Metal working – Method of mechanical manufacture – Electrical device making
Patent
1978-04-12
1979-12-25
Braun, Fred L.
Metal working
Method of mechanical manufacture
Electrical device making
335151, 335154, H01H 1100, H01H 6500, H01H 5128
Patent
active
041797981
ABSTRACT:
The position of an armature 22 located within a sealed glass envelope 12 of a sealed contact switch 11 is adjusted to meet a gap width requirement between the armature and an electrical contact 23. The glass envelope 12 is placed into a holer 48 adjacent a magnetic pole face of a magnetizing apparatus. The holder 48 supports the envelope in a position wherein the armature 22 becomes oriented perpendicular to a magnetic force field and the path of movement of the armature in closing or opening the contact extends in the same direction as that of the field. Under the influence of the applied magnetic field, the armature 22 is yieldably pulled beyond its normal path of movement toward the pole face. When the envelope is removed from the field, the armature remains in an adjusted rest position within the envelope, different from its initial rest position. The adjustment of the armature is useful in the manufacture of mercury-wetted sealed contact switches. Operations of the manufacture include a test of operating parameters. Results from the test are used to adjust the strength of the field to be applied to switches. A resulting slight or more severe adjustment of the armature results in more uniform operating characteristics of any lot of manufactured switches.
REFERENCES:
patent: 3242557 (1966-03-01), Ellwood
patent: 3579158 (1971-05-01), Kutyla
Einbinder Itamar B.
Hamilton Albert A.
Braun Fred L.
Schellin W. O.
Western Electric Co. Inc.
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