ABSTRACT
The development of better radiant infrared heat sources was driven by the desire to generate higher heating levels for industrial, commercial and even military applications. The early heat sources were hollow metal tubes containing a coil of nichrome, or similar high-resistance wire, that produced a peak radiation at a color temperature of 925K. When that same coil was placed in a quartz tube, the re-radiated heat from the quartz raised the peak radiation temperature to 1250K. There are several features that make the T3 quartz infrared lamp a unique heat source. Its small size reduces the necessary size of its mounting fixture. The original infrared lamps designed for use in industry and the home were made with conventional incandescent lamp bulbs, such as the reflector types (R40) and the globular types (G30). Burning the lamp in the vertical position will cause the heavy filament to collapse from its own weight, making it sag and short-out its windings.
