Abstract: A picture taking tube with pyroelectric target and a process for determining the axes of least expansion of the target are provided. A connection is formed between the two electrodes of the target and the point of contact of this connection with the electrode deposited on the target is situated in the vicinity of one of the axes of least expansion of the target.

Abstract: The invention provides an improved method of construction of a prefocus lamp, to improve positioning of the filament relative to the lamp cap, and a lamp so made. The lamp envelope has a pinch seal with V-shaped grooves into which a resilient ring is sprung. This assembly is a sliding fit in the lamp cap and is slid therein to have substantially only line contact between the ring and the cap. The envelope can then be relatively easily rocked and otherwise moved in the lamp cap to be precisely positioned. When the positioning is complete solder previously placed in the cap is melted, the position being such that it flows over the ring and fixes the ring to the lamp cap.

Abstract: A deflection unit for a color television display tube comprising line and frame deflection coils and a magnet core cooperating with said coils can be manufactured by placing the deflection coils and the magnet core around the part of the transition neck-cone of a color display tube in such manner that the deflection coils engage or substantially engage the tube, which display tube comprises an adjusted color purity magnet, after which the tube is adjusted so as to be color pure by moving the magnet core along the axis of the tube, after which, if desired, the magnet core is moved in known manner in a plane perpendicular to the tube axis so as to remove convergence errors and the magnet core and the coils are then connected together to form the deflection unit.

Abstract: A kinescope envelope which rests on a fixture is positioned at a location where the envelope size is determined. The envelope is removed from the fixture and positioned at a preselected position where the panel-funnel offset is determined. The size and offset of the envelope are provided to a controller and the offset is compared to a stored designed offset to determine an offset difference. The offset difference is compared to an offset tolerance and a reject signal is provided when the offset tolerance is exceeded. The reject signal is used to place a reject mark on the envelope and to dispense an identification article onto the potentially defective fixture.

Abstract: The operability of the connecting sockets of a kinescope aging line is verified by applying the aging voltages through ammeters. The current plots are side-by-side whereby low current plots for both voltages indicate an empty carrier while a low current for only one of the plots indicates a defective socket.

Abstract: The radiation generated by electrons from field emission current striking the anode of a high voltage vacuum device is used as an analog for the emission current in a method for assessing the dielectric state of the device. The emission current is determined by applying a variable voltage, less than that required to produce breakdown, to the device and measuring the radiation generated by the emission current. The radiation measurement is correlated to the amount of field emission current by means of a predetermined relationship, and the field enhancement factor, .beta., associated with the dielectric state of the device is determined from the slope of a plot of the logarithm of the quantity resulting from dividing the emission current by the square of the applied voltage, versus the reciprocal of the applied voltage. Alternatively, .beta. may be determined from the slope of a plot of the measured radiation versus the reciprocal voltage.

Abstract: The invention concerns a process and a device ensuring the fixation on the neck of a cathode tube of the deflection yoke of the tube. According to the invention, the deflection yoke 3 is fixed after its positioning has been determined between a fixed abutment 9 which may be adjustable in position and an elastic abutment 6 which presses the yoke 3 against the abutment 9. The invention applies especially to tubes adapted to be fitted to color television receiver appliances.

Abstract: In a method of vaporizing getter material from a getter container inside a vacuum electron tube, light from the vaporization is sensed at least from the outset of the heating of the container. A time-dependent sample signal is produced from the sensed light which is compared with time-dependent criteria related to the vaporization, and a characteristic of the vaporization is derived from the comparison.

Abstract: Methods for accurately joining objects, especially optical objects, are disclosed comprising contacting the objects with light curable composition, causing light to transit at least one of the objects, evaluating the light, positioning the objects in response to the evaluation and irradiating the composition to harden it, thus to fixedly maintain a preselected spatial orientation among the objects.

Abstract: A color television display system handling and adjustment apparatus provides a means for maintaining accurate alignment between the base of a kinescope and an energization socket. The kinescope location within the apparatus is referenced to the kinescope front panel contour so that transverse movement of the kinescope does not cause significant movement of the kinescope base. The apparatus also provides means for simulating convergence adjustment of yokes constructed for front and rear tilt convergence adjustment.

Abstract: A high pressure metal (sodium) vapor lamp comprises an outer vitreous envelope and an inner ceramic arc tube supported within it. The arc tube contains vaporizable metal in excess of the quantity vaporized in operation and the heat balance determines a cold spot whereat excess metal collects. The temperature of the cold spot determines the metal vapor pressure and the voltage drop across the lamp which must lie between specified limits. A thermal link is provided to a metal member such as the exhaust tube the heat loss from which influences significantly the temperature of the cold spot. In completed lamps measuring too low in voltage, such thermal link may be partly severed without breaking open the outer envelope in order to raise the voltage. One convenient way utilizes an auxiliary wire which is cut by aiming a laser beam at it.

Abstract: In a method of manufacturing a color television display tube, marks for the positioning of the display window are provided on the funnel part of the tube. Upon providing the marks the funnel part is fixed in a centering device which locates in the funnel part a reference point to which the provision of the marks is referenced. The reference point is situated in or substantially in the deflection center of a deflection device provided afterwards on the funnel part.