Metal working – Method of mechanical manufacture – Electrical device making
Patent
1990-11-15
1993-07-13
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
26427219, 336 96, H01F 4106
Patent
active
052262219
ABSTRACT:
A solenoid coil is fabricated by precision winding a length of magnet wire to form a free-standing coil, disposing the coil on a terminal holder containing electrical terminals, connecting the wire terminations to the electrical terminals, supporting such a sub-assembly within a mold cavity, injecting flowable plastic material into the cavity to wholly envelop the coil, the terminal holder and proximal portions of the terminals, allowing the plastic to cure and thereby form an enclosure which is devoid of any seams extending from its exterior to either the coil or the terminal holder, and then removing the encapsulated assembly from the mold cavity. 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 and it has sealing surfaces whose surface finish and dimensions are closely controlled.
REFERENCES:
patent: 3045290 (1962-07-01), Anderson et al.
patent: 3240848 (1966-03-01), Burke et al.
patent: 3348143 (1967-10-01), Hodges et al.
patent: 3848208 (1974-11-01), Dawson et al.
Boller George L.
Hall Carl E.
Siemens Automotive L.P.
Wells Russel C.
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