|Lamps, Inc. Numeralamp Numitron Tube
|Written by AnubisTTP on 2006-10-15
The Lamps, Inc. 'Numeralamp' is a fairly typical seven segment display with a standard nine pin base. The unusual feature which sets this device apart from other similar tubes is that it has a small stand-alone incandescent lamp as its decimal point indicator, technically making it a multi-envelope device. The Numeralamp also appears to have a second attachment point for another incandescent lamp at the top of the tube. The filaments on this display are rated at 4 volts, and Lamps Inc claims a very high lifespan of 200,000 hours for the tube filaments if that voltage is maintained.
Special thanks to reader Guido Mennen for identifying this previously anonymous device.
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Numeralamp display tube, at rest. Note the small incandescent bulb for the decimal point, a feature believed to be unique to this model of filament display.
A period advertisement for Numeralamp displays from 1968.