Showing papers by "3M published in 1966"
3M1
TL;DR: In this paper, the transmission and reflectance of cuprous oxide has been measured from 6 to 250 \ensuremath{\mu} and analyzed by classical dispersion theory, and the two infrared-active vibrational frequencies are given by
Abstract: The transmission and reflectance of cuprous oxide has been measured from 6 to 250 \ensuremath{\mu} and analyzed by classical dispersion theory. The two infrared-active vibrational frequencies are given by ${\ensuremath{
u}}_{1}=613$ ${\mathrm{cm}}^{\ensuremath{-}1}$ and ${\ensuremath{
u}}_{2}=146.0$ ${\mathrm{cm}}^{\ensuremath{-}1}$ with corresponding longitudinal-mode frequencies of 638 and 149 ${\mathrm{cm}}^{\ensuremath{-}1}$. The maximum values of the extinction coefficient are calculated to be 2.7 and 4.0, respectively, for the two modes; both are higher than the literature values. The high-frequency and static dielectric constants are found to be ${\ensuremath{\epsilon}}_{\ensuremath{\infty}}=6.6$ and ${\ensuremath{\epsilon}}_{0}=7.6$, respectively.
53 citations
Patent•
3M1
TL;DR: In this paper, a dropout compensator for the PAL color television system is presented. But, the color information is also delayed to compensate for the luminance dropout, and the color signal is also modulated to produce the proper color dropout signal.
Abstract: The present invention is directed to a dropout compensator for use in compensating for dropouts in the PAL color television system. The present invention separates the luminance information and the color information and feeds the separate information into two channels and operates on these channels independently. Specifically, the luminance information is delayed to provide for a luminance dropout compensating signal. The color information is also delayed but, in addition, the color information undergoes one of several types of functional operations so that the color information may be added to the luminance information to provide for the proper dropout compensating signal which may be substituted for the regular video signal when the dropout occurs. In one example of the invention, the color information is delayed for approximately a two-line period and then phase shifted in order to provide for the proper color dropout signal. In a second embodiment of the invention, the color signal is delayed and passed through a conjugate function generator to average out the errors over two lines and the color signal is then passed through a final one-line delay. In a final embodiment of the invention, the color signal is delayed a single line and is then modulated to produce the proper color dropout signal.
36 citations
3M1
17 citations
3M1
17 citations
3M1
TL;DR: In the case of mild steel, the absence of atmospheric oxygen makes grinding almost impossible as discussed by the authors, and other reactive group VIA and VIIA compounds improve grinding performance even more than oxygen.
16 citations
3M1
TL;DR: The synthesis of 3-methyl-2-phenylbenzimidazole-1-oxide (VIII) has been accomplished as mentioned in this paper, and it has been shown that I shows no tendency to exist as an N-oxide in aqueous solution.
12 citations
3M1
8 citations
3M1
TL;DR: In this article, the authors describe polyesters and polyamides obtained by the base-catalyzed additions of hydrogen sulfide to α,β-unsaturated diesters and diamides.
Abstract: This paper describes polyesters and polyamides obtained by the base-catalyzed additions of hydrogen sulfide to α,β-unsaturated diesters and diamides. The compounds employed were ethylene diacrylate, the diacrylate of trans-1,4-bis(hydroxymethyl)cyclohexane, p-xylylene diacrylate, hydroquinone diacrylate, the diacrylate of 1,4-butanedithiol, tetraethylene glycol dimethacrylate, 1,4-butylene dicrotonate, 1,4-butylene dicinnamate, methylene bisacrylamide, and m-xylylene bisacrylamide. The polymers posses the general formula, , wherein R1 is hydrogen, methyl, or phenyl, R2 is hydrogen or methyl, R3 is an alkylene, aralkylene, or oxyalkylene group, and X is oxygen, sulfur, or the imino group. Polymers with as many as several hundred repeating units were obtained. Depending upon the structure, the products are liquids, rubbers, or solids, the polymers are obtained with vinyl or sulfhydryl termination and the efficiency of this termination is very high, as was shown by chain extension of a sulfhydryl-terminated polymer through oxidation to a polydisulfide, , having a molecular weight 30 times as great as that of the parent dimercaptan. The syntheses of several new monomers are described.
5 citations
3M1
TL;DR: In this article, the authors show that shear forces in the sapphire-steel interface can be reduced with increased sliding speeds, and the high temperatures generated at the higher sliding speeds appear to promote chemical reactions, the products of which serve to decrease the shear force in the interface.
3M1
TL;DR: In this paper, a shock tube test is described, in which fine dusts or sprays of explosive materials are ignited behind the reflected shock, and the dependence of the measured ignition delay on reflected shock temperature is determined.
Patent•
3M1
TL;DR: In this article, an upper heat-developable layer sensitive to visible light and a lower heat-developed-layer sensitive to ultraviolet radiation forms a positive image of an original by a process involving only exposing and heating.
Abstract: Sheet material having an upper heat-developable layer sensitive to visible light and a lower heat-developable layer sensitive to ultraviolet radiation forms a positive image of an original by a process involving only exposing and heating.
3M1
Patent•
3M1
TL;DR: A compound of the SPC1 formula, where n is a number from 1 to 3, m is 3-n, p is from 1-11, r is from 3-r, s is 3r, x is 1-3 and y is 4-x, provided that at least one of r and x is a 1 as discussed by the authors.
Abstract: A compound of the formula ##SPC1## Wherein n is a number from 1 to 3, m is 3-n, p is from 1 to 11, r is from 1 to 3, s is 3-r, x is 1 to 3 and y is 4-x, provided that at least one of r and x is 1.