Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Contact-actuating means
Patent
1979-10-01
1981-08-25
Hickey, Robert J.
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Contact-actuating means
335247, 335258, H01F 712, H01H 360
Patent
active
042862434
ABSTRACT:
A switch construction having a support carrying switch contacts and an electrical coil that has an armature operatively associated with the switch contacts to cause a switching operation therewith when the coil is energized to attract the armature from a first position thereof to a second position thereof relative to the coil. A mechanical spring arrangement is operatively associated with the armature to continuously resist the movement thereof from the first position thereof to the second position thereof with an increasing force that overcomes the increasing pull in force of the energized coil on the armature before the armature reaches its zero gap with the energized coil whereby the spring arrangement prevents the armature from reaching its zero gap and thereby causes the switch construction to be relatively noiseless in the operation thereof.
REFERENCES:
patent: 3665353 (1972-05-01), Campbell
patent: 4063204 (1977-12-01), McFarlin
patent: 4095200 (1978-06-01), Gallatin
patent: 4114125 (1978-09-01), Komatsu
patent: 4177440 (1979-12-01), Merlette
Hickey Robert J.
Robertshaw Controls Company
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