Abstract: An alumino earth-alkali silicate glass for lamp bulbs of tungsten halogen incandescent lamps has the following glass composition (% by weight) that reduces discoloration during operation of the lamp bulb: SiO2 55.0–62.5?? Al2O3 14.5–18.5?? B2O3 0.8–4.0?? BaO 7.5–17.0? CaO 6.5–13.5? MgO 1.0–5.5?? SrO 0–2.0 ZrO2 0–1.5 TiO2 0–1.0 ZnO 0–0.5 CeO2 0–0.3 R2O <0.03 H2O 0.025–0.042.

Abstract: An alumino earth-alkali silicate glass for lamp bulbs of tungsten halogen incandescent lamps has the following glass composition (% by weight) that reduces discoloration during operation of the lamp bulb: SiO2 55.0-62.5?? Al2O3 14.5-18.5?? B2O3 0.8-4.0?? BaO 7.5-17.0? CaO 6.5-13.5? MgO 1.0-5.5?? SrO 0-2.0 ZrO2 0-1.5 TiO2 0-1.0 ZnO 0-0.5 CeO2 0-0.3 R2O <0.03 H2O 0.025-0.

Abstract: The invention relates to alumino earth-alkali silicate glasses for molybdenum glass fusions in the form of light bulbs, as the outer shell for lamps, in particular for lamps with regenerative halogen cycles at bulb temperatures of from over 550° C. up to 700° C. Surprisingly and contrary to the current expectation it was found that alumino earth-alkali silicate glasses with a water content of 0.025 to 0.042 wt. % meet the requirements for halogen lamp glass and do not display any disadvantages due to the presence of the above impurity for the halogen cycle process at bulb temperatures of between 550 and 700° C. In glasses with a water content of from 0.025 to 0.042 wt. % the water present does not act as an impurity in the sense that it does not disturb the equilibrium between formation and decomposition of tungsten halides. A blackening of the inner surface of the bulb does not occur, or not a greater degree when compared with bulb glasses with a considerably lower water content.

Abstract: A flange is formed on a workpiece by first mounting the workpiece in an inner holder shiftable along about a main axis and securing the inner holder against rotation about the main axis. A roller is rotated about the main axis adjacent the inner holder. Then the inner holder and workpiece are displaced axially to press the workpiece axially against the roller and deform the workpiece and form a flange thereon. This is done without heating the workpiece, that is in a cold-forming operation.

Abstract: A flange is formed on a workpiece by first mounting the workpiece in an inner holder shiftable along about a main axis and securing the inner holder against rotation about the main axis. A roller is rotated about the main axis adjacent the inner holder. Then the inner holder and workpiece are displaced axially to press the workpiece axially against the roller and deform the workpiece and form a flange thereon. This is done without heating the workpiece, that is in a cold-forming operation.

Abstract: A diagnostic circuit (18) for a potentiometric sensor (10) having an electrically resistive means (12) and a sliding contact (14) in connection with the resistive means and providing an output from the sensor at a sensor output terminal (16), the diagnostic circuit comprising a low pass filter (36) connectable between the sliding contact and the sensor output terminal; alternating voltage supply means (20,21,22,24) having a high impedance connectable to the sliding contact; and amplitude modulation demodulating means (30,32,34) connectable between the sliding contact and a diagnostic output terminal (38), the voltage at the diagnostic output terminal providing an indication of the contact resistance between the sliding contact and the resistive means of the sensor. Monitors the contact resistance without interfering with the sensor output.