7 5 5 I N S T I T U T E A N D R E L A T E D A C T I V I T I E S Journal Á. I. Å . Å .

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JOURNAL O F T H E

Ämericanlnstittxte of Electrical Engineers

PUBLISHED MONTHLY BY THE Α. I. Ε. E. 3 3 W e s t 3 9 t h Street , N e w Y o r k

U n d e r t h e D i r e c t i o n of t h e P u b l i c a t i o n C o m m i t t e e

F R A N K B . J E W E T T , President

G E O R G E A . H A M I L T O N , Treasurer F . L . H U T C H I N S O N , Secretary

PUBLICATION COMMITTEE D O N A L D M C N I C O L , Chairman

E . E . F . C R E I G H T O N W M . M C C L E L L A N

F . L . H U T C H I N S O N L . F . M O R E H O U S E

G E O R G E R. M E T C A L F E , Editor

i Subscr ip t ion . $ 1 0 . 0 0 per y e a r t o U n i t e d S t a t e s , M e x i c o , j I C u b a , P o r t o R i c o , H a w a i i a n d t h e P h i l l i p i n e s ; $ 1 0 . 5 0 t o C a n a d a I I a n d $11 .00 t o all o ther countr i e s . S ing le cop ie s $ 1 . 0 0 . V o l u m e s | i beg in w i t h t h e J a n u a r y i s sue . | I C h a n g e s of a d v e r t i s i n g c o p y s h o u l d r e a c h th i s office b y t h e | I 1 5 th of t h e m o n t h for t h e i s sue of t h e fo l lowing m o n t h . j

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The Institute is not responsible for the statements and opinions given in the papers and discussions pub-lished herein. These are the views of individuals to whom they are credited and are not binding on the membership ms a whole.

Annual Convention at Swampscott As this issue of the JOURNAL goes to press all arrangements

have been completed for the 39th Annual Convention of the Á. I. Å . E., a t Swampscott , Mass. , and the dis tant members will have star ted on their way. The Convention Commit tee in Boston has shown great enthusiasm in planning a full program of trips of historic interest, inspection tr ips to plants in the vicinity, and a variety of enter ta inments . An unusually large at tendance is expected. A detailed account of this conven-tion will appear in the next issue of the JOURNAL.

Pacific Coast Convention The Pacific Coast Convention will be held, as previously

announced, a t Del Monte , Calif., October 2-5. The program is practically decided upon and will combine engineering papers and enter ta inment features to make a most profitable and enjoyable meeting.

The technical sessions will be four in number, and most of the subjects will be in the nature of symposiums. The provisional technical program will be as follows:

TUESDAY, OCTOBER 2

A F T E R N O O N

Registration Outdoor recreation

E V E N I N G

Registration Dancing

W E D N E S D A Y , OCTOBER 3

M O R N I N G

Registration President Jewet t ' s Address

President-Elect Ryan ' s Address on Researches Relating to High-Tension Transmission.

Symposium by Transmission Engineers of the Great West on the Mechanical and Electrical Construction of Modern Power Transmission Lines, including Insulators for High-Voltage Lines.

(Title Later) C. B . Carlson, Southern California Edison Company. Electrical Construction of Modern Power Transmission Lines and

Insulators for High- Voltage Lines, by H. R. Wakeman and H. W. Lines, of the Por t land Railway, Light & Power Company.

The Evolution of the High-Voltage Insulator, by J. Koontz, Great Western Power Company.

Desirable Forms of High-Tension Insulators, by F . G. Baum, Consulting Hydroelectric Engineer, San Francisco.

Design of the\Anchor and Supporting Structures for the Carquinez Straits Crossing, by L. J . Corbet t , Pacific Gas & Electric Company.

Special Features of Design of Transmission Tower Lines as Imposed by Electrical Conditions, by Wal ter Dreyer, Pacific Gas & Electric Company.

(Title later) M . T. Crawford, Puget Sound Power & Light Company.

E. R. Stauffacher, Southern California Company, and R. R. Robley, Por t land and Railway, Light & Power Company, will each present a paper on Group Operation of Systems Having Different Frequencies.

