Abstract:
An apparatus for the manufacture of electronic components and more particularly in the electronic tube art wherein bell-shaped eyelet shield members are threaded on and positioned accurately on stem lead members of an assembly used in electronic tubes. This is accomplished by the provision of a plurality of holding cavities for supporting and positioning the eyelet members and providing easy insertion of the stem lead members into the eyelets. In addition, means is provided for accurately positioning the stem with respect to the eyelet holding cavities and crimping means is provided for securing the eyelet to the stem lead wherein a force is simultaneously applied to opposite sides of a portion of the eyelet members to crimp the eyelet members to the stem lead without the undesirable forces being applied to the stem lead assembly. Orientation cavities are provided for leading the eyelets into the holding cavities.
Abstract:
Apparatus and method for simultaneously producing four piece lead wire assemblies during which a plurality of wires are fed at varying intervals to a rotating turret as it revolves through a series of three work stations and one idle station. At the first work station, a first lead wire is fed into the turret where it is clamped by a clamping means located within the turret. A cutter then cuts the first wire after which this newly formed first piece is rotated to the second work station wherein a second wire is fed, cut, and bonded to one end. This joined assembly is then rotated to the idle station where, after a predetermined time interval, it is rotated to the third work station. Here, a third wire is fed, cut and joined to the unbonded end of the second lead. During this same time period, a fourth wire is fed, cut, and joined to the unbonded end of the first lead. The entire four piece lead wire assembly is then ejected from the turret into a receiving magazine.
Abstract:
Lamps operating at high temperatures, and more particularly incandescent or arc lamps having sealed-in lead-in electrical conductors with improved service characteristics and longer service life are fabricated with a ''''coating'''' on the aforesaid leads comprising at least one of the following: a phosphate or phosphide of tungsten, or a phosphate or phosphide of molybdenum. Illustrative of the results obtained upon service testing 400-W, 120-V quartz-iodine lamps, at operating temperatures of 500*600* C., using A. untreated, uncoated, molybdenum electrode assemblies, B. platinum-clad, molybdenum electrode assemblies (exemplary of the prior-art techniques), and C. tungsten phosphate-coated molybdenum electrode assemblies, ARE AS FOLLOWS: A. failed through oxidation and subsequent disintegration, with accompanying seal and lamp failure at 100 hours'' operation, B. failed at approximately 150 hours of life testing, C. was still operating on a life test after 200 hours. Processes for forming metal phosphides from metal phosphates and process for coating leads with refractory metal phosphates and phosphides are also disclosed.
Abstract:
An envelope of glass of high silica content, such as quartz glass or similar, has molybdenum foils pinch-sealed into the lamp envelope. Lamp components of refractory material, such as molybdenum, or tungsten are welded to the foils, for example by ultrasonic welding, by interposition of an intermediate layer of aluminum foil, for example up to 0.1 mm. thickness.