Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1987-01-20
1987-12-01
Goldberg, E. A.
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335257, 335277, 335132, H01F 712
Patent
active
047107405
ABSTRACT:
An electromagnetic operator for a contactor (2) having a housing (4,34) including an insulating upper part (4) and a snap-in lower part (34), a magnetic armature (24) movable in the upper part (4), and a magnetic core (30), molded coil (28), return spring (36) and shock pad (32) in the lower part (34). The molded coil (28) is clamped immovably by the lower part (34) against the upper part (4) of the housing. The shock pad (32) has a flat base (32a) with a thin spherical segment (32b) between the magnet core (30) and the lower part (34) and four tabs (32c-f) at its corners supporting the four legs (28c-d) of the molded coil (28) to press the latter securely against the upper part (4) of the housing, these legs (28c-d) having reduced sections (28e-f) that sink into those tabs (32c-f). The shock pad (32) also has two pairs of resilient strips (32g,h,j,k) that extend from the opposite edges of the base (32a) up and toward one another between the yoke portions (32c,d) of the magnetic core (30) and the coil (28). This shock pad (32) takes up tolerances and isolates the magnetic core (30) for limited rocking movement in any radial direction to enable it to seat fully against the armature (24) when the coil (28) is energized. Alternatively, the resilient strips (32c-f) may be two continuous bands that can be stretched to assemble the shock pad (32) on the E-shaped magnetic core.
REFERENCES:
patent: 2671187 (1954-03-01), Jencks
patent: 3060355 (1962-10-01), Kruzic
patent: 3195024 (1965-07-01), Conrath
patent: 3469215 (1969-09-01), Brovedan
patent: 3501724 (1970-03-01), Westphal
patent: 4087770 (1978-05-01), Kuhn et al.
patent: 4525694 (1985-06-01), Dennison et al.
Donovan Lincoln
Eaton Corporation
Goldberg E. A.
Rowe D. A.
Vande Zande L. G.
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