It is feasible with the aid of an indicator-cartridge to determine even trace quantities of carbon monoxide in air and in various gas mixts.. Determination is based on easily discernible colour reactions on the charge of the cartridge. The charge contains chlorine and chloride

In a system for simplifying the use a plurality of credit cards, cheque cards, client cards and the like, an electronic multifunction card is provided with a memory capable of recording a plurality of individual data sets of any single-purpose cards, at least two electronically activated data display windows (displays) and contact elements accessible from the outside, which make it possible to ski...

The coaxial cable has a combiend outer conductor (3) formed on the insulation (2) of an inner conducting core (1). The combined outer conductor consists of two single metallised plastics material foils (31, 32) that overlap along a seam. Between the two foils are conducting wires (33) that have a sinusoidal pattern in an axial direction. The inner core (1) is of copper wire that has a 0.59 mm dia....

The invention relates to a cylindrical load transfer switch of a stepping switch, which consists of a separate oil vessel and a load transfer switch insert which is arranged in a standing manner therein and can be pulled out upwards. The load transfer switch insert has a central, vertical, supporting column which has holes in the upper region, in which spring bars are located which engage in the b...

The high-pressure discharge lamp has around the lamp vessel (3) an inner sheath (5) of quartz glass and an outer sheath (6) of aluminosilicate glass. An interference filter (15) reflecting UV radiation is present between the lamp vessel (3) and the outer sheath (6). The light emitted by the lamp thus satisfies the conventional standards.

The electric lamp has a hollow body (20) of synthetic material in its lamp cap (6), which screens a current supply conductor (11) extending to a base contact member (8) of the lamp cap from the shell portion (13) of the lamp cap (6). The body (20) has projections (22) distributed over it, which bear with clamping fit on the shell portion (13).

An electric light filament comprising a single crystal whisker is disclosed. In the preferred embodiment the whisker consists essentially of silicon carbide (SiC), preferably beta silicon carbide, doped with a sufficient amount of nitrogen to render the whisker sufficiently electrically conductive to be useful as a light bulb filament at household voltages. Filaments made of such materials are cha...

An apparatus for manufacturing a light diffusing glass envelope, the apparatus comprises means (2, 12, 16) for forming a glass envelope from a layer (8) of glass at an elevated temperature and means (22) for electrostatically depositing particles of a powder on the internal surface of said glass envelope (20) to form a coating on said internal surface. The means (22) for electrostatically depositi...