Abstract

The radiation of energy from a thoriated tungsten filament and the absorption of the energy radiated from the surrounding bulb have been measured by a method which eliminates difficulties arising from cooling effects of the leads. For a filament at a uniform temperature TF in a bulb at temperature TB the net radiation W in watts cm−2 is the difference between the outgoing radiation WR and the absorbed radiation WA. For values of TF from 225° to 580°K and TB from 77° to 473°K

logWR=83.7105100+5.332logTF,logWA=83.7105100+4.462logTB+0.87logTF.
The resistivity R0 in this same range is given by
logR0=91.7123100+1.23logTF.
The characteristics, current, voltage, resistance, and energy radiated as functions of temperature are tabulated.

© 1935 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. I. Langmuir, Phys. Rev. 7, 302 (1916).
    [Crossref]
  2. H. A. Jones and I. Langmuir, Gen. Elec. Rev. 30, 310, 354, 408 (1927).
  3. P. Foote, Bull. Bur. Stand. 11, 607 (1915).
    [Crossref]
  4. C. Davisson and J. R. Weeks, J. O. S. A. 8, 581 (1924).
    [Crossref]
  5. W. E. Forsythe and E. M. Watson, J. O. S. A. 24, 114 (1934).
    [Crossref]

1934 (1)

W. E. Forsythe and E. M. Watson, J. O. S. A. 24, 114 (1934).
[Crossref]

1927 (1)

H. A. Jones and I. Langmuir, Gen. Elec. Rev. 30, 310, 354, 408 (1927).

1924 (1)

C. Davisson and J. R. Weeks, J. O. S. A. 8, 581 (1924).
[Crossref]

1916 (1)

I. Langmuir, Phys. Rev. 7, 302 (1916).
[Crossref]

1915 (1)

P. Foote, Bull. Bur. Stand. 11, 607 (1915).
[Crossref]

Davisson, C.

C. Davisson and J. R. Weeks, J. O. S. A. 8, 581 (1924).
[Crossref]

Foote, P.

P. Foote, Bull. Bur. Stand. 11, 607 (1915).
[Crossref]

Forsythe, W. E.

W. E. Forsythe and E. M. Watson, J. O. S. A. 24, 114 (1934).
[Crossref]

Jones, H. A.

H. A. Jones and I. Langmuir, Gen. Elec. Rev. 30, 310, 354, 408 (1927).

Langmuir, I.

H. A. Jones and I. Langmuir, Gen. Elec. Rev. 30, 310, 354, 408 (1927).

I. Langmuir, Phys. Rev. 7, 302 (1916).
[Crossref]

Watson, E. M.

W. E. Forsythe and E. M. Watson, J. O. S. A. 24, 114 (1934).
[Crossref]

Weeks, J. R.

C. Davisson and J. R. Weeks, J. O. S. A. 8, 581 (1924).
[Crossref]

Bull. Bur. Stand. (1)

P. Foote, Bull. Bur. Stand. 11, 607 (1915).
[Crossref]

Gen. Elec. Rev. (1)

H. A. Jones and I. Langmuir, Gen. Elec. Rev. 30, 310, 354, 408 (1927).

J. O. S. A. (2)

C. Davisson and J. R. Weeks, J. O. S. A. 8, 581 (1924).
[Crossref]

W. E. Forsythe and E. M. Watson, J. O. S. A. 24, 114 (1934).
[Crossref]

Phys. Rev. (1)

I. Langmuir, Phys. Rev. 7, 302 (1916).
[Crossref]

Cited By

OSA participates in Crossref's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (1)

Tables (2)

Tables Icon

Table I Total emissivity of tungsten.

Tables Icon

Table II Characteristics of tungsten filaments.

Equations (21)

Equations on this page are rendered with MathJax. Learn more.

log W R = 83.7105 100 + 5.332 log T F , log W A = 83.7105 100 + 4.462 log T B + 0.87 log T F .
log R 0 = 91.7123 100 + 1.23 log T F .
W = W R W A .
W R = S T F 4 E ,
W A = S T B 4 A ,
E = 0.5736 ( T R 0 ) 1 2 0.1769 ( T R 0 ) ,
E = 0.751 ( T R 0 ) 1 2 0.632 ( T R 0 ) + 0.670 ( T R 0 ) 3 2 0.607 ( T R 0 ) 2 .
log R 0 = 91.7123 100 + 1.230 log T .
log W R = 83.7105 100 + 5.332 log T F .
R 0 = const T F ρ ,
W R = K T F ω ,
E = ( K / S ) ( T F ) ω 4 .
A = const T F T B α ,
ω 4 = + α
A = ( K / S ) T B ω 4 ( T F / T B ) .
W = K ( T F ω T B ω T F ) .
log ( W R W ) log W B = ( log T F log T B ) ,
log W A = 83.7105 100 + 4.462 log T B + 0.87 log T F .
log E = 4.9531 10 + 1.332 log T F .
A ( amp . cm 3 2 )
V × 10 6 ( volts cm 1 2 )