Document 3NRrgzYQXNYazL3EOYdryOvaE

Announcing . 7&WING iw@4&- ' DRAFT INDUCER FOR POWER PLANTS - 4(opr(oz v ck aw amfkte UAiit In (hit new high-pressure "Package" Draft Inducer, the motor (or turbine) and fan unit, completely Indepen dent of the casing, make* installation considerably easier, and being easily removed, facilitates inspection and maintenance. DV: N TA G E S I. Big taving in pace requirement, 6. Wide flexibility in gas inlets 3 Compactnex permits fewer and lighter structural supports 3. Eliminates field line-up problems 4. Eliminates water cooling 5. Only two supporting bearings 7. All moving parts quickly and easily accessible 8. Saves on investment and maintenance 9. Low load ratings on natural draft because of Wingfoll Fan and ample free gas travel area Wing Package Draft Inducer, are available In many .Ire. with either turbine or electric motor drive. For further Information write Ie. J. Wing Mfg.Co. 50 Vreeland Mills Road. Linden, New Jersey FACTOSiKS: Linden, NJ. and Monfrea/.Can. *' ** prepifhcm ,n circuit thry. elecU. chmeor, elcciroaici and ordlti.rJ it differential equations, Material I, for one semester *f three lecture* Hg .! laboratory course, each week. #n*- The author ha* aimed t0 dweloo ,k cindenta funtlamental concept* witching, network*. Introducing Bool ^ algebra for this purpose. Book a*r~a aider* both reliy and counting elreuX* The author treat* power amplifier, of bio! the dynamo-electric and magnetic type*, j V-Ioping ihr n.nccpl of transfer funetie,,r The priiusipltts involved in the study of feedback controla are Introduced ** , natural eitension of (he study 0f canireUm without feedback. Problem, included treat point* not covered in tail; bibfograph* |fl. corporelcil. Kitirrciri.cs or Ai.TWHATiic-CuaniiT Ma. ciitninr. (Fourth Edition). By R0lp\ r Lawrence, Professor Emeritus of Electrical Machinery, Afatieefiiueiu Institute of Ttek. nology, anti revised by Henry E Richerii 1`toftssor of Electrieol Machinery, North, eastern University. PV4 * 6. #740, 623 po McCraw-HUl Book Co, 330 Veit 42 St' New York 36, N. Y. Written for the electrical engineering student, this new edition now contiin* problem* along with the tail. It provide* a comprehensive analysis of the operation and characteristic* of transformer,, iychronous generators, synchronous polyphase induction, single-phase t)on, series and repulsion motors. Other object* covered in somewhat lea* datall are the induction generator, aynchronoat converter and mercury-arc rectifier. The treatment throughout is etrongly analytieal, designed to give the student a sound foundation in the way eaeh machine work, nd the reason* behind special characteris tics- True understanding is ftcilitiied by deriving formulas and working equation* from bosie theory. The author'* approach is through the transformer einee the student can pin greater opprecUtlon ol generator* and awtors by first mastering the principle* al magnetic induction as applied here. Type 2516 Multl-Trol with RohoI LiVU-IftOL Synchros Self-Synchronous Devicts *atr EwcmiCAi. SiRvo-MtciiANtsMS. By Leon ard R Crow, m pfi, 9 x 6, 9420. Scien tific Book Publishing Co, Vineennes. fad. One of the aims in preparing a book ef this nature is to cover all the imports*' idea* and concept* that are needed for ih* understanding of self-synchronous control lyttema. And tUit the author ha* done. The book is timely in view ol the current increase in use of synchros and eH-y* chroniting devices by both industry " the armed forces. The author introduces hi* subject *i o chapter on generalised information B synchros; construction, bearings, P*1'"" control, etc. From there he step* in' of single-phase synchronous drive j*'*6*1 the synchro control transformer, diflero** tial synchros, helpful eiperimen'* "d ** through megnesyns and other 'ur*'* core .eleelricsl servomechaniims. POWER lUNr ,WJ VERSATILITY OF MOUNTING FOR EASY "ON THE SPOT" ADJUSTMENT Ibis now Fisher Controller consists of o primary pilot' [tiandard Fishor Series 2500 LovoUTrol--used For Indi- Wing or controlling lovoi) whoso output is Iransmlttod ^pneumatic link to secondary pitot--tho MullMrol. jWUTI-TROL FEATURE5 ir-Available with reset (Typo 2516) or without roiot flypo 2506). (Rosot may be added to units originally mfthod without it.) 3_lovol control point is adjustoble manually in tho case by lovel set adjustment. For remote set--provided with connection for romolo air loading. 4--Prossuro balancod typo of reloy provides intermit tent blood and gives accurate stable control. 5--Pilot may be changed from a direct acting to a reverse acting unit or vice versa, thru the use of. switch plates. IfProportlonol band adjustment is incorporotod Into romote receiver controller with a range of 10% *J00%. 6--Pilot may also bo changed from proportional action to two position action or vico vorso, by ropositlonlng a switch plate. Write for Bulletin Fa506 FISHER OOVKRNOR COMPANY, Marihalltawn, Iowa }_0RLD LEADER IN RESEARCH FOR BETTER PRESSURE AND LIQUID LEVEL CONTROL !*(, JUNE 1933 1,,