Document OJKVxEpQ5jO9B8Gq85BDe1J1p

Paver Engineer's Notebook (CmumicJ /ram pap, not Log Sheet* Enablo Quick Record Keeping While most ortctATOxs are performing their duties, and keep ment well maintained, they stme dislike preparing detailed repen, the maintenance work done. T ( the performance of the Utter chets, sheets were devised that give eoap information on the work done, sod quire the operator to do little uor, make a lew check markes, enter on which a maintenance or Ins job was done, and his initials. The Uble, left, is pert oi one of sheets for auxiliaries in a diesel ph Every piece of equipment that needs spedion and attention U Usted on logs, which acta os a conrenieat against accidental oversight & sheets ore prepored tor the engines' appropriate headings under work complished. The sheets are primed on oaa only and assembled in a looi binder. With this arrangement the sides can be used for remarks. Dexter M Smith Hampton, THERMOCOUPLES DETECT HIGH ASH LEVEL IN CLOSED PRECIPITATOR HOPPER Remote indications o( high ash level in hoppers can be easily obtained by arranging two 1*C thermocouples, as shown in the sketch below. The couples, A and B, are installed side by side and connected in series with opposing polarities. Tho two leads can than be connected to a millivolt meter or a suilablo alarm circuit. Couple A inserted through a sealed pipe Is esposed to the flue gas and ash temperature In the hopper. Couple B, inserted through a pipe with openings both to the atmoaphere and tho hopper interior, registers the lower tempera* ture of the air drawn in through the pipe by the negative hopper draft. The differing temperatures set up a dif ferential potential in the thermocouple circuit. When ash level in the hopper vises above the inner opening of pipe B the air circulation atopa and temperature of couple B rises to that of couple A. This action reduces differential enjf in the circuit to eero, which can be made to toond an alarm. The operating point of the circuit occurring at tero potential has the additional advantage of sound* Ing a warning if an accidental open circuit develops. C Holubkck St. Louis, Mo. Ml (241) CONTRIBUTIONS INVITED Powa pays $20 for each Item pdb Ushad in "Power Engineer*' lids hook." Here's year opportunity to aih in on these professional ttidt you have loccesifully aied In the past, end olio help your fellow power engineer*. Your maotuaipt need only ho in roogh (urn. living ell facts end the sketches Id pencil We will dress them op let pobUm. lion. This department covers power problems in design, operation tod maintenance ranging over Item* that ere: mechanical, electrical, bydraolic, struetttrel, or of nf otters concerning power generation sod services. CORRECTION E J Kates, contributor 0/ original dole for item on "Using A**U*W Voltages Increases Speed Hang*.* on p 110, Jon, 1940, Powea, paints out that tho lowest speed should be 415 instead of $20 rpm p*b lished. This gives s total speed range of 4 to i. POWER April "Think. Twice... ;.. before you select arty water conditioning service. In the selection of the water conditioning service 6ejt suited for your boiler plant, it will pay you to consider carefully these three vital factors for successful, economical boiler plant operation: A service based on a sound engineering background A service with a proved record # A service backed by ample engineering facilities Troublc*free operation is a result of scientific control. W. 11. & L. D. BETZ is an organization of engineers and uhenuots specializing in the solution of all industrial water problems. Years of experience have mode Beu wbUt conditioning service scientifically correct... complete... economical. ., Our nationwide stafT of engineers will welcome the opportunity of discussing with you this important subject of water conditioning ... W. II. St L. D. DETZ, Gillingham and Worth Strceta, Philadelphia 24, Pa. In Canada: Beta Laboratories Limited, Montreal 1, 1 April 1445 15