewhouse
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Default Re: Pip top bulbs and adulterations etc?

Here is an advert from a 1930s electrical magazine, advertising a Doto twin filiment bulb. It also has an unusual glass design to reduce glare. This hasn't shown up well on the scan.

The second image is of a page showing various standard (at the time) lamp caps, again from a 1930s electrical magazine.
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Old 6th Aug 2012, 7:53 pm   #66
McMurdo
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Default Re: Pip top bulbs and adulterations etc?

The Titanic 1st class suites had dual filament light fittings
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Old 8th Aug 2012, 11:59 am   #67
Brigham
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Default Re: Pip top bulbs and adulterations etc?

Presumably with Lundberg all/part/off switches for maximum flexibility. I stare in awe at the Lundberg catalogues; so early on in a new technology, yet so far advanced.

Can anyone scan a few? Mine have disappeared over the years.
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