AFTERNOON

Symposium by Transmission Engineers of the Great West on Wate r Wheel Construction, Operation and Governing, etc.

General Consideration of the Subject, by John Harrisberg, Puget Sound Power & Light Company.

Water Wheel Construction, Operation and Governing, E. D. Searing, Por t land Railway, Light & Power Company.

A Study of Irregularity of Reaction in Francis Turbines, by R. Wilkins, Pacific Gas & Electric Company.

E . W. Breed, Pelton Wheel Company, general paper on this sub-ject.

General Consideration of the Subject, by H. L. Doolittle, Southern California Edison Company.

Four Papers on High-Voltage Switches, Bushings, Lightning Arresters: D . W. Proebstel, Por t land Railway, Light & Power Company; M . Michener, Southern California Edison Company; A. W. Copley, Westinghouse Electric & Mfg. Company; L. N . Robinson, Stone & Webster , Inc., Seattle.

E V E N I N G

Presentat ion of the Edison Medal to Dr. R. A. Millikan, followed by an address by Dr. Millikan.

Dancing

T H U R S D A Y , OCTOBER 4

M O R N I N G

High-Voltage Insulation, by J . L. R. Hayden and C. P . Stein-metz, General Electric Company, Schenectady.

Power Resources of the United States (an illustrated address), by F . G. Baum, Consulting Hydroelectric Engineer, San Francisco.

Generating and Substation Machinery for Long Transmission Systems, by W. Smith, Westinghouse Electric & Mfg. Com-pany.

Symposium on High-Voltage Transformer, including Trans-former Bushings

Performance of Auto Transformers with Terliaries under Short-Circuit Conditions, by J . Mini and R. Wilkins, of the Pacific Gas & Electric Company.

A. W. Copley, Westinghouse Electric & Mfg. Company.

July 1923 I N S T I T U T E A N D R E L A T E D A C T I V I T I E S

L. J. Moore, San Joaquin Light & Power Company. L. N . Robinson, Stone & Webster , Inc. , Seattle.

AFTERNOON

Golf Tournament 17-mile sightseeing drive

E V E N I N G

Banquet and dancing F R I D A Y , OCTOBER 5

M O R N I N G

Symposium on Radio Communicat ion as Applied to Power Transmission Networks :

J. Koontz, Great Western Power Company. Experience with a 202-Mile Carrier-Current Telephone System,

by E. A. Crellin, Pacific Gas & Electric Company. R. Ashbrook, Southern California Edison Company. Symposium on Theory and Practise in High-Voltage Operation : R. C. Wood, Southern California Edison Company. W. D. Shaw, Southern California Edison Company. A. W. Copley, Westinghouse Electric & Mfg. Co. Economics of Power Factor Control of Long High-Voltage Trans-

mission Lines, by Á. V. Joslin, Pacific Gas & Electric Com-pany.

Methods of Voltage Control of Long Transmission Lines by the Use of Synchronous Condensers, by J. Koontz, Great Western Power Company.

Papers on Telephonic Communicat ion (names of authors later) . A F T E R N O O N

Recreation, sports, sightseeing E V E N I N G

Leave for Post-Convention Trips , to Bay Region Substat ion, to the Sierra Nevada Power House and Hetch Hetchy Valley.

Fur ther details of the program and enter ta inments will be printed in the next issue of the J O U R N A L .

Papers for Α. I. Ε. E. Convention N O T I C E TO A U T H O R S — T h e Meet ings and Papers Com-

mit tee announces t ha t papers intended for the 1924 Midwinter Convention must be received prior to October 12, 1923. M a n u -scripts received after this date will be considered only for subse-quent meetings. In order to review, edit, pr int , and mail copies of more than a score of papers in advance of the conventions, three months are required. M u c h advanced engineering work is being done this year. A considerable par t of the Midwinter Convention program is already made up of papers crowded out of the Swampscott Convention. Members preparing papers for any of the four conventions of 1924 are requested to send a pre-liminary note of the approximate title and probable da te of com-pletion to the Meetings and Papers Commit tee .

