Document ERQ7350YN8azKX5ZRkmwbQZx

...Stepless, Wide Range Speed Control of Direct Coupled Draft Fans Whin TyP* 2)7 Liquid Rheostat! control the tfteed of holler font driven hj wound rotor motort you get: Immediate responie to varying draft conditions. % Smooth, continuous, ttapfon speed control. Equal sensitivity over the entire operating range. HOW' IT WORKS. Motor speed is vsried by increasing and decreasing resistance. This is accomplished by raising and lowering electrodes and the level of current-carrying electrolyte. A pilot device transmits draft condition to t lifting mechanism which controls electrode position and electrolyte level. A full resistance range is provided in only to inches of electrode travel. The bask principle of liquid rheostat operation plus the utilization of spe* ciiUy engineered electrodes gives a linear relationship between motor speed and electrode travel over the complete rheostat range. Since the rheostat is not mechanically connected to the motor it may be located to suit the most convenient plant layout. For com plete details, contact your Allis-Chalmers representative or write for leaflet 14S7544. ALLIS-CHALMERS Milwaukee 1, Wiicentln AC power f W SWAIN IrfJtor ((cels'* (dllai CenfrlbvUnff FdJtoi Aiioclete filial Aiiodgla lilloi Aiseclgla filial Anode!* tiiloi AiimIsii td'iof Aiiftloel ftfiler Ad fdiloi \ Jyimie NWS SWtEAUS. Al/oClM*l*ad. ; ; oaMii. Naeda*. Sw Fmclxa, Wat*legfa. ^OSlONtWSOtNCCS. Ueden.fadi.rfaedart. r*ira Uaalta. (la de aka. Made* Dip i 6XEITON FISHCt Poblltho' CUJtK 60UGHT0N ' Mow#*' OUTBICT MANAGIKS ta w OUttltl S3S W Si, Mr* Va>t M, H. V. C lONO. ivcMiacn WAg, MlaSa'aAla J, Va. I E IWtn. M ("A Souora aide. Soda* IS. Mw. W K K3NOC*. HI Mow* BMg. OnralaaS IS, W* w KMlOH. S3D N MlcMga* SM, CSKosa II. W.' I f CON. US NwMcai Ode. OakaU 1*. Mick. I l MOUH. CoxlMoral Side, Si. latrti 6, Mo. I H CASH, Rn' MoUoaal Boat Bldg, tWIIoi I. Tea. JOHN OTIttSON, *B (wti Si. Sm Fraraltca C. Cal". J H AlUN. HI* WlltSla* BM. Loa Aagalaa It, Calll. .with Power readers... Vakt Poww Voujmu? Often I notice someone asking lo get * back issues of Powz*. I have every issue (ram 1930 up to date. The 1930 to 1936 _issues were condensed recently end msdo , iato one volume exclusive el roost advertis ing. The 50-yesr June issue, 1934, is Intact. The 1936, 1937, 1938 eod 1939 issues hove all sdverilibf removed. From 1940 on, the - Jimitry end December Issues ere intact, being aud lor the outside binders of the lee issues which have most of the advertis ing removed. Condensed as they ere, the volumes are 5 ft wide. 5a/<m, Oregon II R Rtutv II joa'ra interested in fitting out muring i*U o} Powca, end won! to purchase oofcunei from reader Riley, you eon reach him directly at Route S, Bom 404, or you con nrite to u and iedit {award your off*r ta him at Salem, Oregon.--Eo. Tiiosi Bcciahihcs .. . Sorry 1 can't be of say help to focetiog copies of Steam, ti you requested in Aofust Powtn, but just to be contrary if noth ing else, I thought I'd drop you e lino on tho subject anyhow. Under ths heading "Are wo older than we thought?" you sey that all indications point to the year 1660 is the starting date (Continued on page 222) NOVEMSEB 195} ...lines and bylines {NOIN1ERINO runs in the Sims blood-- "JB" who tells about hit Grand Haven diesel plant (pp 7S-77) has an 83-yr- old engineer father and a son who U electrieal engineer for Kalamazoo Vege table Parchment Co. Betting io the family is that grandson JB III, now one year old, will also grow up in the engi neering mold. Our JB was born and educated in Tex as (Texas A&M) but worked for lorge engineering firms in all comers of the U.S. Now settled firmly In Michigan, he has made the Grand Haven municipal J B Slim plant widely known for efficient operation and for the economical use of heavy residual fuel oils. Always interested in'aviation, JB helped the editor of hit hometown paper build a Bleriot monoplane, flew World y** 1 "Jennyi" ond Mill fly--both as a hobby and as a means of getting around the otate, where he does consulting work in power engineering. MIOH-PftBlSURI PUMPS are the current concern of Haas Gartratno, as you ean ' tell 'from his article on pp 71-74. Now chief engineer of DeLevtl't centrifugal pump and compressor departments, he has held important design posts with that company since 1924. Born and educated in Switzerland (Winterthur College, OS In ME, 1923), Gartman began his engineering career as a compressor calculator for Brown Boveri at Baden. Hans makes a hobby of lawn bowling snd enjoys boating and fishing with his Ham Gertmann children (a boy ond o girl) during summer week ends ot their oettago at Beaeh Haven Pork, N. J. A member of oumerous engineering socie ties (Navsl Architecu ond Marine Engineers, Naval Engineers), be has served os chairman of the Trenton subsection of ASME (1946-47) ond president ol the Engineers Gub of Trenton (1949-50). PSYCHOiOOIST with on engineering outlook if Dr B J Covner, author of the article on "human engineering" begin ning on p 84. Heiling from Rochester, N. Y., Dr Covner holds degrees Irom Colgate .(AB) University of Pennsyl vania (MA) and Ohio State (PhD). His experience includes a wide variety of-industrial psychological activities. During World War H he was civilian consultant at precommlaeioning-training engineering school where he built a mock-up boiler and engioe room to aid B J Covner training of naval engineering personnel. Hfs recent work has taken on an additional dimension--how to design engineering equipment -for case, aecarocy and safety In operation, what Is coming to be colled human engineering. In this field, be and his associates have worked with utilities, Industrial companies and In surance organizations. Dr Covner first mode acquaintance with electrical equipment sa.e rodie "ham"--was licensed it ago 15 end operated W8AWD until World War II. Now likes to write, fish, listen to classical music. 3