Name/Title
Edison Special Indicator "Test" Incandescent LampEntry/Object ID
2023.2.3Description
Special calibrated incandescent lampf ro use in the Edison pressure (voltage) indicator, used to monitor the voltage of the Edsion system. The pin added to the center contact of the base corresponds with a speicialised socket on the Edison General Electric pressure indicator. This example is missing the solder-applied center pin atnthe bottom of the base; solder attachment still present.Made/Created
Manufacturer
Edison Lamp CompanyDate made
circa 1890Time Period
19th Century
