Abstract: The method of burning different sorts of solid fuel in a tunnel-like burner furnace comprises the steps of pulverizing the solid fuel particles to a size corresponding to optimum burning performance of the employed burners, supplying the pulverized particles in an air stream to the burners of the furnace and adjusting the supplied amount of pulverized particle-air mixture, and the amount of air in the mixture in accordance with the optimum burning performance of the burner. The burner furnace system for performing the method of this invention comprises a tunnel burner furnace having a plurality of ceiling burners and of side wall burners, a fuel distributor having a rotatable distributing channel communicating successively with respective burners and a dosing device connected to the input of the fuel distributor and adapted for adjusting the stream of the mixture of air with pulverized fuel particles.

Abstract: This invention relates to a process for the manufacture of methanol-etherified methylolmelamines which are largely monomeric containing more than 5 mols of formaldehyde and more than 4 mols of methyl-etherified methylol groups, per mol of melamine, and having a viscosity of less than 20 pascal-seconds at 25.degree. C. and a solids content of at least 95%, comprising (a) methylolating melamine with formaldehyde at a molar melamine:formaldehyde ratio of 1:6.5 to 1:8 for 11/2 to 5 hours at 50.degree. C. to 85.degree. C., with the formaldehyde source being an aqueous solution of formalin containing 30 to 50% by weight of formaldehyde and having a pH of 6.7 to 7.3, and (b) etherifying the resulting suspension of methylolmelamine with 15 to 30 mols of methanol per mol of melamine at temperatures of 30.degree. C. to 60.degree. C. in the presence of a strong acid.

Abstract: A process for the preparation of a substantially monomeric methylolmelamine etherified by methanol which contains per mol of melamine, more than 5 mols of formaldehyde and more than 4 mols of methyl-etherified methylol groups which has a viscosity of less than 10 Pa.s at 25.degree. C. at a solids content of at least 95%, said process comprising reacting melamine and formaldehyde in a molar ratio of from 1 : 6.2 to 1 : 8, at a temperature of from 40 to 60.degree. C., in the presence of a basic catalyst in a reaction mixture which contains from 10 to 40% by weight of water and from 40 to 20% by weight of methanol thereby producing a suspension of methylolmelamine, and then etherifying the methylol melamine in the presence of from 15 to 30 mols of methanol per mol of melamine, at a temperature of from 25 to 50.degree. C., in the presence of a strong acid.

Abstract: Signatures of a book are identified with a binary coded indicia on the backbone. A signature verifier having a row of indicia sensors associated with the stack of signatures in the stream feeder of a gathering machine senses the coded indicia. In the event of an error, the verifier gives an alarm or stops the stream feeder. A book of plural signatures has a plurality of indicia on the backbone. A verifier has corresponding plural rows of sensors which detect the indicia and are sampled sequentially.

Abstract: N,N-Dimethylaminomethane diphosphonic acid is produced in an advantageous, simple, and economical manner and in a high yield by reacting dimethylformamide, phosphorous acid, and phosporus oxychloride.

Abstract: N-acyl-1-amino alkane-1,1-diphosphonic acids or their alkali metal salts are highly effective scale and deposit formation preventing, metal ion complexing, sequestering, and anti-corrosive agents which can be used with great advantage in washing and cleaning fluids and detergent preparations. Such N-acyl-1-amino alkane-1,1-diphosphonic acids are prepared, for instance, by acylating the corresponding 1-amino alkane-1,1-diphosphonic acids or by hydrolyzing the corresponding (1,1-diphosphono alkane) acylamidines.

Abstract: Aminoplast preparation is greatly speeded by condensing an aminotriazine such as melamine with formaldehyde and etherifying alkanol under superatmospheric pressure and at a temperature between about 80.degree. and about 130.degree. C.

Abstract: Low-viscosity high-solids-content melamine-formaldehyde condensates having high reactivity, low content of free formaldehyde and good compatibility, are prepared by effecting condensation in an alcohol having up to 3 carbons, then concentrating the condensate and heating the concentrate in a higher alcohol having from 3 to 18 carbons and again concentrating. The final product cures on heating to a hard glossy film and can be added to other uncured resins to improve the hardness of their films.

Abstract: N-acyl-1-amino alkane-1,1-diphosphonic acids or their alkali metal salts are highly effective scale and deposit formation preventing, metal ion complexing, sequestering, and anti-corrosive agents which can be used with great advantage in washing and cleaning fluids and detergent preparations. Such N-acyl-1-amino alkane-1,1-diphosphonic acids are prepared, for instance, by acylating the corresponding 1-amino alkane-1,1-diphosphonic acids or by hydrolyzing the corresponding (1,1-diphosphono alkane) acylamidines.

Abstract: Melamine resin films prepared by impregnating paper, cellulose fleece or fabric with a solution of a monomeric dimethylolmelamine mono-, di- or trimethylether, monomeric trimethylolmelamine mono-, di- or trimethylether or a mixture thereof and drying the same at temperatures of about 130.degree. to about 180.degree. C.

Abstract: Disclosed is a heart beat waveform monitoring apparatus for electronically analyzing the heart beat of an individual to recognize the unique characteristics of pre-ventricular contractions and other abnormalities of the heart beat rhythm, The device can detect and warn of the presence of tachycardia as well as prevent false indications of a "heart attack" due to noise. Logic circuits are provided to detect the characteristics of the abnormalities and to actuate an indicator.

Abstract: Substantially pure amino methylene phosphonic acids, such as ethylene diamine tetra-(methylene phosphonic acid), nitrilo tris-(methylene phosphonic acid), and others are obtained in a high yield by reacting .alpha.-amino mono- or polycarboxylic acids which are substituted at their amino nitrogen atom, or their alkali metal salts with phosphorous acid and/or a phosphorus trihalogenide, preferably phosphorus trichloride in the presence or absence of an inert diluent.

Abstract: High quality coatings and the like are formed from dispersions in a reactive liquid of finely divided solid isocyanated polyester resin having isocyanate groups part of which are masked but become unmasked upon heating and then react with the liquid. The liquid is essentially one or more highly etherified methylolated aminotriazine in which some of etherifying is with alkoxyethyl groups that provide relatively low viscosity and good reactivity.

Abstract: Melamine resin films prepared by impregnating paper, cellulose fleece or fabric with a solution of a monomeric dimethylolmelamine mon-, di- or trimethylether, monomeric trimethylolmelamine mono-, di or trimethylether or a mixture thereof and drying the same at temperatures of about 130.degree. to about 180.degree.C.