Document bBxn1vQx7mg9y81bap5pBn0M3

!$.! 'k ; IT'.. r: power- f W SWAIN fdlior l N lOWltt r*ANNlTT CiKvtho CortUibvting S M ElONJCA AtiMiaia Editor T 0 HICKS j C McCA&E j J O'CONNOR Aitociaie Editor AuectoJ* Editor Auocioit Editor 10 A SKlOFZKt Aiiociofe Editor (fSANKtt Attiifonf Editor C f MAISCMAttK Ail Editor WMfclnplwu CfOICr I UTAHI II \ ,woiu>Ktwiornciii t*>*,*. r*ty# Mpoil*. II* d t*obe, C<* SHELTON FISHCI Pv blither ' (tAK SOUOHTON Selw Managor OISTUCT MANAGERS W W OUAIIH. SM W 4}d St, Nav Yort 14. N. Y. . . c I 10*0, ArvWiMN tldg, fhilodalphia 1, fa, J I SlAllt,' )$# tort Sqaa> lldg, U, Mass. . ,W C rONOt*. 0 Kanne |Wg, Ot*land IS, Ohia l W rOMIOH. S90 N Mlchigass 11*4, Cfckaga tl. III. I t Of*N. tS4 EenaWai IUg, Oanait Si, Mich. J H CASH, fiW Noiioaol Sort Dig, Delta I, let. * JOHN OnCtSON, it Pail S>, Saa Fienciica 4. Calil. J H AllIN, III I WiMiie llei, lee Aageltt IT, Call!. We've learned a lot about making clinker grinders in the past quarter century, and we believe this new model is the best around. Users report that it is not only extremely rugged, ...with Power but also saves substantial amounts of power. All mail] HKMrina,<* are protected by pressurized lantern rings for sn .readers... ance and long life. Designed to grind down t@ This new A-S-H Clinker Grinder is just another example of how our engineers "git thoro fustest with the mostest" in ash and dust handling oquipment. Their recommenda tions will be of vital assistance to you on your noxt project. Write for our latest catalogs. ALLEN-SHERMAN-HOFF 0 !" A--759 E. Lancaster Avo., Wynne*! and Repreie/ifotrves in Principal Cities ` Cuttihc Vibration . . . I with to comment on Freneii P Witme'* article, "How to Cut Vibration in Big Turbine-Cencretor Foundation*," which ap-peered in November. For teveral yean I have had the oppor tunity to design more than a doten large turbine-foundations up to 150,000-kw cape, eltf. The detailed design of o 100,000-kw unit was described in "Foundation for a Lerge Turbogenerator," a paper by Paul Rogers, Nov 1951 Issue of Journal of the American Concrete Inultute. It hai been customary to provide e con- sldersble mass to load ratio (or such tur bine foundations, and experience indicates that supports designed on auch basis are relatively (roe from disturbing vibrations, l-ntcly, however, design engineers have be- coma more conscious of the possibility of resonance between the vibration of the unit end the natural frequency of vibration of the support. Soma recommendations from turbine manufacturers eall (or the avoidance of such support deflections that would prodace equal frequency of vibration with the unit The formula for such deflection is -usually baaed on the spring factor of a sin- T!**re8 frcw*om `Jmtem. The supporting girders, however, are (Continued on page 208) FEBRUARY 1953 ...lines and bylines McCioln, Tosruiend, Kroeti and plans for catting mointononco GOOD MAINTENANCE STARTS HERE--in the planning of these three Pfizer engineering executives. Director of Engrg D C McClain come to Pfizer 36 years ago, after powerhouse and high-tension work with Westinghouse, Church. Kerr & Co. He's a Untv of Illinois man. W If Townsend, chief engineer, is a Rensselaer graduate, a member of ASME, AlEE. He gained early experience with American Sugar Refining Co and several consulting'firms before joining Pfizer 23 years ago. Directly responsible for operations described on pp 107-113 ia William Krauss, electrical engineer. A Pratl Institute graduate, he'a designed and supervised several large Pfizer power and light installations In the 23 years he's been with this growing firm. FAMtLY HOBBIES are Vince Collse's greatest enthusiasm outside hi* work as Director of Research and Product Development for Graver Water Condi tioning Co. Vince, his wife, daughter, and aon work In the arts -- music, painting, sculpture -- as a group. Be sides having n lot of fun, tho boy shows some talent for sculpture ond the girl marked ability at the easel. Vinco is modest about his own tal ents -- he just says he finds painting, particularly the abstract variety, ex tremely relaxing. V J Colin Water conditioning has been Calise's prime professional interest since student days at Brooklyn Poly and City College, N. Y. He was with Permutit and Liquid Conditioning Corp before joining Graver. THE ARTS rote high with our authors this month -- Alfred Aieher enjoys nothing so much as listening to gnod music, collects classical records. We're deep in the record-collecting game our selves but we'vo never tried Al's other hobby--wood carving. He studied mechanical engineering at Drexel Institute and started to pul it to work at American Engineering Co. Then, in 1919, he moved over to the engineering department of the Yamail- Waring Co. Later, Al went into field service work and (or the past 12 years A L Alcher hna been in field sales. From this daily contact with equipment users, Al has picked up a good many ideas about what plant engineers want to know, passes some along in the article beginning on p &4. ASS UT^