One of eighty-six early incandescent lamps. Carbon

One of eighty-six early incandescent lamps. Carbon filament lamp, two M-shaped filaments, no filament supports. Four platinum lead in wires pass through same quick seal, clear spherical bulb. Top pip. Bayonet cap of insulating material encircled by brass band. Flange on cap near glass. Two elliptical brass contact plates. Robertson etched onglass. 280-8 D.E. etched on glass (volts-c.p.) There are only two electrical contacts the filaments are either inseries or parallel, probably series given the light voltage.

Details

Category:
Lighting
Object Number:
1923-173/80
type:
carbon filament lamp
credit:
Institution of Electronical Engineering
status:
Permanent collection

Cite this page

Rights

We encourage the use and reuse of our collection data.


Data in the title, made, maker and details fields are released under Creative Commons Zero


Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence

Using our data

Download

Download catalogue entry as json

Download manifest IIIF

Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.