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A. W. Hull - IEEE Xplore Author Profile

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Time delay in triggered vacuum gap

A.W. Hull

IEEE Transactions on Electron Devices
Year: 1966 | Volume: ED-13, Issue: 6 | Journal Article |
Cited by: Papers (6)
A proposed theory of metal vapor arcs in vacuum, based on the assumption of field emission of electrons, has been used to calculate the time delay of Lafferty's Triggered Vacuum Gap, with excellent agreement with experiment.Show More

Time delay in triggered vacuum gap

A.W. Hull

Year: 1966 | Volume: ED-13, Issue: 6 | Journal Article |

Fundamental processes in gaseous tube rectifiers

A. W. Hull

Electrical Engineering
Year: 1950 | Volume: 69, Issue: 8 | Journal Article |
Cited by: Papers (2)
The theory involved in the phenomena occurring in gas-filled rectifier tubes is discussed here. It is shown how the two basic laws of electronics, the Richardson-Laue-Dushman equation of thermionic emission and the Child-Langmuir space-charge law, affect the behavior of these tubes.Show More

Fundamental processes in gaseous tube rectifiers

A. W. Hull

Year: 1950 | Volume: 69, Issue: 8 | Journal Article |
Electrical properties of mercury vapor and monatomic gases are discussed from a theoretical standpoint in this article. In the first part of the article, the author discusses briefly the elementary processes of excitation and ionization of atoms upon which the electrical properties of gases depend. With this insight into the fundamental processes as a background, the author discusses in Part II th...Show More
Electrical properties of mercury vapor and monatomic gases are discussed from a theoretical standpoint in this article. In the first part of the article, the author discusses briefy the elementary processes of excitation and ionization of atoms upon which the electrical properties of gases depend. With this insight into the fundamental processes as a 1, ackground, the author discusses in Part lIth...Show More

Discussion

A. W. Hull

Transactions of the American Institute of Electrical Engineers
Year: 1932 | Volume: 51, Issue: 2 | Journal Article |

Discussion

A. W. Hull

Year: 1932 | Volume: 51, Issue: 2 | Journal Article |
The three factors most important in mercury arc rectifiers are vapor pressure, arc-drop, and geometry of the anode housing. Investigations of such factors described in this article, have increased the capacity of rectifiers considerably and made it possible to eliminate several undesirable features of their operation.Show More

Abridgment of gas-filled thermionic tubes

Albert W. Hull

Journal of the A.I.E.E.
Year: 1928 | Volume: 47, Issue: 11 | Journal Article |
Cited by: Papers (2)
This paper describes a fundamental principle of thermionic gas tube operation, by which cathode disintegration may be entirely avoided; and a new type of cathode which requires much less heat energy than any hitherto used. With these improvements hot cathode gas tubes appear to be practical, and their fundamental characteristics as lamps, rectifiers, and “thyratrons” are briefly described.Show More

Abridgment of gas-filled thermionic tubes

Albert W. Hull

Year: 1928 | Volume: 47, Issue: 11 | Journal Article |
First Page of the Article
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In vacuum tubes with straight filaments of large diameter, it is found that the magnetic field of the heating current exercises a restraining effect on the escape of electrons, equivalent to the action of the grid in the pliotron, or the impressed magnetic field in the magnetron. This new valve principle may be utilized to control the output of the tube for practical purposes, such as changing hig...Show More
In vacuum tubes with straight filaments of large diameter, it is found that the magnetic field of the heating current exercises a restraining effect on the escape of electrons, equivalent to the action of the grid in the pliotron, or the impressed magnetic field in the magnetron. This new valve principle may be utilized to control the output of the tube for practical purposes, such as changing hig...Show More
A new type of four-element tube is described, which combines the functions of kenotron rectifier and pliotron, and can be operated from an alternating current source of power without either "A" or "B" battery. The cathode is an equipotential surface so that alternating current hum is inappreciable even with three stages in series. The combination of equipotential cathode and large cathode area res...Show More
The dynatron is a tube having a filament, an anode, and a supplementary anode called a "dynode." The tube operation is based on the secondary emission of electrons from the anode. Its use as an oscillating detector for heterodyne reception is described, and the mathematical theory of its operation is given. The theory is verified experimentally with oscillo-graphic illustrations.Show More

The magnetron

Albert W. Hull

Journal of the American Institute of Electrical Engineers
Year: 1921 | Volume: 40, Issue: 9 | Journal Article |
Cited by: Papers (28)
In presenting to you this youngest member of the electron tube family, I am both aided and embarrassed by its family history. I am aided by the fact that you are already acquainted with electrons, so that I need waste no time in explanation or argument regarding their existence. You believe in these little cannon balls which jump out of the hot filament, fly across the vacuum, and plunge into the ...Show More
When a narrow beam of X-rays passes through a fine powder of any crystalline material, it produces on a photographic plate placed just behind the powder a pattern of concentric circles. These circles are produced by the reflection of the X-rays from the planes of atoms in the crystal, and their diameters are a measure of the distances between these planes of atoms. By measuring the diameters of th...Show More
A new, hot cathode, three electrode vacuum tube, the dynatron, is described. A constant, positive voltage is applied between the hot cathode and the perforated rugged anode. A supplementary anode is placed beyond the main anode, and is maintained at a lower positive potential than the main anode. Because of secondary electronic emission from the supplementary anode, thru a certain range of applied...Show More