Abstract: A method of thermally treating glass products in which the products are conveyed through a number of heating zones and/or cooling zones of a tunnel furnace and are heated and cooled, respectively, by means of an airflow maintained in each zone in a direction transverse to the direction of transport; according the invention, the velocity of the airflow increases gradually both in the heating zones and in the cooling zones; for that purpose, two perforated partitions having gradually increasing flow apertures for the airflow are provided in each zone.

Abstract: Supporting means for a color selection electrode of a color cathode ray tube comprising metal pins sealed in the wall of the tube, and resilient clamping members secured to the electrodes and bearing upon pairs of the pins.

Abstract: Method of sealing glass objects to one another by means of comparatively low voltages, in which method the preheated seal joint is heated by passing current through it by means of a large number of electrodes which are in mechanical contact with the glass and belong to at least two current circuits which are periodically switched on and off and each comprise at least two series-connected current sources.