Process for joining electrodes and product resulting therefrom
OwnerRonald F. Gabouryinventor
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Abstract
A process to form a positive electrode of an arc by joining two principal carbon-base electrodes and the product resulting therefrom. The two principal electrodes are axially perforated at one of their ends to tightly receive a small secondary electrode which fills the perforations. The small secondary electrode is a mixture of carbon and graphite covered with a copper layer. The material of the three electrodes is compatible so as to operate at an optimum temperature, amperage and color which are essentially the same for use in a cinematographic projector.
Claims5
A process for joining two principal carbon electrodes for forming a positive electrode of an arc in the illumination of a cinematographic projector, the said principal electrodes each consisting of a core and of sleeve surrounding and adhering to said core, the said process comprising the following steps:
- a. perforating an axial smooth wall blind hole at one end of each of the two principal electrodes solely in the core thereof;
- b. joining the said two principal electrodes end to end by introducing a smooth surface secondary electrode into the two blind holes of the said two principal electrodes until the ends of said two principal electrodes directly contact each other, the said secondary electrode being constituted of a material similar to that of the said principal electrodes, the said secondary electrode having a diameter to tightly fit into the said blind holes to maintain a retention of the said three electrodes together.
A combination of two principal carbon electrodes and a secondary carbon electrode for illumination use in a cinematographic projector, the said principal electrodes each constitutes of a core and of a sleeve surrounding and adhering to said core, at least one end of each principal electrodes being provided with a smooth wall cylindrical axial blind hole of a diameter less than the diameter of the core and solely made axially in said core, the secondary electrode being cylindrical and smooth wall, having a diameter slightly greater than the diameter of said blind holes and made of a carbon material similar to that of said principal electrodes, said secondary electrode inserted into the blind holes of said two principal electrodes with the bored ends of the latter in direct contact with each other, said secondary electrode being press-fitted within said blind holes and joining the two principal electrodes in end-to-end relation.
Dependencies are inferred from the claim text.