Abstract: A concentrate of the type useful for preparing an oil-in-water emulsion lubricant used in the drawing and ironing of ferrous and non-ferrous metals comprising:______________________________________ Ingredient % by Weight ______________________________________ A carboxylic acid ester from the 60-90 group consisting of: (a) Dibasic acid having at least 70% by weight of its carboxylic acid groups esterified with a C.sub.4 -C.sub.30 mohydric alcohol (b) A C.sub.8 -C.sub.22 mono carboxylic acid ester of a polyhydric alcohol. Water-in-oil emulsifying agent, .5-30 Polyglycol co-emulsifier 2-4 Phosphate corrosion inhibitor 0.5-2 Copper corrosion inhibitor 0.2-1 Thickener 0-10 ______________________________________the improvement which comprises said composition having an Iodine number not greater than 5.

Abstract: An improved coal-water slurry of the type comprising at least 45% by weight of finely divided coal particles and a dispersing agent, said slurry being characterized as having a Brookfield viscosity at 60 rpm of less than 4,000 centipoise, the improvement which comprises adjusting the pH of said slurry to at least 6 and using as the dispersing agent, a water-soluble salt of an olefin/maleic acid copolymer having a molecular weight within the range of about between 3,000-50,000.

Abstract: A novel mold coating comprising humic acid, and/or humic acid salts, and graphite in a liquid suspension containing organic bonding agents is disclosed as well as a method of forming ingots in which molten steel is poured into molds which are covered by the coating.

Abstract: A circuit which allows the operation of a VOR receiver in the presence of unwanted interference signals without sacrificing a fast response to omnirange bearing selector changes. A switching-type synchronous filter is used to filter the 30 Hz AM channel signal in the receiver. The narrow bandwidth of this synchronous filter rejects unwanted interference signals without introducing phase shift into the desired signal. The switching signal for the synchronous filter is generated by the FM channel in such a manner that the switching filter center frequency follows the input frequency. The use of a synchronous filter allows rejection of interfering AM signals that lie outside a narrow pass band, while allowing the receiver to follow variations in frequency of the transmitted signal.

Abstract: A known reference signal is applied to a zero crossing detector and normal and inverted outputs from the zero crossing detector are applied to the input control terminals of a pair of bilateral switches. A measured signal of the same frequency but not necessarily of the same phase is simultaneously applied to the input terminals of the bilateral switches. The resultant output of the bilateral switches is connected to a parallel RC network. The capacitor acquires a charge proportional to the deviation from 90.degree., which is applied to a differential amplifier. The output of the differential amplifier is used to drive a meter which indicates the phase relationship of the two signals. The capacitor used to accumulate the net charge is ungrounded to eliminate errors resulting from unequal currents to ground.