Lamps, Inc. Numeralamp Numitron Tube  
Written by AnubisTTP on 2006-10-15  

Description

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.

More

Numeralamp Numitron Tube
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.

Numeralamp Numitron Tube Advertisement
A period advertisement for Numeralamp displays from 1968.

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