Abstract

An effective source of direct current having any desired output up to 45 amperes at 150 volts is described, being characterized by small size, light weight, low cost, and negligible maintenance. While it has superseded all other d.c. sources, regardless of cost, in the Norton Company laboratories, it is particularly recommended where cost is an important consideration. It is also a useful auxiliary unit where highly refractory materials are analyzed regularly, since these materials are sometimes difficult to volatilize completely with the familiar multipurpose type of source. An automatic current controller is also described as a separate unit, and can be used to hold the current within ±0.5 ampere at any selected value between 5 and 15 amperes.

© 1950 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. Green and Kuper, Rev. Sci. Inst. 11, 250 (1940).
    [Crossref]
  2. E. V. Potter and A. Scott, Rev. Sci. Inst. 18, 722 (1947).
    [Crossref]
  3. Made by Hoskins Manufacturing Company, Lawton and Kinnison Avenue, Detroit, Michigan.

1947 (1)

E. V. Potter and A. Scott, Rev. Sci. Inst. 18, 722 (1947).
[Crossref]

1940 (1)

Green and Kuper, Rev. Sci. Inst. 11, 250 (1940).
[Crossref]

Green,

Green and Kuper, Rev. Sci. Inst. 11, 250 (1940).
[Crossref]

Kuper,

Green and Kuper, Rev. Sci. Inst. 11, 250 (1940).
[Crossref]

Potter, E. V.

E. V. Potter and A. Scott, Rev. Sci. Inst. 18, 722 (1947).
[Crossref]

Scott, A.

E. V. Potter and A. Scott, Rev. Sci. Inst. 18, 722 (1947).
[Crossref]

Rev. Sci. Inst. (2)

Green and Kuper, Rev. Sci. Inst. 11, 250 (1940).
[Crossref]

E. V. Potter and A. Scott, Rev. Sci. Inst. 18, 722 (1947).
[Crossref]

Other (1)

Made by Hoskins Manufacturing Company, Lawton and Kinnison Avenue, Detroit, Michigan.

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 (5)

Fig. 1
Fig. 1

Rectifier circuit.

Fig. 2
Fig. 2

Photograph of rectifier.

Fig. 3
Fig. 3

Controller circuit.

Fig. 4
Fig. 4

Back view of motor drive and rheostats.

Fig. 5
Fig. 5

Back view of controller.

Equations (9)

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

R . m . s . a . c . volts per leg in star connection = 0.428 ( V + 12 )
R . m . s . a . c . volts per phase in delta-connection = 0.740 ( V + 12 )
Peak inverse voltage on rectifiers = 1.05 ( V + 12 )
Lowest frequency in output ripple = 6 × supply frequency
Peak ripple voltage without filter = + 4.7 percent and - 9.3 percent
Peak plate current per tube = I
Average current per tube = 0.33 I
V = 1.35 × r. m. s. voltage per phase - 12
I = V / ( R L + 2.2 R )