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NEW ELECTRIC LAMP USES TELLURIUM

NEW ELECTRIC LAMP USES TELLURIUM Rotary System are: 1. Teaching periods may be cut from 30 to 24 per week. 2. Teacher has more time to prepare his work. 3. Monotony is avoided. 4. Visual instruction used effectively. NEW ELECTRIC LAMP USES TELLURIUM Tellurium, an element related to sulfur, discovered about a century and a half ago, and, though not rare, has so far found very few applications, is used in a new electric lamp. To its inventors, John W. Marden, East Orange, N. J., Norman C. Beese, Vernona, N. J.j and George Meister, Newark, N. J., the U. S. Patent Office has granted U. S. Patent 2,215,648. Rights have been assigned to the Westinghouse Electric and Manufacturing Company. The inventors are connected with the Westinghouse Lamp Works, at Bloomfield, N. J. Actual light comes from a glass tube shaped like an inverted J, contained in a larger bulb. The tube contains tellurium vapor. With a tube four inches long and a little more than a half inch in diameter, satisfactory operation was secured with two to three amperes of electrical current at 150 to 200 volts. A curious characteristic of the tellurium light is that it resembles that of a glowing solid more than of a glowing gas. The latter usually, when broken into a spectrum, shows a series of bright lines, but that from tellurium vapor shows more of a continuous spectrum. When operated at the correct voltage, its light is very close to daylight, so perhaps the lamp will have applications where artificial daylight is needed. HAND APPLIANCES CHECK MOST FIRES Fifty to ninety per cent of all fires occurring in industry are extinguished with hand fire appliances, without calling for fire department aid, says Herbert W. Lange, assistant engineer of the Underwriters’ Laboratory at Chicago. At least fifteen per cent of the fires upon which an alarm has been sounded are likewise put out by the time the department arrives, he states. Proper use of the extinguished is essential for its effective use, however. In class A fires, those involving wood, paper, textiles and the like, "The extinguisher stream should be applied in a systematic manner,^ he urged. "On vertical fires, attack should be directed at the bottom and progress made upward only after bottom areas have been definitely extinguished. Otherwise, reflashes will soon reach original intensity with portions of the extinguisher discharge wasted." http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png School Science and Mathematics Wiley

NEW ELECTRIC LAMP USES TELLURIUM

School Science and Mathematics , Volume 41 (1) – Jan 1, 1941
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Publisher
Wiley
Copyright
1941 School Science and Mathematics Association
ISSN
0036-6803
eISSN
1949-8594
DOI
10.1111/j.1949-8594.1941.tb04284.x
Publisher site
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Abstract

Rotary System are: 1. Teaching periods may be cut from 30 to 24 per week. 2. Teacher has more time to prepare his work. 3. Monotony is avoided. 4. Visual instruction used effectively. NEW ELECTRIC LAMP USES TELLURIUM Tellurium, an element related to sulfur, discovered about a century and a half ago, and, though not rare, has so far found very few applications, is used in a new electric lamp. To its inventors, John W. Marden, East Orange, N. J., Norman C. Beese, Vernona, N. J.j and George Meister, Newark, N. J., the U. S. Patent Office has granted U. S. Patent 2,215,648. Rights have been assigned to the Westinghouse Electric and Manufacturing Company. The inventors are connected with the Westinghouse Lamp Works, at Bloomfield, N. J. Actual light comes from a glass tube shaped like an inverted J, contained in a larger bulb. The tube contains tellurium vapor. With a tube four inches long and a little more than a half inch in diameter, satisfactory operation was secured with two to three amperes of electrical current at 150 to 200 volts. A curious characteristic of the tellurium light is that it resembles that of a glowing solid more than of a glowing gas. The latter usually, when broken into a spectrum, shows a series of bright lines, but that from tellurium vapor shows more of a continuous spectrum. When operated at the correct voltage, its light is very close to daylight, so perhaps the lamp will have applications where artificial daylight is needed. HAND APPLIANCES CHECK MOST FIRES Fifty to ninety per cent of all fires occurring in industry are extinguished with hand fire appliances, without calling for fire department aid, says Herbert W. Lange, assistant engineer of the Underwriters’ Laboratory at Chicago. At least fifteen per cent of the fires upon which an alarm has been sounded are likewise put out by the time the department arrives, he states. Proper use of the extinguished is essential for its effective use, however. In class A fires, those involving wood, paper, textiles and the like, "The extinguisher stream should be applied in a systematic manner,^ he urged. "On vertical fires, attack should be directed at the bottom and progress made upward only after bottom areas have been definitely extinguished. Otherwise, reflashes will soon reach original intensity with portions of the extinguisher discharge wasted."

Journal

School Science and Mathematics – Wiley

Published: Jan 1, 1941

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