Abstract: The invention relates to a high-pressure sodium discharge lamp in which the elongate discharge vessel is provided with an external ignition antenna consisting of a thin spiralized wire. According to the invention, an end of the antenna is fixed directly to a support member without a mandril at a location axially spaced from said discharge vessel in the extended direction of the discharge vessel and mounted elastically and with pretension over substantially its entire length.

Abstract: A high-pressure sodium vapor discharge lamp having a discharge vessel in which main electrodes are arranged and an ignition system which comprises an electric conductor surrounding the discharge vessel over at least a part of its circumference, which conductor is electrically connected to a main electrode at least in the inoperative state of the lamp. The electric conductor is a clamping member clamping around the discharge vessel. A fixed, arcuate positioning of the electric conductor is thus obtained.

Abstract: A resistance paste for the manufacture of a resistor body, for example, by silk-screening and the resistance body manufactured herewith, which paste comprises a mixture of Pb.sub.2 Rh.sub.x Ru.sub.2-x O.sub.7-y, a permanent binder and a temporary firable binder. In the formula 0.15.ltoreq.x.ltoreq.0.95 and 0.ltoreq.y.ltoreq.1/2. The resulting resistor body in the temperature range from -55.degree. to +150.degree. C. has a temperature coefficient of the resistance between -10.times.10.sup.-6 /.degree.C. and +10.times.10.sup.-6 /.degree.C. and is very stable. The resistance variation during the life of the resistor is smaller than .+-.0.5%.

Abstract: Resistive paste for manufacturing a resistor body by means of screen-printing the paste on a substrate, followed by firing. The paste comprises a silver-palladium alloy, a metal oxidic compound which contains either PdO and/or can react therewith, a permanent and a temporary binder. The metal oxidic compound may be provided as a layer on the AgPd particles or be mixed therewith. The result is a low-ohmic resistor having a .vertline.TRC.vertline.<100.times.10.sup.-6 /.degree.C. in the range from -60.degree. to +200.degree. C.

Abstract: Resistance material consisting of a mixture of metal oxidic compounds, metal oxides, a permanent binder and a temporary binder, the resistance-determining component consisting of barium-rhodate BaRh.sub.6 O.sub.12. This component has a linear positive temperature coefficient of the resistance (TCR) and enables the production of a resistor having a very low TCR by combining the material with a material having a negative TCR. The resistor is obtained by firing this resistance material after it has been applied onto a substrate.

Abstract: Resistance material consisting of a mixture of metal oxidic compounds, metal oxides, a permanent and a temporary binder, the resistance-determining component consisting of thallium rhodate TlRh.sub.2 O.sub.4. This component has a linear positive temperature coefficient of the resistance TCR which enables the composition of a resistor having a very low TCR by combining it with a material having a negative TCR. The resistor is produced on the basis of this resistance material provided on a substrate.

Abstract: .[.Resistance material consisting of a mixture of metal oxidic compounds, metal oxides, a permanent binder and a temporary binder, the resistance-determining component consisting of barium-rhodate BaRh.sub.6 O.sub.12..]. .Iadd.Resistance material consisting essentially of a mixture of a permanent binder, a temporary binder and, as a resistance determining component, a barium-rhodate of the formula BaRh.sub.6 O.sub.12. .Iaddend.This component has a linear positive temperature coefficient of the resistance (TCR) and enables the production of a resistor having a very low TCR by combining the material with a material having a negative TCR. The resistor is obtained by firing this resistance material after it has been applied onto a substrate.