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Equipment Used Afloat and Ashore Combination Burner-Pressure, Temperature Controller—Fire Brick—Regulators— Condenser Tubes — Large Urn — First Turbine — Wide Range Oil Burner COMBINATION pulverized-coal A and oil burner which success- fully meets the requirements of such an installation in water-cooled furnace walls has been developed by the Babcock & Wilcox Co., 85 Liberty street, New York City. The pulverized-coal burner is the company’s standard multiple intertube burner. The oil burner is of the twin- nozzle type and is inserted between two tubes in front of the pulverized coal burner, extending back and through the burner casing, supported by a guide trough between the casing and the burner tip. The oil-burner tips are set so that the oil is distrib- uted across the air stream to obtain a satisfactory mixture of fuel and air. Temperature and Pressure HE BRISTOL CO., Waterbury, Conn., announce the introduction of new time temperature and _ time pressure controllers. The success of the Bristol’s free vane air operated pressure and temperature controllers has led to the manufacture of these instruments. In many processes, it is desired to regulate a temperature (or pressure) at some fixed rate, and then either hold it or decrease it at some other rate. The new controllers will do this, on any range of temperature from —4( to 1000 degrees Fahr., or pres- sure from 10 to 2000 pounds. Fig. 1 shows one of these controllers of the large cam type. The cam here consists of a graduated chart on sheet aluminum, that may be cut by the user to give any desired control character- istics. The cam is driven by either a Bristol telechron electric clock or by a high grade spring clock. Air supply Fig. 1—Free Vane Pressure Time Controller 28 and control gages are mounted self- contained, and the whole is enclosed in a moisture-proof aluminum case. Fig. 2 shows another model similar to the first, except that it is equipped with an indicating pointer which shows the instantaneous pressure or temperature at all times. The cam is | Fig. 2—Indicating Temperature Time Free Vane Controller of aluminum and is graduated so that the user can cut to any desired cycle. The use of the free vane principle allows the instrument to control with- out restricting the indicating pointer at any time. The cam is automati- cally driven and is readily changed. New Marine Firebrick HE BABCOCK & WILCOX CO., 85 bie oe street, New York City, an- nounces the addition of a new fire- brick, known as the 80 junior, to its line of refractory products. The 80 junior was developed to meet the con- ditions existing between the moderate service economically met by fire-clay refractories and the severe conditions met only by the well-known B. & W. 80 firebrick. It is for this field, in which fireclay brick are unsuitable, or are only mod- erately satisfactory, from the stand- point of service life, and in which the 80 firebrick is uneconomical because of its high price, that the 80 junior was developed. The new firebrick is in no sense a substitute for the B. & W. 80 firebrick—it being for service in fields not covered by the 80 firebrick— fields in which the premium-priced, super-refractories and other special bricks of the alumina-silica class are now used, but which prove costly when installed to meet conditions that are MARINE REVIEwW—July, 1933 near their upper service limits. Some idea of the relative resistance of 80 junior firebrick to high tempera- tures may be gained from the fact that it has a melting point of 3175 degrees Fahr., which is approximately 100 de- grees higher than that of representa- tive firebrick, and its pyrometric cone equivalent is 33. The melting point determinations were made in accord- ance with standard test methods with the exception that the readings were obtained with carefully calibrated op- tical pyrometers. Adjustment Regulator REGULATOR for use with oxy- gen, acetylene and other gases, which has a dual adjustment com- prising a fine micrometer adjusting key housed within and operating sepa- rately from the main regulator key has been developed by the Alexander Mil- burn Co., Baltimore. The regulator has two compression springs, one with- in the other, operating a removable, noncorrosive metal diaphragm. The main key operates the standard or heavy spring, and the micrometer adjustment key a fine bronze spring which enables the operator to secure a range of from zero to approximately 5 pounds, in addition to the adjust- ment obtained with the standard ad- justment key. This means of adjustment is so fine that fractions of an ounce can be ob- tained with the micrometer key, either when the pressure is at zero or at whatever pressure the standard key has been set for on the regulator; for instance, if the key is screwed down until there is a pressure of 10 pounds, the micrometer key adjusts fractions of an ounce up to 5 pounds more. The regulator is extremely sensitive for the finer pressures necessary for low pressure torches and small torches doing fine work and requiring close adjustment. Regulator for Accurate Adjustment of Oxygen or Acetylene pressure