Metal working – Method of mechanical manufacture – Electrical device making
Patent
1979-11-15
1982-04-06
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
29235, 29451, H01F 4100
Patent
active
043228844
ABSTRACT:
A device for introducing an anti-microphony sponge into an air-cored coil for television channel selectors comprising an axially displaceable hollow mandrel with an end portion which comprises two diametrically oppositely situated slots. Two blocking members can be introduced into the slots, after which cutting means are displaceable in a direction transversely of the axis of the mandrel. After the introduction of a length of spongy material into the mandrel, an air-cored coil is arranged on the end portion of the mandrel, after which the blocking means are moved into the slots so that the length of spongy material is clamped on both sides of the air-cored coil. Subsequently, the mandrel is withdrawn from the coil and the length of spongy material is cut in the zone between the blocking means and the withdrawn mandrel, a piece of spongy material then being left behind in the air-cored coil. After withdrawal of the blocking means to their starting position, the air-cored coil with the piece of spongy material is discharged from the device.
REFERENCES:
patent: 1702031 (1929-02-01), Wesseler
patent: 3145464 (1964-08-01), Green
patent: 3894328 (1975-07-01), Jansson
Franzblau Bernard
Hall Carl E.
Mayer Robert T.
U.S. Philips Corporation
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