At first glance, not a
particularly unusual lamp. Until you look a bit closer
anyway. Instead of a long mains voltage C shaped filament,
there's a tightly coiled 12V filament mounted above a small heat
reflective disc.
The
downside of the filament being mounted in this way is that combined
with the smooth mirror-like reflector, is a very blotchy beam pattern
compared to what it would be possible to create using an axial filament.
Also of
interest in this lamp is the method that the filament is actually
fastened to the support posts, in that rather than the usual crimp
arrangement, the filament has actually been welded to the posts, as is
the metal disc, being connected to one of the electrical connections to
the filament. This must have been quite an expensive and time
consuming assembly to put together compared to more conventional lamp
structures.
Another
point which makes me think this must be one of Thorn's slightly more
upmarket lamps is the highly elaborate cardboard cradle which the lamp
is packed in within its carton.
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