"High-candlepower Nernst Lamps"¹

Fig. 1. High Candle-power Nernst lamps. - Exterior of Lamp.

"Although the efforts of the German manufacturers were first directed toward the development of Nernst lamps of 40 to 80 watts' capacity, the Allge-meine company of Berlin is now in a position to turn out 100 and 200-watt lamps (from 65 to 135 candlepower) of the type shown in Fig. 1. Lamps of 40 to 80 watts' capacity and from 25 to 50 candle-power still constitute the chief output, but the company hopes to bring the manufacture of the new model up to the same extent.

The lamp shown in Fig. 1 is designed especially to take the place of groups of ordinary incandescent lamps. It comprises, essentially, in addition to the burner with its support (the lamp proper), the pendant with the lamp globe and the shunt resistance. This resistance has a long life, and if destroyed can be easily replaced. The burner of the lamp has an average life of 300 hours; to re-place it requires little skill, and it is not subject to injury if one handles only the porcelain disk to which it is attached."

"... Fig. 2 shows the lamp with burner, without the globe, and Fig. 3 shows the burner alone. By re-moving the screw (s), Fig. 3, the burner can be taken out from the support. In installing a new burner complete connection is made by inserting the stem (a1). Fig. 2, in the quill (a), and the stem (b) in the quill (b1). The screw (s) is then inserted to hold together the strips (c) and (c1), and the burner is thereby prevented from falling out. The arrangement answers equally well for direct or alternating currents...."

"... The Nernst 65-candlepower lamp for 110 and 220 volts costs 12.50 marks, and the 135-candlepower lamp for 220 volts costs 14.5 marks. complete, with a simple globe. Roughly, a mark is equivalent to 24 cents."

Reference
1. Excerpted from "High-candlepower Nernst Lamps." Western Electrician, v. 28, no. 21 (May 25, 1901) p. 353. No author cited.


See also, Nernst Lamps.

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