Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Work or object holding type
Patent
1995-06-28
1998-10-27
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Work or object holding type
335164, H01F 720
Patent
active
058282815
ABSTRACT:
A rotary switch adapted to be integrated into a push-to-start electrical control for a clothes dryer or the like employs a rotatable and axially translatable operator having an outwardly extending arm supporting a downward finger which travels across a pivotally mounted and downwardly arcuate lever to open and close contacts mounted on one end of the lever with rotation of the operator. Stops on rotation ensure that the finger is positioned on the lever so as to provide positive biasing of the operator to its end positions. The armature of a relay is actuated by a second arm from the operator contacting the armature within a triangle formed by the electromagnet coil and pivot supports preventing de-stabilization of the armature by the operator. Assembly of the relay to a base of the switch is provided by integrally molded hooks receiving tabs which cover holes necessary for the hook's manufacture. The operator is supported in a socket having a thin bottom wall that breaks free upon axial impact against the operator such as otherwise would be expected to damage the integrity of the switch housing.
REFERENCES:
patent: 3784944 (1974-01-01), Schantz et al.
patent: 4048599 (1977-09-01), Groth
patent: 4264886 (1981-04-01), Nettro
patent: 4338583 (1982-07-01), Mathieu
patent: 4995650 (1991-02-01), Hapke et al.
patent: 5153393 (1992-10-01), Hapke et al.
Hapke Kenyon A.
Howie David M.
Schantz Spencer C.
Donovan Lincoln
U.S. Controls Corporation
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