Hermetically sealed high-pressure solenoid coil and method

Details Hermetically sealed high-pressure solenoid coil and method Hermetically sealed high-pressure solenoid coil and method

1990-12-14

1991-11-12

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Magnet structure or material

296021, 336722, H01F 500

Patent

active

050651285

ABSTRACT:
A solenoid coil is fabricated by precisioin winding a length of bondable magnet wire on a mandrel, heating and axially compressing the precision-wound convolutions to cause the bondable insulation to deform into a unitary, void-free mass, but without deforming the pre-existing circular cross section of the conductive metal core of the wire, and allowing the wire to cool such that the mass immovably captures the convolutions of the conductive core to thereby form a free-standing coil. The coil is then disposed in a mold cavity where the entirety of the coil is encapsulated. This produces a solenoid coil that is well-suited for use in high-pressure "wet" environments because the encapsulated assembly is strong and leak-proof. The encapsulant may be molded in such a manner as to have no seams extending from its surface to the winding.

REFERENCES:
patent: 3043994 (1962-07-01), Anderson et al.
patent: 3076919 (1963-02-01), Hamilton et al.
patent: 3451021 (1969-06-01), Atherton

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