Document Byg5Nax3nzKoD3xLnaVNObaYj

Murray Turbines k------------------------------------------------------------------- ^ A typical, modem, small public utility is the Municipal light and Power Plant at Traer, Iowa. This plant supplies water, steam heat and electric power to the community and surrounding countryside. The Murray turbo-generator pictured above carries the full electrical toad of the plant and supplies the steam for heating by automatic extraction at 10$ gauge pressure. The simplified design and rugged construction of this and all MURRAY turbines particularly adapt them to this or any other drive where long life, reliability and low operating costs are a must. IRON WORKS COMPANY BURLINGTON, IOWA BuHderi of Steam Power Equipment far Throe Quorfers of o Century 224 More TECHNICAL BRlEfl The dielectric property lj| undergo a change during tbenSiS ThU U particularly ovldeni electrie lots and in the IniuUyJj cnee. The variations in during aging lem cm be tJi with the mechanical Propenbijj materials making it possible toLj the time at which the plaitfcj been removed and embrittJem^J This point of embHttlemeat with minimum point on (he nan^f temperature curves for Forme* Jm tion, e special type tasted by the *51 The usefulness of these eh.Jg dielectric properties during^Sj aging In determining the true of life remaining in, insulation 2 determined only through further d of other insulation! with dipe!*,^ as thosa with non-polar groups, tb veatigation of the effects of envif^] and conditions of contatnlnatka jA in order. It Is important thst aetijj made of the change in propertkit? sulated structures which are ent3 of two or more dielectrics, so b fa in machinery construction. l|\i|1 pected, too, that further work *3 veal the effect! of temperature ejt on these dielectric properties; it] desirable Information at the highe peraturea. A!EE Paper No. 51119 ELECTRIC CONTROLS Oporatorlass Elevators. By Si&u dark, Otis Elevator Co, For many years, light-duty elm have been operated without sltetdj therefore being eutomallo migtajl classed ae operatorleaa. But,letoiw of the latter as the units of s from three or more heavy duty eontfsocuF running non-attended high-speed elm tors, controlled by an automitlc pgj supervisory system that eutonudta handles six different traffio pregruj These programs are: up-peak, babn up-down, heavier-down, beavltrS 9down-peak, Intermittent night sod day traffic. M On operatorless elevators tb3 patching system is used directly Ufl tiste starting the ears instead of twdS through starters or other eUendtfi&u load-weighing device U also ustdffl (1) dispatch cors from the ground ftt when 00% loaded if this occur* the scheduled lime Interval hss (2) bypass all fish calls if the loaded to 80% of eopaclty. To P**js passengers being hit by closing ^ way and cor doors, closing Pe'J these doors has been reduced *S| protective device is used that the doors to open position if a P*ss^aj is in their way. A two-way lendit*** Tips on Better Putnpitlg WAYS to Get ie Most From Your Imping investment 1. MATCH THE PUMP TO THE CONDITIONS f .' TFira, determine all possible condition! of the | Squid to bo pumped--chemical analysis, suction ' lift (If any), head or pressure, specific gravity asd temperature of liquid--then pick the erect pomp made for those conditions, (In'the "8uffslo" line, you'll find that "tdealt' pump, ' because the line is so complete.) 2. SAVE ON FIRST COST BY USING HIGHEST RECOMMENDED DRIVER SPEED The higher the speed, the more the pump will deliver-- within reason--end the smaller tha pump you can use for a given job. But be sura to operate at no higher then recommended speeds. Overspeeding wears out any pump. 3. RIGHT INSTALLATION AIDS PERFORMANCE Give your pump the best chenea--Install dose is possible to liquid supply source* keep pipe friction losses to a minimum--be sure suction line has no humps or hollow* which could cause air locks. (You'll find "Buffalo" Pumps compactly built and easy to-inwall.) 4. REGULAR MAINTENANCE SCHEDULE LENGTHENS PUMP LIFE Regular inspections end servicing of bearing lubrication, theft alignment, packing, impeller not only keep your pumps running smoothly, but head off minor conditions which could develop into problems later on. (You have a long-life "bonus" to start with If your pumps ere "Buffalo"!) 5e A QUALITY PUMP IS ALWAYS AN ECONOMY -SPECIFY "BUFFALO" No installation can be better then its pump. For known quality that ` means long life, efficient perform ance and simple maintenance, pick tha pumps used in many of the country's largest Installations"Buffalo" Pumps. BUFFALO" TYPE RR PUMP P O R HIGH PRESSURES-- --multistage design for dear water service such as.boiler feed. Rugged, high in efficiency. Writa for Balltlin .980 BIIFFAL4 PS, INC. 488 BROADWAY BUFFALO, N. Y. Subsidiary of Buffalo Forge Company Canada Pumps, Ltd., Kitchener, Oat. Sales Representatives in all Priacipal Cities A better centrifugal pump for every liquid POWER AUOUH IS -"OUST 1953