The filament is crimped to the Dumet leads and pinched into a stem of glass tubing. A bulb is blown in another piece of tubing and the two are welded together, evacuated with a vacuum pump ...

A broken light bulb doesn’t just leave you in the dark. Shattered glass and exposed electrical connections are a hazard, ...

The lighting of individual homes and businesses via the incandescent light bulb was a new and awe-inspiring phenomena during ...