As to later meetings, papers intended for the Spring Conven-tion must be received prior to J anua ry 15, 1924, and for the Summer Convention prior to March 24, 1924.

1922 Commission of Washington Award to Captain Robert W. Hunt

The Commission of Washington Award for 1922 was voted to Captain Rober t W. H u n t and the presentat ion was made a t the annual meeting of the Western Society of Engineers, held June 18, 1923. This 1922 award was made to Capta in H u n t "For preeminent service in promoting the public welfare, for his pioneer work in the development of the steel industry in the United States and for a life devoted to the advancement of the engineering profession."

The award is made annually by a commit tee composed of nine representatives of the Western Society of Engineers and two each from the A. S. C. E. , the Á. I . M . E., the A. S. M . E. and the Á. I . Å. E . The award of the medal was established in 1917 by Pas t President J . W. Alvord of the Western Society " t o be annually presented to an engineer whose work in some special

instance, or whose services in general have been noteworthy for their merit in promoting the public good."

128th Meeting of Α. I. M. & M. E. The American Ins t i tu te of Mining and Metallurgical Engineers

will hold its 128th meeting in Ontario and Quebec, August 20-31. Eleven days ' program is outlined, combining technical sessions, en ter ta inments and numerous inspection trips to plants and mines in this vicinity.

Annual Meeting of New York Electrical Society

At its annual meeting for the election of officers June 7th, the New York Electrical Society unanimously elected the following ticket, with Vice-Presidents, Dr . Erich Hausmann , J . P . Alex-ander and J . L. Pitcher, as holdovers :

President, Philip Torchio; Vice-Presidents, Alfred Cane ; Å. H . Clarke, Har ry T. Kidder; Secretary, T. C. Mar t in , Treasurer, T. F . Honahon.

Welded Pressure Vessels For several years efforts have been made to draw up a code

for the welding of unfired pressure vessels. Opinions of the best welding experts were not in agreement on many essential points. Fundamenta l , scientific knowledge, based on test da ta was not available. The American Bureau of Welding (Research Depart-ment of the American Welding Society), has completed a series of tests on some fifty tanks . The program involved an expendi-ture of over $15,000. The test da ta , analysis of same, conclu-sions and recommendat ions to the Boiler Code Commit tee of the A. S. M . E. have been compiled in a report , copies of which may be obtained from the American Welding Society, 33 West 39th Street , New York, a t $1 .50 to members and $5.00 to non-members.

Ratio of Direct and Alternating Test Voltage with Especial Reference to

Impregnated Paper Cables The ratio between the direct and root-mean-square al ternat ing

voltages which will produce failure of insulation depends upon: (a) the t ime of application of the voltage (b) the na ture of the insulation (c) the temperature (d) and possibly the thickness of insulation Confining our a t tent ion to impregnated paper insulation, and

to short-period applications of voltages, i. e., periods so short t ha t the average dielectric loss will not affect the dielectric s trength, we find the rat io to be 1.4 for fluid oil, somewhat higher, say 1.8 for impregnated paper a t 100 deg. cent, and rising to higher values in some cables to 2 . 4 a t 25 deg. cent.

The value 2 . 4 for 25 deg. cent, is however apparent ly not a constant .

M . W7eiset (Å. T. Z. J an . 15, 1920 p . 48) experimenting with a Delon rectifier found a rat io of 2 .46 for cable lengths of 100 meters or more, bu t obtained lower ratios for shorter lengths (1 .7 to 1.8 for 3 meters) .

Correspondence with M . Jules Delon of Lyon, elicited the s ta tement tha t the rat io according to his tests is 2 .4 .

M r . Wallace S. Clark, writing under date of Aug. 16, 1922, said: "Tes ts made on cable manufactured by the General Electric Co., mineral base compound, showed, on single-con-ductor cables with five minutes test durat ion, a t 25 deg. cent, a rat io of 2 . 4 to 1 ; a t 100 deg. cent, a ra t io of 1.77 to 1 in.

Results obtained with commercial tests of cables on which, however, too much reliance should not be placed, indicate tha t the rat io depends upon the compactness of the paper fibers, i. e., very compact paper immobilizes the oil in somewhat the

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