Abstract: A high contrast cathode ray display tube is provided by using a color filter glass faceplate for the tube which has a narrow band of transmissivity which closely matches the display phosphor emission.

Abstract: Disclosed is a cathode-ray tube having a face plate of soft glass which up to an accelerating voltage of 40 KV gives an X-ray emission of at most 0.5 mr/h measured at a distance of 5 cm. The glass has a strain point between 450.degree. and 480.degree. C. and a softening temperature between 660.degree. and 770.degree. C. and comprises, inter alia, 3-14% by weight of BaO and 5-10% by weight of PbO.

Abstract: A high resistive electrical conductive coating of discrete composition is provided for band-like deposition in a defined area of the interior surface of substantially the funnel member of a cathode ray tube envelope between the region of the high potential transversal therethrough and the electron generating means oriented in the contiguous neck portion. The coating is an amorphous deposition of a homogeneous mixture of a vitreous substantially insulative frit material admixed with at least one particulate material selected from the group consisting essentially of cadmium oxide, indium oxide and copper oxide wherein the individual particles of the respective oxide ingredients are uniformly dispersed and encapsulated to provide a discretely defined resistive structural means for effecting arc suppression in the region of the electron generating assembly.

Abstract: An amorphous, resistive thin film is deposited on internal surfaces of portions of a cathode ray tube by the pyrolysis of a liquid mixture of colloidal graphite and a heavy metal resinate to produce a film which is a mixture of graphite and the oxide of the metal. The metal resinate is a combination of tin and antimony resinate. The film is deposited on the tube neck in the region of the G3 and G4 electrodes to impede arcing. The amorphous film is also deposited on the tube funnel in the region extending from the snubber contact locations up to the anode voltage terminal. The pyrolysis of the heavy metal resinate and colloidal graphite results in a film having a resistance ranging from 10.sup.3 to 10.sup.8 ohms point to point. The amorphous film which does not require a binder, has good adhesion and scratch resistance characteristics, thereby reducing conductive particle contamination.

Abstract: Glass for the envelope of television display cathode-ray tubes, particularly for the face plate of a colour display tube and having a composition in % by weight within the range limited as follows:______________________________________ SiO.sub.2 54-69 Na.sub.2 O 6-10 [Na.sub.2 O] + [K.sub.2 O] combined 14-20 K.sub.2 O 5-10 CaO 0- 4 MgO 0-2.5 Al.sub.2 O.sub.3 0- 6 [Al.sub.2 O.sub.3 ] + [ZrO.sub.2 ] < 6 ZrO.sub.2 0- 6 BaO 8-18 2 [ZrO.sub.2 ] + [BaO] + [ZnO] + 4 [Sb.sub.2 O.sub.3 ] > 20 ZnO 0- 5 [ZrO.sub.2 ] + [ZnO] + [Sb.sub.2 O.sub.3 ] > 3 CeO.sub.2 0.05-0.3 Sb.sub.2 O.sub.3 0- 3 [Sb.sub.2 O.sub.3 ] + [As.sub.2 O.sub.3 ] .gtoreq. 0.3 As.sub.2 O.sub.3 0-0.

Abstract: A cathode-ray tube, such as a color television tube, formed from a glass containing up to 20 percent by weight of strontium oxide as an essential ingredient thereof, which tube has imparted thereto improved X-ray absorbing properties without any material increase in the X-ray and electron browning of the glass.

Abstract: A cathode-ray tube, such as a color television tube, formed from a glass containing up to 20 percent by weight of strontium oxide as an essential ingredient thereof, which tube has imparted thereto improved X-ray absorbing properties without any material increase in the X-ray and electron browning of the glass.

Abstract: Methods and apparatus are provided for efficiently processing vacuum tubes containing microchannel plate electron multipliers. The vacuum tube body containing the microchannel plate is thermally treated under vacuum prior to sealing the tube faceplates by means of reversible melted metal seals.

Abstract: An evacuated envelope having at least one ceramic component and one aluminum component sealed to one another along a common interface. A metallized layer is on said ceramic component along said interface and a fused solder having an Al-Si eutectic structure with 89% aluminum and 11% silicon is along said interface.

Abstract: Disclosed are glass compositions containing specified critical proportions of ZrO.sub.2, PbO, BaO, and SrO, to achieve X-ray absorption, resistance to devitrification and other glass forming properties which render them particularly suited for the manufacture of faceplates for cathode ray tubes for color television applications.