Hand Crafted Incandescent Light

RADIAL LIGHT BULB

Creation process of a big incandescent light bulb. Tube diameter is 120mm and full lenth of the glass envelope is 650mm.
  • Year: 2016
  • Project: Vacuum (no gas inside) incandescent light bulb

Filament assembly - glass cups attached to a rod
Filament assembly. Glass cups attached to a rod
Glass flame annealing
Flame annealing
3 glass rods has been attached to a cup
3 glass rods has been attached to a cup
glass rod flat end
All rods were cut ot fit envelope inner size
Filament assembly glass work is completed
Filament assembly glass work is completed
bulb filament installation
Bulb filament installation
Attaching base tube to main big envelope tube
Attaching base tube to a big envelope tube
Filament assembly inside envelope ready to be attached together
Filament assembly inside envelope tube. Ready to be attached together
Preparing the setup on glass lathe
Preparing the setup on glass lathe
Light bulb is almost ready - flame annealing process
Light bulb is almost ready - flame annealing process
Light bulb before pumping. My hand for a scale.
Light bulb before pumping. My hand for a scale
Leaky glass metal seal, remaking the seal part
Unfortunately during the vacuum pumping I have discovered that there is a leak in the seal, so I had to saw off the seal, and rebuild the lamp
lead-in wires sealed
Glass metal seal
Bulb after seal repair connected to a vaccum post
Bulb after seal repair, connected to a vaccum post
Finished big light bulb
Finished big light bulb
Glowing! Common light bulb for a scale
Glowing! Common light bulb for a scale
Lamp lower section closeup
Lamp lower section closeup
Upper section glow
Upper section glow

Next project - "RING BULB"