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Marland

Andrew Gabriel wrote:
In article ,
(D.M. Procida) writes:
I bought a lightbulb (and a ceramic holder and rotary lightswitch) in a
second-hand shop yesterday. They had many beautiful items taken from an
old electronics teaching laboratory - all brass, steel, ceramic and
wood.

The lightbulb:
https://www.dropbox.com/s/qw0vnqdtvemf0ld/lightbulb.jpg?dl=0.

It's about 10cm tall, and has an Edison screw. The filament loops up and
down the bulb in six lengths. It's made by Osram, but there are o other
readable markings on it.

Any idea what the purpose of a lightbulb like this might be?

It is sort of mimicing the original squirrel cage filament lamps,
but those were far too fragile to be used in a lab where they
would likely be moved around.

Squirrel cage lamps were for many years the std fitment for ships
navigation lights as they gave a nice even light distribution, they often
move around a fair bit especially at the top of a mast so I dont think
they were that fragile.

GH