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Incandescent:
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You are here: Home > Top > Search Results > wc0013
wc0013  

 
wc0013.jpg
  
history and origins
 
Manufacturer / Brand Name
 Royal Ediswan Pointolite
Country of Origin
 England
Factory Location
 Unknown
Date of Manufacture
 ca.1924
 
electrical attributes
 
Voltage
 Unknown
Wattage / Candle Power
 100cp

Amperage
 

physical attributes
 
Envelope
 3.00" Dia.		 Atmosphere
 Gas Filled
Finish / Color
 Clear 		Filament
 Coiled; Tungsten Sphere
 
Base
 Edison; Medium 		 
 
comments
  Royal Ediswan DC operated Pointolite arc lamp fitted with a special three contact Edison medium screw base. This particular sized lamp was specially suited for small projection and microscopic work. There is a glass deflector within the lamp that is used to collect disintregrated tungsten particles. This feature was patented Feb.13th, 1919 by the Edison-Swan Electric Co. and P. Freedman (British Patent #142,574).